Written by Robert Bailey

What is Trojan.Win32.Chapak.eyfj infection?

In this post you will discover concerning the interpretation of Trojan.Win32.Chapak.eyfj and also its negative influence on your computer. Such ransomware are a form of malware that is clarified by on-line scams to require paying the ransom by a victim.

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In the majority of the situations, Trojan.Win32.Chapak.eyfj virus will instruct its sufferers to start funds move for the purpose of reducing the effects of the changes that the Trojan infection has actually presented to the sufferer’s device.

Trojan.Win32.Chapak.eyfj 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.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Ukrainian;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • Steals private information from local Internet browsers;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Harvests credentials from local FTP client softwares;
  • Harvests information related to installed instant messenger clients;
  • Harvests information related to installed mail clients;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the target’s hard disk drive — so the target can no longer utilize the data;
  • Preventing routine accessibility to the victim’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 BehavesLike.Win32.RansomGandCrab.hc BehavesLike.Win32.RansomGandCrab.hc BehavesLike.Win32.RansomGandCrab.hc
r1— BehavesLike.Win32.RansomGandCrab.hc BehavesLike.Win32.RansomGandCrab.hc
r1— BehavesLike.Win32.RansomGandCrab.hc


One of the most typical networks whereby Trojan.Win32.Chapak.eyfj are infused are:

  • By means of phishing emails;
  • As a consequence of user winding up on a source that hosts a destructive software application;

As soon as the Trojan is efficiently infused, it will either cipher the data on the victim’s computer or prevent the device from working in an appropriate way – while also putting a ransom note that states the need for the sufferers to impact the settlement for the objective of decrypting the documents or recovering the file system back to the preliminary condition. In a lot of circumstances, the ransom money note will certainly turn up when the client restarts the PC after the system has actually already been harmed.

Trojan.Win32.Chapak.eyfj circulation channels.

In various edges of the world, Trojan.Win32.Chapak.eyfj expands by leaps and bounds. Nonetheless, the ransom notes as well as methods of extorting the ransom money quantity may differ relying on certain neighborhood (regional) settings. The ransom notes and also techniques of obtaining the ransom quantity may differ depending on particular local (local) settings.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software application.

    In particular areas, the Trojans frequently wrongfully report having identified some unlicensed applications allowed on the victim’s gadget. The sharp after that demands the customer to pay the ransom money.

    Faulty declarations regarding illegal content.

    In countries where software program piracy is less popular, this technique is not as effective for the cyber scams. Alternatively, the Trojan.Win32.Chapak.eyfj popup alert might incorrectly claim to be deriving from a police organization and will report having located kid pornography or various other illegal data on the gadget.

    Trojan.Win32.Chapak.eyfj popup alert might falsely assert to be obtaining from a regulation enforcement organization and also will report having situated youngster pornography or other illegal information on the gadget. The alert will likewise have a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 101B86B9
md5: 14c352be7111714a07714ab82bfd1b70
name: 14C352BE7111714A07714AB82BFD1B70.mlw
sha1: 3db41efadf56deafeff3ac541ea68c0046843e47
sha256: 1b7bc78836c832c48b86f5c5406741018af99062461b8f4f2f9e55c8fcc076fc
sha512: 45e15889a6d44891755aaa7de5abced9ea1cd5fdb91d2e284430c65647e136ca5a3b246b7a9ff14fbaf0a2d857e625fa359faeaeefed72e62b04c246214ab4ec
ssdeep: 12288:vLu6SoojusTzFFlMB9gRzAZxBBJYXNwntYkxIKh2xvfBHDw3:vLHf+uOhFlMo16xeNwnakxph2pfBHDw3
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

InternalSurname: vebug.ekc
Prod: 1.2.4
LegalCo: Copyri (C) 2019, pirmudakionca

Trojan.Win32.Chapak.eyfj also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKD.36149438
CAT-QuickHeal Trojan.Zenpack
Qihoo-360 Generic/HEUR/QVM11.1.AEDC.Malware.Gen
McAfee RDN/ArkeiStealer
Cylance Unsafe
Zillya Trojan.Chapak.Win32.87765
AegisLab Trojan.Win32.Chapak.4!c
Sangfor Malware
K7AntiVirus Trojan ( 005765391 )
BitDefender Trojan.GenericKD.36149438
K7GW Trojan ( 005765391 )
Cybereason malicious.adf56d
Arcabit Trojan.Generic.D22798BE
Cyren W32/Trojan.OJIR-2517
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:TrojanX-gen [Trj]
Kaspersky Trojan.Win32.Chapak.eyfj
Alibaba Trojan:Win32/Chapak.e42d5c00
ViRobot Trojan.Win32.Z.Agent.557568.YV
Rising Trojan.Kryptik!1.D13F (CLASSIC)
Ad-Aware Trojan.GenericKD.36149438
Emsisoft Trojan.Crypt (A)
Comodo Malware@#1j3embga3vi2q
F-Secure Trojan.TR/AD.VidarStealer.cllsh
DrWeb Trojan.Siggen11.58788
VIPRE Trojan.Win32.Generic!BT
TrendMicro TROJ_FRS.0NA104AI21
McAfee-GW-Edition BehavesLike.Win32.RansomGandCrab.hc
Sophos Mal/Generic-S
Ikarus Trojan.MalPack
Jiangmin Trojan.Chapak.lsp
Webroot W32.Trojan.Gen
Avira TR/AD.VidarStealer.cllsh
Kingsoft Win32.Troj.Generic_a.a.(kcloud)
Gridinsoft Trojan.Win32.Packed.oa
Microsoft Trojan:Win32/LokibotCrypt.MT!MTB
ZoneAlarm Trojan.Win32.Chapak.eyfj
GData Trojan.GenericKD.36149438
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Agent.R363591
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34780.ImGfamjiSogc
ALYac Trojan.PSW.Vidar
VBA32 Trojan.Injuke
Malwarebytes Trojan.MalPack.GS
Panda Trj/GdSda.A
ESET-NOD32 a variant of Win32/Kryptik.HIVX
TrendMicro-HouseCall TROJ_FRS.0NA104AI21
Tencent Win32.Trojan.Chapak.Dzah
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_80%
Fortinet W32/Kryptik.GWXD!tr
AVG Win32:TrojanX-gen [Trj]
CrowdStrike win/malicious_confidence_100% (D)

How to remove Trojan.Win32.Chapak.eyfj ransomware?

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.

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 Trojan.Win32.Chapak.eyfj 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 Trojan.Win32.Chapak.eyfj 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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