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

What is UDS:Trojan-Ransom.Win32.Petr.sb infection?

In this article you will certainly find regarding the definition of UDS:Trojan-Ransom.Win32.Petr.sb and also its negative impact on your computer system. Such ransomware are a form of malware that is elaborated by on-line fraudulences to require paying the ransom by a sufferer.

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Most of the cases, UDS:Trojan-Ransom.Win32.Petr.sb infection will advise its victims to start funds transfer for the purpose of neutralizing the changes that the Trojan infection has actually introduced to the victim’s tool.

UDS:Trojan-Ransom.Win32.Petr.sb Summary

These adjustments 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.
  • 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.
  • Likely installs a bootkit via raw harddisk modifications;
  • Attempts to restart the guest VM;
  • 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.
  • Attempts to identify installed AV products by installation directory;
  • Mimics icon used for popular non-executable file format;
  • 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 disk — so the victim can no longer use the information;
  • Preventing normal 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.


One of the most common channels whereby UDS:Trojan-Ransom.Win32.Petr.sb Trojans are infused are:

  • By ways of phishing emails;
  • As a consequence of user ending up on a source that holds a harmful software program;

As quickly as the Trojan is successfully injected, it will either cipher the information on the target’s computer or stop the gadget from functioning in a proper manner – while additionally putting a ransom note that mentions the need for the targets to effect the payment for the function of decrypting the documents or bring back the documents system back to the initial problem. In many instances, the ransom money note will certainly come up when the customer restarts the COMPUTER after the system has currently been damaged.

UDS:Trojan-Ransom.Win32.Petr.sb distribution channels.

In numerous corners of the world, UDS:Trojan-Ransom.Win32.Petr.sb grows by leaps and bounds. However, the ransom notes as well as methods of obtaining the ransom money quantity might differ depending on certain local (local) setups. The ransom money notes and techniques of extorting the ransom amount might differ depending on certain neighborhood (regional) settings.

Ransomware injection

For instance:

    Faulty notifies concerning unlicensed software.

    In certain areas, the Trojans usually wrongfully report having actually found some unlicensed applications allowed on the sufferer’s tool. The alert after that demands the individual to pay the ransom.

    Faulty statements concerning illegal content.

    In countries where software application piracy is much less prominent, this method is not as effective for the cyber scams. Conversely, the UDS:Trojan-Ransom.Win32.Petr.sb popup alert may falsely claim to be deriving from a police institution and also will certainly report having located child porn or other illegal data on the tool.

    UDS:Trojan-Ransom.Win32.Petr.sb popup alert may falsely declare to be deriving from a regulation enforcement institution and also will certainly report having situated child porn or various other prohibited information on the gadget. The alert will similarly include a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: BB5E26B9
md5: e172f063026ba4cbb3e10ef3d0e23a7f
name: E172F063026BA4CBB3E10EF3D0E23A7F.mlw
sha1: 2e90c54f4b058b090542f3f30385e01078229fc0
sha256: a8ee738bbd43982801b3b7b7cebc589f04257f6cb8d90120cc5d2fced2cc954e
sha512: 70eb97a2675ab8b9897631e1ab126d38d287beb50b565aeaa30b6f87e8a8dbbbc00c40dc81793abbd7b9043d7ae0d482723252aac9176ddb4e68a6acb3f7ee6e
ssdeep: 24576:lImR3Ds/JaW1YTirTy9KJ+UsrTo3XuSKqLRuV2:qmdsRzdZIUgoO0Rug
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2003-2013
InternalName: AutoHotkey
ProductName: AutoHotkey
FileDescription: AutoHotkey Unicode 32-bit
OriginalFilename: AutoHotkey.exe
Translation: 0x0409 0x04b0

UDS:Trojan-Ransom.Win32.Petr.sb also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004efa661 )
DrWeb Trojan.Encoder.4544
Cynet Malicious (score: 99)
CAT-QuickHeal Ransom.Petya.MUE.S4
Cylance Unsafe
K7GW Trojan ( 004efa661 )
Cybereason malicious.f4b058
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Diskcoder.Petya.C
APEX Malicious
Avast FileRepMalware
ClamAV Win.Dropper.Petya-3
Kaspersky UDS:Trojan-Ransom.Win32.Petr.sb
NANO-Antivirus Trojan.Win32.Encoder.ezbvlp
Tencent Malware.Win32.Gencirc.11491b45
Sophos Mal/Generic-S
Comodo Malware@#17399se49riz2
F-Secure Trojan.TR/Ransom.jktso
BitDefenderTheta Gen:NN.ZexaF.34738.7q0@aOx2H6ji
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Dropper.dh
FireEye Generic.mg.e172f063026ba4cb
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.Generic.btmcd
Avira TR/Ransom.jktso
Antiy-AVL Trojan/Generic.ASMalwS.25136F5
Microsoft Ransom:Win32/Mischa.A
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
McAfee Ransomware-FKM!E172F063026B
MAX malware (ai score=100)
Panda Trj/CI.A
Yandex Trojan.Agent!3nU4OkH0TMM
Ikarus Trojan.Win32.Diskcoder
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Petya.HS!tr.ransom
AVG FileRepMalware
Paloalto generic.ml

How to remove UDS:Trojan-Ransom.Win32.Petr.sb ransomware?

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 UDS:Trojan-Ransom.Win32.Petr.sb 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 UDS:Trojan-Ransom.Win32.Petr.sb you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
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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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