What is “Worm.Win32.AutoRun.efi”?

The Worm.Win32.AutoRun.efi is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

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What Worm.Win32.AutoRun.efi virus can do?

• Behavioural detection: Executable code extraction – unpacking
• SetUnhandledExceptionFilter detected (possible anti-debug)
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Dynamic (imported) function loading detected
• CAPE extracted potentially suspicious content
• The binary likely contains encrypted or compressed data.
• Creates an autorun.inf file
• Authenticode signature is invalid
• Uses Windows utilities for basic functionality
• Attempts to restart the guest VM
• Installs itself for autorun at Windows startup
• Disables host Context Menu in Taskbar and Start
• Attempts to disable or modify Explorer Folder Options
• Disables host Power options (shutdown, logoff, lock, change password)
• Attempts to disable or modify the Run command from the Start menu and the New Task (Run) command from Task Manager
• Attempts to disable System Restore
• Attempts to modify or disable Security Center warnings
• Creates a known Scarab-Dharma ransomware decryption instruction / key file.
• Anomalous binary characteristics
• Attempts to modify Explorer settings to prevent file extensions from being displayed
• Attempts to modify Explorer settings to prevent hidden files from being displayed
• Uses suspicious command line tools or Windows utilities

How to determine Worm.Win32.AutoRun.efi?

File Info:
name: 6FCF65CC4A4E9942656C.mlw
path: /opt/CAPEv2/storage/binaries/a220b0db272c2602fb710606b0424e07bf0daf6d53e6dee9c0bc63e55de1cc4a
crc32: 33D0FE0B
md5: 6fcf65cc4a4e9942656c489408bbcd4f
sha1: 31aa4593eae431a49c665471a7572fd25ebc366a
sha256: a220b0db272c2602fb710606b0424e07bf0daf6d53e6dee9c0bc63e55de1cc4a
sha512: a5aab20da48c0ee44584418239dd01368fcd2290c4ce6207ad421a45c5011bd405e37d38f342de6e73b6c82efb5cbc71362f9ca87e1e1dfd944a0af8d835a9aa
ssdeep: 98304:guYYYYRYYYYRYYYYRYYYYUuYYYYRYYYYRYYYYRYYYYMuYYYYRYYYYRYYYYRYYYYp:9
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1CB26CE4376238419F6A4C83D8D02466D82863F328D177CAB61993F7B3E3A0D76E56772
sha3_384: 6499b78b94b51eccd7ff8edb263df007b694d6f9db22a62271bccda79f93983daf70a1473e176421331849bf29764698
ep_bytes: b840b846005064ff3500000000648925
timestamp: 2008-05-16 04:00:12

Version Info:
Translation: 0x0409 0x04b0
ProductName: BlackHole
FileVersion: 0.00
ProductVersion: 0.00
InternalName: BlackHole
OriginalFilename: BlackHole.exe

Worm.Win32.AutoRun.efi also known as:

How to remove Worm.Win32.AutoRun.efi?

• Download and install GridinSoft Anti-Malware.
• Open GridinSoft Anti-Malware and perform a “Standard scan“.
• “Move to quarantine” all items.
• Open “Tools” tab – Press “Reset Browser Settings“.
• Select proper browser and options – Click “Reset”.
• Restart your computer.