Worm:Win32/Gamarue!rfn

What is Worm:Win32/Gamarue!rfn infection?

In this article you will locate regarding the meaning of Worm:Win32/Gamarue!rfn as well as its negative influence on your computer. Such ransomware are a kind of malware that is clarified by on the internet scams to demand paying the ransom by a sufferer.

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In the majority of the cases, Worm:Win32/Gamarue!rfn virus will certainly instruct its sufferers to start funds move for the purpose of counteracting the amendments that the Trojan infection has actually introduced to the victim’s device.

Worm:Win32/Gamarue!rfn Summary

These modifications can be as complies with:

  • 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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 attempted to delay the analysis task.;
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to stop active services;
  • 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
  • Attempts to modify browser security settings;
  • Creates a copy of itself;
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to disable Windows Defender;
  • 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.
  • Attempts to modify user notification settings;
  • Ciphering the files found on the sufferer’s hard disk drive — so the target can no more utilize the data;
  • Preventing normal 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.

Worm:Win32/Gamarue!rfn

The most normal channels whereby Worm:Win32/Gamarue!rfn Ransomware Trojans are infused are:

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

As soon as the Trojan is effectively injected, it will certainly either cipher the information on the target’s computer or stop the device from operating in a proper fashion – while also putting a ransom note that mentions the demand for the targets to impact the payment for the function of decrypting the documents or bring back the documents system back to the first condition. In many circumstances, the ransom money note will certainly show up when the customer reboots the COMPUTER after the system has currently been harmed.

Worm:Win32/Gamarue!rfn distribution networks.

In numerous corners of the world, Worm:Win32/Gamarue!rfn expands by leaps as well as bounds. Nonetheless, the ransom notes and methods of extorting the ransom quantity may differ depending upon particular regional (regional) setups. The ransom notes and methods of obtaining the ransom money quantity may vary depending on specific local (local) settings.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software application.

    In specific locations, the Trojans frequently wrongfully report having actually identified some unlicensed applications enabled on the victim’s tool. The alert after that requires the user to pay the ransom money.

    Faulty statements concerning unlawful content.

    In nations where software piracy is less prominent, this technique is not as efficient for the cyber fraudulences. Additionally, the Worm:Win32/Gamarue!rfn popup alert might incorrectly claim to be deriving from a law enforcement institution as well as will certainly report having situated youngster pornography or various other illegal information on the tool.

    Worm:Win32/Gamarue!rfn popup alert might incorrectly declare to be acquiring from a law enforcement establishment and also will report having located child porn or various other unlawful information on the gadget. The alert will likewise include a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: E34C8095
md5: 2e2e5e283c5353f652d3885ae6e2a420
name: 2E2E5E283C5353F652D3885AE6E2A420.mlw
sha1: 07f9bf153ae159f2b0cbacc8465472a02626917d
sha256: 0bb97289b200f15f67cc3e84d72e671a664e3f8261f87e72ca2de6ee2e412432
sha512: e725c0aaa887b78a8bad8e017fe8050b2aeedaf9510876e137fecf48bd9ee251929c5c97c0ccb411758b5234f3b194654435c5fa25f819476725352759dfe4fa
ssdeep: 3072:gQfkF0y2Uo4qxptTpV6zNzYRBxpv5GHqlkJV+g5COEzauptO1hsSOB5:3fkF6UoPT38ilsqUSzaHsSi5
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 AVG Netherlands B. V. 2011
FileVersion: 14.0.1000.340
CompanyName: TuneUp Software
LegalTrademarks: TuneUp Utilitiesx2122
ProductName: TuneUp Utilities 2014
ProductVersion: 14.0.1000.340
FileDescription: TuneUp Automatic Program Reactivator
Translation: 0x0000 0x04b0

Worm:Win32/Gamarue!rfn also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 005224381 )
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ser.Razy.8696
Cylance Unsafe
Zillya Trojan.Blocker.Win32.38400
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 005105d81 )
Cybereason malicious.83c535
Cyren W32/Cerber.CF.gen!Eldorado
Symantec Packed.Generic.459
ESET-NOD32 a variant of Win32/Kryptik.FTPE
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.Razy-7665605-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Ser.Razy.8696
NANO-Antivirus Trojan.Win32.Blocker.eqlkpv
MicroWorld-eScan Gen:Variant.Ser.Razy.8696
Tencent Malware.Win32.Gencirc.10bb5ab9
Ad-Aware Gen:Variant.Ser.Razy.8696
Sophos ML/PE-A + Mal/Cerber-AL
Comodo TrojWare.Win32.Zonidel.FTPE@7579f6
F-Secure Heuristic.HEUR/AGEN.1128849
BitDefenderTheta Gen:NN.ZexaF.34670.yq0@au5hFoei
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPCERBER.SMALY5A
McAfee-GW-Edition Ransomware-GBN!2E2E5E283C53
FireEye Generic.mg.2e2e5e283c5353f6
Emsisoft Gen:Variant.Ser.Razy.8696 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Generic.bmkob
Avira HEUR/AGEN.1128849
Antiy-AVL Trojan[Ransom]/Win32.Blocker
Microsoft Worm:Win32/Gamarue!rfn
Arcabit Trojan.Ser.Razy.D21F8
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Variant.Ser.Razy.8696
AhnLab-V3 Win-Trojan/Cerber.Gen
McAfee Ransomware-GBN!2E2E5E283C53
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Malwarebytes Trojan.Downloader
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPCERBER.SMALY5A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.GenAsa!zJ2zVVAx4GA
Ikarus Trojan-Ransom.Cerber
Fortinet W32/Injector.EETM!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Generic.HxQBPGUA

How to remove Worm:Win32/Gamarue!rfn 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 GridinSoft2

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft3.

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 Worm:Win32/Gamarue!rfn 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 Worm:Win32/Gamarue!rfn you can always ask me in the comments for getting help.

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References

  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. 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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