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.

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.

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What PUP.Optional.WebCompanion virus can do?

Sample contains Overlay data
Presents an Authenticode digital signature
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: 97ACFBDF019FBBE196D5.mlw
path: /opt/CAPEv2/storage/binaries/41b4fed4ea524ca78cbfb2ef941ff7f2cabde01dafb9e90fc818ba5f4cc9a8e1
crc32: C116B4F8
md5: 97acfbdf019fbbe196d59599167be671
sha1: 396d471d7cbfd8a84d1076067b18b098130ee4b9
sha256: 41b4fed4ea524ca78cbfb2ef941ff7f2cabde01dafb9e90fc818ba5f4cc9a8e1
sha512: 46fefb101ed38be4f418ee01076ea30694708088824e0c0c679dfa48a35820cad91d2944d448b01eacab9839c62f75a6429972532bc2e34962b2e50cc4ed83f8
ssdeep: 12288:VG5knZfFKerT6pW21Cg/f35Q5911xbBBKTYGXYm4FYoZHYtIq6:VG50ZfFKUuw21XX3EN3K3J4DgIq6
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T12BC4F1127EE189BAD5420131C974AFE5E2F6FE161E21546333993E3E3F3A542C132A5E
sha3_384: 0d9797ca41343732042b361b98856a6ec42e75f67953250e0c5fc5cd09ce048ce2008144089e390bb17324ff1e5e2d53
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:

Elastic	malicious (high confidence)
Cynet	Malicious (score: 100)
Cylance	unsafe
CrowdStrike	win/grayware_confidence_90% (D)
K7GW	Unwanted-Program ( 0056626f1 )
K7AntiVirus	Unwanted-Program ( 0056626f1 )
ESET-NOD32	a variant of MSIL/WebCompanion.C potentially unwanted
DrWeb	Program.Unwanted.5275
Sophos	Generic ML PUA (PUA)
Webroot	W32.Adware.Gen
Xcitium	ApplicUnwnt@#mmrz3rr8cofd
Malwarebytes	PUP.Optional.WebCompanion
Fortinet	Riskware/WebCompanion
DeepInstinct	MALICIOUS

How to remove PUP.Optional.WebCompanion?

PUP.Optional.WebCompanion removal tool

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.

About the author

Paul Valéry

I'm a cyber security analyst and data science expert with 5+ years of experience with security software contractors.

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