Categories: RansomTrojan

TrojanRansom.StopCrypt (file analysis)

The TrojanRansom.StopCrypt 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 TrojanRansom.StopCrypt virus can do?

  • Executable code extraction
  • Injection (inter-process)
  • Injection (Process Hollowing)
  • Attempts to connect to a dead IP:Port (4 unique times)
  • Creates RWX memory
  • Possible date expiration check, exits too soon after checking local time
  • A process attempted to delay the analysis task.
  • A named pipe was used for inter-process communication
  • A process created a hidden window
  • Drops a binary and executes it
  • Performs some HTTP requests
  • The binary likely contains encrypted or compressed data.
  • Executed a process and injected code into it, probably while unpacking
  • Network activity contains more than one unique useragent.
  • Installs itself for autorun at Windows startup
  • Writes a potential ransom message to disk
  • Attempts to modify proxy settings
  • Creates a copy of itself
  • Anomalous binary characteristics
  • Uses suspicious command line tools or Windows utilities

Related domains:

z.whorecord.xyz
a.tomx.xyz
api.2ip.ua
securebiz.org
astdg.top
gheorghip.tumblr.com
ocsp.comodoca.com
ocsp.usertrust.com
ocsp.sectigo.com

How to determine TrojanRansom.StopCrypt?


File Info:

crc32: 626F3E81md5: 8b57e3d9d1390965bb10341f2f086c9bname: 8B57E3D9D1390965BB10341F2F086C9B.mlwsha1: 41a14e89089e0bd85b4e9c61bdb17abdd70eb0b4sha256: 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856bsha512: f2c1d9be9b3370c29703bbc4a7ac83fbeb3ac5752d8c69d25630ebd27a46fa0e969061cd9e45555d6522fe575fc6d2fcf761faa04caeaa5ddae2e136b711c171ssdeep: 24576:0Bqh0O7buQ0X3Pi7gRK0GxabKWOgpV/3:0POGRnP/AxawgpVtype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x120a 0x052e

TrojanRansom.StopCrypt also known as:

Elastic malicious (high confidence)
DrWeb Trojan.DownLoader41.25700
ClamAV Win.Packed.Generic-9888541-0
CAT-QuickHeal Ransom.Stop.Z5
ALYac Gen:Variant.Fragtor.10550
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Cyren W32/Kryptik.EYC.gen!Eldorado
ESET-NOD32 a variant of Win32/Kryptik.HMEY
APEX Malicious
Avast Win32:BotX-gen [Trj]
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan-Ransom.Win32.Stop.gen
BitDefender Gen:Variant.Fragtor.10550
MicroWorld-eScan Gen:Variant.Fragtor.10550
Ad-Aware Gen:Variant.Fragtor.10550
Sophos Mal/Generic-S
BitDefenderTheta Gen:NN.ZexaF.34126.XqW@aOcUe6fK
McAfee-GW-Edition BehavesLike.Win32.Generic.bc
FireEye Generic.mg.8b57e3d9d1390965
Emsisoft Gen:Variant.Fragtor.10550 (B)
SentinelOne Static AI – Malicious PE
Avira TR/AD.InstaBot.uzmzw
Microsoft Trojan:Win32/Azorult.DA!MTB
Gridinsoft Ransom.Win32.STOP.ko!se14275
GData Win32.Trojan.BSE.DQ3JQ1
AhnLab-V3 Trojan/Win.Azorult.R438795
McAfee Packed-GDT!8B57E3D9D139
MAX malware (ai score=82)
VBA32 TrojanRansom.StopCrypt
Malwarebytes Trojan.MalPack.GS
Panda Trj/GdSda.A
Rising Trojan.Kryptik!1.C6FC (CLASSIC)
Ikarus Trojan.Win32.Crypt
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Wacatac.DF!tr
AVG Win32:BotX-gen [Trj]

How to remove TrojanRansom.StopCrypt?

  • 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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