Trojan:Win32/Lethic.H

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

What is Trojan:Win32/Lethic.H infection?

In this short article you will discover about the meaning of Trojan:Win32/Lethic.H and its unfavorable effect on your computer. Such ransomware are a kind of malware that is clarified by on-line scams to require paying the ransom by a sufferer.

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In the majority of the situations, Trojan:Win32/Lethic.H virus will advise its sufferers to launch funds move for the purpose of reducing the effects of the amendments that the Trojan infection has actually introduced to the target’s gadget.

Trojan:Win32/Lethic.H Summary

These alterations can be as adheres to:

  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • 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.;
  • Expresses interest in specific running processes;
  • Executed a process and injected code into it, probably while unpacking;
  • Code injection with CreateRemoteThread in a remote process;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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.
  • Creates a copy of itself;
  • Empties the Recycle Bin, indicative of ransomware;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the sufferer’s disk drive — so the target can no more make use of the information;
  • Preventing normal accessibility to the victim’s workstation;

Trojan:Win32/Lethic.H

The most regular channels whereby Trojan:Win32/Lethic.H Ransomware Trojans are injected are:

  • By methods of phishing emails;
  • As an effect of individual winding up on a resource that hosts a harmful software application;

As soon as the Trojan is effectively injected, it will either cipher the data on the target’s PC or prevent the device from operating in a proper way – while also putting a ransom note that discusses the requirement for the targets to effect the repayment for the function of decrypting the records or restoring the documents system back to the initial condition. In a lot of circumstances, the ransom money note will come up when the client reboots the COMPUTER after the system has already been damaged.

Trojan:Win32/Lethic.H distribution channels.

In numerous corners of the globe, Trojan:Win32/Lethic.H grows by jumps as well as bounds. However, the ransom money notes and also techniques of obtaining the ransom quantity might vary depending on certain neighborhood (regional) setups. The ransom notes and tricks of extorting the ransom money amount may vary depending on specific neighborhood (local) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software application.

    In specific areas, the Trojans frequently wrongfully report having actually spotted some unlicensed applications allowed on the sufferer’s tool. The alert after that demands the customer to pay the ransom money.

    Faulty declarations about unlawful web content.

    In countries where software application piracy is less preferred, this method is not as effective for the cyber scams. Alternatively, the Trojan:Win32/Lethic.H popup alert may falsely claim to be deriving from a law enforcement organization and will certainly report having located youngster porn or various other illegal data on the device.

    Trojan:Win32/Lethic.H popup alert may falsely declare to be acquiring from a law enforcement institution as well as will report having situated child pornography or various other illegal data on the tool. The alert will similarly include a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: C75C5AB5
md5: f8c4af063987c53e233f6e1ce5e5ab91
name: F8C4AF063987C53E233F6E1CE5E5AB91.mlw
sha1: 7ec0a79e0ece2838cd4a93be63a29a3b44f8d1e7
sha256: 03c189ee39298cc5eae70eb2b68a72a2a766d39aee7da19b6377595cf3d001d3
sha512: df7bac8e9a2a5e75fd15014c9ef007fb48ce19af3b3cbd6ef63e424999c56a9844f38d36f1af8230714613c93e431074d5221072f6e48b0ea458bd20e13763da
ssdeep: 1536:SwMeO8RzKnDpqrhHzjtCf0jYtx3oHb5LDwrf0GsG5GowCIyKgb:5MJnDpqrw0jRHtIrBGoEyF
type: PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Lethic.H also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
Elasticmalicious (high confidence)
MicroWorld-eScanGen:Variant.Symmi.8604
FireEyeGeneric.mg.f8c4af063987c53e
Qihoo-360Generic/HEUR/QVM04.0.3674.Malware.Gen
ALYacGen:Variant.Symmi.8604
CylanceUnsafe
VIPRETrojan.Win32.Encpk.ahq (v)
SangforTrojan.Win32.Save.a
BitDefenderGen:Variant.Symmi.8604
CrowdStrikewin/malicious_confidence_80% (D)
BitDefenderThetaGen:NN.ZexaF.34608.fGW@aW8j6kpi
CyrenW32/A-ebd864e3!Eldorado
SymantecTrojan.Ransomlock!g32
ESET-NOD32Win32/Lethic.AA
APEXMalicious
AvastWin32:Cryptor
ClamAVWin.Trojan.Ransomlock-26
KasperskyHEUR:Trojan.Win32.Generic
AlibabaVirTool:Win32/Obfuscator.f1fe7277
NANO-AntivirusVirus.Win32.Gen-Crypt.ccnc
ViRobotBackdoor.Win32.A.Azbreg.92160
AegisLabTrojan.Win32.Generic.lEkh
RisingTrojan.Generic@ML.95 (RDMK:CJki0kIVBqN9Xts5zGbvJw)
Ad-AwareGen:Variant.Symmi.8604
EmsisoftGen:Variant.Symmi.8604 (B)
ComodoTrojWare.Win32.PWS.ZBot.AAA@4sq88d
DrWebWin32.HLLW.Autoruner.17766
ZillyaTrojan.Lethic.Win32.351
TrendMicroTROJ_RANSOM.SMJP
McAfee-GW-EditionBehavesLike.Win32.Sality.nm
SophosML/PE-A + Mal/EncPk-AHQ
IkarusTrojan.Win32.Tobfy
AviraTR/Patched.Gen
MAXmalware (ai score=84)
KingsoftWin32.Troj.Undef.(kcloud)
MicrosoftTrojan:Win32/Lethic.H
SUPERAntiSpywareTrojan.Agent/Gen-Ransom
AhnLab-V3Trojan/Win32.Ransomlock.R43489
ZoneAlarmHEUR:Trojan.Win32.Generic
GDataGen:Variant.Symmi.8604
CynetMalicious (score: 85)
TotalDefenseWin32/Lethic.MD
McAfeeRansom-ABD.gen.c
VBA32Worm.Dorkbot.1312
MalwarebytesMalware.Heuristic.1001
PandaTrj/Genetic.gen
TrendMicro-HouseCallTROJ_RANSOM.SMJP
TencentMalware.Win32.Gencirc.116ead0e
YandexTrojan.GenAsa!o2MoDmdOGqw
SentinelOneStatic AI – Malicious PE
FortinetW32/Ransom.AAX!tr
AVGWin32:Cryptor
Cybereasonmalicious.63987c
Paloaltogeneric.ml

How to remove Trojan:Win32/Lethic.H 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 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 Trojan:Win32/Lethic.H 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/Lethic.H 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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