Analysis by: David John Agni
 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This spyware 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

File Size: 540,672 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 05 Feb 2015

Arrival Details

This spyware 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 spyware drops the following files depending on the platform/operating system of the affected computer:

  • %Windows%\{Random Filename}.exe (for Windows XP and Below)
  • %AppDataLocal%\{Random Filename}.exe (for Windows Vista and Above)

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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 spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run (for Windows Vista and Above)
(Default) = "%AppDataLocal%\{Random Filename}.exe"

It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate (for Windows XP and Below)
DisplayName = "Google Update Service"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\googleupdate (for Windows XP and Below)
ImagePath = "%Windows%\{Random Filename}.exe"

Other Details

This spyware connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.206.253
  • {BLOCKED}.{BLOCKED}.214.158
  • {BLOCKED}.{BLOCKED}.242.226
  • {BLOCKED}.{BLOCKED}.235.120
  • {BLOCKED}.{BLOCKED}.148.193
  • {BLOCKED}.{BLOCKED}.66.72
  • {BLOCKED}.{BLOCKED}.149.32
  • {BLOCKED}.{BLOCKED}.202.238
  • nhgyzrn2p2gejk57wveao5kxa7b3nhtc4saoonjpsy65mapycaua.{BLOCKED}2.i2p

It deletes the initially executed copy of itself