Written by Robert Bailey

What is Backdoor:Win32/Zegost.Z infection?

In this post you will certainly find concerning the meaning of Backdoor:Win32/Zegost.Z and also its adverse effect on your computer. Such ransomware are a kind of malware that is elaborated by on-line scams to demand paying the ransom by a target.

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Most of the cases, Backdoor:Win32/Zegost.Z infection will certainly advise its targets to start funds move for the objective of neutralizing the amendments that the Trojan infection has introduced to the sufferer’s gadget.

Backdoor:Win32/Zegost.Z Summary

These modifications can be as follows:

  • Attempts to connect to a dead IP:Port (1 unique times);
  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • 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.
  • Uses Windows utilities for basic functionality;
  • Deletes its original binary from disk;
  • Sniffs keystrokes;
  • Ciphering the files located on the target’s disk drive — so the victim can no more utilize the data. This is the typical behavior of malware known as ransomware that encrypts a victim’s files. The cybercriminal then demands a ransom from the victim to restore access to the data upon payment.
  • 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.

Related domains: Virus.Win32.Vundo Virus.Win32.Vundo Virus.Win32.Vundo


The most common channels through which Backdoor:Win32/Zegost.Z Ransomware are infused are:

  • By means of phishing e-mails;
  • As a repercussion of customer winding up on a source that organizes a harmful software application;

As soon as the Trojan is effectively injected, it will certainly either cipher the information on the sufferer’s computer or avoid the device from operating in an appropriate fashion – while additionally placing a ransom money note that mentions the requirement for the sufferers to impact the repayment for the objective of decrypting the records or restoring the documents system back to the first problem. In a lot of instances, the ransom note will come up when the customer restarts the COMPUTER after the system has actually currently been harmed.

Backdoor:Win32/Zegost.Z circulation channels.

In different edges of the globe, Backdoor:Win32/Zegost.Z grows by jumps and also bounds. Nonetheless, the ransom notes, as well as tricks of extorting the ransom money quantity, might vary depending upon certain regional (local) setups. The ransom money notes and techniques of obtaining the ransom money quantity may vary depending on certain regional (regional) settings.

Ransomware injection

For instance:

    Faulty informs about unlicensed software application.

    In particular locations, the Trojans frequently wrongfully report having identified some unlicensed applications allowed on the target’s gadget. The alert then demands the individual to pay the ransom.

    Faulty declarations about illegal web content.

    In countries where software piracy is less prominent, this technique is not as effective for cyber frauds. Conversely, the Backdoor:Win32/Zegost.Z popup alert may incorrectly declare to be originating from a law enforcement organization as well as will certainly report having located child porn or various other prohibited information on the tool.

    Backdoor:Win32/Zegost.Z popup alert may wrongly assert to be obtaining from a regulation enforcement organization as well as will certainly report having located kid porn or various other unlawful information on the tool. The alert will likewise consist of a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: 81DF3686
md5: 8d13afecb1d4afa2de77fc77211b202c
name: 8D13AFECB1D4AFA2DE77FC77211B202C.mlw
sha1: 593c0bcc2d8f8f90946d8db491e4d0886c43031f
sha256: dd807ac5ab5263aea7465e1f340cee76e51faea67632244885e5b0f59d35258d
sha512: f0acb9701298fd55684b511328d5734d687fc4a365ee4614af6554311a5d8452fdea0ac703b2451d91181466f769baedd1f98cf4f5f09b3480cea0da224435df
ssdeep: 3072:9qzWvebdAKi8dZInyR2RcoUp0L9d46gHKu1kC:90WvWfig0pd46kb
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: AntiVir? is a registered trademark of Avira GmbH, Germany
InternalName: AntiVir/Win32
FileVersion: 0, 0, 0, 0
CompanyName: Avira GmbH
ProductName: AVVDF
ProductVersion: 1, 0, 0, 1001
FileDescription: AntiVir Engine Module for Windows
OriginalFilename: 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
Translation: 0x0804 0x04b0

Backdoor:Win32/Zegost.Z also known as:

Bkav W32.AIDetectVM.malware1
MicroWorld-eScan Backdoor.Generic.692498
McAfee Artemis!8D13AFECB1D4
Cylance Unsafe
VIPRE Trojan.Win32.Generic.pak!cobra
Sangfor Malware
BitDefender Backdoor.Generic.692498
K7GW Trojan ( 0055e3e41 )
K7AntiVirus Trojan ( 0055e3e41 )
Cyren W32/FakeAlert.LE.gen!Eldorado
Symantec ML.Attribute.HighConfidence
APEX Malicious
ClamAV Win.Trojan.Ag-1
Kaspersky Trojan-Dropper.Win32.Dinwod.zru
NANO-Antivirus Trojan.Win32.Dwn.sshzz
ViRobot Trojan.Win32.A.PSW-Magania.240956[UPX]
Ad-Aware Backdoor.Generic.692498
Sophos Mal/Generic-S + Troj/YonSole-A
Comodo Backdoor.Win32.PcClient.~d26@1oom5f
F-Secure Heuristic.HEUR/AGEN.1101600
DrWeb Trojan.DownLoader5.2494
Zillya Trojan.Magania.Win32.45137
TrendMicro TROJ_AGENT_004362.TOMB
McAfee-GW-Edition GenericRXCP-AS!095D4870564A
Emsisoft Backdoor.Generic.692498 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Generic.igxc
Avira HEUR/AGEN.1101600
Antiy-AVL Trojan[GameThief]/Win32.Magania
Microsoft Backdoor:Win32/Zegost.Z
ZoneAlarm Trojan-Dropper.Win32.Dinwod.zru
GData Backdoor.Generic.692498
Cynet Malicious (score: 85)
AhnLab-V3 Trojan/Win32.Magania.R13682
BitDefenderTheta Gen:NN.ZexaF.34804.hmMfayIixmnb
ALYac Backdoor.Generic.692498
MAX malware (ai score=87)
VBA32 BScope.TrojanDropper.Dinwod
Malwarebytes Malware.Heuristic.1003
Panda Generic Malware
ESET-NOD32 a variant of Win32/Farfli.FB
TrendMicro-HouseCall TROJ_AGENT_004362.TOMB
Rising Backdoor.Yonsole!8.31D (TFE:5:dtMkLjFsp0O)
Yandex Trojan.Farfli!xNlzo4wCgRY
Ikarus Virus.Win32.Vundo
Fortinet W32/Farfli.BVV!tr
AVG FileRepMalware
Cybereason malicious.cb1d4a
Avast FileRepMalware
Qihoo-360 Win32/Backdoor.Agent.AN

How to remove Backdoor:Win32/Zegost.Z 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.

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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.Z 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.Z you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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