Worm:Win32/Yuner.A removal instruction

The Worm:Win32/Yuner.A 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/Yuner.A virus can do?

• A file was accessed within the Public folder.
• Sample contains Overlay data
• Reads data out of its own binary image
• Drops a binary and executes it
• The binary contains an unknown PE section name indicative of packing
• The binary likely contains encrypted or compressed data.
• The executable is compressed using UPX
• Creates an autorun.inf file
• Authenticode signature is invalid
• Attempts to identify installed AV products by registry key
• Checks for the presence of known devices from debuggers and forensic tools
• Checks for the presence of known devices from debuggers and forensic tools
• Detects the presence of Windows Defender AV emulator via files
• Attempts to disable System Restore
• Attempts to disable Windows File Protection aka System File Checker.
• Touches a file containing cookies, possibly for information gathering
• Attempts to modify or disable Security Center warnings
• Attempts to modify Explorer settings to prevent file extensions from being displayed
• Attempts to modify Explorer settings to prevent hidden files from being displayed
• Yara detections observed in process dumps, payloads or dropped files

How to determine Worm:Win32/Yuner.A?

File Info:
name: 255EF4B397BC9DD9CA01.mlw
path: /opt/CAPEv2/storage/binaries/af940de597337504c52099cb4fd3ad0b353173d2b80bbace2fa2e0d374403ee1
crc32: 22C6E844
md5: 255ef4b397bc9dd9ca01e06c4cd1e1ef
sha1: b9d9680fd1ad92d78482134a137fc76328b8e026
sha256: af940de597337504c52099cb4fd3ad0b353173d2b80bbace2fa2e0d374403ee1
sha512: 9aa256b1f57b52125bb6b29c0d07f4f64a5a82c06d8428cf7cfd55aa7245d7701c19418f85aa03d670fb654470dd116acf0c11c0dc988b1101ca3c8b799cb190
ssdeep: 3072:MMDb50WrZa8jCgae5+VQkGdUQFDxePZ2SBaQJXkNRtXlNGKaUIQW/qlQBG3mmTJx:1xlZam+akqx6YQJXcNlEHUIQeE3mmBI+
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1E04413C2A6D95AE5ECC619771A23DFC41F56FE3169C60A10BA04B16F49F73C1AA13323
sha3_384: a8e94c706553bdd0d219c6a9177e69e5e5ddea7d06a2660e0cdd81c9c8ae7f2e951d12879e6b296cd1c71d1e9af25855
ep_bytes: 60be002046008dbe00f0f9ff57eb0b90
timestamp: 2007-09-10 14:57:50

Version Info:
FileDescription: 
Virus.Name.: ., ., ., .
Nuyer.........: ...... .. ...... : ., ., ., .
Translation: 0x0809 0x04b0

Worm:Win32/Yuner.A also known as:

How to remove Worm:Win32/Yuner.A?

• 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.