BKDR_PROXY.HI

This backdoor may be dropped by other malware.

It does not have any propagation routine.

It executes commands from a remote malicious user, effectively compromising the affected system.

It does not drop any other file.

As of this writing, the said sites are inaccessible.

Arrival Details

This backdoor may be dropped by the following malware:

• TROJ_MDROPR.HI

Propagation

This backdoor does not have any propagation routine.

Backdoor Routine

This backdoor executes the following commands from a remote malicious user:

• Execute files
• Perform remote shell
• Sleep for a specified amount of time
• Download files
• Delete self

It connects to the following URL(s) to send and receive commands from a remote malicious user:

• http://{BLOCKED}.{BLOCKED}.233.241/grc/index.asp?id=flag:418xls%20host:{Host Name}%20IP:{IP Address}%20OS:{OS Version}%20vm:{special character}%20proxy:{special character}

Dropping Routine

This backdoor does not drop any other file.

Download Routine

This backdoor accesses the following websites to download files:

• http://{BLOCKED}.{BLOCKED}.233.241/a.asp?id={random value}
• http://{BLOCKED}.{BLOCKED}.233.241/b.asp?id={random value}

It saves the files it downloads using the following names:

• %User Temp%\temp.ini

(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.)

As of this writing, the said sites are inaccessible.

Information Theft

This backdoor gathers the following data:

• Host Name
• Local IP Address
• OS Version

NOTES:

This backdoor does not have rootkit capabilities.

It does not exploit any vulnerability.