Backdoor:Win32/Zegost.CH

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

What is Backdoor:Win32/Zegost.CH infection?

In this article you will discover concerning the meaning of Backdoor:Win32/Zegost.CH as well as its unfavorable influence on your computer system. Such ransomware are a type of malware that is elaborated by on-line scams to require paying the ransom money by a target.

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In the majority of the instances, Backdoor:Win32/Zegost.CH ransomware will certainly instruct its targets to start funds transfer for the purpose of reducing the effects of the changes that the Trojan infection has presented to the sufferer’s gadget.

Backdoor:Win32/Zegost.CH Summary

These adjustments can be as follows:

  • 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.
  • Unconventionial binary language: Chinese (Simplified);
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • 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 documents located on the target’s hard disk — so the target can no more use the data;
  • Preventing normal 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.xyzVirus.Win32.Vundo
a.tomx.xyzVirus.Win32.Vundo

Backdoor:Win32/Zegost.CH

One of the most common networks where Backdoor:Win32/Zegost.CH are infused are:

  • By ways 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 successfully infused, it will either cipher the data on the sufferer’s computer or stop the tool from operating in a correct fashion – while additionally placing a ransom note that discusses the requirement for the victims to effect the repayment for the purpose of decrypting the records or recovering the data system back to the preliminary condition. In a lot of circumstances, the ransom money note will show up when the client restarts the PC after the system has actually already been damaged.

Backdoor:Win32/Zegost.CH circulation networks.

In different corners of the globe, Backdoor:Win32/Zegost.CH grows by leaps and bounds. Nevertheless, the ransom money notes as well as techniques of obtaining the ransom money amount may differ relying on particular local (regional) setups. The ransom notes as well as techniques of extorting the ransom amount might differ depending on particular neighborhood (regional) setups.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software program.

    In particular locations, the Trojans frequently wrongfully report having discovered some unlicensed applications enabled on the target’s device. The alert after that demands the customer to pay the ransom.

    Faulty statements regarding prohibited material.

    In countries where software piracy is less preferred, this technique is not as efficient for the cyber frauds. Conversely, the Backdoor:Win32/Zegost.CH popup alert might wrongly claim to be originating from a police institution and will report having located kid porn or various other illegal data on the device.

    Backdoor:Win32/Zegost.CH popup alert might falsely assert to be acquiring from a legislation enforcement establishment and also will report having situated kid pornography or other prohibited data on the gadget. The alert will likewise include a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: 1141BC04
md5: 77f8f67ad057a69a567b04b06d77e81c
name: 77F8F67AD057A69A567B04B06D77E81C.mlw
sha1: ce84b322bc9c1e592afcf7d84bb6089c90ed78fa
sha256: 6357f1cbfab364d3acb85389d732da4a1e090af33e3801f701aa4cfae790bde4
sha512: c51519a06591fe3ecbed0a71591d70988e4ebadfdf15b1df44427a8bd2217f30d0f2aa0db3c5c568170e5d9868ce4487bf145f2e9b02a147d217a6e91c5a43d2
ssdeep: 12288:60HKW5wwyPImzQ/+afpnRyY9jjU870aFbaY9xtzXepNgfA+pX:60HK0wwuFQZfpcYRzYaFv9xtzXeXgfA
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: java
InternalName: Copyright ? 2013
FileVersion: 7.0.110.21
CompanyName: Oracle Corporation
PrivateBuild:
LegalTrademarks:
Comments:
ProductName: Java(TM) Platform SE 7 U11
SpecialBuild:
ProductVersion: 7.0.110.21
FileDescription: Java(TM) Platform SE binary
OriginalFilename: java.exe
Translation: 0x0804 0x04b0

Backdoor:Win32/Zegost.CH also known as:

BkavW32.AIDetect.malware1
Elasticmalicious (high confidence)
CynetMalicious (score: 100)
CylanceUnsafe
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (W)
K7GWTrojan ( 004baa321 )
Cybereasonmalicious.2bc9c1
CyrenW32/Threat-HLLIE-based!Maximus
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/Packed.Enigma.AAA
APEXMalicious
AvastWin32:Trojan-gen
ClamAVWin.Trojan.Bifrose-9837535-0
KasperskyTrojan-GameThief.Win32.Magania.utzf
SophosMal/Generic-S
BitDefenderThetaGen:NN.ZexaF.34722.NC0aaSxGOvhb
TrendMicroTROJ_GEN.R005C0DF121
McAfee-GW-EditionBehavesLike.Win32.Sality.jc
FireEyeGeneric.mg.77f8f67ad057a69a
SentinelOneStatic AI – Suspicious PE
eGambitUnsafe.AI_Score_99%
MicrosoftBackdoor:Win32/Zegost.CH
GDataWin32.Trojan.Agent.EZC0PW
AhnLab-V3Backdoor/Win.Zegost.C4507386
McAfeeArtemis!77F8F67AD057
VBA32BScope.Trojan.Downloader
MalwarebytesMalware.AI.2251104497
PandaTrj/CI.A
TrendMicro-HouseCallTROJ_GEN.R005C0DF121
RisingMalware.Heuristic!ET#96% (RDMK:cmRtazo3DmDhpSMfgfIYdV6sArpo)
IkarusVirus.Win32.Vundo
MaxSecureTrojan.Malware.300983.susgen
FortinetW32/PossibleThreat
AVGWin32:Trojan-gen

How to remove Backdoor:Win32/Zegost.CH 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 Backdoor:Win32/Zegost.CH 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/Zegost.CH 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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