Trojan.Win32.Yakes.pef

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

What is Trojan.Win32.Yakes.pef infection?

In this article you will certainly discover about the interpretation of Trojan.Win32.Yakes.pef as well as its negative effect on your computer system. Such ransomware are a type of malware that is elaborated by on the internet scams to demand paying the ransom by a target.

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In the majority of the situations, Trojan.Win32.Yakes.pef virus will certainly advise its targets to launch funds transfer for the objective of neutralizing the modifications that the Trojan infection has presented to the target’s gadget.

Trojan.Win32.Yakes.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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Attempts to connect to a dead IP:Port (1 unique times);
  • Presents an Authenticode digital signature;
  • 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;
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • A process created a hidden window;
  • Performs some HTTP requests;
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • A system process is generating network traffic likely as a result of process injection;
  • 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
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records situated on the victim’s hard drive — so the target can no more use 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.
Similar behavior
Related domains
z.whorecord.xyzRansom.Wannacry
a.tomx.xyzRansom.Wannacry
www.ip-adress.comRansom.Wannacry

Trojan.Win32.Yakes.pef

One of the most normal channels whereby Trojan.Win32.Yakes.pef Ransomware are infused are:

  • By means of phishing emails;
  • As a consequence of customer ending up on a resource that holds a destructive software;

As quickly as the Trojan is successfully injected, it will certainly either cipher the information on the sufferer’s PC or prevent the tool from working in an appropriate manner – while additionally putting a ransom money note that points out the requirement for the targets to impact the settlement for the objective of decrypting the papers or bring back the data system back to the preliminary problem. In many circumstances, the ransom money note will come up when the customer restarts the COMPUTER after the system has actually currently been harmed.

Trojan.Win32.Yakes.pef distribution channels.

In numerous corners of the world, Trojan.Win32.Yakes.pef expands by leaps as well as bounds. Nonetheless, the ransom money notes and also methods of obtaining the ransom amount may differ relying on certain local (local) settings. The ransom notes as well as tricks of obtaining the ransom money amount may differ depending on certain neighborhood (local) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software program.

    In specific locations, the Trojans often wrongfully report having found some unlicensed applications allowed on the victim’s device. The alert then demands the user to pay the ransom.

    Faulty declarations concerning prohibited web content.

    In nations where software piracy is less prominent, this technique is not as efficient for the cyber scams. Alternatively, the Trojan.Win32.Yakes.pef popup alert may incorrectly declare to be stemming from a law enforcement establishment as well as will certainly report having situated kid porn or various other illegal information on the gadget.

    Trojan.Win32.Yakes.pef popup alert might falsely assert to be acquiring from a legislation enforcement institution and will report having located kid porn or other prohibited information on the device. The alert will likewise contain a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 306D513E
md5: 4e56259cfb051a9f9c9fa76bc5fd80df
name: upload_file
sha1: 26aef3950f2fee9ca14b80af9a5889d59f6c0d48
sha256: df1d0bc581e578ac3b0c95b7eab8ea7b293b1d52ef30281bc71d5b93bcde2bf3
sha512: ebeba402ab229ed1113e623175c054ddedbb34aecda1c419e6ab991ccf63052fd683d2a5c1f715b931b76b50a563a66fc51d0064cd7623dd060b63b62f6c555a
ssdeep: 6144:ISj19QP9G+wgVFGOBD+Tl/Qa8Vx+z0JxR7xMJz/qffNNuZxXYDR38x5+jg0M:ISj1KA+wg9BD+TVGczIhxMKqo3Pjg0M
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: credwiz.exe
FileVersion: 6.1.7600.16385 (win7_rtm.090713-1255)
CompanyName: Microsoft Corporation
ProductName: Microsoftxae Windowsxae Operating System
ProductVersion: 6.1.7600.16385
FileDescription: Credential Backup and Restore Wizard
OriginalFilename: credwiz.exe
Translation: 0x0409 0x04b0

Trojan.Win32.Yakes.pef also known as:

GridinSoftTrojan.Ransom.Gen
Elasticmalicious (high confidence)
MicroWorld-eScanGen:Variant.Razy.766244
ALYacGen:Variant.Razy.766244
CylanceUnsafe
VIPRETrojan.Win32.Generic!BT
SangforMalware
K7AntiVirusTrojan ( 00570bfa1 )
BitDefenderGen:Variant.Razy.766244
K7GWTrojan ( 00570bfa1 )
CrowdStrikewin/malicious_confidence_60% (W)
TrendMicroBackdoor.Win32.QAKBOT.SM.hp
CyrenW32/Qbot.AA.gen!Eldorado
SymantecRansom.Wannacry
APEXMalicious
AvastWin32:DangerousSig [Trj]
ClamAVWin.Packed.Razy-9775294-0
KasperskyHEUR:Trojan.Win32.Yakes.pef
AlibabaTrojan:Win32/Qakbot.629dc32b
RisingTrojan.Kryptik!1.CC55 (CLASSIC)
Ad-AwareGen:Variant.Razy.766244
SophosTroj/Qakbot-DU
Comodofls.noname@0
F-SecureTrojan.TR/AD.Qbot.vsbxk
DrWebTrojan.QakBot.11
InvinceaMal/Generic-R + Troj/Qakbot-DU
McAfee-GW-EditionBehavesLike.Win32.PinkSbot.rz
FireEyeGeneric.mg.4e56259cfb051a9f
EmsisoftMalCert.A (A)
IkarusTrojan.Win32.CryptInject
JiangminTrojan.Bsymem.agl
AviraTR/AD.Qbot.vsbxk
Antiy-AVLGrayWare/Win32.Kryptik.ehls
MicrosoftTrojan:Win32/Qakbot.AR!Cert
ArcabitTrojan.Razy.DBB124
ZoneAlarmHEUR:Trojan.Win32.Yakes.pef
GDataWin32.Trojan.PSE.1NPTMF
CynetMalicious (score: 100)
AhnLab-V3Trojan/Win32.Qakbot.C4204873
McAfeeW32/PinkSbot-HC!4E56259CFB05
MAXmalware (ai score=87)
VBA32BScope.Trojan.Inject
MalwarebytesBackdoor.Qbot
PandaTrj/Agent.AJS
ESET-NOD32a variant of Win32/GenCBL.CI
TrendMicro-HouseCallBackdoor.Win32.QAKBOT.SM.hp
TencentMalware.Win32.Gencirc.10ce09ec
SentinelOneDFI – Malicious PE
eGambitUnsafe.AI_Score_80%
FortinetW32/GenericKDZ.6939!tr
AVGWin32:DangerousSig [Trj]
Paloaltogeneric.ml
Qihoo-360Generic/Trojan.e7c

How to remove Trojan.Win32.Yakes.pef virus?

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.Yakes.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.Yakes.pef 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/comparison

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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