Cyber Risks · Krebs on Security

Inside a Modern Mac Trojan

Summary: F-Secure analyzed Trojan-Dropper:OSX/Revir.A, a Mach-O binary that extracts a decoy PDF and a second binary into the Mac's /tmp directory, which then downloads a third binary that installs a backdoor. The backdoor copies itself to /users/%user%/library/LaunchAgents/checkvir with a matching .plist launch point so it persists after reboot, all without the user entering a password.

Why it matters: The malware runs entirely in the user's home directory and /tmp, so it never triggers the admin password prompt Mac users rely on as their proof that nothing can install without consent.

Read the original at Krebs on Security ↗

Topics
Malware
Related