Categories: Backdoor

Backdoor:MSIL/Webshell.BB!MTB (file analysis)

The Backdoor:MSIL/Webshell.BB!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.BB!MTB virus can do?

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

How to determine Backdoor:MSIL/Webshell.BB!MTB?


File Info:

name: E634AAE37B07960444C0.mlwpath: /opt/CAPEv2/storage/binaries/7ef36569b7dcb9cba7052590235b0ab581c1bc6c38279829a4efec6e090af733crc32: 4B62119Emd5: e634aae37b07960444c0e83776024082sha1: 23b40b8cbfd7f5609ee4781e80506ae618f4f35bsha256: 7ef36569b7dcb9cba7052590235b0ab581c1bc6c38279829a4efec6e090af733sha512: efafff8e69304effa981ac6dfa8e5f8afd04ccd017a93fdbce8a350f5acdf9f93b7fcd77b1cae7836b57080f293761e186dae65b267fbacc475f01aabe32d003ssdeep: 192:BhpsifXpjjkJpj3fLeMLYOs1TD+t82VFLsTmxOQadkX7Lt4TwT:Bga4pj3fLeML1g2DoTmxOtKX7Lt4TwTtype: PE32 executable (DLL) (GUI) Intel 80386, for MS Windowstlsh: T13252E71EAB98CD13C6BB9331A7B29604C4B695070596CF1ABDDCA5C61FB334402A2FD8sha3_384: 6172663a13d7a51aa95c0d886ccff7365bf3cb7d333eb9f6ea96dec1bac00d4a8eb6244831b58c0079c3e31311a7b360ep_bytes: ff250020001000000000000000000000timestamp: 2024-01-18 23:00:14

Version Info:

0: [No Data]

Backdoor:MSIL/Webshell.BB!MTB also known as:

Bkav W32.AIDetectMalware.CS
Lionic Trojan.Win32.Webshell.m!c
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.MSILHeracles.61452
Skyhigh BehavesLike.Win32.Infected.lm
ALYac Gen:Variant.MSILHeracles.61452
Cylance unsafe
Zillya Trojan.Webshell.Win32.16517
Sangfor Backdoor.Msil.Agent.V8vu
Alibaba Backdoor:MSIL/WebShell.76df12fe
Arcabit Trojan.MSILHeracles.DF00C
Symantec Trojan.Gen.MBT
ESET-NOD32 a variant of MSIL/Webshell.EV
Cynet Malicious (score: 99)
ClamAV Win.Packed.Webshell-10016062-0
Kaspersky HEUR:Backdoor.MSIL.WebShell.gen
BitDefender Gen:Variant.MSILHeracles.61452
Avast Win32:BackdoorX-gen [Trj]
Sophos Mal/Generic-S
F-Secure Trojan.TR/Dropper.MSIL.Gen
DrWeb BackDoor.WebshellNET.9
VIPRE Gen:Variant.MSILHeracles.61452
Emsisoft Gen:Variant.MSILHeracles.61452 (B)
SentinelOne Static AI – Suspicious PE
Varist W32/WebShell.E.gen!Eldorado
Avira TR/Dropper.MSIL.Gen
Microsoft Backdoor:MSIL/Webshell.BB!MTB
ZoneAlarm HEUR:Backdoor.MSIL.WebShell.gen
GData Gen:Variant.MSILHeracles.61452
Google Detected
AhnLab-V3 Backdoor/Win.WEBSHELL.C5557106
McAfee Artemis!E634AAE37B07
Malwarebytes Trojan.WebShell
Panda Trj/GdSda.A
Tencent Backdoor.MSIL.WebShell.kt
Ikarus Trojan.MSIL.Webshell
Fortinet W32/Webshell.EE!tr
AVG Win32:BackdoorX-gen [Trj]
DeepInstinct MALICIOUS

How to remove Backdoor:MSIL/Webshell.BB!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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