WORM_LBUCK.A

 Analysis by: rolandde

 ALIASES:

Trojan:Win32/VB.AGP (Microsoft); Mal/Emogen-H (Sophos)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This worm arrives via removable drives. It 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:

65,536 bytes

File Type:

EXE

Initial Samples Received Date:

11 Nov 2011

Arrival Details

This worm arrives via removable drives.

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

  • %System Root%\lsasss.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
lsasss = "%System Root%\lsasss.exe"

Propagation

This worm drops the following copy(ies) of itself in all removable drives:

  • Money.exe
  • Pictures.exe
  • Documents.exe
  • Music.exe
  • Films.exe
  • Mp3.exe

Other Details

This worm connects to the following possibly malicious URL:

  • http://{BLOCKED}c5cc.{BLOCKED}kbucks.com
  • http://{BLOCKED}9e.{BLOCKED}kbucks.com
  • http://{BLOCKED}7f.{BLOCKED}kbucks.com
  • http://{BLOCKED}9d.{BLOCKED}kbucks.com
  • http://{BLOCKED}99.{BLOCKED}kbucks.com
  • http://{BLOCKED}97.{BLOCKED}kbucks.com
  • http://{BLOCKED}f4.{BLOCKED}kbucks.com
  • http://{BLOCKED}80.{BLOCKED}kbucks.com
  • http://{BLOCKED}b3.{BLOCKED}kbucks.com