Trojan.Lotok.V

Trojan.Lotok.V is a Windows-based Trojan horse classified as highly dangerous, with a threat rating of 8 out of 10. Like most threats in this category, it is designed to infiltrate a computer quietly, avoid detection, and carry out malicious instructions in the background without the user's knowledge or consent. First observed in mid-December 2025 and still being detected through October 2026, Lotok.V remains an active threat that Windows users should take seriously.

What Trojan.Lotok.V Does

Once active on a system, Lotok.V runs silently in the background while performing a range of harmful functions. It is often disguised as a legitimate self-extracting installer package, which allows it to blend in with normal software installation activity and avoid raising suspicion. Behind this disguise, the Trojan can extract hidden components into temporary folders and launch additional executable files without any visible prompt to the user.

Technical analysis shows that this Trojan uses techniques associated with process manipulation and evasion, such as unmapping sections of memory and reading process memory, which are commonly used to inject code into other running processes or to hide its true activity from security tools. It also checks whether a debugger is present, a common tactic malware uses to detect analysis environments and avoid being studied. In addition, it gathers basic system and user information, such as the computer name and username, which can be used to fingerprint the infected machine or tailor further attacks.

Once fully installed, Lotok.V may give attackers a significant level of control over the infected system. This can include covertly deleting files, installing additional malware, stealing passwords and other sensitive data, and carrying out further malicious actions dictated by a remote attacker.

How It Usually Gets Onto Computers

Trojan.Lotok.V typically spreads by exploiting system vulnerabilities and security flaws, through downloads from compromised or malicious websites, or via email attachments from untrusted sources. These attachments may be disguised using a variety of file types, including .exe, .pif, .avi, and even .jpg files, to trick users into opening them. Because the Trojan can masquerade as a legitimate installer, users may unknowingly run it believing they are installing a harmless or useful program.

Risks for the User

The presence of Lotok.V on a system poses serious risks. Attackers may gain remote control over the infected computer, potentially leading to data theft, financial loss, identity theft, and further malware infections. The Trojan's ability to delete files and install additional malicious software can also result in system instability, data loss, and a compromised device that is difficult to fully restore without professional cleanup.

Signs of Infection

Infections of this type are often hard to notice because the malware is built to run invisibly. However, users may notice unusual temporary files appearing in system folders, unexpected processes launching on their own, slower system performance, unfamiliar programs or files appearing without explanation, or security software being disabled or malfunctioning.

How to Stay Protected

To reduce the risk of infection, users should avoid downloading software from untrusted or unofficial websites, be cautious of unsolicited email attachments regardless of their file extension, and keep their operating system and all installed software fully updated to close known security vulnerabilities. Running reputable, up-to-date security software and performing regular system scans can help detect and remove threats like Lotok.V before they cause serious damage. Maintaining regular backups of important files is also a prudent precaution against data loss caused by this type of Trojan.

Analysis Report

General information

Family Name:	Trojan.Lotok.V
Signature status:	No Signature

Known Samples

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Known Samples

This section lists other file samples believed to be associated with this family.

MD5: 852f249c7e06ec8d8ef23ec284fbd184 SHA1: 4f0a6a002965dc1fb6c928bf024c0b5ed3c546f4 SHA256: 98099691E2B6B30273B7ADA851BD6225F07E6E2360D08CE31ADEF835D4AD7741 File Size: 4.46 MB, 4457918 bytes

Windows Portable Executable Attributes

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Windows Portable Executable Attributes

This section lists file attributes found within family samples. These attributes are extracted from the files’ Windows PE (Portable Executable) specification and various system flags. Portable Executable Attributes give malware researchers insight into a file’s functionality, executable details, platform and runtime environment.

• File doesn't have "Rich" header
• File doesn't have debug information
• File doesn't have exports table
• File doesn't have relocations information
• File doesn't have security information
• File is 32-bit executable
• File is either console or GUI application
• File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
• File is Native application (NOT .NET application)
• File is not packed

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• IMAGE_FILE_DLL is not set inside PE header (Executable)
• IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

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File Icons

This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.

Windows PE Version Information

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Windows PE Version Information

This section displays values and attributes that have been set in the Windows file version information data structure for samples within this family. To mislead users, malware actors often add fake version information mimicking legitimate software.

Name	Value
Company Name	Igor Pavlov
File Description	7z Setup SFX
File Version	4.65
Internal Name	7zS.sfx
Legal Copyright	Copyright (c) 1999-2009 Igor Pavlov
Original Filename	7zS.sfx.exe
Product Name	7-Zip
Product Version	4.65

File Traits

• big overlay
• Gentee
• HighEntropy
• Installer Manifest
• Installer Version
• x86

Files Modified

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Files Modified

This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.

File	Attributes
\device\namedpipe\gmdasllogger	Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp	Synchronize,Write Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp\bios.rom	Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp\bios.rom	Synchronize,Write Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp\ec.rom	Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp\ec.rom	Synchronize,Write Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp\setup.exe	Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7zs5bd3.tmp\setup.exe	Synchronize,Write Attributes
c:\users\user\appdata\local\temp\genteeea.tmp	Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\temp\genteeea\guig.dll	Generic Read,Write Data,Write Attributes,Write extended,Append data

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c:\users\user\appdata\local\temp\genteeea\setup_temp.gea	Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\temp\genteert.dll	Generic Read,Write Data,Write Attributes,Write extended,Append data

Registry Modifications

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Registry Modifications

This section lists registry keys and values that were created, modified and/or deleted by samples in this family. Windows Registry activity can provide valuable insight into malware functionality. Additionally, malware often creates registry values to allow itself to automatically start and indefinitely persist after an initial infection has compromised the system.

Key::Value	Data	API Name
HKCU\software\microsoft\ctf\msutb::left	ঔ	RegNtPreCreateKey
HKCU\software\microsoft\ctf\msutb::top		RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75	�n / �v�ZT�����Bx#�� %� (�(X�1`1�1HO@V�H[uH�pN$ _�za$ b"hk`k�ql(�{b��P���! �/��Hu��� ����3 ���������X�����.�m�Ù��gi �V����$ �8წ���l�A �~� �=�SB1_B��T�Vw�`�V �R	RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75	�n 0 �v�ZT�����Bx#�� %� (�(X�1`1�1HO@V�H[uH�pN$ _�za$ b"he�vk`k�ql(�{b��P���! �/��Hu��� ����3 ���������X�����.�m�Ù��gi �V����$ �8წ���l�A �~� �=�SB1_B��T�Vw�`�	RegNtPreCreateKey

Windows API Usage

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Windows API Usage

This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.

Category	API
Anti Debug	IsDebuggerPresent
User Data Access	GetComputerName GetUserName GetUserObjectInformation
Process Manipulation Evasion	NtUnmapViewOfSection ReadProcessMemory
Process Shell Execute	CreateProcess

Shell Command Execution

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Shell Command Execution

This section lists Windows shell commands that are run by the samples in this family. Windows Shell commands are often leveraged by malware for nefarious purposes and can be used to elevate security privileges, download and launch other malware, exploit vulnerabilities, collect and exfiltrate data, and hide malicious activity.

.\setup.exe