Ransom:Win32/Esulat.A!rfn

Written by Robert Bailey

What is Ransom:Win32/Esulat.A!rfn infection?

In this article you will certainly discover regarding the definition of Ransom:Win32/Esulat.A!rfn as well as its unfavorable influence on your computer. Such ransomware are a form of malware that is specified by online scams to require paying the ransom by a target.

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Most of the cases, Ransom:Win32/Esulat.A!rfn infection will certainly advise its sufferers to initiate funds move for the objective of reducing the effects of the amendments that the Trojan infection has presented to the target’s gadget.

Ransom:Win32/Esulat.A!rfn 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.
  • 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.
  • Attempts to remove evidence of file being downloaded from the Internet;
  • 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
  • Exhibits possible ransomware file modification behavior;
  • Writes a potential ransom message to disk;
  • Creates a copy of itself;
  • Appends a known CryptFile2 ransomware file extension to files that have been encrypted;
  • Creates a known CryptFile2 ransomware decryption instruction / key file.;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the victim’s hard drive — so the victim can no more utilize the data;
  • 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.

Ransom:Win32/Esulat.A!rfn

One of the most regular channels where Ransom:Win32/Esulat.A!rfn Ransomware are injected are:

  • By ways of phishing e-mails;
  • As a consequence of customer ending up on a resource that hosts a malicious software application;

As soon as the Trojan is efficiently injected, it will either cipher the information on the victim’s computer or stop the gadget from functioning in a proper manner – while additionally placing a ransom money note that mentions the requirement for the targets to impact the settlement for the purpose of decrypting the documents or bring back the file system back to the preliminary condition. In most circumstances, the ransom money note will show up when the customer reboots the COMPUTER after the system has actually currently been harmed.

Ransom:Win32/Esulat.A!rfn distribution channels.

In various edges of the world, Ransom:Win32/Esulat.A!rfn grows by jumps and bounds. Nevertheless, the ransom notes and also tricks of extorting the ransom money quantity might vary depending upon certain neighborhood (local) setups. The ransom money notes and also tricks of obtaining the ransom money amount may differ depending on specific neighborhood (local) settings.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software program.

    In particular locations, the Trojans frequently wrongfully report having actually found some unlicensed applications made it possible for on the sufferer’s device. The alert then requires the user to pay the ransom.

    Faulty statements regarding unlawful web content.

    In nations where software piracy is less preferred, this approach is not as effective for the cyber fraudulences. Additionally, the Ransom:Win32/Esulat.A!rfn popup alert may incorrectly claim to be deriving from a police establishment and also will report having situated youngster pornography or various other unlawful information on the device.

    Ransom:Win32/Esulat.A!rfn popup alert may falsely declare to be acquiring from a legislation enforcement organization and also will report having located child pornography or other prohibited data on the tool. The alert will similarly have a need for the individual to pay the ransom.

Technical details

File Info:

crc32: AF7590D8
md5: df80cbaadb754de14c97dc05995fdc4a
name: DF80CBAADB754DE14C97DC05995FDC4A.mlw
sha1: 6f9369c9d2f174b4abd642d4fb43cff690f364df
sha256: 43fbc1ee5c4ef4a5bfdbbd67407c4364e6cf205475250f97138f55db4c77002c
sha512: cccf010d4344bd574dea5a254800207b8603b1ff2dcae8d4b341c4368976544ebee9fc68632701be3ab41098ab0c6b64f2b61f27063a068777e3bc440bac01d7
ssdeep: 1536:umsz2jF1PzSg1dPVHT4MVyU3NJZfA1111111bilpPXvlMq12Kpuyjg1kFa:hdPV8uyU3zJA1111111bilpPX6q2y8k
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

ProductVersion: 1,2,9,4
FileDescription: OreasSofts
FileVersion: 1,2,9,4
CompanyName: SynaicosSoft, Corporation.
Translation: 0x040e 0x04e5

Ransom:Win32/Esulat.A!rfn also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 0055e3ef1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.6033
Cynet Malicious (score: 100)
CAT-QuickHeal Ransomware.Tescrypt.WR5
ALYac Trojan.Ransom.Snocry
Cylance Unsafe
Zillya Trojan.Snocry.Win32.431
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba Ransom:Win32/generic.ali2000010
K7GW Trojan ( 0055e3ef1 )
Cybereason malicious.adb754
Cyren W32/Bitwall.IHPO-3464
Symantec Ransom.CryptXXX
ESET-NOD32 Win32/Filecoder.HydraCrypt.C
APEX Malicious
Avast FileRepMalware
Kaspersky Trojan-Spy.Win32.BitWall.wk
BitDefender Gen:Heur.Mint.Dreidel.gy0@x0rKigoi
NANO-Antivirus Trojan.Win32.Dwn.egorgb
ViRobot Trojan.Win32.Z.Snocry.98304
MicroWorld-eScan Gen:Heur.Mint.Dreidel.gy0@x0rKigoi
Tencent Malware.Win32.Gencirc.114b6caa
Ad-Aware Gen:Heur.Mint.Dreidel.gy0@x0rKigoi
Sophos ML/PE-A + Troj/Ransom-DVA
Comodo Malware@#1wwyk4ef2wdrs
BitDefenderTheta Gen:NN.ZexaF.34628.gy0@a0rKigoi
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_CRYPHYDRA.D
McAfee-GW-Edition BehavesLike.Win32.Generic.nh
FireEye Generic.mg.df80cbaadb754de1
Emsisoft Gen:Heur.Mint.Dreidel.gy0@x0rKigoi (B)
Jiangmin Trojan.Snocry.by
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1113593
eGambit Unsafe.AI_Score_89%
Kingsoft Win32.Troj.Gener.(kcloud)
Microsoft Ransom:Win32/Esulat.A!rfn
GData Gen:Heur.Mint.Dreidel.gy0@x0rKigoi
AhnLab-V3 Trojan/Win32.Crypt.R188174
Acronis suspicious
McAfee Ransomware-FSB!DF80CBAADB75
MAX malware (ai score=100)
VBA32 Trojan.Downloader
Malwarebytes Malware.Heuristic.1001
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_CRYPHYDRA.D
Rising Ransom.FileCryptor!8.1A7 (KTSE)
Yandex Trojan.GenAsa!Syxx+g1hAm8
Ikarus Trojan.Win32.Filecoder
Fortinet W32/Kryptik.FGQU!tr
AVG FileRepMalware
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Generic.HgIASOUA

How to remove Ransom:Win32/Esulat.A!rfn 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

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 Ransom:Win32/Esulat.A!rfn 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 Ransom:Win32/Esulat.A!rfn 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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