Written by Robert Bailey

What is TrojanRansom.Petr infection?

In this post you will discover regarding the definition of TrojanRansom.Petr as well as its negative impact on your computer system. Such ransomware are a form of malware that is clarified by on the internet fraudulences to demand paying the ransom by a target.

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In the majority of the cases, TrojanRansom.Petr virus will certainly instruct its sufferers to start funds transfer for the purpose of reducing the effects of the amendments that the Trojan infection has actually introduced to the victim’s tool.

TrojanRansom.Petr Summary

These modifications 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.
  • Possible date expiration check, exits too soon after checking local time;
  • 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.
  • 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.
  • Uses Windows utilities for basic functionality;
  • Attempts to restart the guest VM;
  • 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
  • Unusual version info supplied for binary;
  • Ciphering the documents found on the sufferer’s hard drive — so the target can no more utilize the information;
  • Preventing normal accessibility 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 typical channels through which TrojanRansom.Petr are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of customer ending up on a source that hosts a malicious software application;

As soon as the Trojan is effectively injected, it will certainly either cipher the information on the sufferer’s PC or stop the tool from operating in a correct manner – while likewise putting a ransom note that discusses the demand for the sufferers to effect the settlement for the function of decrypting the records or restoring the file system back to the preliminary problem. In many instances, the ransom money note will certainly come up when the customer restarts the PC after the system has actually currently been damaged.

TrojanRansom.Petr circulation channels.

In different corners of the world, TrojanRansom.Petr expands by jumps as well as bounds. Nonetheless, the ransom money notes and methods of extorting the ransom money amount might differ relying on certain neighborhood (regional) settings. The ransom money notes and also methods of extorting the ransom money amount might differ depending on specific regional (local) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software.

    In particular areas, the Trojans frequently wrongfully report having discovered some unlicensed applications enabled on the target’s tool. The alert then requires the customer to pay the ransom money.

    Faulty statements about unlawful content.

    In countries where software piracy is less prominent, this technique is not as effective for the cyber scams. Alternatively, the TrojanRansom.Petr popup alert might incorrectly declare to be originating from a police institution and will certainly report having situated kid porn or other illegal data on the device.

    TrojanRansom.Petr popup alert may falsely assert to be deriving from a regulation enforcement institution and will certainly report having situated child pornography or various other illegal information on the device. The alert will likewise contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 495873BB
md5: 2b82f4dfcfbf40f412e0302d2bcaf21f
name: 2B82F4DFCFBF40F412E0302D2BCAF21F.mlw
sha1: 947799d1fd5a5f8de888c831a2d833da2f6d0809
sha256: 8f43e8da6b189e9295ba059cd9771edb32b2d42e77efe9e80f783c83ef847b55
sha512: 25e4974390ac7a2a46f7c785969dae14242e027eb37e1fb50000cb2e2bbd9d3b896aebad1a7654afe9da3bc4c7ab4afdb5a7d2e5dfb27ecedbe676359da15c65
ssdeep: 1536:BzW+UWvxY9Qgu9iLoLSGnH/Ss5gpZRWWjILJggc3M8ZCMzbcJyeI0Ti:BzW+DiC9iLo+GnH/75QZRWzgbVrIT
type: PE32 executable (GUI) Intel 80386, for MS Windows, MS CAB-Installer self-extracting archive

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: Wextract
FileVersion: 8.00.7600.16385 (win7_rtm.090713-1255)
CompanyName: Micwosofwt Cwooperashawn
ProductName: Windowsxae Internet Explorer
ProductVersion: 8.00.7600.16385
FileDescription: Wyndowz Updat
OriginalFilename: WEXTRACT.EXE .MUI
Translation: 0x0409 0x04b0

TrojanRansom.Petr also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 004e19001 )
Elastic malicious (high confidence)
DrWeb Trojan.Siggen7.57150
Cynet Malicious (score: 99)
Cylance Unsafe
Zillya Adware.Generic.Win32.65888
Alibaba Ransom:Win32/Petya.a6f91b54
K7GW Trojan ( 004e19001 )
Cybereason malicious.1fd5a5
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Diskcoder.Petya.A
APEX Malicious
Avast MBR:Ransom-C [Trj]
Kaspersky Trojan-Ransom.Win32.Petr.aqv
NANO-Antivirus Trojan.Win32.Diskcoder.fhbqwx
Tencent Win32.Trojan.Petr.Htck
Sophos Generic PUA JE (PUA)
Comodo Malware@#3eje6125c5l5x
SentinelOne Static AI – Suspicious SFX
Jiangmin AdWare.Generic.svgg
Avira TR/Dropper.Gen
Microsoft Ransom:Win32/Petya.A
AegisLab Trojan.Win32.Petr.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
McAfee Artemis!2B82F4DFCFBF
MAX malware (ai score=100)
VBA32 TrojanRansom.Petr
Malwarebytes Malware.Heuristic.1001
Panda Trj/CI.A
Rising Ransom.Petya!8.48D7 (CLOUD)
Yandex Trojan.Petr!4LisUKgEc2E
Ikarus Trojan-Downloader.Win32.Banload
Fortinet W32/Petya.A!tr.ransom
AVG MBR:Ransom-C [Trj]
Qihoo-360 Win32/Ransom.Generic.HwYDEpsA

How to remove TrojanRansom.Petr 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

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 TrojanRansom.Petr 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 TrojanRansom.Petr 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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