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<meta name="description" property="og:description" content="Deciduous is a decision tree generator that simplifies modeling adverse scenarios for engineering teams who want to understand their systems' resilience to failure">
<meta name="author" content="Ryan Petrich, Kelly Shortridge">
<meta property="og:description" content="Deciduous is a decision tree generator that simplifies modeling adverse scenarios for engineering teams who want to understand their systems' resilience to failure" />
<meta property="og:title" content="Deciduous - Decision Tree Generator" />
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<title>Deciduous - Decision Tree Generator</title>
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title: (Example) Attack Tree for S3 Bucket with Video Recordings
facts:
- wayback: API cache (e.g. Wayback Machine)
from:
- reality: '#yolosec'
- public_bucket: S3 bucket set to public
from:
- bucket_search: '#yolosec'
- subsystem_with_access: Subsystem with access to bucket data
from:
- compromise_user_creds
attacks:
- bucket_search: AWS public buckets search
from:
- disallow_crawling
- brute_force:
from:
- private_bucket
- phishing:
from:
- private_bucket
- internal_only_bucket:
backwards: true
- access_control_server_side:
backwards: true
- compromise_user_creds: Compromise user credentials
from:
- brute_force
- phishing
- analyze_web_client: Manually analyze web client for access control misconfig
from:
- lock_down_acls
- compromise_admin_creds: Compromise admin creds
from:
- phishing
- compromise_aws_creds: Compromise AWS admin creds
from:
- phishing
- intercept_2fa: Intercept 2FA
from:
- 2fa
- ssh_to_public_machine: SSH to an accessible machine
from:
- compromise_admin_creds: '#yolosec'
- compromise_aws_creds:
- intercept_2fa
- lateral_movement_to_machine_with_access: Lateral movement to machine with access to target bucket
from:
- ip_allowlist_for_ssh
- compromise_presigned: Compromise presigned URLs
from:
- phishing
- compromise_quickly: Compromise URL within N time period
from:
- short_lived_presigning
- recon_on_s3: Recon on S3 buckets
from:
- private_bucket
- disallow_bucket_urls:
backwards: true
- 2fa:
backwards: true
- find_systems_with_access: Find systems with R/W access to target bucket
from:
- recon_on_s3: '#yolosec'
- exploit_known_vulns: Exploit known 3rd party library vulns
from:
- find_systems_with_access
- buy_0day:
from:
- vuln_scanning
- discover_0day: Manual discovery of 0day
from:
- vuln_scanning
- exploit_vulns: Exploit vulns
from:
- buy_0day
- discover_0day
- aws_0day: 0day in AWS multitenant systems
from:
- ips
- supply_chain_backdoor: Supply chain compromise (backdoor)
from:
- single_tenant_hsm
mitigations:
- disallow_crawling: Disallow crawling on site maps
from:
- reality
- private_bucket: Auth required / ACLs (private bucket)
from:
- reality
- lock_down_acls: Lock down web client with creds / ACLs
from:
- subsystem_with_access
- access_control_server_side: Perform all access control server side
from:
- analyze_web_client
- 2fa: 2FA
from:
- compromise_admin_creds: '#yolosec'
- compromise_aws_creds
- ip_allowlist_for_ssh: IP allowlist for SSH
from:
- ssh_to_public_machine
- short_lived_presigning: Make URL short lived
from:
- compromise_presigned
- disallow_bucket_urls: Disallow the use of URLs to access buckets
from:
- compromise_quickly
- vuln_scanning: 3rd party library checking / vuln scanning
from:
- exploit_known_vulns
- ips: Exploit prevention / detection
from:
- exploit_vulns
- single_tenant_hsm: Use single tenant AWS HSM
from:
- aws_0day:
implemented: false
- internal_only_bucket: No public system has R/W access (internal only)
from:
- find_systems_with_access
goals:
- s3_asset: Access video recordings in S3 bucket (attackers win)
from:
- wayback: '#yolosec'
- public_bucket
