Categories: Malware

Should I remove “Win32/Klez.J”?

The Win32/Klez.J 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 Win32/Klez.J virus can do?

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

How to determine Win32/Klez.J?


File Info:

name: 96FFAE10B0A1BD0EE707.mlwpath: /opt/CAPEv2/storage/binaries/b297ac624e5dd4e6fb5e27864302674fdade62593f4c07439e52bb8c0f733e4dcrc32: A4334DC3md5: 96ffae10b0a1bd0ee70788ee50668906sha1: 08953567bff12e59554da74eabcbdffe261ab96csha256: b297ac624e5dd4e6fb5e27864302674fdade62593f4c07439e52bb8c0f733e4dsha512: 970ed456be93c1616f9e8e40c0a93459bb46336563fa83a77f4cbeb296227d5ab3e49a089c782318d19f0cc9b296cc6c8b5531d1136dd6969057a49f53499d95ssdeep: 1536:XWGxs9kGdYk8wO4Cn3DRwphoba0JLx7GCC4I4PP6PcvPnyp3aOTotXQ:mGfGdYSCnephobv1GN86PcvgKOEtgtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T12484C902431220A7D65434B5C05A7B8A0690AFF93DA7E536FE157406FA72BCA4E335FEsha3_384: 77afb6937480bb760890cac11e7b5f59b42e6c182f9e8efd80c3573e10b19d408c77d0177c408c57572a638da77eb7b7ep_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

Win32/Klez.J also known as:

Bkav W32.Klez.V201.Worm
AVG Win32:Injected-AZ
Elastic malicious (high confidence)
DrWeb Win32.HLLM.Klez.4
MicroWorld-eScan Win32.Worm.Klez.DAR
CAT-QuickHeal W32.Klez.H
McAfee W32/Klez.h@MM
Malwarebytes Worm.Klez
VIPRE Win32.Worm.Klez.DAR
Sangfor Suspicious.Win32.Save.ins
K7AntiVirus Trojan ( 0000409e1 )
K7GW Trojan ( 0000409e1 )
Cybereason malicious.0b0a1b
BitDefenderTheta Gen:NN.ZexaF.36250.xu0@auR8H2ni
VirIT Win32.Klez.H
Cyren W32/Klez.H@mm
Symantec W32.Klez.H@mm
ESET-NOD32 Win32/Klez.J
Cynet Malicious (score: 100)
APEX Malicious
ClamAV Win.Trojan.Elkern-2
Kaspersky Email-Worm.Win32.Klez.h
BitDefender Win32.Worm.Klez.DAR
NANO-Antivirus Trojan.Win32.Klez.csnpyr
Avast Win32:Injected-AZ
Emsisoft Win32.Worm.Klez.DAR (B)
F-Secure Malware.W32/Elkern.C
Baidu Win32.Worm.Klez.f
Zillya Worm.Klez.Win32.1
TrendMicro WORM_KLEZ.H
McAfee-GW-Edition BehavesLike.Win32.Klez.fm
Trapmine malicious.high.ml.score
FireEye Generic.mg.96ffae10b0a1bd0e
Sophos W32/Klez-H
SentinelOne Static AI – Suspicious PE
GData Win32.Worm.Klez.H
Jiangmin I-Worm/Klez.h
Avira W32/Elkern.C
MAX malware (ai score=88)
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
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
Fortinet W32/Wacatac.B!tr
Zoner Worm.Win32.Klez.32858
DeepInstinct MALICIOUS
CrowdStrike win/malicious_confidence_100% (D)

How to remove Win32/Klez.J?

  • 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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