Trojan:Win32/Lethic.I

Written by Robert Bailey

What is Trojan:Win32/Lethic.I infection?

In this post you will certainly find concerning the definition of Trojan:Win32/Lethic.I and also its negative impact on your computer system. Such ransomware are a kind of malware that is specified by on the internet frauds to require paying the ransom money by a target.

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In the majority of the situations, Trojan:Win32/Lethic.I virus will certainly advise its sufferers to launch funds transfer for the purpose of counteracting the amendments that the Trojan infection has presented to the victim’s tool.

Trojan:Win32/Lethic.I Summary

These modifications can be as complies with:

  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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 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.
  • Expresses interest in specific running processes;
  • A process created a hidden window;
  • Code injection with CreateRemoteThread in a remote process;
  • Executed a process and injected code into it, probably while unpacking;
  • A process attempted to delay the analysis task by a long amount of time.;
  • 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
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents located on the target’s hard drive — so the sufferer can no longer use the data;
  • Preventing regular access to the victim’s workstation;

Trojan:Win32/Lethic.I

One of the most typical channels whereby Trojan:Win32/Lethic.I are infused are:

  • By ways of phishing emails;
  • As an effect of customer ending up on a resource that holds a destructive software;

As soon as the Trojan is effectively infused, it will either cipher the data on the sufferer’s PC or prevent the device from functioning in a correct manner – while also putting a ransom money note that states the requirement for the sufferers to effect the settlement for the purpose of decrypting the papers or bring back the file system back to the first problem. In a lot of circumstances, the ransom money note will certainly show up when the client restarts the COMPUTER after the system has currently been harmed.

Trojan:Win32/Lethic.I distribution networks.

In numerous corners of the world, Trojan:Win32/Lethic.I grows by leaps as well as bounds. Nevertheless, the ransom money notes and techniques of extorting the ransom quantity may vary relying on certain regional (local) settings. The ransom notes and tricks of extorting the ransom amount might differ depending on particular regional (regional) setups.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software application.

    In specific areas, the Trojans frequently wrongfully report having actually discovered some unlicensed applications allowed on the sufferer’s gadget. The sharp after that requires the customer to pay the ransom money.

    Faulty statements regarding illegal content.

    In nations where software piracy is much less preferred, this approach is not as reliable for the cyber fraudulences. Conversely, the Trojan:Win32/Lethic.I popup alert may falsely claim to be deriving from a law enforcement establishment and will certainly report having situated youngster porn or other illegal information on the device.

    Trojan:Win32/Lethic.I popup alert may wrongly claim to be acquiring from a regulation enforcement establishment as well as will certainly report having situated youngster porn or various other prohibited information on the gadget. The alert will in a similar way have a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 27EA46FB
md5: 88e49ec70d94d3574147ab1b71c3ff09
name: 88E49EC70D94D3574147AB1B71C3FF09.mlw
sha1: 3399b386fefab652f026bd1f78246e3c296f9154
sha256: f8a08844d93fb4a0bd8a17cc6c99f211c6ca1e5c254a14f6863e78545cc4998c
sha512: 0697c557955a63b7950a6d582531b4dcfbf9eacc8269554892db85424e79d5c1b66ffae0df585d72efeda0a82b94f6e0861c10013a0b5c743b2efeadc425aa32
ssdeep: 12288:IHinV4vjDIzdyZjveTDLgo3OY7mF2aYd68nGv5ybkIUdmZQHdzMUh9dYBb:IHiAjDIJAaAo3OY7yYdNnGxAU1MUrub
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Lethic.I also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ransom.Locky.154
FireEye Generic.mg.88e49ec70d94d357
CAT-QuickHeal Backdoor.Androm.A5
McAfee Trojan-FLTZ!88E49EC70D94
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Inject.4!c
Sangfor Malware
K7AntiVirus Trojan ( 0050b8a21 )
BitDefender Gen:Variant.Ransom.Locky.154
K7GW Trojan ( 0050b8a21 )
Cybereason malicious.70d94d
Cyren W32/S-aa44d37d!Eldorado
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:GenMalicious-NUT [Trj]
ClamAV Win.Trojan.Lethic-9828249-0
Kaspersky Trojan.Win32.Scarsi.auoa
NANO-Antivirus Trojan.Win32.Inject.enrczt
Tencent Malware.Win32.Gencirc.10b4427f
Ad-Aware Gen:Variant.Ransom.Locky.154
Emsisoft Gen:Variant.Ransom.Locky.154 (B)
Comodo TrojWare.Win32.Lethic.FQZT@6wxmtd
F-Secure Heuristic.HEUR/AGEN.1103331
DrWeb Trojan.Inject2.30717
Zillya Trojan.Inject.Win32.236220
TrendMicro TROJ_INJECT_GD21001B.UVPM
McAfee-GW-Edition BehavesLike.Win32.Adopshel.bh
Sophos ML/PE-A + Mal/Lethic-J
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Inject.xzh
Avira HEUR/AGEN.1103331
MAX malware (ai score=80)
Antiy-AVL Trojan/Win32.Inject
Microsoft Trojan:Win32/Lethic.I
Arcabit Trojan.Ransom.Locky.154
ZoneAlarm Trojan.Win32.Scarsi.auoa
GData Gen:Variant.Ransom.Locky.154
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Androm.R198246
Acronis suspicious
BitDefenderTheta AI:Packer.092E6BFD1F
ALYac Gen:Variant.Ransom.Locky.154
VBA32 BScope.Trojan.Scarsi
Malwarebytes Malware.AI.4186762385
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.FQZT
TrendMicro-HouseCall TROJ_INJECT_GD21001B.UVPM
Rising Trojan.Kryptik!1.AA6E (RDMK:cmRtazrc4774jhHBwKYxHPK1XwJW)
Yandex Trojan.GenAsa!t0WVk1AbCNI
Ikarus Trojan.Win32.Tofsee
eGambit Unsafe.AI_Score_99%
Fortinet W32/Kryptik.FQZT!tr
AVG Win32:GenMalicious-NUT [Trj]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Generic/HEUR/QVM10.1.B67E.Malware.Gen

How to remove Trojan:Win32/Lethic.I 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.

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Press “Install” button.

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Once installed, Anti-Malware will automatically run.

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Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Trojan:Win32/Lethic.I 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/Lethic.I 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/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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