Trojan:Win32/MereTam.A

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

What is Trojan:Win32/MereTam.A infection?

In this article you will discover concerning the meaning of Trojan:Win32/MereTam.A and also its unfavorable effect on your computer. Such ransomware are a form of malware that is specified by on the internet frauds to require paying the ransom money by a sufferer.

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In the majority of the cases, Trojan:Win32/MereTam.A virus will advise its victims to launch funds transfer for the purpose of neutralizing the changes that the Trojan infection has actually introduced to the sufferer’s gadget.

Trojan:Win32/MereTam.A Summary

These modifications 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.

  • A process created a hidden window;
  • Unconventionial language used in binary resources: Russian;
  • A scripting utility was executed;
  • 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
  • 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 disable Windows Defender;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the sufferer’s disk drive — so the sufferer can no longer 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.

Trojan:Win32/MereTam.A

One of the most normal channels through which Trojan:Win32/MereTam.A Ransomware Trojans are infused are:

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

As soon as the Trojan is efficiently injected, it will certainly either cipher the data on the sufferer’s PC or stop the tool from working in a correct way – while additionally putting a ransom note that mentions the requirement for the sufferers to impact the repayment for the objective of decrypting the records or recovering the data system back to the first problem. In the majority of circumstances, the ransom note will come up when the customer restarts the PC after the system has actually currently been harmed.

Trojan:Win32/MereTam.A circulation channels.

In different corners of the globe, Trojan:Win32/MereTam.A expands by leaps and bounds. However, the ransom notes and tricks of obtaining the ransom quantity might differ relying on specific local (regional) setups. The ransom notes and also techniques of obtaining the ransom money amount might vary depending on particular neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software application.

    In particular areas, the Trojans commonly wrongfully report having actually discovered some unlicensed applications enabled on the sufferer’s tool. The alert then requires the individual to pay the ransom money.

    Faulty declarations concerning unlawful web content.

    In nations where software application piracy is much less prominent, this technique is not as reliable for the cyber fraudulences. Alternatively, the Trojan:Win32/MereTam.A popup alert might incorrectly assert to be stemming from a law enforcement institution and also will certainly report having located youngster porn or other unlawful information on the tool.

    Trojan:Win32/MereTam.A popup alert might falsely declare to be obtaining from a regulation enforcement organization and will certainly report having situated child pornography or other illegal information on the gadget. The alert will in a similar way have a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 5A5A61B3
md5: f0cac25d5cd862eedf07b282f74c0022
name: F0CAC25D5CD862EEDF07B282F74C0022.mlw
sha1: e0bbc2e98b17a2dfdffaa3739164f3aea164c604
sha256: bf58e500f4682403cbec223a11628f62e6deeaca75a1f09e8da8944a336daa95
sha512: cebef5fb8aba26cba2eca79b59c8d714a6613d65afb7baa368db672e3cfd5728a928110103a83c23617d7ca6b47a7c92f311631ef79852c369127a0dcadf831e
ssdeep: 49152:0Xz+CBGsFD3mFdvWNgMhufKYKTJ2ba19U:0Xz+CB50FUVUfKYAJya0
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Paralogue
FileDescription: Paralogue 0.34 Installation
FileVersion: 0.34
Comments:
CompanyName: Paralogue
Translation: 0x0409 0x04e4

Trojan:Win32/MereTam.A also known as:

GridinSoftTrojan.Ransom.Gen
K7AntiVirusTrojan ( 00560c521 )
DrWebTool.Nssm.6
MicroWorld-eScanTrojan.Miner.DL
CAT-QuickHealTrojan.Miner
ALYacTrojan.Miner.DL
CylanceUnsafe
SangforCoinMiner.Win32.Miner.gen
BitDefenderTrojan.Miner.DL
K7GWTrojan ( 00560c521 )
CyrenW32/Trojan.GYTF-5891
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win64/CoinMiner.PO potentially unwanted
APEXMalicious
TotalDefenseWin32/Jorik.KJ
CynetMalicious (score: 90)
KasperskyHEUR:Trojan.Win32.Miner.gen
AlibabaTrojan:Win64/Miners.c0d3cea0
NANO-AntivirusTrojan.Win64.Miner.inrqua
TencentWin32.Trojan.Miner.Ectu
Ad-AwareTrojan.Miner.DL
SophosMal/Generic-S
ComodoApplicUnwnt@#blaatiq3z803
VIPRETrojan.Win32.Generic!BT
TrendMicroTROJ_GEN.R002C0WCD21
FireEyeTrojan.Miner.DL
EmsisoftTrojan.Miner.DL (B)
WebrootW32.Trojan.Gen
AviraHEUR/AGEN.1136970
KingsoftWin32.Troj.Undef.(kcloud)
MicrosoftTrojan:Win32/MereTam.A
ArcabitTrojan.Miner.DL
AegisLabTrojan.Win32.Miner.4!c
ZoneAlarmHEUR:Trojan.Win32.Miner.gen
GDataTrojan.Miner.DL
McAfeeArtemis!F0CAC25D5CD8
MAXmalware (ai score=81)
MalwarebytesMalware.AI.1121623471
TrendMicro-HouseCallTROJ_GEN.R002C0WCD21
YandexTrojan.Miner!CYv4/S7jdYY
MaxSecureTrojan-Ransom.Win32.Crypmod.zfq
FortinetRiskware/Miner
PandaTrj/CI.A
Qihoo-360Win32/Miner.Coinminer.HgIASP4A

How to remove Trojan:Win32/MereTam.A ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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/MereTam.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 Trojan:Win32/MereTam.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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