- subsystem_with_access
- analyze_web_client
- lateral_movement_to_machine_with_access
- compromise_presigned
- compromise_quickly
- exploit_vulns
- aws_0day
- supply_chain_backdoor
- company_bank_account: Access company bank account
from:
- intercept_2fa
# filter can be used to show only paths that flow through specific nodes
filter:
- s3_asset
</textarea>
<pre id="highlighting" aria-hidden="true"><code id="inputHighlighted"></code></pre>
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<label for="themePicker">Theme: </label><select id="themePicker"></select>
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<a href="#" id="downloadHoverArea" class="dropdownHoverArea">Download</a>
<ul>
<li><a id="downloadLink" download="decision-tree.dot">Graphviz DOT Format</a></li>
<li><a id="downloadYAMLLink" download="decision-tree.yaml">YAML Format</a></li>
<li><a id="downloadSvgLink" download="decision-tree.svg">SVG Image</a></li>
<li><a id="downloadPngLink" href="#" download="decision-tree.png">PNG Image</a></li>
</ul>
</div>
<div id="importWrapper" class="dropdownWrapper">
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<ul>
<li><a id="openGistLink" href="#">From GitHub Gist</a></li>
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<a href="https://github.com/rpetrich/deciduous#deciduous">GitHub Repo</a>
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const openLocalFileLink = document.getElementById("openLocalFileLink");
const inputHighlighted = document.getElementById("inputHighlighted");
const highlighting = document.getElementById("highlighting");
function syncScroll() {
highlighting.scrollTop = inputSource.scrollTop;
highlighting.scrollLeft = inputSource.scrollLeft;
}
window["@hpcc-js/wasm"].graphvizSync().then(graphviz => {
let lastInput = "";
let lastObjectURL = "";
let lastYAMLObjectURL = "";
let lastSvgObjectURL = "";
let lastPngObjectURL = "";
let types = {};
let themeName = "default";
function selectRange(start, end) {
inputSource.blur();
inputSource.selectionEnd = inputSource.selectionStart = start;
inputSource.focus();
inputSource.selectionEnd = end;
syncScroll();
setTimeout(syncScroll, 0);
}
const themePicker = document.getElementById("themePicker");
function rerender() {
syncScroll();
const newInput = inputSource.value;
if (newInput != lastInput) {
lastInput = newInput;
if (window.localStorage) {
localStorage.setItem("deciduous-content", newInput);
}
function updateTextArea(){
types["attacks"] = "attacks";
types["mitigations"] = "mitigations";
types["goals"] = "goals";
types["facts"] = "facts";
types["reality"] = "facts";
let current = "";
let i = 0;
const childNodes = inputHighlighted.childNodes;
function insertTextNode(text) {
if (i < childNodes.length) {
const node = childNodes[i];
if (node.nodeType === Node.TEXT_NODE) {
if (node.textContent !== text) {
node.textContent = text;
}
} else {
inputHighlighted.replaceChild(document.createTextNode(text), node);
}
} else {
inputHighlighted.appendChild(document.createTextNode(text));
}
i++;
}
function insertSpan(text, className) {
if (i < childNodes.length) {
const node = childNodes[i];
if (node.nodeType === Node.ELEMENT_NODE) {
if (node.textContent !== text) {
node.textContent = text;
}
if (node.className !== className) {
node.className = className
}
} else {
const span = document.createElement("span");
span.className = className;
span.textContent = text;
inputHighlighted.replaceChild(span, node);
}
} else {
const span = document.createElement("span");
span.className = className;
span.textContent = text;
inputHighlighted.appendChild(span);
}
i++;
}
let inComment = false;
for (const token of (newInput[newInput.length-1] == "\n" ? newInput + " " : newInput).split(/\b/)) {
if (Object.hasOwnProperty.call(types, token) && !inComment) {
insertTextNode(current);
current = "";
insertSpan(token, types[token]);
} else {
