PUP.Optional.WebCompanion removal instruction

The PUP.Optional.WebCompanion 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 PUP.Optional.WebCompanion virus can do?

• Sample contains Overlay data
• Presents an Authenticode digital signature
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• The binary contains an unknown PE section name indicative of packing
• Authenticode signature is invalid

How to determine PUP.Optional.WebCompanion?

File Info:
name: F618BBBDE83D1E48AE30.mlw
path: /opt/CAPEv2/storage/binaries/993541cb21e42ad93380c187169e9f5d04e35ea5b17e1482ce51fe69b2ddf2d1
crc32: 2FA3E5E0
md5: f618bbbde83d1e48ae30a3f07673552d
sha1: dfd6eb508aeb9d8d3116df87ffff2f563295db76
sha256: 993541cb21e42ad93380c187169e9f5d04e35ea5b17e1482ce51fe69b2ddf2d1
sha512: e51da7b1f0ef6c7a03408bdbf04ffdc456115eb7dd9baff069f861a84e546dbc4af7f0540b9b0a02dc8610eb5e06acc8d76b8729a28006cebfcac41fa2d233d0
ssdeep: 12288:2G5knZfFKenXnYT0ALfQolyEWq1eztCz4oHHao3CICaDe7GwINiRxLa/Mu:2G50ZfFK6XOooly81QvoHHaorCYeS9i6
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T11CD4D09079E8CEF2C24085F19574BE616A6B9FE01D5380A3F330257A9BF9B4DC11E267
sha3_384: dce03fec20837f2fb61061372072b310d10577e78bfe8ed8927cf03c076c8df62865e7b05b28e39526f1f3a91d420a71
ep_bytes: 558bec6aff68e8b9410068fc47410064
timestamp: 2011-04-18 18:54:06

Version Info:
FileVersion: 9.22 beta
ProductVersion: 9.22 beta
OriginalFilename: 7zS.sfx.exe
InternalName: 7zS.sfx
FileDescription: 7z Setup SFX
CompanyName: Igor Pavlov
LegalCopyright: Copyright (c) 1999-2011 Igor Pavlov
ProductName: 7-Zip
Translation: 0x0409 0x04b0

PUP.Optional.WebCompanion also known as:

How to remove PUP.Optional.WebCompanion?

• 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.