Categories: Malware

W32/Klez-H malicious file

The W32/Klez-H 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 W32/Klez-H virus can do?

  • The binary contains an unknown PE section name indicative of packing
  • Authenticode signature is invalid
  • Yara rule detections observed from a process memory dump/dropped files/CAPE

How to determine W32/Klez-H?


File Info:

name: 6E50115C843C3F340FF1.mlwpath: /opt/CAPEv2/storage/binaries/f26836188cb190291b3554be8cbfd8fb3fddd7bbc5e2f1f9b61e41ee8f77a683crc32: 66B5B85Amd5: 6e50115c843c3f340ff14440c779b037sha1: 0705a0d1921da09d34dec7848cf0f340339ad001sha256: f26836188cb190291b3554be8cbfd8fb3fddd7bbc5e2f1f9b61e41ee8f77a683sha512: 7ff679e9a9f533efd052a9fc1ac9d2d6ed5e824105f0c94c7e5a7400252c01b67eb487b45bfb0a9ae0a888136c5aaf8d85078b4135b49ea03812c1c3d99b3bcfssdeep: 1536:+WGxs9kGdYk8wO4Cn/8Rnphoba0JLx7GCC4I4PP6PcvPnyp3aOTotXQ:fGfGdYSCn4phobv1GN86PcvgKOEtgtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1E584C902431220A7D65434B5C05A7B8A0690AFF93DA7E536FE157406FA72BCA4E335FEsha3_384: 84d2d2d2cd5d6335be796bd80d4334928737f51e9fe7aea07602687a87cd80eab1d761a2182c50577d7a9ffa93a7293cep_bytes: 558bec6aff6840d240006804ac400064timestamp: 2002-04-13 01:49:44

Version Info:

CompanyName: Adobe Systems IncorporatedFileDescription: Adobe Reader 8.0FileVersion: 8.0.0.2006102300LegalCopyright: Copyright 1984-2006 Adobe Systems Incorporated and its licensors. All rights reserved.ProductName: Adobe ReaderProductVersion: 8.0.0.2006102300OriginalFilename: AcroRd32.exeTranslation: 0x0409 0x04e4

W32/Klez-H also known as:

Bkav W32.Klez.V201.Worm
Elastic malicious (high confidence)
MicroWorld-eScan Win32.Worm.Klez.DAR
ClamAV Win.Trojan.Elkern-2
CAT-QuickHeal W32.Klez.H
McAfee W32/Klez.h@MM
Malwarebytes Worm.Klez
Zillya Worm.Klez.Win32.1
Sangfor Suspicious.Win32.Save.ins
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 0000409e1 )
K7AntiVirus Trojan ( 0000409e1 )
BitDefenderTheta Gen:NN.ZexaF.36250.xu0@aiipFNbi
VirIT Win32.Klez.H
Cyren W32/Klez.H@mm
Symantec W32.Klez.H@mm
ESET-NOD32 Win32/Klez.J
Zoner Worm.Win32.Klez.32858
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Email-Worm.Win32.Klez.h
BitDefender Win32.Worm.Klez.DAR
NANO-Antivirus Trojan.Win32.Klez.csnpyr
Avast Win32:Injected-AZ
Tencent Trojan.Win32.Klez.b
Emsisoft Win32.Worm.Klez.DAR (B)
Baidu Win32.Worm.Klez.b
F-Secure Malware.W32/Elkern.C
DrWeb Win32.HLLM.Klez.4
VIPRE Win32.Worm.Klez.DAR
TrendMicro WORM_KLEZ.H
McAfee-GW-Edition BehavesLike.Win32.Klez.fm
Trapmine malicious.high.ml.score
FireEye Generic.mg.6e50115c843c3f34
Sophos W32/Klez-H
SentinelOne Static AI – Suspicious PE
GData Win32.Worm.Klez.H
Jiangmin I-Worm/Klez.h
Avira W32/Elkern.C
Antiy-AVL Worm[Email]/Win32.Klez.h
Xcitium Worm.Win32.Klez.J@2msa
Arcabit Win32.Worm.Klez.DAR
ViRobot I-Worm.Win32.Klez.H
ZoneAlarm Email-Worm.Win32.Klez.h
Microsoft Worm:Win32/Klez.H@mm
Google Detected
AhnLab-V3 Win32/Klez.H
VBA32 MalwareScope.Worm.Klez.1
ALYac Win32.Worm.Klez.DAR
MAX malware (ai score=88)
Cylance unsafe
Panda W32/Klez.I
TrendMicro-HouseCall WORM_KLEZ.H
Rising Worm.Klez!1.A1CB (CLASSIC)
Yandex Trojan.GenAsa!URVqVkT3TU0
Ikarus Trojan.Win32.Crypt
MaxSecure Worm.W32.Klez.h
Fortinet W32/Wacatac.B!tr
AVG Win32:Injected-AZ
Cybereason malicious.c843c3
DeepInstinct MALICIOUS

How to remove W32/Klez-H?

  • 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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