Categories: Malware

MSIL/Filecoder.RB malicious file

The MSIL/Filecoder.RB 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 MSIL/Filecoder.RB virus can do?

  • Executable code extraction
  • Creates RWX memory
  • Detected script timer window indicative of sleep style evasion
  • Reads data out of its own binary image
  • A process created a hidden window
  • Drops a binary and executes it
  • A scripting utility was executed
  • Uses Windows utilities for basic functionality
  • Attempts to modify desktop wallpaper
  • Attempts to disable Windows Defender
  • Uses suspicious command line tools or Windows utilities

How to determine MSIL/Filecoder.RB?


File Info:

crc32: CC8EC3FAmd5: c40ef72fe9ac1ffda0495112fbe71425name: C40EF72FE9AC1FFDA0495112FBE71425.mlwsha1: 4aa07f7203a230627ec5b0386ffc24d8072ac854sha256: e7ba542b73af0fdf306992ea0d423754826f0151eabd4e0a21a6471637334361sha512: e96db30447eb7c7a2add94237e524cd9f5a1318317ef3b3227647689582fe681bdcc538a9d4875d9f71397e85087fb7a6b5b67f1cd4dfaafeef8fd0af4d21d8fssdeep: 6144:m/fAhvV6B8ErzPZp5wdz753RSriX+tGrUHy9aVqA+Vw4:mfAv6B8azBwdmiX+tGAHc3e4type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

MSIL/Filecoder.RB also known as:

Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 00544f8f1 )
DrWeb Trojan.MulDrop11.21259
Cynet Malicious (score: 100)
ALYac Gen:Heur.Ransom.MSIL.1
Cylance Unsafe
CrowdStrike win/malicious_confidence_60% (W)
Alibaba Trojan:MSIL/Filecoder.4ebc598b
K7GW Trojan ( 00544f8f1 )
Cybereason malicious.fe9ac1
Symantec Trojan.Gen.MBT
ESET-NOD32 a variant of MSIL/Filecoder.RB
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Malware.Uztuby-6815912-0
Kaspersky UDS:Trojan-Ransom.MSIL.Gen.gen
BitDefender Gen:Heur.Ransom.MSIL.1
NANO-Antivirus Trojan.Win32.Ransom.fmelme
MicroWorld-eScan Gen:Heur.Ransom.MSIL.1
Sophos Mal/Generic-S
Comodo Malware@#2izup5o3gu2t9
BitDefenderTheta Gen:NN.ZemsilF.34738.bm0@a4Bd17j
McAfee-GW-Edition BehavesLike.Win32.Backdoor.fc
FireEye Generic.mg.c40ef72fe9ac1ffd
Emsisoft Trojan.FileCoder (A)
SentinelOne Static AI – Suspicious PE
Avira TR/Agent.qmuak
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Generic.ASMalwS.331F68F
Microsoft Ransom:MSIL/Gansom.AA!MSR
Arcabit Trojan.Ransom.MSIL.1
ZoneAlarm HEUR:Trojan-Ransom.MSIL.Gen.gen
GData Gen:Heur.Ransom.MSIL.1
AhnLab-V3 Malware/Win32.Generic.C3535328
McAfee Artemis!C40EF72FE9AC
MAX malware (ai score=84)
VBA32 TScope.Trojan.MSIL
Panda Trj/CI.A
Ikarus Trojan.MSIL.BadJoke
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove MSIL/Filecoder.RB?

  • 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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