JS_NEMUCOD.KXYZ

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

It does not have any information-stealing capability.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

• http://{Domain}/counter/?id={Malware Generated ID}&rnd=9928021
• http://{Domain}/counter/?id={Malware Generated ID}&rnd=9928022
• http://{Domain}/counter/?id={Malware Generated ID}&rnd=9928023

It saves the files it downloads using the following names:

• %User Temp%\1254861.exe - detected as TROJ_KOVTER.K
• %User Temp%\1254862.exe - detected as TSPY_MIUREF.K
• %User Temp%\1254863.exe - non-malicious file containg codes to terminate self

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

The variable {domain} may be any of the following:

• {BLOCKED}vi.co.il
• {BLOCKED}nterviewer.com
• www.xperttrack.{BLOCKED}bd.com