JS_NEMUCOD.ELDSAOL

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It does not have any propagation routine.

It does not have any backdoor routine.

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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://www.{BLOCKED}s.{BLOCKED}t.ru/87b3ff3rc?ClKmkSII=GLdeUD -> Inaccessible
• http://www.{BLOCKED}naomc.com/87b3ff3rc?ClKmkSII=GLdeUD - > Inaccessible
• http://{BLOCKED}c.{BLOCKED}daancha.net/87b3ff3rc?ClKmkSII=GLdeUD -> Accessible
• http://{BLOCKED}ppppsr.biz/js/87b3ff3rc?ClKmkSII=GLdeUD -> Inaccessible

It saves the files it downloads using the following names:

• %User Temp%\ttqqcenUID1 ->temporary storage for encrypted downloaded file
• %User Temp%\ttqqcenUID2 -> temporary storage for encrypted downloaded file
• %User Temp%\ttqqcenUID3 -> temporary storage for encrypted downloaded file
• %User Temp%\ttqqcenUID4 -> temporary storage for encrypted downloaded file
• %User Temp%\ttqqcenUID1.dll -> decrypted file
• %User Temp%\ttqqcenUID2.dll -> decrypted file
• %User Temp%\ttqqcenUID3.dll -> decrypted file
• %User Temp%\ttqqcenUID4.dll -> decrypted file

(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.)

Other Details

This Trojan does the following:

• It executes the downloaded files using the following commands: "%System%\rundll32.exe" "%User Temp%\{filename}",qwerty
  where {filename} could be one of the following:
  • ttqqcenUID1.dll
  • ttqqcenUID2.dll
  • ttqqcenUID3.dll
  • ttqqcenUID4.dll

(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.)

NOTES:

It does not have rootkit capabilities.

It does not exploit any vulnerability.