The developers of open source video transcoder app Handbrake have issued a security warning to Mac users after a mirror download server hosting the software was hacked.
The alert was issued on Saturday after it was discovered that the original HandBrake-1.0.7.dmg installer file on mirror server download.handbrake.fr had been replaced by a malicious file.
The affected server has been shut down for investigation, but developers are warning that users who downloaded the software from the server between 14:30 UTC May 2 and 11:00 UTC May 6 have a 50/50 chance of their system being infected by a trojan. 'If you see a process called 'Activity_agent' in the OS X Activity Monitor application, you are infected,' read the alert.
To remove the malware from an infected computer, users need to open up the Terminal application and run the following commands:
The malware in question is a new variant of OSX.PROTON, a Mac-based remote access trojan that gives the attacker root-access privileges. Apple updated its macOS security software XProtect in February to defend against the original Proton malware. Apple initiated the process to update its XProtect definitions on Saturday and the update should already be rolling out to machines silently and automatically.
Handbrake users should note that the primary download mirror and the Handbrake website were unaffected by the hack. Downloads via the application's built-in updater with 1.0 and later are also unaffected, since these are verified by a DSA Signature and won't install if they don't pass. However, users with Handbrake 0.10.5 and earlier who used the application's built-in updater should check their system, as these versions don't have the verification feature.
For reference, HandBrake.dmg files with the following checksums are infected:
SHA1: 0935a43ca90c6c419a49e4f8f1d75e68cd70b274 / SHA256: 013623e5e50449bbdf6943549d8224a122aa6c42bd3300a1bd2b743b01ae6793
(Thanks, Alfonso!)
The alert was issued on Saturday after it was discovered that the original HandBrake-1.0.7.dmg installer file on mirror server download.handbrake.fr had been replaced by a malicious file.
The affected server has been shut down for investigation, but developers are warning that users who downloaded the software from the server between 14:30 UTC May 2 and 11:00 UTC May 6 have a 50/50 chance of their system being infected by a trojan. 'If you see a process called 'Activity_agent' in the OS X Activity Monitor application, you are infected,' read the alert.
To remove the malware from an infected computer, users need to open up the Terminal application and run the following commands:
- Last week, crooks hacked one of the HandBrake app's download servers and used the popular video app to distribute Mac spyware.
- Read: Mac Malware: OSX/Dok Bypasses Apple Security, Steals Internet Activity The makers of HandBrake said anyone who downloaded the app for Mac from 10:30 a.m. EDT last Tuesday until 7 p.m.
Developers of the HandBrake DVD-ripping app have issued a warning that attackers inserted malware into copies of the app on one of its download mirror servers. They have shut that server down, but if you downloaded HandBrake between 14:30 UTC 2 May 2017 and 11:00 UTC 6 May 2017, you may have been infected.
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- launchctl unload ~/Library/LaunchAgents/fr.handbrake.activity_agent.plist
- rm -rf ~/Library/RenderFiles/activity_agent.app
- if ~/Library/VideoFrameworks/ contains proton.zip, remove the folder
The malware in question is a new variant of OSX.PROTON, a Mac-based remote access trojan that gives the attacker root-access privileges. Apple updated its macOS security software XProtect in February to defend against the original Proton malware. Apple initiated the process to update its XProtect definitions on Saturday and the update should already be rolling out to machines silently and automatically.
Handbrake users should note that the primary download mirror and the Handbrake website were unaffected by the hack. Downloads via the application's built-in updater with 1.0 and later are also unaffected, since these are verified by a DSA Signature and won't install if they don't pass. However, users with Handbrake 0.10.5 and earlier who used the application's built-in updater should check their system, as these versions don't have the verification feature.
For reference, HandBrake.dmg files with the following checksums are infected:
SHA1: 0935a43ca90c6c419a49e4f8f1d75e68cd70b274 / SHA256: 013623e5e50449bbdf6943549d8224a122aa6c42bd3300a1bd2b743b01ae6793
(Thanks, Alfonso!)
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