TROJ_DIDKR.B

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be downloaded from the following remote site(s):

• http://{BLOCKED}ri.com/app/songsari_setup.exe

Installation

This Trojan drops the following files:

• %User Temp%\RarSFX0\songsari.exe
• %User Temp%\RarSFX0\songsariup.exe - detected as TROJ_DIDKR.B

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Download Routine

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

• http://www.{BLOCKED}g.co.kr/images/korea/d.jpg

NOTES:

The dropped malware file songsariup.exe connects to the above mentioned URL address to download another malware. Once executed, the downloaded file creates the following folders:

• %Application Data%\tor
• %Application Data%\Identities\{GUID}

It drops and executes the following files:

• %Application Data%\Identities\{GUID}\{Random FileName 1} - TROJ_DIDKR.B
• %Application Data%\Identities\{GUID}\{Random FileName 2} - Tor Client

It uses a file name similar to a legitimate file to pass as a legitimate file.

It drops the following component files:

• %Application Data%\Identities\{GUID}\config.ini - contains filename of the tor client, affected machine's ip address and country