BKDR_KIRPICH.B

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.

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:

• %Cookies%\winifg.dat
• %User Profile%\Application Data\Microsoft\Messenger\SpeechEngines\xpmsgr.exe
• %Application Data%\Microsoft\Media Player\wmpaud1.wav
• %User Profile%\ha.hiv
• %User Profile%\hb.hiv

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

It creates the following folders:

• %User Profile%\Application Data\Microsoft\Messenger\SpeechEngines
• %User Profile%\Application Data\Microsoft\Messenger

(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.)

Other System Modifications

This backdoor adds the following registry keys:

HKEY_CURRENT_USER\Software\HPprinter

It adds the following registry entries:

HKEY_CURRENT_USER\Software\HPprinter
load = "%User Profile%\Application Data\Microsoft\Messenger\SpeechEngines\xpmsgr.exe"

Other Details

This backdoor connects to the following possibly malicious URL:

• {BLOCKED}.{BLOCKED}-ip.com:80