if (/#/.test(token)) {
inComment = true;
} else if (/^/.test(token)) {
inComment = false;
}
current += token;
}
}
insertTextNode(current);
while (i < childNodes.length) {
inputHighlighted.removeChild(childNodes[i]);
}
// Resync line height
const highlightedHeight = inputHighlighted.getBoundingClientRect().height;
const inputHeight = inputSource.scrollHeight;
if (highlightedHeight > inputHeight) {
// line height hack for Firefox+Windows
inputSource.style.lineHeight = highlightedHeight*20.01/(inputHeight-40) + "px";
}
}
try {
let dot, title;
const parsed = jsyaml.load(newInput);
({ dot, title, types, themeName } = convertToDot(parsed));
dark = themes[themeName].dark;
themePicker.value = themeName;
// Syntax highlighting
updateTextArea();
// console.log(dot);
// Render SVG into the document
document.title = `Deciduous - Decision Tree Generator (${title})`;
updateDocumentClasses();
if (window.localStorage) {
window.localStorage.setItem("deciduous-dark", dark);
}
const svg = graphviz.layout(dot, "svg", "dot");
renderTarget.innerHTML = svg;
const svgElement = renderTarget.querySelector("svg");
if (svgElement) {
const scale = 0.75;
svgElement.setAttribute("width", parseInt(svgElement.getAttribute("width"), 10) * scale + "pt");
svgElement.setAttribute("height", parseInt(svgElement.getAttribute("height"), 10) * scale + "pt");
};
// Create a download link
if (window.File && URL.createObjectURL) {
const file = new File([embedDotComment(dot, newInput)], "graph.dot", {
"type": "text/vnd.graphviz",
});
downloadLink.download = title + ".dot";
const newObjectURL = URL.createObjectURL(file);
downloadLink.href = newObjectURL;
if (lastObjectURL != "") {
URL.revokeObjectURL(lastObjectURL);
}
lastObjectURL = newObjectURL;
const svgFile = new File([embedSvgComment(svg, newInput)], "graph.svg", {
"type": "image/svg+xml",
});
downloadSvgLink.download = title + ".svg";
const newSvgObjectURL = URL.createObjectURL(svgFile);
downloadSvgLink.href = newSvgObjectURL;
if (lastSvgObjectURL != "") {
URL.revokeObjectURL(lastSvgObjectURL);
}
lastSvgObjectURL = newSvgObjectURL;
downloadPngLink.download = title + ".png";
if (lastPngObjectURL != "") {
URL.revokeObjectURL(lastPngObjectURL);
lastPngObjectURL = "";
}
const yamlFile = new File([newInput], "graph.yaml", {
"type": "text/yaml",
});
downloadYAMLLink.download = title + ".yaml";
const newYAMLObjectURL = URL.createObjectURL(yamlFile)
downloadYAMLLink.href = newYAMLObjectURL;
if (lastObjectURL != "") {
URL.revokeObjectURL(lastYAMLObjectURL);
}
lastYAMLObjectURL = newYAMLObjectURL;
}
// Add quick linky links
for (const title of renderTarget.querySelectorAll("title")) {
title.parentNode.style.cursor = "pointer";
title.parentNode.addEventListener("click", () => {
const node = title.textContent;
const matches = node.match(/^(\w+)->(\w+)$/);
if (matches) {
// Select the appropriate "from entry" inside the target attack, mitigation or goal
const firstIndex = lastInput.indexOf("\n- " + matches[2]);
if (firstIndex != -1) {
let secondIndex = lastInput.indexOf("- " + matches[1], firstIndex + 4 + matches[2].length);
if (secondIndex != -1) {
changeEditingState(true);
selectRange(secondIndex + 2, secondIndex + 2 + matches[1].length);
}
}
} else {
// Select a top level attack, mitigation or goal
const index = lastInput.indexOf("\n- " + node);
if (index != -1) {
changeEditingState(true);
selectRange(index + 3, index + 3 + node.length);
}
}
}, false);
// Clone edge paths and make them thicker to make them easier to click
if (title.parentNode.getAttribute("class") === "edge") {
const path = title.parentNode.querySelector("path");
if (path) {
const thickPath = path.cloneNode(true);
thickPath.setAttribute("stroke", "transparent");
thickPath.setAttribute("stroke-width", "15px");
title.parentNode.insertBefore(thickPath, path);
}
}
}
// Clear any error text
errorTarget.innerText = "";
