Trojan.JS.Agent.LHH

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

What is Trojan.JS.Agent.LHH infection?

In this short article you will locate concerning the definition of Trojan.JS.Agent.LHH and also its adverse influence on your computer. Such ransomware are a kind of malware that is elaborated by online scams to demand paying the ransom by a victim.

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In the majority of the situations, Trojan.JS.Agent.LHH ransomware will advise its targets to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has introduced to the target’s gadget.

Trojan.JS.Agent.LHH Summary

These modifications 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.
  • Attempts to connect to a dead IP:Port (1 unique times);
  • 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;
  • Performs some HTTP requests;
  • Uses Windows utilities for basic functionality;
  • Checks for the presence of known windows from debuggers and forensic tools;
  • 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.
  • A wscript.exe process commonly used in script or document file downloaders initiated network activity;
  • Detects VirtualBox through the presence of a registry key;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Ciphering the files found on the sufferer’s disk drive — so the sufferer can no more use the data;
  • Preventing normal accessibility 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.
Similar behavior
Related domains
proektstroy.webservis.ruTrojan-Ransom.Script.Locky

Trojan.JS.Agent.LHH

The most regular networks whereby Trojan.JS.Agent.LHH Ransomware Trojans are injected are:

  • By ways of phishing e-mails;
  • As a repercussion of individual ending up on a resource that holds a harmful software program;

As soon as the Trojan is successfully injected, it will either cipher the information on the sufferer’s computer or prevent the device from functioning in a correct fashion – while additionally placing a ransom note that mentions the demand for the sufferers to effect the repayment for the purpose of decrypting the papers or restoring the data system back to the initial problem. In many instances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has currently been harmed.

Trojan.JS.Agent.LHH circulation networks.

In different corners of the globe, Trojan.JS.Agent.LHH expands by leaps and bounds. Nonetheless, the ransom notes as well as tricks of obtaining the ransom money quantity may differ depending on particular neighborhood (local) settings. The ransom money notes and techniques of extorting the ransom amount might differ depending on particular regional (local) setups.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software application.

    In certain locations, the Trojans commonly wrongfully report having actually detected some unlicensed applications allowed on the victim’s gadget. The sharp after that requires the customer to pay the ransom money.

    Faulty statements about prohibited material.

    In countries where software piracy is much less popular, this technique is not as efficient for the cyber fraudulences. Alternatively, the Trojan.JS.Agent.LHH popup alert may incorrectly assert to be deriving from a police institution as well as will certainly report having situated kid porn or other illegal information on the device.

    Trojan.JS.Agent.LHH popup alert might falsely declare to be acquiring from a legislation enforcement institution as well as will report having located kid porn or other unlawful information on the tool. The alert will in a similar way have a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 5B24D6E3
md5: 1a4b5cba68056f5bb42d86514911a316
name: proposal_4F7B73A5.zip
sha1: 24f21eba7506c471469e720a47082bd527d1c6dc
sha256: 98baf443f4f02b434e10bfbc4f473c00201c037725e13f3e09630ff961e24d51
sha512: 385deda0243d19af14fe8a9560ce80085148ad4f7d339cea92d25c895e031a5caa16f157df197ffbf465b7766a6062b6387d226b201f2b2633a7f449ce2e2b9c
ssdeep: 96:E6LFC2lsC7r0GU6LFC2lsC7r0GT6LFC2lsC7r0G96LFC2lsC7r0GJg:jC2eC/fC2eC/CC2eC/UC2eC/dg
type: Zip archive data, at least v2.0 to extract

Version Info:

0: [No Data]

Trojan.JS.Agent.LHH also known as:

GridinSoftTrojan.Ransom.Gen
MicroWorld-eScanTrojan.JS.Agent.LHH
nProtectTrojan.JS.Agent.LHH
McAfeeJS/Nemucod.in
BitDefenderTrojan.JS.Agent.LHH
K7GWTrojan ( 004dfe6d1 )
K7AntiVirusTrojan ( 004dfe6d1 )
BaiduMulti.Threats.InArchive
F-ProtJS/Locky.AA
ESET-NOD32JS/TrojanDownloader.Nemucod.AAL
TrendMicro-HouseCallTROJ_FR.FA8C1241
KasperskyTrojan-Downloader.JS.Agent.knf
NANO-AntivirusTrojan.Script.Locky.ecathk
RisingTrojan.DL-Locky!1.A4D0
Ad-AwareTrojan.JS.Agent.LHH
SophosTroj/JSAgent-HR
F-SecureTrojan-Downloader:JS/Maljas.A
DrWebJS.DownLoader.1471
TrendMicroTROJ_FR.FA8C1241
McAfee-GW-EditionJS/Nemucod.in
EmsisoftTrojan.JS.Agent.LHH (B)
CyrenJS/Locky.AA
AviraHEUR/Suspar.Gen
FortinetJS/Nemucod.AAL!tr
ArcabitTrojan.JS.Agent.LHH
AegisLabSuspar.Gen!c
MicrosoftTrojanDownloader:JS/Nemucod
ALYacTrojan.JS.Agent.LHH
TencentJs.Trojan.Raas.Auto
IkarusTrojan-Ransom.Script.Locky
GDataTrojan.JS.Agent.LHH
AVGJS/Downloader.Agent

How to remove Trojan.JS.Agent.LHH 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.JS.Agent.LHH 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.JS.Agent.LHH 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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