Win32/Sirefef.T

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

What is Win32/Sirefef.T infection?

In this post you will locate regarding the definition of Win32/Sirefef.T and also its adverse influence on your computer. Such ransomware are a form of malware that is clarified by on-line scams to require paying the ransom money by a target.

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Most of the instances, Win32/Sirefef.T infection will certainly advise its targets to start funds transfer for the function of reducing the effects of the modifications that the Trojan infection has actually introduced to the victim’s gadget.

Win32/Sirefef.T Summary

These modifications can be as adheres to:

  • 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.
  • 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.

  • Performs some HTTP requests;
  • Crashed cuckoomon during analysis. Report this error to the Github repo.;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the sufferer’s disk drive — so the victim can no more use the data;
  • Preventing routine 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.
Similar behavior
Related domains
z.whorecord.xyz Trojan.Ransom.AC
a.tomx.xyz Trojan.Ransom.AC
redirector.gvt1.com Trojan.Ransom.AC
r8—sn-bpb5oxu-3c2r.gvt1.com Trojan.Ransom.AC

Win32/Sirefef.T

One of the most typical channels where Win32/Sirefef.T are injected are:

  • By means of phishing emails;
  • As an effect of user ending up on a source that organizes a destructive software program;

As soon as the Trojan is efficiently infused, it will either cipher the data on the sufferer’s PC or avoid the device from working in an appropriate manner – while likewise positioning a ransom note that discusses the need for the sufferers to impact the repayment for the purpose of decrypting the papers or restoring the documents system back to the initial problem. In the majority of circumstances, the ransom money note will certainly show up when the client reboots the PC after the system has already been harmed.

Win32/Sirefef.T circulation networks.

In different edges of the globe, Win32/Sirefef.T expands by leaps as well as bounds. Nevertheless, the ransom notes and techniques of extorting the ransom amount may vary depending upon specific regional (regional) setups. The ransom notes and methods of extorting the ransom money quantity might differ depending on particular local (local) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software program.

    In specific areas, the Trojans commonly wrongfully report having actually found some unlicensed applications allowed on the sufferer’s tool. The sharp then requires the user to pay the ransom money.

    Faulty statements concerning prohibited material.

    In countries where software program piracy is much less preferred, this method is not as efficient for the cyber fraudulences. Conversely, the Win32/Sirefef.T popup alert might incorrectly assert to be stemming from a law enforcement establishment as well as will report having situated kid pornography or various other unlawful information on the gadget.

    Win32/Sirefef.T popup alert might incorrectly declare to be deriving from a legislation enforcement establishment and will report having situated child porn or various other prohibited information on the device. The alert will in a similar way consist of a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 955C1971
md5: 59d342ba160bd287370071a9c108fa74
name: 59D342BA160BD287370071A9C108FA74.mlw
sha1: 49466c925d63f46f6990e0e52c8e8a1ff0854ed6
sha256: 69146c4a6539069517da36a2d2430defd257978ea0bd5bd097c2edff7aa93df7
sha512: 9e389956eaf2f30fb4f849770cab83efb9107af8b479c5704d609c59c56d974de30348928e0fcf59c88f86e58681b971e6646077a99cb5141398e0e11d652dac
ssdeep: 3072:/DIsiVH2cVGX8YsRmEqhEj9Ecij9F16V3mc3K9pC7w9d604CiAq:/sJxFVGXBsR1B46V3mGKz9E0uAq
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Sirefef.T also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus RootKit ( 0012740f1 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader11.17736
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.AC
Cylance Unsafe
Zillya Trojan.Digitala.Win32.400
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Digitala.63585b0b
K7GW RootKit ( 0012740f1 )
Cybereason malicious.a160bd
Cyren W32/Risk.XJOI-6502
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Sirefef.T
APEX Malicious
Avast Win32:Ransom-L [Trj]
Kaspersky Trojan-Ransom.Win32.Digitala.bk
BitDefender Trojan.Ransom.AC
NANO-Antivirus Trojan.Win32.Digitala.cwglwj
MicroWorld-eScan Trojan.Ransom.AC
Tencent Win32.Trojan.Digitala.Szbv
Ad-Aware Trojan.Ransom.AC
Sophos Mal/Generic-R + Mal/EncPk-ZE
Comodo Malware@#8iiv6qsirqeh
BitDefenderTheta AI:Packer.FB43B8E71F
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.PWSZbot.ch
FireEye Generic.mg.59d342ba160bd287
Emsisoft Trojan.Ransom.AC (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/Digitala.ae
Webroot Trojan:Win32/Malat
Avira TR/Crypt.ZPACK.Gen
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Malat
AegisLab Trojan.Win32.Digitala.j!c
GData Trojan.Ransom.AC
TACHYON Trojan/W32.Digitala.172552
McAfee Artemis!59D342BA160B
MAX malware (ai score=100)
VBA32 Hoax.Digitala
Panda Generic Malware
Rising Ransom.Digitala!8.305 (CLOUD)
Yandex Trojan.GenAsa!aivIIjxBS28
Ikarus Trojan.Win32.Sirefef
Fortinet W32/Dx.LWK!tr
AVG Win32:Ransom-L [Trj]
Paloalto generic.ml

How to remove Win32/Sirefef.T 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 Win32/Sirefef.T 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 Win32/Sirefef.T 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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