The Worst Anti-Cheat Ever

TL;DR

Ricochet’s criticized detection relied on signature scanning of live memory for specific cheat-related text strings, including “triggerbot.”

Briefing Cornell Notes

Briefing

Call of Duty’s Ricochet anti-cheat was thrown into crisis after an exploit was described that could trigger permanent bans simply by having certain text strings appear in a player’s in-game memory. The core mechanism wasn’t a sophisticated bypass of detection logic—it was a signature-scanning approach that flagged the presence of a specific phrase associated with a common cheat menu option (“triggerbot”). Because Ricochet scans live memory for those signatures, ordinary gameplay data—like player names, friend-request names, and chat messages—can inadvertently contain the trigger phrase and get swept into the ban net.

The exploit’s abuse path is straightforward: send a friend request or message containing the targeted string, or otherwise ensure the phrase lands in the recipient’s memory during a match. Since lobby player names and chat content are already present in memory while the game runs, the detection can misfire even when the recipient isn’t cheating. The transcript notes that this wasn’t limited to chat—player identifiers and social interactions can also be scanned—making it possible to ban “random” accounts at scale. A claim is made that thousands of Call of Duty players were banned before major streamers were targeted, after which Ricochet reportedly disabled the ban behavior and investigated.

A key technical criticism centers on how the signatures were constructed. Signature scanning is a known technique in anti-cheat and antivirus systems, but it requires careful engineering so that the signature is specific to the cheat’s loaded code—not just any coincidental text that could appear in normal data. The discussion highlights Ricochet’s use of plain-text/ASCII-style strings and multi-string patterns as signatures. That choice is portrayed as a major oversight: any compiled code or data that happens to contain functionally similar content can raise a detection flag, and even accidental matches can occur.

The fallout quickly became as much about accountability as about detection logic. Activision’s response, quoted in the transcript, says Ricochet identified and disabled a workaround that detected the detection system in Modern Warfare 3 and Call of Duty Warzone, then restored accounts impacted by the workaround. The statement frames the issue as affecting a “small number” of legitimate players, while the transcript’s participants argue the underlying design allowed negligence—scanning too broadly and banning too aggressively based on strings that can appear in non-cheating contexts.

Accounts were reportedly being unbanned, with a caveat that players caught using the relevant strings as part of real cheating would remain penalized. Still, the episode underscores a broader security lesson: anti-cheat systems that can produce false positives at scale—especially permanent bans—create a vulnerability not just for cheaters, but for anyone caught in the blast radius of overly permissive detection rules. The transcript ends with calls for safer detection practices, review workflows for flagged accounts, and a general push for more robust engineering rather than shortcuts that trade accuracy for speed.

Cornell Notes

Ricochet’s signature-scanning approach was criticized after an exploit allegedly caused permanent bans by matching a cheat-related text string (“triggerbot”) in a player’s in-game memory. The detection logic appears to treat the presence of that phrase as sufficient evidence, even though normal gameplay data (chat messages, friend-request names, and lobby player names) can contain the same text. Because those strings can land in memory without any cheating, the system can misfire and punish legitimate players. The transcript claims thousands of accounts were affected before Ricochet disabled the problematic behavior and began restoring accounts, while cheaters using the strings would still be unbanned. The episode highlights how overly broad string-based signatures and lack of false-positive safeguards can turn anti-cheat into a self-inflicted denial-of-service.

How does signature scanning work in anti-cheat, and why does it matter for false positives?

Signature scanning looks for known “footprints” of cheat software in a running process’s memory. The ideal signature is specific to the cheat’s loaded code—present when the cheat is active and absent otherwise. If the signature is too generic (for example, a plain-text phrase that can appear in normal data), the anti-cheat can flag legitimate players who never loaded the cheat.

Why can a chat message or friend request lead to a ban if the detection is memory-based?

In-game chat content and player identifiers are stored in memory while matches run. If Ricochet scans memory for a targeted phrase, then sending a message or friend request containing that phrase can cause it to appear in the recipient’s memory. The transcript emphasizes that the recipient doesn’t need to be cheating—only needs the string to be present in memory during scanning.

What specific design choice drew the most criticism: scanning for strings or the way signatures were built?

The transcript’s strongest critique targets the signature construction—using plain-text/ASCII-style strings (and multi-string patterns) as detection triggers. The argument is that strings are easy to match accidentally: binary data can be represented as text, and normal gameplay strings (names, messages) can contain the same characters. That makes instantaneous, permanent bans based on string presence especially risky.

What does the Call of Duty response claim, and how does it differ from the transcript’s concerns?

The quoted response says Ricochet identified and disabled a workaround that detected the detection system in Modern Warfare 3 and Call of Duty Warzone, restored accounts impacted by the workaround, and will continue safety monitoring. The transcript participants counter that the real problem is negligence in detection design—banning legitimate players due to overly permissive scanning—rather than merely reacting to a workaround.

Why is permanent banning viewed as particularly harmful in this scenario?

Permanent bans amplify the damage from false positives. If a detection rule can be triggered by ordinary in-game text, then a large number of legitimate accounts can be punished quickly. The transcript argues that a safer approach would minimally flag accounts for review rather than immediately applying irreversible penalties.

Review Questions

What conditions must be true for a signature-scanning anti-cheat to avoid false positives, and how did the criticized approach fail that standard?
Explain how a targeted phrase could appear in memory without any cheating, and why that would still trigger a string-based signature scan.
What tradeoff does the transcript suggest between detection speed/simplicity and security reliability, and what mitigation steps were proposed?

Key Points

1
Ricochet’s criticized detection relied on signature scanning of live memory for specific cheat-related text strings, including “triggerbot.”
2
Normal gameplay data—chat messages, friend-request names, and lobby player names—can contain the same phrase and still be present in memory during scanning.
3
The exploit’s abuse allegedly involved sending messages or friend requests containing the trigger phrase to cause bans in recipients who weren’t cheating.
4
Participants argued the signature design was overly permissive because plain-text/ASCII-style string matching can produce accidental matches.
5
The transcript claims Ricochet disabled the ban behavior and began restoring accounts after major targeting drew attention.
6
Activision’s response framed the issue as a workaround affecting a small number of legitimate accounts, while critics focused on negligence and lack of false-positive safeguards.
7
The episode reinforces that anti-cheat systems must minimize false positives and use review workflows rather than immediate permanent bans when detection confidence is uncertain.

Highlights

A permanent-ban exploit was described as relying on a simple string match: if “triggerbot” appeared in a player’s in-game memory, Ricochet could flag the account.

Because chat, friend requests, and player names live in memory during matches, the phrase could be introduced without any cheating at all.

Critics singled out string-based signatures—plain-text/ASCII patterns—as a design choice that makes accidental matches and mass false positives more likely.

Activision said affected accounts were restored after Ricochet disabled the problematic behavior, but critics argued the underlying detection logic still showed negligence.

Topics

Anti-Cheat
Ricochet
Signature Scanning
False Positives
Call of Duty Warzone

Mentioned

Call of Duty
Ricochet
Modern Warfare 3
Call of Duty Warzone