TROJ_FAKEAV.LWZ

May 31, 2013
 Analysis by: Nikko Tamana
 ALIASES:

Rogue:Win32/FakeRean (Microsoft), Troj/FakeAV-GOU (Sophos), FraudTool.Win32.FakeRean (Sunbelt), Trojan.Win32.FakeAV (Ikarus)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

  TECHNICAL DETAILS

File Size:

828,928 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

03 May 2013

Payload:

Connects to URLs/IPs, Terminates processes, Displays message/message boxes

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.

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Internet Security = "{Malware Path and File Name}.exe"

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\{random values}
FRun = "0"

HKEY_CURRENT_USER\Software\{random values}
O`ld = "Houdsodu!Rdbtshux"

HKEY_CURRENT_USER\Software\{random values}
Q`ui = "B;]Enbtldour!`oe!Rduuhofr]@elhohrus`uns]Edrjunq]b/dyd"

It adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\{random values}

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}rtal360.com/404.php?id=47
  • http://{BLOCKED}tsecurity.com/buynow.php?bid=47
  • http://{BLOCKED}.{BLOCKED}payusauto.com:443