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- window.setTimeout = function(fn, delay, ...args) {
- return setTimeout(fn, 0, ...args);
- };
- window.requestIdleCallback = function(fn) {
- return fn({ didTimeout: false, timeRemaining: () => 50 });
- };
- đź”´ Implications:
- 1. Bypassing Delayed Execution
- Many scripts use setTimeout or requestIdleCallback to:
- Defer heavy computation
- Load analytics lazily
- Delay bot detection routines
- Time-based anti-debugging techniques
- Red team move:
- By neutering setTimeout and requestIdleCallback, you:
- Force all deferred logic to execute immediately
- Kill off scripts that rely on idle time
- Short-circuit bot-detection delays, revealing traps early
- 2. Neutralizing Sandboxing Traps
- Malicious or defensive pages sometimes use setTimeout to:
- Delay malicious behavior (so it’s missed by automated scanners)
- Delay environmental checks
- Stagger payload execution across call stacks
- Red team advantage:
- Forcing zero delay can:
- Flush payloads instantly
- Expose script layering
- Allow hooking and logging before obfuscation can kick in
- 3. Reconnaissance Automation
- If you’re writing a browser agent or doing DOM/script recon:
- Force all deferred UI logic to fire at once
- Skip spinner animations / dynamic delays
- Avoid unnecessary async behavior slowing down your inspection
- Basically: rip the timing behavior out of the browser, and now you’re dealing with a flat, static execution timeline.
- 4. Evading Time-Based Anti-Automation
- Some anti-bot scripts check how long between clicks/mouse moves:
- Did this load "too fast"?
- Did the human spend time reading?
- Are events being triggered "too perfectly"?
- By forcing timing to 0, you can:
- Test the boundaries of these systems
- Trigger false positives on purpose
- See if timing data is being used to fingerprint your presence
- Then you can flip it, simulate realistic delay only where it matters.
- ⚠️ Caveats (Read Like a Hacker, Think Like a Defender):
- This will break a LOT of normal UI logic on legitimate apps.
- If you're running this in a real browser with live session handling, you may trigger errors or flags by speeding things up too much.
- A sophisticated system might detect that setTimeout has been redefined (e.g. window.setTimeout.toString() looks off).
- Defensive JS might compare native functions via Function.prototype.toString or native code tags.
- 🛠️ Tactical Usage (Red Team Mode):
- Drop this override as a pre-script before page logic loads
- Pair it with proxy-based API traps to log original timing behavior
- Combine with a DOM snapshot before and after to compare what’s being hidden vs. revealed
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