live casino online

This Trojan overwrites the Master Boot Record (MBR) with new codes. It also contains a TSPY_URELAS.A. The spyware captures screenshots of Korean games being played on the user's system. This may result in the user's game accounts being compromised.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

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 executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

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.

Installation

This Trojan drops the following copies of itself into the affected system and executes them:

• %User Temp%\~DFA{random}.tmp

(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.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
Run = "{Malware path and file name}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
SubKey = "~DFA{random}"

Other System Modifications

This Trojan deletes the following files:

• %System Root%\gdisk.exe
• %System%\gdisk.exe
• %Windows%\gdisk.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.. %Windows% is the Windows folder, which is usually C:\Windows.)

Dropping Routine

This Trojan drops the following files:

• {malware path}\{random file name 1}.exe - detected as TSPY_URELAS.A
• {malware path}\{random file name 2}.exe - detected as TSPY_URELAS.A
• {malware path}\gbp.ini - contains encrypted remote IP addresses read by TSPY_URELAS.A

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

Download Routine

This Trojan accesses the following websites to download files:

• {BLOCKED}.{BLOCKED}.205.36
• {BLOCKED}.{BLOCKED}.28.139
• {BLOCKED}.{BLOCKED}.28.146

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

As of this writing, the said sites are inaccessible.

NOTES:

In its resource, this Trojan contains a ZIP archive. The extracted executable file is detected as TSPY_URELAS.A

It overwrites the MBR with new codes and _GBP as the infection marker.