Ransom:Win32/Rokku.A

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

What is Ransom:Win32/Rokku.A infection?

In this article you will locate about the meaning of Ransom:Win32/Rokku.A and its adverse effect on your computer system. Such ransomware are a type of malware that is elaborated by on the internet frauds to require paying the ransom by a sufferer.

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In the majority of the instances, Ransom:Win32/Rokku.A ransomware will certainly advise its victims to start funds move for the objective of counteracting the changes that the Trojan infection has actually presented to the sufferer’s gadget.

Ransom:Win32/Rokku.A Summary

These alterations 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.
  • A process created a hidden window;
  • 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;
  • Attempts to delete volume shadow copies;
  • Crashed cuckoomon during analysis. Report this error to the Github repo.;
  • Writes a potential ransom message to disk;
  • Attempts to disable System Restore. System Restore function – allows you to revert the computer’s state (system files, applications, and system settings) to that of a previous point in time, which can be used to recover after a virus attack.
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files situated on the target’s hard disk — so the victim 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.

Ransom:Win32/Rokku.A

The most common networks through which Ransom:Win32/Rokku.A Ransomware are injected are:

  • By methods of phishing emails;
  • As a repercussion of customer ending up on a source that organizes a harmful software program;

As soon as the Trojan is efficiently injected, it will certainly either cipher the information on the target’s computer or stop the gadget from functioning in a correct way – while likewise positioning a ransom money note that mentions the need for the victims to impact the settlement for the objective of decrypting the papers or recovering the documents system back to the preliminary condition. In most circumstances, the ransom note will come up when the customer restarts the COMPUTER after the system has already been harmed.

Ransom:Win32/Rokku.A circulation networks.

In various corners of the globe, Ransom:Win32/Rokku.A expands by jumps and also bounds. Nonetheless, the ransom money notes as well as techniques of extorting the ransom quantity may differ depending upon particular local (regional) settings. The ransom money notes and methods of obtaining the ransom quantity may differ depending on particular neighborhood (local) settings.

Ransomware injection

As an example:

    Faulty signals about unlicensed software program.

    In certain locations, the Trojans typically wrongfully report having actually detected some unlicensed applications enabled on the victim’s gadget. The alert then demands the individual to pay the ransom money.

    Faulty declarations regarding prohibited web content.

    In countries where software application piracy is less popular, this technique is not as efficient for the cyber scams. Additionally, the Ransom:Win32/Rokku.A popup alert might falsely assert to be stemming from a law enforcement institution and also will report having situated youngster pornography or various other unlawful data on the tool.

    Ransom:Win32/Rokku.A popup alert might incorrectly assert to be acquiring from a regulation enforcement organization and also will certainly report having located youngster pornography or other prohibited information on the gadget. The alert will similarly include a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 0075EF78
md5: 5a0e3a6e3106e754381bd1cc3295c97f
name: 5A0E3A6E3106E754381BD1CC3295C97F.mlw
sha1: 49239500b0510ce7643c48ebfaf6c9e35aa1cce5
sha256: 1c40b5c96d13580f1dfa38f59f177502349aa1c962ff95559e0ec805155eb983
sha512: 0d3382962624e57d6ecdd6bd05e89055e7edb91e77be5e6d94ea8b86a647cc5beca2c7355e7c6ab73364677c74d9f2e8c485bdac680920919db8cbb61562244d
ssdeep: 24576:4X8MrUquMnj5Zw6UjNfpmR6Q9zz0DQuGvmq4e+57PRWUazgFGykkkbpu2kOkg7i:FejHzRj9v0DQuGvmq4bn7g7kkbwPOkf
type: PE32 executable (console) Intel 80386 (stripped to external PDB), for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/Rokku.A also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 0055dd191 )
DrWeb Trojan.Encoder.4270
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.Rokku.A7
ALYac Trojan.GenericKD.3115966
Cylance Unsafe
Zillya Trojan.Kryptik.Win32.869735
Sangfor Trojan.Win32.Kryptik.8
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Rokku.7ccd0e01
K7GW Trojan ( 0055dd191 )
Cybereason malicious.e3106e
Symantec Ransom.Rokku
ESET-NOD32 Win32/Filecoder.Rokku.A
APEX Malicious
Avast FileRepMalware
Kaspersky UDS:DangerousObject.Multi.Generic
BitDefender Trojan.GenericKD.3115966
NANO-Antivirus Trojan.Win32.Drop.ebbevo
ViRobot Trojan.Win32.Rokku.1559552
MicroWorld-eScan Trojan.GenericKD.3115966
Tencent Win32.Trojan.Raas.Auto
Ad-Aware Trojan.GenericKD.3115966
Sophos Troj/RokkuLck-A
Comodo Malware@#2q26y92vsimah
BitDefenderTheta Gen:NN.ZexaF.34692.FDW@aK9bjCb
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_ROKKU.B
McAfee-GW-Edition BehavesLike.Win32.Worm.th
FireEye Generic.mg.5a0e3a6e3106e754
Emsisoft Trojan.GenericKD.3115966 (B)
Jiangmin Trojan.Deshacop.ki
Webroot W32.Trojan.GenKD
Avira TR/Genasom.1559552
Antiy-AVL Trojan/Generic.ASMalwS.18EA658
Kingsoft Win32.Troj.Generic_a.a.(kcloud)
Microsoft Ransom:Win32/Rokku.A
Arcabit Trojan.Generic.D2F8BBE
AegisLab Trojan.Multi.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.GenericKD.3115966
AhnLab-V3 Trojan/Win32.Ransom.C1355594
McAfee Artemis!5A0E3A6E3106
MAX malware (ai score=100)
VBA32 Trojan.Deshacop
Malwarebytes Malware.AI.4038379892
Panda Trj/CI.A
TrendMicro-HouseCall Ransom_ROKKU.B
Rising Trojan.Kryptik!8.8 (TFE:5:oj6bobXIbuC)
Yandex Trojan.GenAsa!lsJZ8PDW10s
Ikarus Trojan-Ransom.Rokku
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Filecoder.RNSM!tr
AVG FileRepMalware
Paloalto generic.ml

How to remove Ransom:Win32/Rokku.A 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

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 Ransom:Win32/Rokku.A 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 Ransom:Win32/Rokku.A 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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