Categories: Backdoor

How to remove “Backdoor.MSIL.Remcos.pef”?

The Backdoor.MSIL.Remcos.pef 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.Remcos.pef virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Creates RWX memory
  • NtSetInformationThread: attempt to hide thread from debugger
  • Dynamic (imported) function loading detected
  • CAPE extracted potentially suspicious content
  • Unconventionial language used in binary resources: Chinese (Traditional)
  • The binary likely contains encrypted or compressed data.
  • Authenticode signature is invalid
  • Behavioural detection: Injection (Process Hollowing)
  • Executed a process and injected code into it, probably while unpacking
  • Behavioural detection: Injection (inter-process)
  • Created a process from a suspicious location
  • Installs itself for autorun at Windows startup
  • Anomalous binary characteristics

How to determine Backdoor.MSIL.Remcos.pef?


File Info:

name: 81DE1B86A17A5EF760E7.mlwpath: /opt/CAPEv2/storage/binaries/6b6fe397f9be608c74d26a2a09258665ebd2fb73d5e743c61c6711c517b7d924crc32: 53660360md5: 81de1b86a17a5ef760e7cdf76eb6da1fsha1: ca6662a7648fada19f08390661f0096b97d755afsha256: 6b6fe397f9be608c74d26a2a09258665ebd2fb73d5e743c61c6711c517b7d924sha512: ffd3308145ea495b618aa9483c2adbf02a2a27addb3c9438be9124d68582fc360b8a403a42667c6bb025a320ed82becf684164154d4e6102d8abae90c45408d7ssdeep: 98304:bt0CqDjYwTjMYP+X//iXAwrx1zKoQXTtjMh7pg8VrWU2koE:mw6jMF//srzdQxMg8ZEkxtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T11D163329450880E6E8648F3F65FEB7A002AF3CF75C55B2A27B497D1F33322D84564EA5sha3_384: b783e0dc1f6a78164b5ec55e855961332fb8909df8b22873d12068b08e5592fac5291bb830d9ebfd5275cf71cdb52363ep_bytes: 6878134000e8eeffffff000000000000timestamp: 2013-12-30 11:03:48

Version Info:

Translation: 0x0404 0x04b0Comments: givtigedrCompanyName: Integra8FileDescription: gluteopeProductName: kouroirooFileVersion: 1.00ProductVersion: 1.00InternalName: TolerancesOriginalFilename: Tolerances.exe

Backdoor.MSIL.Remcos.pef also known as:

Elastic malicious (high confidence)
Cynet Malicious (score: 100)
McAfee Fareit-FRM!81DE1B86A17A
Malwarebytes Trojan.MalPack.VB.Generic
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 005628bd1 )
K7GW Trojan ( 005628bd1 )
CrowdStrike win/malicious_confidence_80% (D)
Symantec Packed.Generic.603
ESET-NOD32 a variant of Win32/Injector.EKOS
APEX Malicious
ClamAV Win.Packed.Ponystealer-9798289-0
Kaspersky HEUR:Backdoor.MSIL.Remcos.pef
BitDefender Gen:Heur.PonyStealer.9p0@qKup3Aub
NANO-Antivirus Trojan.Win32.Remcos.hcecsm
MicroWorld-eScan Gen:Heur.PonyStealer.9p0@qKup3Aub
Avast Win32:RATX-gen [Trj]
Tencent Malware.Win32.Gencirc.10b9a68d
Ad-Aware Gen:Heur.PonyStealer.9p0@qKup3Aub
Emsisoft Gen:Heur.PonyStealer.9p0@qKup3Aub (B)
DrWeb Trojan.DownLoader33.9668
McAfee-GW-Edition BehavesLike.Win32.Generic.wc
FireEye Generic.mg.81de1b86a17a5ef7
Sophos ML/PE-A + Mal/FareitVB-AC
SentinelOne Static AI – Malicious PE
GData Gen:Heur.PonyStealer.9p0@qKup3Aub
Jiangmin Backdoor.MSIL.crtz
Avira HEUR/AGEN.1136442
Antiy-AVL Trojan/Generic.ASMalwS.300576E
Arcabit Trojan.PonyStealer.EACF37
Microsoft Trojan:Win32/Remcos.RRR!MTB
AhnLab-V3 Suspicious/Win.VBKrypt.X2058
Acronis suspicious
VBA32 BScope.Trojan.Wacatac
ALYac Gen:Heur.PonyStealer.9p0@qKup3Aub
MAX malware (ai score=84)
Cylance Unsafe
Rising Downloader.Guloader!1.C916 (CLASSIC)
Yandex Trojan.GenAsa!NbkgyjpS71M
Ikarus Trojan.Win32.Krypt
eGambit Unsafe.AI_Score_99%
Fortinet W32/GuLoader.VHHQ!tr
BitDefenderTheta Gen:NN.ZevbaF.34062.9p0@aKup3Aub
AVG Win32:RATX-gen [Trj]
Cybereason malicious.6a17a5
MaxSecure Trojan.Malware.300983.susgen

How to remove Backdoor.MSIL.Remcos.pef?

  • 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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