What is “Backdoor:MSIL/WebShell.AI!MTB”?

The Backdoor:MSIL/WebShell.AI!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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Removing PC viruses manually may take hours and may damage your PC in the process. We recommend using GridinSoft Anti-Malware for virus removal. Allows to complete scan and cure your PC during the trial period.

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What Backdoor:MSIL/WebShell.AI!MTB virus can do?

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

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


File Info:
name: 77BA4EAE3894F459104F.mlw
path: /opt/CAPEv2/storage/binaries/8c1724763b3f9992fce9cc02b544311eea01af0c576b9424773d845d2698fa04
crc32: CB56831B
md5: 77ba4eae3894f459104f5ed95f7a73ea
sha1: d2a71b6fbe68b1f4b35a87b13b90f503dac0f97e
sha256: 8c1724763b3f9992fce9cc02b544311eea01af0c576b9424773d845d2698fa04
sha512: bc3f6e28d2f8edca47dad932e91f360acb0417d8a269d8f2e862e348668985a0495891ead002ae1ac1c19e3f4c111f10eea38da09bdba336d3759b1d66d54c5d
ssdeep: 96:Crzv0TQrB0GELgcHbhSg1EzVh2nPpG2pMtb3S:kVpEEcHbggSzVonhGIMU
type: PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
tlsh: T1BDD1080BABD4C637C0BB8739E5F25643137AE745B813AB2F59C4014DAC835049AE2B76
sha3_384: fb357cc6d53b5e53277f8918f2bb5c7ab7ca5ec16aa957d13a7f09308948ce381d3f13ac545f976dbebf3aedcd57e77a
ep_bytes: ff250020001000000000000000000000
timestamp: 2024-01-15 16:02:01

Version Info:
Translation: 0x0000 0x04b0
FileDescription:  
FileVersion: 0.0.0.0
InternalName: App_Web_1wwkn2ue.dll
LegalCopyright:  
OriginalFilename: App_Web_1wwkn2ue.dll
ProductVersion: 0.0.0.0
Assembly Version: 0.0.0.0

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

Bkav	W32.AIDetectMalware.CS
MicroWorld-eScan	Trojan.GenericKDZ.104398
Skyhigh	BehavesLike.Win32.Agent.xt
McAfee	Artemis!77BA4EAE3894
Malwarebytes	Trojan.WebShell.MSIL
VIPRE	Trojan.GenericKDZ.104398
CrowdStrike	win/malicious_confidence_100% (W)
Symantec	Trojan.Gen.MBT
Elastic	malicious (high confidence)
ESET-NOD32	a variant of MSIL/Agent.EJA
Cynet	Malicious (score: 99)
APEX	Malicious
Kaspersky	HEUR:Backdoor.MSIL.WebShell.gen
BitDefender	Trojan.GenericKDZ.104398
Avast	Win32:BackdoorX-gen [Trj]
Tencent	Backdoor.MSIL.WebShell.16000615
Emsisoft	Trojan.GenericKDZ.104398 (B)
F-Secure	Heuristic.HEUR/AGEN.1364302
DrWeb	BackDoor.WebshellNET.5
Ikarus	Trojan.MSIL.Agent
Avira	HEUR/AGEN.1364302
Microsoft	Backdoor:MSIL/WebShell.AI!MTB
Arcabit	Trojan.Generic.D197CE
ZoneAlarm	HEUR:Backdoor.MSIL.WebShell.gen
GData	Trojan.GenericKDZ.104398
Varist	W32/MSIL_Troj.CUJ.gen!Eldorado
AhnLab-V3	Trojan/Win.Generic.C5507595
ALYac	Trojan.GenericKDZ.104398
Panda	Trj/GdSda.A
SentinelOne	Static AI – Malicious PE
MaxSecure	Trojan.Malware.121218.susgen
Fortinet	MSIL/Agent.EJA!tr
AVG	Win32:BackdoorX-gen [Trj]

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

Backdoor:MSIL/WebShell.AI!MTB removal tool

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.

About the author

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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