TSPY_INFOSTEAL.TIDAOCI

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

However, as of this writing, the said sites are inaccessible.

Arrival Details

This Trojan Spy 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 Spy drops the following copies of itself into the affected system:

• %Desktop%\firefox.exe

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista, 7, and 8.)

It drops the following files:

• %Application Data%\DST Systems\DST Systems.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)

Autostart Technique

This Trojan Spy modifies the following registry entry(ies) to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Application = "%Desktop%\firefox -boot"

Other System Modifications

This Trojan Spy also creates the following registry entry(ies) as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
DST Systems = "%Application Data%\DST Systems\DST Systems.exe"

Other Details

This Trojan Spy connects to the following URL(s) to get the affected system's IP address:

• http://checkip.dyndns.org

It connects to the following possibly malicious URL:

• {BLOCKED}a.org:443

However, as of this writing, the said sites are inaccessible.