Modified by: David John Agni
ALIASES:

Trojan:Win32/Sakurel.A (Microsoft), Trojan.Win32.Sakurel (Ikarus)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

Tamaño del archivo 141,104 bytes
Tipo de archivo EXE
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 15 Feb 2014

Arrival Details

This Trojan 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 Trojan drops the following copies of itself into the affected system and executes them:

  • %User Temp%\MicroMedia\MediaCenter.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It drops the following component file(s):

  • %User Temp%\MicroMedia\MicroSoftSecurityLogin.ocx

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It creates the following folders:

  • %User Temp%\MicroMedia

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
MicroMedia = "%User Temp%\MicroMedia\MediaCenter.exe"

HOSTS File Modification

This Trojan adds the following strings to the Windows HOSTS file:

  • csg.secure.snecma.fr 217.108.170.94
  • ctx.secure.snecma.fr 217.108.170.81
  • fdm.secure.snecma.fr 217.108.170.23
  • qa.fdm.secure.snecma.fr 217.108.170.27
  • qa.indigo.secure.snecma.fr 217.108.170.98
  • pi.secure.snecma.fr 217.108.170.96
  • qa.secure.snecma.fr 217.108.170.88
  • qasd.secure.snecma.fr 217.108.170.87
  • sd.secure.snecma.fr 217.108.170.199
  • int.tcua.secure.snecma.fr 217.108.170.18
  • qa.tcua.secure.snecma.fr 217.108.170.13
  • secure.snecma.fr 217.108.170.196

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://oa.{BLOCKED}sen.com/photo/qlvgtjvakctkec-197632229.jpg?resid=3685281
  • http://oa.{BLOCKED}sen.com/script.asp?imageid=qlvgtjvakctkec-197632229&type=0&resid=3685125&nmsg=up

It deletes the initially executed copy of itself