What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Trojan:Win32/Occamy.CFF infection?

In this article you will certainly discover regarding the definition of Trojan:Win32/Occamy.CFF as well as its adverse influence on your computer system. Such ransomware are a form of malware that is specified by on-line fraudulences to demand paying the ransom by a victim.

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In the majority of the cases, Trojan:Win32/Occamy.CFF ransomware will certainly instruct its sufferers to start funds transfer for the function of counteracting the amendments that the Trojan infection has actually introduced to the sufferer’s gadget.

Trojan:Win32/Occamy.CFF Summary

These alterations can be as follows:

  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Deletes its original binary from disk;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers located on the sufferer’s hard drive — so the victim can no longer utilize the data;
  • Preventing regular access to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most regular channels through which Trojan:Win32/Occamy.CFF are injected are:

  • By ways of phishing emails;
  • As a repercussion of user winding up on a source that organizes a harmful software application;

As soon as the Trojan is successfully infused, it will either cipher the data on the sufferer’s PC or avoid the gadget from working in a proper manner – while also positioning a ransom note that points out the demand for the targets to effect the settlement for the purpose of decrypting the papers or restoring the file system back to the initial condition. In many instances, the ransom money note will turn up when the client restarts the PC after the system has already been damaged.

Trojan:Win32/Occamy.CFF distribution networks.

In different corners of the globe, Trojan:Win32/Occamy.CFF grows by leaps as well as bounds. Nonetheless, the ransom notes and methods of obtaining the ransom money amount might vary depending on specific regional (local) setups. The ransom money notes and tricks of extorting the ransom amount might vary depending on certain regional (regional) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software.

    In particular areas, the Trojans usually wrongfully report having actually discovered some unlicensed applications made it possible for on the target’s device. The sharp after that requires the user to pay the ransom money.

    Faulty declarations about illegal web content.

    In nations where software program piracy is much less popular, this technique is not as reliable for the cyber fraudulences. Alternatively, the Trojan:Win32/Occamy.CFF popup alert may incorrectly claim to be originating from a law enforcement organization and will report having located child pornography or various other illegal data on the tool.

    Trojan:Win32/Occamy.CFF popup alert may incorrectly declare to be deriving from a law enforcement organization as well as will certainly report having located child porn or other unlawful information on the tool. The alert will likewise contain a need for the individual to pay the ransom.

Technical details

File Info:

crc32: B09EB417
md5: 92e1dddf1b5609d86ebbb96433158c4e
name: 92E1DDDF1B5609D86EBBB96433158C4E.mlw
sha1: e5ad6d03cc403199be431bfd31aeefde6c8fcf31
sha256: ff3708e7e423c4ab7926f39ee8c8ef332e5c55944df81a30398d0b6a35259364
sha512: 14c213f8b54a9aab4338117416d5ce6097f8cffcc8e5cadeb51c96d02055194da20d8332f2bbed0c8ba019e18ea2c19db847c8be3b3acf209e50b3bf171042b1
ssdeep: 6144:WhhrS5mdtb+LSLHkm9adiM0jR2h50PFk:idtKYE7diQ56Fk
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Occamy.CFF also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ransom.GandCrab.16
McAfee RDN/Generic Dropper
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
BitDefender Gen:Variant.Ransom.GandCrab.16
K7GW Trojan ( 003c36381 )
K7AntiVirus Trojan ( 003c36381 )
BitDefenderTheta Gen:NN.ZexaF.34590.puW@aulC6Ugi
Symantec Trojan.Turla.B
Avast Win32:Malware-gen
Kaspersky Trojan.Win32.Agent.qwgtlw
Alibaba Trojan:Win32/Turla.b87cc368
NANO-Antivirus Trojan.Win32.Agent.ervmws
ViRobot Trojan.Win32.Z.Agent.253952.ANB
AegisLab Adware.Win32.Generic.mneY
APEX Malicious
Rising Dropper.Generic!8.35E (CLOUD)
Ad-Aware Gen:Variant.Ransom.GandCrab.16
Sophos Mal/Generic-S
Comodo Malware@#zub7iixku446
F-Secure Trojan.TR/Dropper.Gen
DrWeb Trojan.MulDrop7.37067
Zillya Dropper.Agent.Win32.274797
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
Emsisoft Gen:Variant.Ransom.GandCrab.16 (B)
Ikarus Trojan.Dropper
Jiangmin Trojan.Agent.bthd
Avira TR/Dropper.Gen
MAX malware (ai score=100)
Antiy-AVL Trojan/Win64.Agent
Microsoft Trojan:Win32/Occamy.CFF
Arcabit Trojan.Ransom.GandCrab.16
ZoneAlarm Trojan.Win32.Agent.qwgtlw
GData Gen:Variant.Ransom.GandCrab.16
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Agent.C2080237
Acronis suspicious
VBA32 Trojan.Agentb
ALYac Gen:Variant.Ransom.GandCrab.16
TACHYON Trojan/W32.Agent.253952.APX
Malwarebytes Generic.Malware/Suspicious
Panda Trj/GdSda.A
ESET-NOD32 a variant of Win32/Turla.DZ
Tencent Malware.Win32.Gencirc.11498002
Yandex Trojan.GenAsa!dzE3XcRyfrc
SentinelOne Static AI – Malicious PE
Fortinet W64/Agent.IHG!tr
Webroot W32.AGent.qwgtlw
AVG Win32:Malware-gen
Qihoo-360 Win32/TrojanDropper.Generic.HgIASOYA

How to remove Trojan:Win32/Occamy.CFF virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Trojan:Win32/Occamy.CFF files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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If the guide doesn’t help you to remove Trojan:Win32/Occamy.CFF you can always ask me in the comments for getting help.

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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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