About “Worm:Win32/Yuner.A” infection

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
• 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: A96B05EBE4B79C7CBEED.mlw
path: /opt/CAPEv2/storage/binaries/9f38dc1968684d02ff42e7d51dcfd013789a22f77c6c98d9f20cbbffa9eb135e
crc32: C0E58E9D
md5: a96b05ebe4b79c7cbeeddbef577e2e8a
sha1: 7a55531388ced828dbeccafc92073a8165586003
sha256: 9f38dc1968684d02ff42e7d51dcfd013789a22f77c6c98d9f20cbbffa9eb135e
sha512: 1eaf27b217046178f2faef996ce56dd286d024f2a5eaf8027514852074ca6ea15ed181accd51ca1d4ed48748db648ad6998a3c0f49550aeed5b771b7ca052f7e
ssdeep: 3072:MMDb50WrZa8jCgae5+VQkGdUQFDxePZ2SBaQJXkNRtXlNGKaUIQW/qlQBG3mmTJE:1xlZam+akqx6YQJXcNlEHUIQeE3mmBIN
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T17D4413C2A6D95AE6ECC619771A23DFC41F55FE3169C60A10BA04B16F49F73C19A13323
sha3_384: 143e6996227255faf7169daa36431989a1fc5bf1794d1dfbec9d087b91941876dad9fabf6dd85c4848b028a3e8e6990c
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.