BKDR_KULUOZ.PQ

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

It deletes itself after execution.

Arrival Details

This backdoor 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 backdoor drops the following copies of itself into the affected system:

• %AppDataLocal%\{random}.exe

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

It leaves the following text files:

• {Malware Path and Filename}.txt

Other Details

This backdoor connects to the following possibly malicious URL:

• http://{BLOCKED}.{BLOCKED}.130.18:993
• http://{BLOCKED}.{BLOCKED}.35.190:8080
• http://{BLOCKED}.{BLOCKED}.214.158:8080
• http://{BLOCKED}.{BLOCKED}.236.197:8080
• http://{BLOCKED}.{BLOCKED}.229.232:8080
• http://{BLOCKED}.{BLOCKED}.140.241:8080
• http://{BLOCKED}.{BLOCKED}.42.27:8080

It deletes itself after execution.

NOTES:

Upon execution, this backdoor opens its dropped non-malicious .TXT file {Malware Path and File name}.txt in order to hide its malicious routines from the user.