} catch (e) {
errorTarget.innerText = String(e);
updateTextArea();
}
}
}
rerenderFunction = rerender;
function changeEditingState(newState) {
editing = newState;
if (window.localStorage) {
window.localStorage.setItem("deciduous-editing", newState);
}
updateDivider();
updateDocumentClasses();
}
function rerenderAndClearHash() {
if (location.hash !== "") {
location.hash = "";
}
rerender();
}
inputSource.addEventListener("change", rerenderAndClearHash, false);
inputSource.addEventListener("input", rerenderAndClearHash, false);
inputSource.addEventListener("scroll", syncScroll, false);
inputSource.addEventListener("select", syncScroll, false);
inputSource.addEventListener("wheel", syncScroll, false);
inputSource.addEventListener("focus", syncScroll, false);
inputSource.addEventListener("blur", syncScroll, false);
let tabCompletionCandidates = [];
inputSource.addEventListener("keydown", (e) => {
// Tab support
const start = inputSource.selectionStart;
const end = inputSource.selectionEnd;
const beforeText = inputSource.value;
const newlineIndex = beforeText.lastIndexOf("\n", start - 1);
let nextNewlineIndex = beforeText.indexOf("\n", end - 1);
if (nextNewlineIndex === -1) {
nextNewlineIndex = beforeText.length;
}
const expandedSelection = beforeText.slice(newlineIndex + 1, nextNewlineIndex);
function applyExpandedSelection(replacement) {
selectRange(newlineIndex + 1, nextNewlineIndex);
document.execCommand(replacement ? "insertText" : "delete", false, replacement);
const expectedValue = beforeText.slice(0, newlineIndex + 1) + replacement + beforeText.slice(nextNewlineIndex);
if (inputSource.value != expectedValue) {
inputSource.value = expectedValue;
}
if (start !== end) {
selectRange(newlineIndex + 1, end - expandedSelection.length + replacement.length);
} else {
selectRange(start - expandedSelection.length + replacement.length, end - expandedSelection.length + replacement.length);
}
rerender();
syncScroll();
}
if (e.code === "Tab" && !e.metaKey && !e.ctrlKey && !e.altKey) {
e.preventDefault();
const start = inputSource.selectionStart;
const end = inputSource.selectionEnd;
const beforeText = inputSource.value;
let newline = beforeText.lastIndexOf("\n", start - 1);
if (e.shiftKey) {
// Unindent line two spaces
if (newline + 2 <= beforeText.length && beforeText.slice(newline + 1, newline + 3) === " ") {
applyExpandedSelection(expandedSelection.replace(/^ /gm, ""));
}
} else {
if (start === end) {
// Autocomplete
const beforeMatch = beforeText.slice(newline + 1, start).match(/\w+$/);
if (beforeMatch) {
const afterMatch = beforeText.slice(start).match(/^\w+/);
const afterMatchText = afterMatch ? afterMatch[0] : "";
let currentTabCompletionIndex = -1;
if (tabCompletionCandidates.length > 1) {
// Existing candidates
currentTabCompletionIndex = tabCompletionCandidates.indexOf(beforeMatch[0] + afterMatchText);
} else if (!afterMatch) {
// New candidates
tabCompletionCandidates = Object.keys(types).filter(key => key.startsWith(beforeMatch[0]) && key !== beforeMatch[0]);
} else {
// In middle of a word, skip tab completion
tabCompletionCandidates = [];
}
if (tabCompletionCandidates.length) {
const replacementText = tabCompletionCandidates[(currentTabCompletionIndex + 1) % tabCompletionCandidates.length];
const replacementStart = start - beforeMatch[0].length;
selectRange(replacementStart, end + afterMatchText.length);
document.execCommand("insertText", false, replacementText);
const expectedValue = beforeText.slice(0, replacementStart) + replacementText + beforeText.slice(end + afterMatchText.length);
if (inputSource.value != expectedValue) {
inputSource.value = expectedValue;
}
selectRange(replacementStart + replacementText.length, replacementStart + replacementText.length);
rerender();
return;
}
}
}
if (start === end) {
// Insert two spaces
document.execCommand("insertText", false, " ");
