What is “Worm:Win32/Yuner.A”?

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
• Uses Windows utilities for basic functionality
• 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: 9D57822EA8EB9AA65C0C.mlw
path: /opt/CAPEv2/storage/binaries/4a102c51259c3f4a76d233a572c6fe968cc938d9d89aa66f32d792e8af24b73d
crc32: 5AD5109A
md5: 9d57822ea8eb9aa65c0c30c88323a2fb
sha1: e173086d906e358ddddc8160b3b14b0163dcf977
sha256: 4a102c51259c3f4a76d233a572c6fe968cc938d9d89aa66f32d792e8af24b73d
sha512: 003648e3eab2cd78b123635a5378dda76c1f38db51e48910beaf481139842de8e01cf8160916c419eca3011852f0615e53d7894f51a76455cbe3bc47090c1f8f
ssdeep: 3072:MMDb50WrZa8jCgae5+VQkGdUQFDxePZ2SBaQJXkNRtXlNGKaUIQW/qlQBG3mmTJq:1xlZam+akqx6YQJXcNlEHUIQeE3mmBIJ
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1874412C2A6D95BF5ECC619771A23DF841F56FE3169C60A10BA04B16F49F7381AA13323
sha3_384: f8bf692897b969195b058398dd7ed124812d630d86ac9b726b461d85aca21544db93a5a0ff6196027946726675e525d7
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.