threatfabric2 articles
Hirudo Android Trojan Swaps Out Your Banking App From the Inside
Hirudo is a sophisticated Android banking trojan that combines remote access capabilities with an unusual tactic: it detects legitimate banking apps on a victim's device, uninstalls them, and replaces them with trojanized copies that neutralize security checks from within the app itself. Delivered via convincing dropper apps promoted on social media, it currently targets eight Indonesian banking apps and can steal credentials, provide live remote device control, and collect SMS messages. Security researchers at ThreatFabric warn that this approach — moving tampering inside the target app rather than attacking the device externally — represents a significant escalation, and advise financial institutions to enforce integrity checks server-side and rely on layered behavioral analytics rather than trusting signals generated locally on the device.
Hirudo Trojan Swaps Out Your Banking App With a Fake One That Passes Its Own Security Checks
Hirudo is a newly identified Android banking trojan that replaces legitimate banking apps with tampered versions engineered to bypass the apps' own internal security checks, including signature verification, accessibility detection, and Play Integrity. Delivered through dropper apps disguised as shopping, entertainment, or adult video platforms — and promoted via fake Google Play pages advertised on Meta platforms — the malware targets banking users across Indonesia, China, India, Mexico, Morocco, and Thailand. Security firm ThreatFabric warns that Hirudo's approach of moving tampering *inside* target apps means locally generated security signals can no longer be trusted and must be verified server-side.