Worm:Win32/Yuner.A removal guide

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: 73D253852860FC879FD6.mlw
path: /opt/CAPEv2/storage/binaries/d961bd2a63ae9e13189f7a0f8b35285b5409ee82cbbed029ca0ea6bfd8e61d4c
crc32: F731A8A5
md5: 73d253852860fc879fd61da8e9217937
sha1: fef72ee742e37f9f66eb614192cb78034e5d8891
sha256: d961bd2a63ae9e13189f7a0f8b35285b5409ee82cbbed029ca0ea6bfd8e61d4c
sha512: 2683a2b68f28478304ea5b985d3f668e3a7b8c06da3f344ac0ffcda114d20e3c1e2759506daa8826ff5e01c793dc5f52c460ae266692a389b1a49e4bbcef96f4
ssdeep: 3072:MMDb50WrZa8jCgae5+VQkGdUQFDxePZ2SBaQJXkNRtXlNGKaUIQW/qlQBG3mmTJn:1xlZam+akqx6YQJXcNlEHUIQeE3mmBIQ
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T10D4413C2A6D95AE5ECC619771A23DFC41F56FE3169C60A10BA04B16F49F73C0AA13323
sha3_384: f19f61122769b26cec12d3b2689e363d1a002d7effe2dd10efa21dad7f1356c1933d30da49db650012e6d78c989d79e7
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.