Worm:Win32/Yuner.A (file analysis)

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.

Gridinsoft Anti-Malware

Removing PC viruses manually may take hours and may damage your PC in the process. We recommend using GridinSoft Anti-Malware for virus removal. Allows to complete scan and cure your PC during the trial period.

DOWNLOAD NOW

6-day free trial available.

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: C27D4691848D95DB1D8D.mlw
path: /opt/CAPEv2/storage/binaries/4442291497eefd0bb833972f7786d5a7d69fe972d8b97d312fcc6398d3db52af
crc32: 5E508092
md5: c27d4691848d95db1d8df314b2952de8
sha1: 066d445fd3b359a5f880728d388fbc95458ea721
sha256: 4442291497eefd0bb833972f7786d5a7d69fe972d8b97d312fcc6398d3db52af
sha512: 4631da854d1b8632605d263373e04fec7fee3120ab0492b299b4913e924a2bc08a76beb2759c93b7d4938d853cc2b224075cec50404e5e2c553cd99f0bdf8ccf
ssdeep: 3072:MMDb50WrZa8jCgae5+VQkGdUQFDxePZ2SBaQJXkNRtXlNGKaUIQW/qlQBG3mmTJy:1xlZam+akqx6YQJXcNlEHUIQeE3mmBIF
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1B44413C2A6D95AE6ECC619771A23DFC41F55FE3169C60A10BA04B16F49F73C1AA13323
sha3_384: 655f69c474711c7506b73c3612c3140b81e8fb38880506ae2534efc5e5805f6288b6861e82883e68db90d66544cbbfaa
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.