What is “PUP.Optional.WebCompanion”?

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
• The binary contains an unknown PE section name indicative of packing
• Authenticode signature is invalid
• Anomalous binary characteristics

How to determine PUP.Optional.WebCompanion?

File Info:
name: D4ED642C25842F0C2734.mlw
path: /opt/CAPEv2/storage/binaries/c9fa8636d2125844e5151096f581fb5879c7513062faa70ee583734ccfa5a98e
crc32: F20B74E0
md5: d4ed642c25842f0c27345d664734de16
sha1: f9c50a6db239026fac1b40b11634be88daced173
sha256: c9fa8636d2125844e5151096f581fb5879c7513062faa70ee583734ccfa5a98e
sha512: cca44b3a07badd878e3402290ae898f488e0b4fa2e2aacae4e8fcd063f0394fd7ac66fc98ab04849b06464c927042304ebd65aaee33d22dacb7a3afd9a9937f9
ssdeep: 12288:FG5knZfFKer86pW21Cg/f35Q5911xbBBKTYGXYm4FYoZHYtIKk:FG50ZfFKUvw21XX3EN3K3J4DgIKk
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T152C4F1127EE189BAD5420131C974AFE5E2F5FE161E21946333993E3E3F3A542C132A5E
sha3_384: 3a2f370edf53ce1998a11db2f84767e5493769cd671f41adc5584eb40ea221a0e9aea57300ec44dcb0cdd17c6da72d45
ep_bytes: 558bec6aff68e8b9410068fc47410064
timestamp: 2011-04-18 18:54:06

Version Info:
FileVersion: 11.908.5.907
ProductVersion: 11.908.5.907
CompanyName: Lavasoft
FileDescription: Web Companion Installer
InternalName: Installer.exe
LegalCopyright: c Lavasoft Limited. All Rights Reserved.
OriginalFilename: Installer.exe
ProductName: Web Companion Installer
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.