Categories: Backdoor

About “Backdoor:MSIL/WebShell.AK!MTB” infection

The Backdoor:MSIL/WebShell.AK!MTB 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 Backdoor:MSIL/WebShell.AK!MTB virus can do?

  • CAPE extracted potentially suspicious content
  • Authenticode signature is invalid
  • Anomalous .NET characteristics

How to determine Backdoor:MSIL/WebShell.AK!MTB?


File Info:

name: 666431D8B95B0D451F58.mlwpath: /opt/CAPEv2/storage/binaries/e6906b20b53424c3b0ab423dd9d5f13357ba604477c32d2b22e8c0e00fa06503crc32: 879554E4md5: 666431d8b95b0d451f586226f2567074sha1: c9e1cc9d0a834af69379d93133f8cee82bf3b312sha256: e6906b20b53424c3b0ab423dd9d5f13357ba604477c32d2b22e8c0e00fa06503sha512: 1eed66366e52fa138b319bd3be95c7de23f24f82ee88345b3965750661b2c7e8bad61ac8c01930dc845cfb3347fb7a9e464568456a0415c5b7a18f377c79d2fessdeep: 1536:PBCte5XmmmmmmmmmmmmmgYXVy14j8R8BNYagNGUYnQ/1Ty:ye5xZ+YufzeTtype: PE32 executable (DLL) (GUI) Intel 80386, for MS Windowstlsh: T1AEC3610226D19A06D87B423892324E58DFB7E8079232D6187DDE75BF1FB7E008517FA5sha3_384: 87f13d959d0cedc0337cf39f051cfd5901348ef58dc6e1164f3e706053a28e188f8c72740936ae4fbc595e81e3df54e6ep_bytes: ff250020400000000000000000000000timestamp: 2023-03-09 17:35:38

Version Info:

0: [No Data]

Backdoor:MSIL/WebShell.AK!MTB also known as:

Bkav W32.AIDetectMalware.CS
Lionic Trojan.Win32.WebShell.m!c
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.MSILHeracles.68688
Skyhigh GenericRXVO-FQ!666431D8B95B
McAfee GenericRXVO-FQ!666431D8B95B
Cylance unsafe
Zillya Backdoor.WebShell.Win32.10
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Backdoor:MSIL/WebShell.a5994cdc
K7GW Trojan ( 0059fd5d1 )
K7AntiVirus Trojan ( 0059fd5d1 )
Arcabit Trojan.MSILHeracles.D10C50
Symantec Trojan.Gen.2
ESET-NOD32 a variant of MSIL/Agent.EJA
Cynet Malicious (score: 99)
APEX Malicious
ClamAV Win.Packed.Webshell-10013238-0
Kaspersky HEUR:Backdoor.MSIL.WebShell.gen
BitDefender Gen:Variant.MSILHeracles.68688
Avast Win32:BackdoorX-gen [Trj]
Tencent Malware.Win32.Gencirc.13bf5e96
Emsisoft Gen:Variant.MSILHeracles.68688 (B)
F-Secure Trojan.TR/Agent.rqkqi
DrWeb BackDoor.WebshellNET.5
VIPRE Gen:Variant.MSILHeracles.68688
TrendMicro TROJ_GEN.R002C0DAA24
Sophos Mal/Generic-S
Ikarus Trojan.MSIL.Agent
Varist W32/MSIL_Agent.EYN.gen!Eldorado
Avira TR/Agent.rqkqi
Antiy-AVL Trojan[Backdoor]/MSIL.WebShell
Microsoft Backdoor:MSIL/WebShell.AK!MTB
ZoneAlarm HEUR:Backdoor.MSIL.WebShell.gen
GData Gen:Variant.MSILHeracles.68688
Google Detected
AhnLab-V3 Trojan/Win.Generic.C5392756
Malwarebytes Generic.Malware.AI.DDS
Panda Trj/Chgt.AD
TrendMicro-HouseCall TROJ_GEN.R002C0DAA24
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.121218.susgen
Fortinet MSIL/Agent.EJA!tr
AVG Win32:BackdoorX-gen [Trj]
DeepInstinct MALICIOUS

How to remove Backdoor:MSIL/WebShell.AK!MTB?

  • 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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