Categories: Trojan

Trojan:Win32/Occamy.B (file analysis)

The Trojan:Win32/Occamy.B 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.

What Trojan:Win32/Occamy.B virus can do?

  • Executable code extraction
  • Injection (inter-process)
  • Injection (Process Hollowing)
  • Injection with CreateRemoteThread in a remote process
  • Attempts to connect to a dead IP:Port (2 unique times)
  • Creates RWX memory
  • A process attempted to delay the analysis task.
  • At least one IP Address, Domain, or File Name was found in a crypto call
  • Reads data out of its own binary image
  • A process created a hidden window
  • The binary likely contains encrypted or compressed data.
  • Uses Windows utilities for basic functionality
  • Executed a process and injected code into it, probably while unpacking
  • Attempts to remove evidence of file being downloaded from the Internet
  • Installs itself for autorun at Windows startup
  • Exhibits behavior characteristic of Nanocore RAT
  • Creates a copy of itself
  • Collects information to fingerprint the system

How to determine Trojan:Win32/Occamy.B?


File Info:

crc32: 5DCC7EBBmd5: 18a262533a14c87af4be93c6a1cb4cddname: maye.jpgsha1: f8b9c316f25c37a3bdfa70f5cc9c1f9d2e624bc8sha256: 5b3adbc252c0db2282b06d0339961cfca5f723a6e4507d20df111aa9334abb27sha512: c73595e1d4a347069f356e7100057813e8a9d15467af762ce9a0719d83cd6c1d892848cae6be38e0b75968545023fd443edff38419171d06f4479d71834b6738ssdeep: 12288:fIo+/YyMnfpPJfwlAXvAOAoxzL2LQs5nX9kXsne5:f7Y1MvwkaoVL3stSvtype: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0LegalCopyright: Assembly Version: 1.0.0.0InternalName: Library Management.exeFileVersion: 1.0.0.0CompanyName: LegalTrademarks: Comments: ProductName: ProductVersion: 1.0.0.0FileDescription: OriginalFilename: Library Management.exe

Trojan:Win32/Occamy.B also known as:

MicroWorld-eScan Trojan.GenericKD.32706785
FireEye Generic.mg.18a262533a14c87a
ALYac Backdoor.RAT.Nanocore.gen
Malwarebytes Trojan.Crypt.MSIL
Alibaba TrojanPSW:MSIL/Kryptik.f1c18c11
Cybereason malicious.6f25c3
Arcabit Trojan.Generic.D1F310E1
Invincea heuristic
BitDefenderTheta Gen:NN.ZemsilCO8.32250.Bm0@ayH5ez
Cyren W32/Ransom.AY.gen!Eldorado
Symantec Trojan Horse
APEX Malicious
Kaspersky HEUR:Trojan-PSW.MSIL.Heye.gen
BitDefender Trojan.GenericKD.32706785
Paloalto generic.ml
Ad-Aware Trojan.GenericKD.32706785
F-Secure Trojan.TR/Kryptik.jwdwi
DrWeb Trojan.Siggen8.54983
VIPRE Trojan.Win32.Generic!BT
TrendMicro TROJ_FRS.0NA103KD19
McAfee-GW-Edition BehavesLike.Win32.Generic.gc
Trapmine malicious.high.ml.score
Sophos Mal/Generic-S
F-Prot W32/Ransom.AY.gen!Eldorado
Webroot W32.Trojan.MSIL.Heye
Avira TR/Kryptik.jwdwi
MAX malware (ai score=85)
Antiy-AVL Trojan[PSW]/MSIL.Heye
Microsoft Trojan:Win32/Occamy.B
Endgame malicious (high confidence)
AegisLab Trojan.Win32.Malicious.4!c
ZoneAlarm HEUR:Trojan-PSW.MSIL.Heye.gen
GData Trojan.GenericKD.32706785
Acronis suspicious
McAfee RDN/Generic.grp
ESET-NOD32 a variant of MSIL/Kryptik.TQI
TrendMicro-HouseCall TROJ_FRS.0NA103KD19
Ikarus Win32.Outbreak
Fortinet MSIL/Kryptik.TQI!tr
AVG FileRepMetagen [Malware]
Panda Trj/GdSda.A
CrowdStrike win/malicious_confidence_60% (W)
Qihoo-360 Win32/Trojan.PSW.ce6

How to remove Trojan:Win32/Occamy.B?

  • 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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