selectRange(start + 2, start + 2);
} else {
// Indent lines
applyExpandedSelection(expandedSelection.replace(/^/gm, " "));
}
}
rerender();
} else if ((e.metaKey ^ e.ctrlKey) && !e.altKey && !e.shiftKey) {
switch (e.key) {
case '[':
// Ctrl+[ to unindent line
if (newlineIndex + 2 <= beforeText.length && beforeText.slice(newlineIndex + 1, newlineIndex + 3) === " ") {
applyExpandedSelection(expandedSelection.replace(/^ /gm, ""));
}
break;
case ']':
// Ctrl+] to indent line
applyExpandedSelection(expandedSelection.replace(/^/gm, " "));
break;
case '/':
// Ctrl+/ to comment/uncomment line
let replacement;
if (expandedSelection.length >= 2 && expandedSelection.slice(0, 2) === "# ") {
// uncomment
applyExpandedSelection(expandedSelection.replace(/^\# /gm, ""));
} else {
// comment
applyExpandedSelection(expandedSelection.replace(/^(?!$)/gm, "# "));
}
break;
default:
syncScroll();
break;
}
} else {
syncScroll();
}
if (tabCompletionCandidates.length != 0) {
tabCompletionCandidates = [];
}
}, false);
document.body.addEventListener("keyup", syncScroll, false);
inputSource.addEventListener("dragover", (event) => {
event.preventDefault();
}, false);
function importText(text) {
const hiddenComment = parseEmbeddedComment(text);
inputSource.value = hiddenComment !== undefined ? hiddenComment : text;
rerender();
}
document.body.addEventListener("drop", (event) => {
event.preventDefault();
if (event.dataTransfer.items) {
for (const item of event.dataTransfer.items) {
if (item.kind === "file") {
item.getAsFile().text().then(importText);
break;
}
}
} else {
for (const file of event.dataTransfer.files) {
file.text().then(importText);
break;
}
}
}, false);
function tryHashRender() {
const match = location.hash.match(/^#gist=(\w+)$/);
if (match) {
const url = `https://api.github.com/gists/${match[1]}`;
inputSource.value = `# Loading ${url}`;
fetch(url).then(response => response.json()).then(json => {
const files = json.files;
for (const key in files) {
if (/\.yaml$/.test(key)) {
const file = files[key];
if (file.truncated) {
return fetch(file.raw_url).then(fileResponse => fileResponse.text());
} else {
return files[key].content;
}
}
}
for (const key in files) {
if (/\.(yaml|svg)$/.test(key)) {
const file = files[key];
if (file.truncated) {
return fetch(file.raw_url).then(fileResponse => fileResponse.text());
} else {
return files[key].content;
}
}
}
return `# No yaml in gist ID ${match[1]}`;
}).catch(e => `# Error loading ${url}: ${e}`).then(importText);
}
}
tryHashRender();
window.addEventListener("hashchange", tryHashRender, false);
// Themes
for (const key in themes) {
const option = document.createElement("option");
option.id = key;
option.innerText = key;
themePicker.appendChild(option);
}
themePicker.addEventListener("change", () => {
const match = lastInput.match(/^theme: \w+$/m);
let newValue;
if (match) {
newValue = lastInput.slice(0, match.index) + "theme: " + themePicker.value + lastInput.slice(match.index + match[0].length);
} else {
newValue = "theme: " + themePicker.value + "\n" + lastInput;
}
inputSource.value = newValue;
rerender();
});
rerender();
openGistLink.addEventListener("click", (event) => {
event.preventDefault();
const value = window.prompt("GitHub Gist URL or ID:", "");
if (/^[0-9a-f]+$/.test(value)) {
location.hash = `#gist=${value}`;
} else {
const match = value.match(/^https:\/\/gist\.github\.com\/\w+\/([0-9a-f]+)$/);
if (match) {
location.hash = `#gist=${match[1]}`;
} else {
return;
}
}
tryHashRender();
}, false);
openLocalFileLink.addEventListener("click", (event) => {
event.preventDefault();
const input = document.createElement("input");
input.type = "file";
input.accept = ".yaml,.svg,.dot,.png";
input.addEventListener("change", (event) => {
if (event.target.files.length != 0) {
const file = event.target.files[0];
const reader = new FileReader();
reader.readAsText(file, "UTF-8");