Written by Robert Bailey

What is Trojan.Win32.Zenpak.pef infection?

In this post you will certainly discover about the definition of Trojan.Win32.Zenpak.pef and its negative impact on your computer. Such ransomware are a form of malware that is elaborated by online scams to demand paying the ransom money by a victim.

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Most of the cases, Trojan.Win32.Zenpak.pef infection will certainly instruct its sufferers to start funds transfer for the function of neutralizing the amendments that the Trojan infection has presented to the sufferer’s gadget.

Trojan.Win32.Zenpak.pef Summary

These modifications can be as follows:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • 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.
  • Mimics the system’s user agent string for its own requests;
  • Expresses interest in specific running processes;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents found on the victim’s hard drive — so the target can no longer use the data;
  • Preventing normal access to the target’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 common channels whereby Trojan.Win32.Zenpak.pef are injected are:

  • By means of phishing e-mails;
  • As a consequence of customer winding up on a resource that holds a destructive software application;

As soon as the Trojan is efficiently infused, it will certainly either cipher the data on the sufferer’s computer or prevent the tool from operating in a proper way – while likewise positioning a ransom note that discusses the need for the sufferers to effect the settlement for the function of decrypting the files or restoring the file system back to the initial condition. In many circumstances, the ransom note will certainly come up when the customer reboots the PC after the system has actually currently been damaged.

Trojan.Win32.Zenpak.pef distribution channels.

In various corners of the world, Trojan.Win32.Zenpak.pef grows by leaps and bounds. However, the ransom notes and also tricks of extorting the ransom quantity might vary relying on particular neighborhood (local) settings. The ransom notes and also techniques of extorting the ransom quantity may differ depending on particular neighborhood (local) setups.

Ransomware injection

For instance:

    Faulty notifies regarding unlicensed software program.

    In certain areas, the Trojans typically wrongfully report having actually spotted some unlicensed applications enabled on the victim’s tool. The alert then demands the user to pay the ransom.

    Faulty statements regarding prohibited web content.

    In nations where software program piracy is much less preferred, this approach is not as effective for the cyber scams. Alternatively, the Trojan.Win32.Zenpak.pef popup alert might incorrectly claim to be deriving from a law enforcement organization as well as will report having located kid pornography or other prohibited data on the device.

    Trojan.Win32.Zenpak.pef popup alert may wrongly declare to be acquiring from a law enforcement institution and will certainly report having situated kid porn or various other prohibited information on the device. The alert will likewise have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: F4735943
md5: 2a50748d5c5fe4f638d4a6e33c4b46d5
name: upload_file
sha1: 033797a4cfc7d5c20a3e070d0ede613a6a1a82fe
sha256: 87a319a472021ea53e23bfd15d7dfc31795dcf5eed1cb2d377d09f50666cdad9
sha512: 2152aec254cbb892987c5727180ec15ee285d392392960cf8eb983cc3de648ddd8f86c40ecabe55e61a4e2d0481af86d336d1279375c1021f649a208da1e9687
ssdeep: 6144:VaKGFRDWxCvoqDV8ZGU9Li0VBh0XjZLsLZCj8Hqd0u4LLF:4W1qGZbLV+GC4H11
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2002
InternalName: FileDate
FileVersion: 1, 0, 0, 1
ProductName: FileDate Application
ProductVersion: 1, 0, 0, 1
FileDescription: FileDate MFC Application
OriginalFilename: FileDate.EXE
Translation: 0x0409 0x04b0

Trojan.Win32.Zenpak.pef also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
Elastic malicious (high confidence)
ClamAV Win.Trojan.Emotet-9781153-0
CAT-QuickHeal TrojanBanker.Emotet
McAfee Emotet-FSF!2A50748D5C5F
Zillya Trojan.Emotet.Win32.43961
AegisLab Riskware.Win32.Generic.1!c
Sangfor Malware
K7AntiVirus Riskware ( 0040eff71 )
BitDefender Trojan.GenericKD.34924978
K7GW Riskware ( 0040eff71 )
CrowdStrike win/malicious_confidence_100% (W)
TrendMicro TROJ_GEN.R011C0DJN20
Cyren W32/Emotet.AVL.gen!Eldorado
Symantec Packed.Generic.554
APEX Malicious
Avast Win32:BankerX-gen [Trj]
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan.Win32.Zenpak.pef
Alibaba Trojan:Win32/EmotetCrypt.86aff223
MicroWorld-eScan Trojan.GenericKD.34924978
Rising Trojan.Emotet!1.CDA9 (CLASSIC)
Ad-Aware Trojan.GenericKD.34924978
Emsisoft Trojan.GenericKD.34924978 (B)
Comodo Malware@#1y6knmbfivjzi
F-Secure Trojan.TR/Emotet.onlrk
DrWeb Trojan.MailBot.28
VIPRE Trojan.Win32.Generic!BT
Invincea Mal/Generic-R + Troj/Emotet-CRO
McAfee-GW-Edition BehavesLike.Win32.Emotet.fh
Sophos Troj/Emotet-CRO
Ikarus Trojan-Banker.Agent
Jiangmin Trojan.Banker.Emotet.paa
Avira TR/Emotet.onlrk
MAX malware (ai score=85)
Antiy-AVL Trojan/Win32.Emotet
Microsoft Trojan:Win32/EmotetCrypt.ARJ!MTB
Gridinsoft Ransom.Win32.Wacatac.oa!s1
Arcabit Trojan.Generic.D214E9B2
ZoneAlarm HEUR:Trojan.Win32.Zenpak.pef
GData Trojan.GenericKD.34924978
AhnLab-V3 Malware/Win32.Generic.C4207734
VBA32 BScope.Trojan.Emotet
ALYac Trojan.Agent.Emotet
Malwarebytes Trojan.Emotet
Panda Trj/Genetic.gen
ESET-NOD32 Win32/Emotet.CM
TrendMicro-HouseCall TrojanSpy.Win32.EMOTET.SMU.hp
Tencent Malware.Win32.Gencirc.10ce0c3c
SentinelOne DFI – Suspicious PE
MaxSecure Win.MxResIcn.Heur.Gen
Fortinet W32/Emote.CD!tr
AVG Win32:BankerX-gen [Trj]
Qihoo-360 Win32/Trojan.ffa

How to remove Trojan.Win32.Zenpak.pef 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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.Zenpak.pef 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.Zenpak.pef you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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