Backdoor:Win32/Zegost

What is Backdoor:Win32/Zegost infection?

In this article you will certainly discover regarding the definition of Backdoor:Win32/Zegost as well as its unfavorable influence on your computer. Such ransomware are a type of malware that is elaborated by on the internet scams to require paying the ransom by a sufferer.

In the majority of the situations, Backdoor:Win32/Zegost infection will instruct its victims to start funds transfer for the purpose of reducing the effects of the modifications that the Trojan infection has actually presented to the target’s device.

Backdoor:Win32/Zegost Summary

These modifications can be as complies with:

  • At least one process apparently crashed during execution;
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • 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.
  • Unconventionial binary language: Chinese (Simplified);
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • Attempts to stop active services;
  • Crashed cuckoomon during analysis. Report this error to the Github repo.;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Checks the system manufacturer, likely for anti-virtualization;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers found on the sufferer’s disk drive — so the sufferer can no longer utilize the information;
  • Preventing routine access to the sufferer’s workstation;
Similar behavior
Related domains
z.whorecord.xyz Trojan/W32.Vundo.200704.B
a.tomx.xyz Trojan/W32.Vundo.200704.B

Backdoor:Win32/Zegost

One of the most normal networks where Backdoor:Win32/Zegost are infused are:

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

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the target’s PC or prevent the tool from working in an appropriate manner – while additionally placing a ransom note that mentions the demand for the sufferers to effect the payment for the function of decrypting the files or bring back the file system back to the first problem. In the majority of instances, the ransom money note will turn up when the customer reboots the PC after the system has already been damaged.

Backdoor:Win32/Zegost circulation networks.

In various edges of the globe, Backdoor:Win32/Zegost grows by leaps and bounds. Nevertheless, the ransom notes and methods of obtaining the ransom quantity may vary depending upon certain regional (regional) setups. The ransom notes and also methods of obtaining the ransom money quantity may vary depending on specific local (local) settings.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software.

    In particular areas, the Trojans commonly wrongfully report having actually detected some unlicensed applications allowed on the sufferer’s device. The alert after that requires the user to pay the ransom money.

    Faulty statements about illegal material.

    In countries where software piracy is much less prominent, this method is not as reliable for the cyber frauds. Alternatively, the Backdoor:Win32/Zegost popup alert might incorrectly declare to be deriving from a law enforcement institution and also will report having located child pornography or other unlawful data on the device.

    Backdoor:Win32/Zegost popup alert might incorrectly claim to be acquiring from a law enforcement institution and will report having situated kid pornography or other illegal information on the gadget. The alert will likewise contain a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 46B181CEmd5: 538a475b0b99792bff68661992d0a263name: sd.exesha1: 8e53d10777c66bbeab432f98d00c32924d63f546sha256: e54b943cfc07ec7118b8f910c9abbc238c21fbf8f72d2de8c7f57c5e4885e039sha512: 30c337e852ab24e90c98dcaeded6a32382fa8574b5db5b8a082b0166a3595caf11d747ed5e5606d4233632fdce12a92017671f36bfb67e86d138a90c08172406ssdeep: 6144:6sIt6nW8QPBTyPRqyhYPbHcTBlhHrBndnkv0:39W85Jq8YPbHcT3ktype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: (C) Microsoft Corporation. All rights reserved.InternalName: SPUNINST.EXEFileVersion: 6.3.0004.1 built by: dnsrvCompanyName: Microsoft CorporationProductName: Microsoft(R) Windows(R) Operating SystemProductVersion: 6.3.0004.1FileDescription: Windows Service Pack Uninstall OriginalFilename: SPUNINST.EXETranslation: 0x0804 0x04b0

Backdoor:Win32/Zegost also known as:

Bkav W32.ZegostQKB.Trojan
DrWeb BackDoor.Zegost.48
MicroWorld-eScan Trojan.Generic.4863548
FireEye Generic.mg.538a475b0b99792b
CAT-QuickHeal TrojanDropper.Zegost.C5
Qihoo-360 Dropper.Win32.Zegost.A
McAfee BackDoor-CEP.gen.cn
Cylance Unsafe
VIPRE Trojan.Win32.Generic.pak!cobra
AegisLab Trojan.Win32.Bjlog.lmoo
Sangfor Malware
K7AntiVirus Trojan ( 004b9fb21 )
BitDefender Trojan.Generic.4863548
K7GW Trojan ( 004b9fb21 )
Cybereason malicious.b0b997
TrendMicro TROJ_REDOS.SME
BitDefenderTheta AI:Packer.B5D8E9831F
F-Prot W32/Zegost.C.gen!Eldorado
Symantec Trojan Horse
TotalDefense Win32/Zegost.CJ
APEX Malicious
Avast Win32:Zegost-C [Trj]
ClamAV Win.Spyware.78740-1
Kaspersky Trojan-PSW.Win32.Bjlog.dtwr
Alibaba TrojanPSW:Win32/Bjlog.4a699022
NANO-Antivirus Trojan.Win32.Bjlog.drshei
ViRobot Trojan.Win32.PSWBjlog.200704
Rising Trojan.DL.Win32.GameOlx.xm (CLOUD)
Ad-Aware Trojan.Generic.4863548
TACHYON Trojan/W32.Vundo.200704.B
Emsisoft Trojan.Generic.4863548 (B)
Comodo Backdoor.Win32.Zegost.B@1qlsm2
F-Secure Backdoor:W32/Bjlog.D
Baidu Win32.Backdoor.Zegost.b
Zillya Trojan.Bjlog.Win32.12017
Invincea heuristic
McAfee-GW-Edition BehavesLike.Win32.Jeefo.ch
Trapmine malicious.high.ml.score
Sophos Mal/PWS-GA
Ikarus Trojan.Win32.Senta
Cyren W32/Zegost.L.gen!Eldorado
Jiangmin Trojan/PSW.Bjlog.clm
Webroot W32.Trojan.Gen
Avira TR/PSW.Bjlog.lfzb
Antiy-AVL Trojan[PSW]/Win32.Bjlog.dtwr
Microsoft Backdoor:Win32/Zegost
Endgame malicious (high confidence)
Arcabit Trojan.Generic.D4A363C
SUPERAntiSpyware Trojan.Agent/Gen-BiBear
ZoneAlarm Trojan-PSW.Win32.Bjlog.dtwr
GData Trojan.Generic.4863548
Cynet Malicious (score: 100)
AhnLab-V3 Dropper/Zegost.206136
Acronis suspicious
VBA32 TrojanPSW.Bjlog
ALYac Trojan.Generic.4863548
MAX malware (ai score=81)
Malwarebytes Trojan.Dropper
Panda Generic Malware
ESET-NOD32 Win32/Redosdru.GL
TrendMicro-HouseCall TROJ_REDOS.SME
Tencent Backdoor.Win32.Zegost.aaa
Yandex Trojan.Zegost.Gen.5
SentinelOne DFI – Malicious PE
eGambit Unsafe.AI_Score_99%
Fortinet W32/Bjlog.GL!tr
AVG Win32:Zegost-C [Trj]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (W)
MaxSecure Trojan.Malware.4790996.susgen

How to remove Backdoor:Win32/Zegost 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

Run the setup file.

Run Setup.exe
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 Scanning

Click on “Clean Now”.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

Full version of GridinSoft

If the guide doesn’t help you to remove Backdoor:Win32/Zegost you can always ask me in the comments for getting help.

References

    About the author

    Robert Bailey

    Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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