What is Trojan:Win32/Sulunch!rfn infection?

In this article you will certainly find concerning the definition of Trojan:Win32/Sulunch!rfn and its unfavorable influence on your computer. Such ransomware are a type of malware that is clarified by online frauds to demand paying the ransom money by a victim.

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In the majority of the instances, Trojan:Win32/Sulunch!rfn virus will certainly instruct its targets to launch funds move for the purpose of neutralizing the modifications that the Trojan infection has introduced to the target’s gadget.

Trojan:Win32/Sulunch!rfn 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.
  • A process attempted to delay the analysis task.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Installs a browser addon or extension;
  • 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;
  • Sniffs keystrokes;
  • 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
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records found on the victim’s hard disk drive — so the target can no longer use the information;
  • Preventing regular accessibility to the sufferer’s workstation;


One of the most regular networks whereby Trojan:Win32/Sulunch!rfn Ransomware Trojans are infused are:

  • By means of phishing emails;
  • As a repercussion of customer ending up on a resource that hosts a malicious software;

As quickly as the Trojan is effectively infused, it will certainly either cipher the information on the sufferer’s PC or protect against the gadget from functioning in a proper manner – while also putting a ransom note that discusses the need for the victims to impact the repayment for the objective of decrypting the records or bring back the data system back to the preliminary problem. In many circumstances, the ransom note will show up when the customer reboots the COMPUTER after the system has actually currently been damaged.

Trojan:Win32/Sulunch!rfn circulation channels.

In various edges of the world, Trojan:Win32/Sulunch!rfn grows by leaps and also bounds. However, the ransom notes as well as methods of obtaining the ransom money amount might differ depending upon certain neighborhood (local) setups. The ransom money notes and tricks of obtaining the ransom quantity might differ depending on certain local (regional) settings.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software application.

    In certain areas, the Trojans usually wrongfully report having discovered some unlicensed applications enabled on the victim’s tool. The sharp then demands the individual to pay the ransom money.

    Faulty statements regarding prohibited web content.

    In countries where software application piracy is much less popular, this method is not as reliable for the cyber frauds. Additionally, the Trojan:Win32/Sulunch!rfn popup alert might wrongly assert to be originating from a law enforcement institution as well as will report having located child pornography or various other prohibited information on the device.

    Trojan:Win32/Sulunch!rfn popup alert may wrongly declare to be acquiring from a law enforcement establishment as well as will report having located kid porn or other prohibited information on the device. The alert will similarly consist of a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: 8901DB4D
md5: c8e00c8d6a6ef7ece263a8d01cb65cf0
name: C8E00C8D6A6EF7ECE263A8D01CB65CF0.mlw
sha1: 13b4b03612cea3441410e1eda8d135d1710a3f0c
sha256: 51dc024e250c6f001869fc436ac7cee2a9d101be7cd58d8fee6a721280ee8ddb
sha512: d93386b7e6e3ba6c66eb33cfe1d82bc5329e12fac9f5b7c2cf37840c5dd5e52200af49980ecef14d3411e4f2e6f14182421173b74a0097bf7c2f136265744fa4
ssdeep: 384:PWIRHvwI/aiYe/6xRdWyhSgzfjIS1tvOjqWm+zKtWvfaO3lDKWylEaWBbuKffWO:1//aibC0y8sfGqWm1tyCOayyKR
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0409 0x04b0
InternalName: dic3
FileVersion: 1.00
CompanyName: Micro
ProductName: Project1
ProductVersion: 1.00
OriginalFilename: dic3.exe

Trojan:Win32/Sulunch!rfn also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 0001140e1 )
Elastic malicious (high confidence)
DrWeb Trojan.AVKill.32311
Cynet Malicious (score: 90)
ALYac Generic.Malware.S2g.8A7E7770
Cylance Unsafe
Zillya Trojan.Blocker.Win32.9581
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/Blocker.bde4a3c2
K7GW Trojan ( 0001140e1 )
Cybereason malicious.d6a6ef
Cyren W32/Trojan.KYWF-5643
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/LockScreen.AYO
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.brol
BitDefender Generic.Malware.S2g.8A7E7770
NANO-Antivirus Trojan.Win32.FKM.bwsflh
MicroWorld-eScan Generic.Malware.S2g.8A7E7770
Tencent Win32.Trojan.Blocker.Tbsa
Ad-Aware Generic.Malware.S2g.8A7E7770
Sophos Mal/Generic-R
Comodo Malware@#2f3q99zit0s0t
BitDefenderTheta Gen:NN.ZevbaF.34628.cm0@aC4uzbci
VIPRE Trojan.Win32.Generic!BT
TrendMicro TROJ_SPNR.14GI13
Emsisoft Generic.Malware.S2g.8A7E7770 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Suspicious.Heur
Avira TR/Crypt.FKM.Gen
eGambit Unsafe.AI_Score_100%
Kingsoft Win32.HeurC.KVM006.a.(kcloud)
Microsoft Trojan:Win32/Sulunch!rfn
Arcabit Generic.Malware.S2g.8A7E7770
AegisLab Trojan.Win32.Blocker.tpKk
GData Generic.Malware.S2g.8A7E7770
AhnLab-V3 Trojan/Win32.Blocker.C184203
McAfee Artemis!C8E00C8D6A6E
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Panda Trj/CI.A
TrendMicro-HouseCall TROJ_SPNR.14GI13
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.GenAsa!H/ekJOqCckY
Ikarus Trojan.Win32.LockScreen
AVG Win32:Malware-gen
Qihoo-360 HEUR/Malware.QVM06.Gen

How to remove Trojan:Win32/Sulunch!rfn 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 Trojan:Win32/Sulunch!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:

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If the guide doesn’t help you to remove Trojan:Win32/Sulunch!rfn you can always ask me in the comments for getting help.

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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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