Service Example

Jump to bottomEditNew page
Sebastiano Mariani edited this page Mar 31, 2020 · 2 revisions

Service Example

For this example we are walking through the following challenge:

The service implements a simple calculator that solves a user-provided formula. Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).

The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):

name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag

To store the flag in the service (setflag.py), the Scriptbot performs the following actions:

simplecalc_1

  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script

To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:

simplecicle_2

Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.

simplecalc_3

Add a custom footer
Add a custom sidebar

Clone this wiki locally

, '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" + '

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally

, '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('^' + ".*" + '

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally

, '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('^' + ".*" + '

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally

, '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" + '

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally

, '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('^' + ".*" + '

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally

, '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('^' + ".*" + '

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally

, '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); }
})();
})();

Skip to content
Service Example
Jump to bottomEditNew page

Sebastiano Mariani edited this page Mar 31, 2020
·
2 revisions
Service Example
For this example we are walking through the following challenge:
The service implements a simple calculator that solves a user-provided formula.
Once connected, the program asks the user for a username, a password and a title. After that, the program will ask the user for the formula to solve and eventually the submitted title and the result of the computation are stored inside a file named {username}_{password}.txt (username and password corresponds to the parameters provided during the interaction).
The scriptbot uses the following mapping between values for the service (username, password, title) and values for the iCTF framework (flag_id, secret_token, flag):
name in servicename for ictf
usernameflag_id
passwordsecret_token
titleflag
To store the flag in the service (setflag.py), the Scriptbot performs the following actions:
simplecalc_1
  1. the scriptbot communicates to our infrastructure that it is going to update the username/flag_id, the password/flag and the title/secret_token for the simple_calc service
  2. the scriptbot interacts with the simple_calc challenge, using the set_flag.py script, to set the new title/flag and username/flag_id
  3. the simple_calc service stores the file with the parameters provided by the setflag script
To retrieve the stored flag (getflag.py), the Scriptbot uses the service's "retrieve" functionality to cat the file corresponding to the given username/flag_id. To do this, the scriptbot must provide the password/secret_token, which is known only to the Scriptbot:
simplecicle_2
Since the teams don't know the password/secret_token, they can't simply cat the saved results (which contain the title/flag) through the retrieve functionality. To get the flag, they have to hack the service.
simplecalc_3
 Add a custom footer

 Add a custom sidebar

Clone this wiki locally