Home Malware Programs Trojans Trojan:Win32/Loktrom.B

Trojan:Win32/Loktrom.B

Posted: January 16, 2013

Threat Metric

Threat Level: 9/10
Infected PCs: 82
First Seen: January 16, 2013
OS(es) Affected: Windows

Trojan:Win32/Loktrom.B is a ransomware Trojan that affects PC users in various countries. Trojan:Win32/Loktrom.B locks the targeted computer system and displays a bogus full-screen warning message that covers the desktop. The tricky alert pretends to come from a legal authority which states a relation with Windows and Microsoft Security Essentials. The fake warning message of ransomware demands a ransom from victims to be paid for the imaginary storage of illegal files. Trojan:Win32/Loktrom.B may make continuous changes to the affected PC that make it difficult for the PC user to download, install, run, or update anti-virus software. Trojan:Win32/Loktrom.B may be installed on the vulnerable computer system by other malware infections, or it may enter the PC via a drive-by downloads. When activated, Trojan:Win32/Loktrom.B modifies the registry entries to assure its copy loads every time you start Windows. Trojan:Win32/Loktrom.B can also set the value as a random string in the registry entry.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:



xxx_video.exe File name: xxx_video.exe
Size: 134.99 KB (134997 bytes)
MD5: 7469d2bce990dc340841698795a6174b
Detection count: 82
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: January 22, 2013
2606981.exe File name: 2606981.exe
Size: 92.67 KB (92672 bytes)
MD5: d09c386f3bb13aacf185afbbc87f5802
Detection count: 81
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: January 22, 2013
4655818.exe._ File name: 4655818.exe._
Size: 92.67 KB (92672 bytes)
MD5: 930935904e8d2914953b0e3b63be2656
Detection count: 77
Mime Type: unknown/_
Group: Malware file
Last Updated: January 22, 2013
6979999.exe File name: 6979999.exe
Size: 374.29 KB (374299 bytes)
MD5: 87ff01ce77ab71cc4953c6cbca3ef96b
Detection count: 75
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: January 22, 2013

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "[RANDOM NAME]", for example "S1249087" = "[MALWARE FILE NAME]"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "explorer" = "[MALWARE FILE NAME]"HKEY_CURRENT_USER\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon "Shell" = "[MALWARE FILE NAME]"
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