Threat Database Trojans Trojan.Lumma.S

Trojan.Lumma.S

By CagedTech in Trojans

Threat Scorecard

Popularity Rank: 24,832
Threat Level: 80 % (High)
Infected Computers: 3
First Seen: October 15, 2024
Last Seen: May 14, 2026
OS(es) Affected: Windows

The detection of Trojan.Lumma.S on your system indicates a potential security threat that requires immediate attention. This report aims to provide you with a comprehensive understanding of the threat, its operating mechanisms, symptoms of infection, and most importantly, steps to remove it from your system.

What Is Trojan.Lumma.S?

Trojan.Lumma.S is identified as a Trojan-type threat, which is a broad category of malware designed to deceive users into installing it on their systems. Unlike viruses or worms, Trojans do not replicate themselves but can cause significant harm by stealing data, installing additional malware, or providing unauthorized access to your system. The name "Trojan.Lumma.S" itself does not directly indicate a specific malware family but suggests it is a variant within the broader Trojan category.

How Trojan.Lumma.S Operates

Trojans like Trojan.Lumma.S typically operate by disguising themselves as useful or harmless applications. Once installed, they can perform a variety of malicious actions. These can include data theft (such as login credentials, personal information, or financial data), installation of additional malware, modification of system settings, or even allowing remote access to the infected system. The exact operation of Trojan.Lumma.S would depend on its specific design and the intentions of its creators, but the general behavior of Trojans involves exploiting the system for malicious purposes without the user's knowledge or consent.

Symptoms of Infection

Symptoms of a Trojan infection can vary widely but often include noticeable system slowdowns, frequent crashes, or unusual network activity. You might also observe unfamiliar programs or toolbars in your browser, unexpected changes in system settings, or pop-ups and other unwanted advertisements. In some cases, the infection might not display overt symptoms, making it difficult to detect without proper scanning tools. It's crucial to be vigilant and monitor your system's behavior regularly to identify any potential threats early on.

How to Remove Trojan.Lumma.S

  1. Enter Safe Mode with Networking: This will help prevent the malware from loading and interfering with the removal process. Restart your computer, and as it boots up, press the key that opens the boot menu (this varies by manufacturer but is often F8, F12, or Del). Select Safe Mode with Networking to proceed.
  2. Conduct a Full Scan: Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system. Ensure your antivirus and anti-malware definitions are up to date before scanning to maximize the chances of detecting and removing the threat.
  3. Uninstall Suspicious Programs: Go through your installed programs and uninstall any that you do not recognize or that were installed around the time the infection was detected.
  4. Reset Your Browser: If your browser has been affected, reset it to its default settings. This can usually be done through the browser's settings menu (e.g., Chrome, Firefox, Edge) and will remove any unwanted extensions or changes made by the malware.
  5. Reboot and Re-scan: After completing the above steps, reboot your system to ensure all changes take effect. Then, perform another scan with your anti-malware tool to confirm that the threat has been successfully removed.

Conclusion

Removing Trojan.Lumma.S from your system requires careful and methodical steps to ensure the malware is completely eradicated. It's essential to stay informed and take proactive measures to protect your system from future threats, including keeping your software up to date, using strong antivirus and anti-malware protection, and being cautious when downloading and installing applications. By following the guidance provided and maintaining good cybersecurity practices, you can significantly reduce the risk of infection and keep your system secure.

Analysis Report

General information

Family Name: Trojan.Lumma.S
Signature status: No Signature

Known Samples

MD5: 4d4186dbf091849c180033f6b517c391
SHA1: 4a6c1629a50b4853f698e9efbaa8425ac2cc5909
SHA256: 51DA49AC8D03960E2118236AE1ED090A0EC5DB2AD7FE7A8D41275663695647BD
File Size: 5.21 MB, 5209600 bytes
MD5: c9748b4cde017766f9de21b791d80304
SHA1: 2f3ae16a3651941d90724e15f105f3ab0d4ebf6c
SHA256: 7ED1C3313959FFC07EA003BE92D26D0BCB90F8F24BBB567FDCB9D4C7DBF59517
File Size: 5.19 MB, 5190144 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have resources
  • File doesn't have security information
  • File is 64-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 Traits

  • golang
  • No Version Info
  • x64

Block Information

Total Blocks: 11,491
Potentially Malicious Blocks: 6
Whitelisted Blocks: 11,474
Unknown Blocks: 11

Visual Map

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... Data truncated
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

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Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlpcConnectPort
  • ntdll.dll!NtAlpcSetInformation
  • ntdll.dll!NtAssociateWaitCompletionPacket
  • ntdll.dll!NtClose
  • ntdll.dll!NtCreateIoCompletion
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateTimer2
  • ntdll.dll!NtCreateWaitCompletionPacket
  • ntdll.dll!NtCreateWorkerFactory
Show More
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQuerySystemInformation
  • ntdll.dll!NtQuerySystemInformationEx
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtReadVirtualMemory
  • ntdll.dll!NtRemoveIoCompletionEx
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSetTimerEx
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWriteFile
  • ntdll.dll!NtYieldExecution
  • UNKNOWN
Network Winsock2
  • WSAStartup

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