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Downauth

Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.

Why "downauth" ?

Because finding names for software is hard.

What does it do

This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives to Basic in order to capture clear-text credentials. This is done by:

  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.

HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.

When the program receives Basic credentials, it will rewrite the auth to the format initially requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)

Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):

  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...) TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)

By default the tool will stop all attacks towards any given client after clear-text credentials have been captured from this client. To continue attacking no matter what, this can be disabled with the --nonstop option (very intrusive++).

Getting started

Example usage:

sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:

positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo

  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.

About

Downgrade HTTP authentication on the network to capture clear-text credentials from clients

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Readme
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19 stars

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3 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
About
Downgrade HTTP authentication on the network to capture clear-text credentials from clients
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Repository files navigation
Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
About
Downgrade HTTP authentication on the network to capture clear-text credentials from clients
Resources
Readme
Activity
Stars
19 stars
Watchers
3 watching
Forks
4 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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proxy.py
Repository files navigation
Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
About
Downgrade HTTP authentication on the network to capture clear-text credentials from clients
Resources
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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proxy.py
Repository files navigation
Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
About
Downgrade HTTP authentication on the network to capture clear-text credentials from clients
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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config.py
downauth.py
downauth.py
downgrade.py
downgrade.py
proxy.py
proxy.py
Repository files navigation
Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
About
Downgrade HTTP authentication on the network to capture clear-text credentials from clients
Resources
Readme
Activity
Stars
19 stars
Watchers
3 watching
Forks
4 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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downauth.py
downgrade.py
downgrade.py
proxy.py
proxy.py
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Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Repository files navigation
Downauth
Downauth is a script that downgrades authentication requests from servers in order to capture clear-text credentials from target clients.
Why "downauth" ?
Because finding names for software is hard.
What does it do
This tool is a man-in-the-middle utility intended to downgrade authentication requests it receives
to Basic in order to capture clear-text credentials. This is done by:
  • ARP cache poisoning the target(s) to redirect their traffic to the attacker ;
  • Starting a local HTTP proxy instance ;
  • Redirecting the targets' connections to the specified ports to the local proxy ;
  • Relaying HTTP/S traffic to and from clients ;
  • Intercepting NTLM, Negotiate and Digest auth. requests from the remote web servers or proxy ;
  • Rewriting the responses to request Basic authentication.
HTTPS will be intercepted if port 443 is specified, however clients may see certificate warnings.
When the program receives Basic credentials, it will rewrite the auth to the format initially
requested by the server. At the moment, this is supported for Digest auth only (TODO: NTLM / Negotiate)
Levels of attakcs from stealthiest to noisiest (different levels can be used simultaneously):
  1. Downgrade authentication requests in 407 responses (most likely domain accounts)
  2. Downgrade authentication requests in 401 responses (for web apps / intranets / ...)
TODO: 3. Rewrite 200 responses to 401 to force authentication (very intrusive)
By default the tool will stop all attacks towards any given client after clear-text credentials have
been captured from this client. To continue attacking no matter what, this can be disabled with the
--nonstop option (very intrusive++).
Getting started
Example usage:
sudo python downauth.py --iface eth0 --levels 1,2 192.168.1.0/24

Options:
positional arguments:
<target> Comma-sparated list of target IP addresses or CIDR networks
optional arguments:
-h, --help show this help message and exit
--router <router> Local network gateway (default: autodetect)
--iface <iface> Network interface card to use (default: eth0)
--nofw Do not auto-configure routing and iptables rules (default: false)
--freq <freq> ARP poison packets frequency in seconds (default: 5)
--ports <ports> Comma seperated list of ports to intercept (default: 80)
--proxy <proxy> External proxy to forward clients' traffic to (format: ip:port)
--nonstop Continue attacking clients after capturing credentials (default: false) --levels <levels> Comma separated list of attack levels. See above for description (default: 1)
--verbose Enable verbose output

Todo
  • Implement attack level 3
  • Rewrite client auth response to NTLM or Negociate when required.
About
Downgrade HTTP authentication on the network to capture clear-text credentials from clients
Resources
Readme
Activity
Stars
19 stars
Watchers
3 watching
Forks
4 forks
Report repository
Releases
Packages
Contributors
Languages