Trojan:Win32/Ramnit!A

Written by Robert Bailey

What is Trojan:Win32/Ramnit!A infection?

In this post you will certainly discover about the meaning of Trojan:Win32/Ramnit!A and also its unfavorable effect on your computer system. Such ransomware are a type of malware that is elaborated by online frauds to require paying the ransom money by a sufferer.

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Most of the situations, Trojan:Win32/Ramnit!A ransomware will certainly advise its sufferers to start funds move for the function of neutralizing the amendments that the Trojan infection has presented to the victim’s device.

Trojan:Win32/Ramnit!A Summary

These alterations 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.
  • A process attempted to delay the analysis task.;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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
  • 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.
  • Operates on local firewall’s policies and 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;
  • Attempts to modify or disable Security Center warnings;
  • Ciphering the documents situated on the victim’s disk drive — so the sufferer can no more make use of the information;
  • Preventing regular access 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.

Trojan:Win32/Ramnit!A

The most normal networks where Trojan:Win32/Ramnit!A Ransomware Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of customer winding up on a source that hosts a harmful software application;

As soon as the Trojan is efficiently infused, it will either cipher the information on the sufferer’s computer or avoid the tool from working in an appropriate manner – while also positioning a ransom note that discusses the requirement for the sufferers to impact the repayment for the function of decrypting the records or bring back the data system back to the initial problem. In a lot of circumstances, the ransom money note will show up when the customer restarts the COMPUTER after the system has actually currently been damaged.

Trojan:Win32/Ramnit!A circulation networks.

In various edges of the globe, Trojan:Win32/Ramnit!A grows by leaps and also bounds. However, the ransom notes as well as tricks of extorting the ransom money quantity may differ relying on specific neighborhood (local) setups. The ransom notes as well as methods of extorting the ransom amount may differ depending on specific local (regional) settings.

Ransomware injection

As an example:

    Faulty alerts concerning unlicensed software.

    In certain locations, the Trojans frequently wrongfully report having discovered some unlicensed applications made it possible for on the target’s tool. The alert then requires the user to pay the ransom.

    Faulty statements regarding illegal web content.

    In nations where software application piracy is less preferred, this technique is not as efficient for the cyber scams. Alternatively, the Trojan:Win32/Ramnit!A popup alert might falsely assert to be originating from a police institution and also will certainly report having situated child porn or other illegal information on the tool.

    Trojan:Win32/Ramnit!A popup alert might wrongly claim to be acquiring from a regulation enforcement establishment as well as will report having situated child porn or various other unlawful information on the device. The alert will similarly consist of a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: 23974EE0
md5: 1590c0ddd398a7cf969766d2a0902d9b
name: 1590C0DDD398A7CF969766D2A0902D9B.mlw
sha1: 5a84899d13fdb6b5fea7850d054f96403dc86636
sha256: 2999b0b16993557716c68c7f2cf2d50268e41c2214470648f930c8d0322d52a6
sha512: ab9b1f5159d498c0beca01745876ddfe8b38c307562d3e445500a78f7c04e719e5aef0ffd6fbd802aa25fb24655d941018b990af8966349aeb08d478d5b26c3a
ssdeep: 3072:ja9Fn7MtVbG7Y9wVR4xut28EpPFHQe50TIXRYk7BoR5oibGGI34yY+lO+EUePXcl:jGFmeY9wVR4Qt28x4eS3ZYxXqxV
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: (c) 2015 Trimble Navigation Limited
InternalName: StyleBuilder
FileVersion: 16.0.19.91
CompanyName: Trimble Navigation Limited
ProductName: Style Builder
ProductVersion: 16.0.19.91
FileDescription: Style Builder
OriginalFilename: Style Builder.EXE
Translation: 0x0409 0x04b0

Trojan:Win32/Ramnit!A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004f81cb1 )
Elastic malicious (high confidence)
DrWeb Win32.HLLM.Reset.493
Cynet Malicious (score: 100)
ALYac Gen:Variant.Graftor.303151
Cylance Unsafe
Zillya Trojan.Blocker.Win32.36223
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Blocker.6a9ae5e8
K7GW Trojan ( 004f81cb1 )
Cybereason malicious.dd398a
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Ramnit.BV
APEX Malicious
Avast Win32:Dropper-gen [Drp]
Kaspersky Trojan-Ransom.Win32.Blocker.jngj
BitDefender Gen:Variant.Graftor.303151
NANO-Antivirus Trojan.Win32.Blocker.ehgzty
MicroWorld-eScan Gen:Variant.Graftor.303151
Tencent Win32.Virus.Ramnit.Dygm
Ad-Aware Gen:Variant.Graftor.303151
Sophos ML/PE-A
BitDefenderTheta Gen:NN.ZexaF.34608.vq0@aSKeo8ai
VIPRE Trojan.Win32.Generic.pak!cobra
TrendMicro Mal_MiliCry-1c
McAfee-GW-Edition BehavesLike.Win32.Generic.fc
FireEye Generic.mg.1590c0ddd398a7cf
Emsisoft Gen:Variant.Graftor.303151 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1132666
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Ramnit.gen!A
Arcabit Trojan.Graftor.D4A02F
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.Graftor.303151
Acronis suspicious
McAfee Artemis!1590C0DDD398
MAX malware (ai score=80)
VBA32 BScope.TrojanRansom.Blocker
Malwarebytes MachineLearning/Anomalous.100%
Panda Trj/GdSda.A
TrendMicro-HouseCall Mal_MiliCry-1c
Rising Virus.Ramnit!8.4 (CLOUD)
Ikarus Virus.Win32.Ramnit
AVG Win32:Dropper-gen [Drp]
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASOQA

How to remove Trojan:Win32/Ramnit!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 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 Trojan:Win32/Ramnit!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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:Win32/Ramnit!A 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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