Analysis by: MarfelTi
ALIASES:

Mcafee: BackDoor-CEP.svr

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size: 103,366 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 04 Aug 2011

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 files:

  • %WINDOWS%\windows\klog.dat
  • %User Profile%\Application Data\addon.dat

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It drops the following copies of itself into the affected system:

  • %WINDOWS%\windows\ixplorer

It creates the following folders:

  • %WINDOWS%\windows

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{115E5F54-4B19-0B24-6070-DBFD1EC1E5AD}
stubpath = %WINDOWS%\windows\ixplorer s

Other System Modifications

This backdoor adds the following registry keys:

HKEY_CURRENT_USER\Software\Bifrost

HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{115E5F54-4B19-0B24-6070-DBFD1EC1E5AD}