BKDR_BEDEP.SDGO

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 arrives as a component bundled with malware/grayware packages.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information. However, as of this writing, the said sites are inaccessible.

It requires its main component to successfully perform its intended routine.

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.

It arrives as a component bundled with malware/grayware packages.

Installation

This backdoor adds the following mutexes to ensure that only one of its copies runs at any one time:

• Global\{GUID}

It injects codes into the following process(es):

• iexplore.exe
• firefox.exe
• chrome.exe

Backdoor Routine

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

• initialize connection
• download and execute arbitrary files
• update self with click fraud module
• report information

It connects to the following websites to send and receive information:

• http://{random generated domain}.com/{URI}

It posts the following information to its command and control (C&C) server:

• build ID
• bot ID
• processor (32 or 64-bit)
• OS version
• protocol version
• cookie

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

Other Details

This backdoor requires its main component to successfully perform its intended routine.

NOTES:

It access the following website to get data that will be used to generate {random generated domain}:

• http://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml?{hex values}

The downloaded click fraud module is used to communicate with advertisement fraud servers to access various ads.