Backdoor:Win32/Simda

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

What is Backdoor:Win32/Simda infection?

In this article you will certainly discover concerning the meaning of Backdoor:Win32/Simda and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is specified by on the internet scams to require paying the ransom by a target.

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Most of the situations, Backdoor:Win32/Simda infection will certainly instruct its targets to initiate funds move for the function of counteracting the amendments that the Trojan infection has presented to the victim’s gadget.

Backdoor:Win32/Simda Summary

These alterations can be as adheres to:

  • Unconventionial language used in binary resources: Russian;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers found on the target’s disk drive — so the target can no more use the data;
  • 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.

Backdoor:Win32/Simda

The most regular networks where Backdoor:Win32/Simda are infused are:

  • By methods of phishing emails;
  • As an effect of user ending up on a resource that hosts a destructive software application;

As soon as the Trojan is efficiently infused, it will certainly either cipher the data on the victim’s PC or stop the tool from functioning in a proper way – while likewise positioning a ransom money note that points out the need for the sufferers to effect the payment for the objective of decrypting the papers or restoring the data system back to the preliminary condition. In most instances, the ransom money note will show up when the client restarts the PC after the system has already been damaged.

Backdoor:Win32/Simda circulation networks.

In different edges of the world, Backdoor:Win32/Simda grows by jumps and bounds. Nevertheless, the ransom money notes and also techniques of obtaining the ransom money amount may vary depending on certain neighborhood (regional) settings. The ransom money notes as well as tricks of obtaining the ransom money amount might differ depending on particular regional (local) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software application.

    In certain locations, the Trojans typically wrongfully report having discovered some unlicensed applications made it possible for on the victim’s gadget. The sharp then requires the user to pay the ransom money.

    Faulty statements regarding unlawful material.

    In countries where software program piracy is much less prominent, this method is not as effective for the cyber fraudulences. Conversely, the Backdoor:Win32/Simda popup alert might incorrectly declare to be deriving from a law enforcement organization as well as will report having situated youngster pornography or various other unlawful information on the gadget.

    Backdoor:Win32/Simda popup alert may falsely claim to be deriving from a regulation enforcement institution as well as will report having situated youngster pornography or various other illegal data on the gadget. The alert will likewise have a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 8BC8DAF1
md5: 3257a1ffef87f9eb12e89ef8fd55fadf
name: 3257A1FFEF87F9EB12E89EF8FD55FADF.mlw
sha1: 48962f481ed9b27616a1d645ab9864ace98162e3
sha256: 9d98acc268709013dd7f463a173ce91bfb286f37c9f92687d0b8040bb0638a2c
sha512: 8ab5da30df9da2a20a7b9a9411210e1d394898be07e83714fb22159f410bed7a35f2570274de199f3d3d29408b3e555e4281c9fd43f329aebc4021d08bac2ff6
ssdeep: 12288:afFf7mVBixFVv/a1st4rBdTMvEpLX4DiIdC1K+oINh7je5ExgT/:8Ff7jxHaFrXMiJ1WahveD
type: PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows

Version Info:

0: [No Data]

Backdoor:Win32/Simda also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Backdoor ( 0040f57c1 )
Elastic malicious (high confidence)
DrWeb Trojan.Rodricter.21
Cynet Malicious (score: 100)
ALYac Gen:Variant.Razy.85541
Cylance Unsafe
Zillya Trojan.Simda.Win32.289
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Backdoor:Win32/Simda.2b0ae468
K7GW Backdoor ( 0040f57c1 )
Cybereason malicious.fef87f
Cyren W32/Simda.AD.gen!Eldorado
Symantec Trojan.FakeAV!gen95
ESET-NOD32 Win32/Simda.B
APEX Malicious
Avast Win32:Simda-IS [Trj]
ClamAV Win.Trojan.Simda-632
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Razy.85541
NANO-Antivirus Trojan.Win32.Rodricter.cqxxuz
ViRobot Backdoor.Win32.A.Simda.756224.A
MicroWorld-eScan Gen:Variant.Razy.85541
Tencent Win32.Trojan.Generic.Lhnb
Ad-Aware Gen:Variant.Razy.85541
Sophos ML/PE-A + Mal/Simda-G
Comodo Backdoor.Win32.Simda.PFL@4t3hi7
BitDefenderTheta Gen:NN.ZexaF.34628.UyW@a0cuCmoc
VIPRE Backdoor.Win32.Simda.b (v)
TrendMicro TROJ_SPNR.11AE13
McAfee-GW-Edition BehavesLike.Win32.Trojan.bc
FireEye Generic.mg.3257a1ffef87f9eb
Emsisoft Gen:Variant.Razy.85541 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor/Simda.lf
Webroot W32.Rogue.Gen
Avira TR/Crypt.XPACK.Gen
eGambit Unsafe.AI_Score_83%
Kingsoft Win32.Heur.KVMH004.a.(kcloud)
Microsoft Backdoor:Win32/Simda
AegisLab Trojan.Win32.Simda.lKKi
GData Gen:Variant.Razy.85541
AhnLab-V3 Backdoor/Win32.Simda.R49261
McAfee Trojan-FARW!3257A1FFEF87
MAX malware (ai score=100)
VBA32 BScope.Trojan.Rodricter
Panda Trj/Ransom.AB
TrendMicro-HouseCall TROJ_SPNR.11AE13
Rising Backdoor.Simda!8.2D9 (CLOUD)
Ikarus Backdoor.Win32.Simda
MaxSecure Trojan.Malware.7164915.susgen
AVG Win32:Simda-IS [Trj]
Qihoo-360 HEUR/Malware.QVM20.Gen

How to remove Backdoor:Win32/Simda virus?

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 Backdoor:Win32/Simda 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 Backdoor:Win32/Simda 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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