BKDR_CYCBOT.BGK

 Analysis by: Erika Bianca Mendoza

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This backdoor may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size:

286,720 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 Nov 2011

Arrival Details

This backdoor may be unknowingly downloaded by a user while visiting malicious websites.

Installation

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

  • %Program Files%\LP\7CCA\C29.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It creates the following folders:

  • %Program Files%\LP\7CCA
  • %Program Files%\LP

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
C29.exe = %Program Files%\LP\7CCA\C29.exe

Other System Modifications

This backdoor modifies the following registry key(s)/entry(ies) as part of its installation routine:

HKEY_CURRENT_CONFIG\Software\Microsoft\
windows\CurrentVersion\Internet Settings
ProxyEnable = 1

(Note: The default value data of the said registry entry is 0.)

Other Details

This backdoor connects to the following possibly malicious URL:

  • http://{BLOCKED}dlegion.com/16354.png?pr={values}
  • http://{BLOCKED}transferhere.com/logo.png?tq={values}
  • http://{BLOCKED}pidstore.com/logo.png?tq={values}
  • http://{BLOCKED}onicstheory.com/pics/sun.png?pr={values}

NOTES:
It may download other files and save them in the following location:

  • %Application Data%\{random}\

It then executes the downloaded files, thus the routines of the file are also exhibited on the system.