Trojan:Win32/Comrerop

Written by Robert Bailey

What is Trojan:Win32/Comrerop infection?

In this short article you will certainly find concerning the definition of Trojan:Win32/Comrerop and its adverse effect on your computer system. Such ransomware are a kind of malware that is specified by on-line scams to require paying the ransom money by a target.

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In the majority of the situations, Trojan:Win32/Comrerop ransomware will advise its targets to launch funds transfer for the objective of counteracting the amendments that the Trojan infection has presented to the target’s tool.

Trojan:Win32/Comrerop Summary

These adjustments can be as adheres to:

  • 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.
  • 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.

  • 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.
  • Uses Windows utilities for basic functionality;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Exhibits possible ransomware file modification behavior;
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents found on the target’s hard disk drive — so the victim can no more utilize the data;
  • Preventing regular access to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Trojan:Win32/Comrerop

One of the most normal channels where Trojan:Win32/Comrerop Trojans are infused are:

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

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the target’s PC or avoid the device from operating in a proper fashion – while additionally positioning a ransom note that mentions the requirement for the victims to impact the settlement for the objective of decrypting the documents or bring back the documents system back to the preliminary problem. In most circumstances, the ransom money note will certainly show up when the client restarts the COMPUTER after the system has already been damaged.

Trojan:Win32/Comrerop distribution channels.

In different corners of the globe, Trojan:Win32/Comrerop grows by jumps as well as bounds. Nonetheless, the ransom money notes and techniques of extorting the ransom amount might vary relying on particular local (regional) setups. The ransom notes and techniques of obtaining the ransom money quantity may differ depending on certain neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In specific locations, the Trojans frequently wrongfully report having actually spotted some unlicensed applications allowed on the target’s gadget. The sharp then requires the individual to pay the ransom money.

    Faulty declarations about illegal content.

    In countries where software program piracy is less popular, this approach is not as efficient for the cyber scams. Conversely, the Trojan:Win32/Comrerop popup alert might incorrectly assert to be originating from a police establishment as well as will report having situated youngster porn or other illegal data on the gadget.

    Trojan:Win32/Comrerop popup alert may incorrectly assert to be obtaining from a law enforcement organization and will report having situated child pornography or other unlawful information on the gadget. The alert will similarly contain a need for the individual to pay the ransom.

Technical details

File Info:

crc32: BEFB3328
md5: d7bfaa13ebfed91a4a93302c226cb4c8
name: D7BFAA13EBFED91A4A93302C226CB4C8.mlw
sha1: e84cc2745855db915a40ac9de87dc7704774dca3
sha256: fbbc42f76be24739efbff50003d3bb0b0d102bfebf2b4553cedbcf29afcadcbb
sha512: 0a43a6b5bc6de1041d0857423831b13af0d3db34367ff32654a80b840a8e601865c714db101b9e9ce7859250e0b2b6dab4979dc509347406f54380138aeb25f8
ssdeep: 768:vFU8/sd4Xq++OgbGdOLFwHcuj924JdnvoBQJYc+FNlJK4YGrAAzg8hA/aN4x:vTu++JsSA26dvoBQV+dJeGUAzg8a
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: JjX0kCfQV3jBl
Assembly Version: 8.3.9.6
InternalName: SimpleLK.exe
FileVersion: 7.2.5.8
CompanyName: NGYpA
Comments: aM3yjZ6aNuS9
ProductName: s
ProductVersion: 7.2.5.8
FileDescription: llK
OriginalFilename: SimpleLK.exe

Trojan:Win32/Comrerop also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 00568b631 )
Elastic malicious (high confidence)
DrWeb Trojan.AVKill.28128
Cynet Malicious (score: 99)
ALYac Gen:Variant.Razy.738178
Cylance Unsafe
Zillya Trojan.Blocker.Win32.3493
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Blocker.9827565e
K7GW Trojan ( 00568b631 )
Cybereason malicious.3ebfed
Symantec ML.Attribute.HighConfidence
ESET-NOD32 MSIL/TrojanDropper.Agent.QN
APEX Malicious
Avast MSIL:GenMalicious-ZC [Trj]
Kaspersky Trojan-Ransom.Win32.Blocker.aljd
BitDefender Gen:Variant.Razy.738178
NANO-Antivirus Trojan.Win32.Blocker.dhxoyx
MicroWorld-eScan Gen:Variant.Razy.738178
Tencent Win32.Trojan.Blocker.Wtdv
Ad-Aware Gen:Variant.Razy.738178
Sophos Mal/Generic-S
Comodo Malware@#3t1lpptqj02ps
BitDefenderTheta Gen:NN.ZemsilF.34678.cm3@aWPWMDb
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Generic.dx!D7BFAA13EBFE
FireEye Generic.mg.d7bfaa13ebfed91a
Emsisoft Gen:Variant.Razy.738178 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Blocker.oqj
Webroot W32.Gen.Bt
Avira TR/Dropper.Gen
eGambit Generic.Dropper
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Comrerop
Arcabit Trojan.Razy.DB4382
GData Gen:Variant.Razy.738178
McAfee Generic.dx!D7BFAA13EBFE
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Panda Trj/CI.A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.DR.Agent!otDNl9ZNqsU
Ikarus Trojan-Ransom.Blocker
MaxSecure Trojan.Malware.5152798.susgen
Fortinet MSIL/TrojanDropper.LY!tr
AVG MSIL:GenMalicious-ZC [Trj]
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASOcA

How to remove Trojan:Win32/Comrerop 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

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 Trojan:Win32/Comrerop 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:Win32/Comrerop 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/products/

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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