Categories: Backdoor

About “Backdoor.WebShell” infection

The Backdoor.WebShell 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.WebShell virus can do?

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

How to determine Backdoor.WebShell?


File Info:

name: E1C50C9B74E392F04CA2.mlwpath: /opt/CAPEv2/storage/binaries/10b6fc8f9ae8a055617c3a2db3fe10c04e0d2170bbb1392e4e11fed5773618eccrc32: 8DCD0F79md5: e1c50c9b74e392f04ca257646df4e617sha1: b14fb13cb11bdee11fc601791e535cc635a039d2sha256: 10b6fc8f9ae8a055617c3a2db3fe10c04e0d2170bbb1392e4e11fed5773618ecsha512: ce2f5a2c31c5791332a930984f6eb1d0c2e5536d16ec6f4f8483024c9c4057481473117bd8b3476b2999d1f205f35746b653ec733c00141ee37ec93b77ab8d4fssdeep: 96:6cdfkAngBAXVjbVJyySs1AKAzMlB87Zzp+wtSj:6kXFljZJyps1TAzIB877vsjtype: PE32 executable (DLL) (GUI) Intel 80386, for MS Windowstlsh: T150C1E70BBB98CB3BC57F8B3AA6A2874717B5D5199613DB1E1CC4119C6C8371817B07E1sha3_384: 32f4c8cfbc4569d5069059eaeec86e0eb3a07fc5ed33d9f99b03b460683bc8d21273f595731feed47adebea0c0357077ep_bytes: ff250020001000000000000000000000timestamp: 2023-11-28 20:32:00

Version Info:

Translation: 0x0000 0x04b0FileDescription: FileVersion: 0.0.0.0InternalName: App_Web_fs4w0tzc.dllLegalCopyright: OriginalFilename: App_Web_fs4w0tzc.dllProductVersion: 0.0.0.0Assembly Version: 0.0.0.0

Backdoor.WebShell also known as:

Bkav W32.AIDetectMalware.CS
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKDZ.104569
ClamAV Win.Packed.Webshell-10016062-0
CAT-QuickHeal Backdoor.WebShell
McAfee GenericRXVF-WD!E1C50C9B74E3
Malwarebytes Trojan.WebShell
CrowdStrike win/malicious_confidence_100% (W)
K7GW Trojan ( 005b19ee1 )
K7AntiVirus Trojan ( 005b19ee1 )
Symantec Trojan.Gen.MBT
ESET-NOD32 a variant of MSIL/Webshell.EV
APEX Malicious
Emsisoft Trojan.GenericKDZ.104569 (B)
F-Secure Trojan.TR/Dropper.MSIL.Gen
DrWeb BackDoor.WebshellNET.9
Sophos Mal/Generic-S
SentinelOne Static AI – Malicious PE
Varist W32/Trojan.IIE.gen!Eldorado
Avira TR/Dropper.MSIL.Gen
Arcabit Trojan.Generic.D19879
ZoneAlarm HEUR:Backdoor.MSIL.WebShell.gen
Microsoft Backdoor:MSIL/Webshell.BB!MTB
Google Detected
AhnLab-V3 Trojan/Win.Generic.C5342975
TACHYON Backdoor/W32.DN-WebShell.6144.K
DeepInstinct MALICIOUS
Tencent Backdoor.MSIL.WebShell.ki
Ikarus Trojan.MSIL.Webshell
MaxSecure Trojan.Malware.121218.susgen
Fortinet W32/Webshell.EE!tr
Panda Trj/GdSda.A

How to remove Backdoor.WebShell?

  • 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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