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BKDR_SYKIPOT.A

October 09, 2012
 Analysis by: Cris Nowell Pantanilla
 ALIASES:

Backdoor.Win32.Sykipot.an [Kaspersky] Trojan:Win32/Wisp.gen!A [Microsoft]

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  TECHNICAL DETAILS

File Size:

37,888 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

01 Nov 2010

Installation

This backdoor drops the following component file(s):

  • %User Temp%\bsunday.dll

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

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

  • %User Temp%\adobeupdate.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
bsunday = "%User Temp%\adobeupdate.exe -installkys"

Other Details

This backdoor connects to the following possibly malicious URL:

  • https://{BLOCKED}og.{BLOCKED}ayparty.com