Categories: Malware

Downloader.Win32.WebCompanion.a information

The Downloader.Win32.WebCompanion.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 Downloader.Win32.WebCompanion.a virus can do?

  • Executable code extraction
  • Attempts to connect to a dead IP:Port (2 unique times)
  • Presents an Authenticode digital signature
  • Creates RWX memory
  • At least one IP Address, Domain, or File Name was found in a crypto call
  • Reads data out of its own binary image
  • Drops a binary and executes it
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic
  • Performs some HTTP requests
  • Uses Windows utilities for basic functionality
  • Collects information about installed applications
  • Checks the version of Bios, possibly for anti-virtualization
  • Checks the CPU name from registry, possibly for anti-virtualization
  • Attempts to create or modify system certificates
  • Collects information to fingerprint the system
  • Anomalous binary characteristics

Related domains:

ocsp.digicert.com
flow.lavasoft.com
h2oapi.adaware.com

How to determine Downloader.Win32.WebCompanion.a?


File Info:

crc32: 05BF8BE4md5: d7994cb5695af20962916da277fa9120name: D7994CB5695AF20962916DA277FA9120.mlwsha1: f5aefccee61780e2a3a5cb60af6df28323194bebsha256: 238f6bb9e3cf79c2ff3d15bdd31e81c86441e2a20d1df14a2bf8de2475a5a837sha512: 18f465d180d75c7fd243d56c0ccffa96b8e13c8875d11bbbeb9e636ba2edfa16135d3e1a941ed0bf3f2e86347cd9eb2998f8420dc9649b36cfbcb2fcafe8305fssdeep: 49152:gG5UfgARwBJCw4ZBkYywPXLgaCGJzseyuiKcrkut8PIs7YwI:gG5QgAReIrkYy8XLjrzsL1EvIs0Ntype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: InternalName: Download CompanionFileVersion: 2.0.1.19CompanyName: CoolROMProductName: Download CompanionProductVersion: 2.0.1.19FileDescription: CoolROM DownloaderOriginalFilename: Download CompanionTranslation: 0x0409 0x04b0

Downloader.Win32.WebCompanion.a also known as:

K7AntiVirus Adware ( 00537fa31 )
Elastic malicious (high confidence)
DrWeb Adware.Downware.19998
ClamAV Win.Virus.Sality-6823647-0
ALYac Trojan.GenericKD.37893880
Malwarebytes PUP.Optional.Downloader
CrowdStrike win/malicious_confidence_100% (D)
BitDefender Trojan.GenericKD.47278632
K7GW Adware ( 00537fa31 )
Cyren W32/WebCompanion.A.gen!Eldorado
Symantec Trojan.Gen.MBT
ESET-NOD32 a variant of MSIL/WebCompanion.D potentially unwanted
Cynet Malicious (score: 99)
Kaspersky not-a-virus:Downloader.Win32.WebCompanion.a
NANO-Antivirus Trojan.Win32.WebCompanion.flfros
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Artemis!Trojan
FireEye Trojan.GenericKD.47278632
Sophos Generic PUA PF (PUA)
SentinelOne Static AI – Suspicious SFX
Avira HEUR/AGEN.1115186
GData Win32.Application.WebCompanion.H
AhnLab-V3 PUP/Win32.Downloader.C2862745
VBA32 Trojan.MSIL.Miner
MAX malware (ai score=80)
Fortinet W32/Miner.D!tr

How to remove Downloader.Win32.WebCompanion.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.
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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