Ledger Connect Kit

Malicious Code Injection Attack

Estimated loss

$600.0K

VERDICT —OUT OF SCOPE

Root cause is phishing — victims signed malicious transactions or approvals off-protocol. Contract logic was not the failure surface; user-side wallet hygiene was. Pre-deployment audit cannot catch this class.

▰ METHOD

PHISHING

Root cause

Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.

Forensic narrative

the Ledger Connect Kit suffered a supply chain attack, with attackers stealing at least $600,000. The SlowMist security team immediately initiated an analysis of the relevant code and discovered that the attackers implanted malicious JavaScript code in versions @ledgerhq/connect-kit=1.1.5/1.1.6/1.1.7. They directly replaced the normal window logic with a Drainer class, triggering not only a fake DrainerPopup popup but also handling the transfer logic for various assets. Attackers launched phishing attacks against cryptocurrency users through CDN. Attack method (per SlowMist): Malicious Code Injection Attack. Reported loss: $ 600,000.

Primary source

https://twitter.com/SlowMist_Team/status/1735299228866613465 ↗

Sourced from

slowmist

Technical record