Trojan.Win32.Zenpak

Written by Robert Bailey

What is Trojan.Win32.Zenpak infection?

In this article you will locate about the interpretation of Trojan.Win32.Zenpak and also its negative effect on your computer system. Such ransomware are a form of malware that is specified by on-line scams to demand paying the ransom money by a target.

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Most of the situations, Trojan.Win32.Zenpak infection will advise its targets to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has introduced to the target’s tool.

Trojan.Win32.Zenpak Summary

These alterations can be as complies with:

  • 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Creates a copy of itself;
  • Creates a slightly modified copy of itself;
  • Ciphering the records situated on the target’s disk drive — so the victim can no longer use the data;
  • Preventing normal accessibility 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.

Trojan.Win32.Zenpak

One of the most regular channels through which Trojan.Win32.Zenpak are injected are:

  • By methods of phishing emails;
  • As an effect of user winding up on a resource that hosts a harmful software application;

As soon as the Trojan is successfully infused, it will either cipher the information on the sufferer’s PC or prevent the tool from working in an appropriate fashion – while additionally positioning a ransom money note that mentions the requirement for the sufferers to effect the repayment for the objective of decrypting the files or recovering the data system back to the preliminary condition. In a lot of circumstances, the ransom note will turn up when the client reboots the COMPUTER after the system has currently been damaged.

Trojan.Win32.Zenpak circulation channels.

In different corners of the globe, Trojan.Win32.Zenpak expands by leaps and also bounds. However, the ransom notes and techniques of extorting the ransom money quantity may differ depending on certain neighborhood (regional) setups. The ransom money notes and techniques of obtaining the ransom money quantity may vary depending on specific regional (local) settings.

Ransomware injection

For instance:

    Faulty notifies about unlicensed software program.

    In particular locations, the Trojans typically wrongfully report having detected some unlicensed applications enabled on the victim’s device. The alert after that requires the individual to pay the ransom money.

    Faulty declarations about unlawful material.

    In countries where software piracy is much less popular, this approach is not as reliable for the cyber fraudulences. Conversely, the Trojan.Win32.Zenpak popup alert may incorrectly claim to be deriving from a law enforcement institution and also will report having situated youngster porn or various other illegal data on the gadget.

    Trojan.Win32.Zenpak popup alert may wrongly claim to be acquiring from a legislation enforcement institution and also will report having located youngster porn or various other unlawful data on the gadget. The alert will in a similar way include a need for the customer to pay the ransom.

Technical details

File Info:

crc32: D9F1D822
md5: 8ab5e6e5b50ba0e28ed65ca1fe7e7b4b
name: upload_file
sha1: 3d8d8e0ab99e265971d42eb461248434c2552ba6
sha256: e0513ea38aeedcc2ff0c5297034dbf48c4e76ec1a89209fe627531648f713278
sha512: 07fb4ff0a2322765b2018343fa31400da6c7cb7554d09c90bc9d6da692544e617837b30abcfdd486e67ac11b39a95c1c10fd3e18a0b76cc049383bb62cf591d9
ssdeep: 24576:ssF6mZZcVKfIxTiEVc847flVC6faaQDbGV6eH81k6IbGD2JTu0GoZQDbGV6eH81u:fF6mw4gxeOw46fUbNecCCFbNecY
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright (C) 2000
InternalName: FlowerPower
FileVersion: 1, 0, 0, 1
CompanyName:
PrivateBuild:
LegalTrademarks:
Comments:
ProductName: FlowerPower
SpecialBuild:
ProductVersion: 1, 0, 0, 1
FileDescription: FlowerPower
OriginalFilename: FlowerPower.EXE
Translation: 0x0c09 0x04b0

Trojan.Win32.Zenpak also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
MicroWorld-eScan MemScan:Trojan.Agent.ECLV
FireEye Generic.mg.8ab5e6e5b50ba0e2
CAT-QuickHeal Trojan.Mauvaise.SL1
ALYac MemScan:Trojan.Agent.ECLV
Cylance Unsafe
Sangfor Malware
K7AntiVirus Trojan ( 005619a01 )
BitDefender MemScan:Trojan.Agent.ECLV
K7GW Trojan ( 005619a01 )
Cybereason malicious.5b50ba
BitDefenderTheta Gen:NN.ZexaF.34590.RoNfaGSD0tbi
Cyren W32/Agent.BAN.gen!Eldorado
Symantec Backdoor.Avecma
ESET-NOD32 Win32/VB.OSK
APEX Malicious
Avast Sf:ShellCode-CU [Trj]
ClamAV Win.Malware.Ursu-6793772-0
Kaspersky HEUR:Trojan.Win32.Zenpak.gen
NANO-Antivirus Trojan.Win32.Inject3.fqtflc
Rising Trojan.Injector!1.B53C (CLASSIC)
Ad-Aware MemScan:Trojan.Agent.ECLV
Sophos Troj/Agent-BCEE
Comodo TrojWare.Win32.Injector.AVPL@8d26g3
DrWeb Trojan.Inject3.16347
VIPRE Trojan.Win32.Generic!BT
Invincea ML/PE-A + Troj/Agent-BCEE
McAfee-GW-Edition BehavesLike.Win32.Ransomware.vc
Emsisoft MemScan:Trojan.Agent.ECLV (B)
Ikarus VirTool.Win32.CeeInject.A
Jiangmin Trojan.Nymaim.exo
MaxSecure Trojan.Malware.121218.susgen
Avira BDS/Poison.mon
MAX malware (ai score=84)
Microsoft Trojan:Win32/Skeeeyah!rfn
Arcabit Trojan.Agent.ECLV
AhnLab-V3 Malware/Win32.RL_Generic.R273894
ZoneAlarm HEUR:Trojan.Win32.Zenpak.gen
GData MemScan:Trojan.Agent.ECLV
Acronis suspicious
McAfee Artemis!8AB5E6E5B50B
VBA32 SScope.Trojan.Hlux
Panda Trj/Genetic.gen
Zoner Trojan.Win32.89366
Tencent Malware.Win32.Gencirc.10b07bba
Yandex Trojan.GenAsa!jwQBWYdc2PY
SentinelOne DFI – Malicious PE
eGambit Trojan.Generic
Fortinet W32/GenKryptik.DJNF!tr
Webroot W32.Malware.Gen
AVG Sf:ShellCode-CU [Trj]
CrowdStrike win/malicious_confidence_90% (D)
Qihoo-360 HEUR/QVM11.1.D427.Malware.Gen

How to remove Trojan.Win32.Zenpak ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

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 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

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

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

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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