Win32/Virlock.C

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

What is Win32/Virlock.C infection?

In this post you will certainly locate regarding the definition of Win32/Virlock.C and its negative impact on your computer. Such ransomware are a kind of malware that is specified by online frauds to demand paying the ransom money by a victim.

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Most of the cases, Win32/Virlock.C virus will certainly advise its targets to initiate funds transfer for the purpose of reducing the effects of the changes that the Trojan infection has introduced to the victim’s gadget.

Win32/Virlock.C Summary

These modifications can be as follows:

  • Executable code extraction;
  • Attempts to connect to a dead IP:Port (3 unique times);
  • Creates RWX memory;
  • Detected script timer window indicative of sleep style evasion;
  • Expresses interest in specific running processes;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Reads data out of its own binary image;
  • A process created a hidden window;
  • Drops a binary and executes it;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data.;
  • The executable is compressed using UPX;
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • A process attempted to delay the analysis task by a long amount of time.;
  • Attempts to repeatedly call a single API many times in order to delay analysis time;
  • Installs itself for autorun at Windows startup;
  • Creates a hidden or system file;
  • Likely virus infection of existing system binary;
  • Attempts to disable UAC;
  • Attempts to modify Explorer settings to prevent file extensions from being displayed;
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents found on the target’s disk drive — so the target can no more utilize the information;
  • Preventing normal accessibility to the victim’s workstation;

Win32/Virlock.C

One of the most typical channels through which Win32/Virlock.C Ransomware are injected are:

  • By methods of phishing emails;
  • As a consequence of user winding up on a resource that organizes a destructive software application;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the sufferer’s PC or prevent the tool from working in a proper way – while also placing a ransom money note that discusses the demand for the victims to effect the payment for the function of decrypting the papers or restoring the file system back to the initial problem. In a lot of instances, the ransom money note will certainly show up when the client reboots the PC after the system has actually currently been harmed.

Win32/Virlock.C distribution channels.

In numerous edges of the globe, Win32/Virlock.C expands by leaps as well as bounds. Nevertheless, the ransom money notes as well as techniques of extorting the ransom money quantity might differ relying on certain neighborhood (regional) settings. The ransom money notes as well as methods of obtaining the ransom money quantity might differ depending on specific local (local) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software program.

    In particular areas, the Trojans usually wrongfully report having discovered some unlicensed applications made it possible for on the victim’s gadget. The sharp then demands the user to pay the ransom.

    Faulty declarations regarding prohibited content.

    In countries where software piracy is much less prominent, this approach is not as reliable for the cyber frauds. Alternatively, the Win32/Virlock.C popup alert may wrongly assert to be originating from a police establishment and also will report having situated kid pornography or other unlawful information on the gadget.

    Win32/Virlock.C popup alert may falsely declare to be deriving from a law enforcement establishment as well as will report having situated youngster pornography or other prohibited information on the device. The alert will likewise consist of a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 8D9D9F9C
md5: 04f6cd9b651bde4a46cc7d5fa37b5a4c
name: 04F6CD9B651BDE4A46CC7D5FA37B5A4C.mlw
sha1: 033a6c05561e21241e67c9efb83b2a0d92db6891
sha256: dd596f5456a74b70aa1c39ca70bc060a945d42d789d50adddad717f7f55e55f5
sha512: fc24b0de78409ec49ef9ff8323689ef452c4b3b186d8eac46dacf4504d7cf6739a9a2dc8ecd422d3f6dc9a9dd6b8637753a59a39013ba58f5ff2f6215c5f5d1d
ssdeep: 12288:dIjsPukUE+Oab3/FKMEQX6ch/rdMysxK8coIMQrSmi/S8XiK:CjsGkUJz7EQPxdMyOKKa3i//SK
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Win32/Virlock.C also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
K7AntiVirusVirus ( 0040f99f1 )
Elasticmalicious (high confidence)
DrWebTrojan.Packed.19696
CynetMalicious (score: 100)
CAT-QuickHealRansom.PolyRansom.B2
ALYacGen:Trojan.Heur.RP.TmGfb84mdtni
CylanceUnsafe
SangforTrojan.Win32.Save.a
K7GWVirus ( 0040f99f1 )
Cybereasonmalicious.b651bd
CyrenW32/A-eb557c81!Eldorado
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/Virlock.C
APEXMalicious
AvastWin32:VirLock [Inf]
ClamAVBC.Win.Virus.Ransom-9157.B
KasperskyTrojan-Ransom.Win32.Blocker.idjr
BitDefenderGen:Trojan.Heur.RP.TmGfb84mdtni
NANO-AntivirusTrojan.Win32.PolyRansom.exypia
MicroWorld-eScanGen:Trojan.Heur.RP.TmGfb84mdtni
TencentWin32.Trojan.Blocker.Hfi
Ad-AwareGen:Trojan.Heur.RP.TmGfb84mdtni
SophosML/PE-A + W32/VirRnsm-A
BitDefenderThetaAI:Packer.82B2FCFB1F
VIPRETrojan.Win32.Generic.pak!cobra
TrendMicroPE_VIRLOCK.E
McAfee-GW-EditionBehavesLike.Win32.Generic.bc
FireEyeGeneric.mg.04f6cd9b651bde4a
EmsisoftGen:Trojan.Heur.RP.TmGfb84mdtni (B)
SentinelOneStatic AI – Malicious PE
JiangminTrojan.Blocker.cff
AviraHEUR/AGEN.1119578
eGambitUnsafe.AI_Score_100%
MicrosoftTrojanSpy:Win32/Ursnif
ArcabitTrojan.Heur.RP.TmGfb84mdtni
GDataGen:Trojan.Heur.RP.TmGfb84mdtni
TACHYONVirus/W32.VirRansom.C
AhnLab-V3Win32/Nabucur.B
McAfeeArtemis!04F6CD9B651B
MAXmalware (ai score=83)
VBA32Virus.VirLock
MalwarebytesPolyRansom.Virus.FileInfector.DDS
PandaTrj/CI.A
TrendMicro-HouseCallPE_VIRLOCK.E
IkarusVirus-Ransom.FileLocker
MaxSecureTrojan.Malware.300983.susgen
FortinetW32/Virlock.K
AVGWin32:VirLock [Inf]
Paloaltogeneric.ml

How to remove Win32/Virlock.C 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 Win32/Virlock.C 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/Virlock.C 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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