TSPY_DYRE.JAY
PWS:Win32/Dyzap (Microsoft), a variant of Win32/Injector.BSXH (ESET), Trojan.Win32.Staser.avuh (Kaspersky)
Windows
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
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:
- %System%\config\systemprofile\Application Data\{random file name}.dat (for Windows XP and below)
- %AppDataLocal%\{random file name}.dat (for Windows Vista and above)
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 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.)
It drops the following copies of itself depending on the platform/operating system of the affected computer:
- %Windows%\{random file name}.exe (for Windows XP and below)
- %AppDataLocal%\{random file name}.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 registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\googleupdate
ImagePath = "%Windows%\{random file name}.exe"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\googleupdate
DisplayName = "Google Update Service"
It adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
(Default) = "%AppDataLocal%\{random file name}.exe" (for Windows Vista and above)
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\ControlSet001\
Services\googleupdate (for Windows XP and below)
Other Details
This spyware connects to the following possibly malicious URL:
- {BLOCKED}.{BLOCKED}.172.196
- stun1.{BLOCKED}clipse.net
- stun.{BLOCKED}thus.com
- stun.{BLOCKED}e.net
- stun.voip.{BLOCKED}c.com
- stun.{BLOCKED}ster.com
- stun.{BLOCKED}tia.org
- stun.{BLOCKED}a.com
- stun.{BLOCKED}tel.com.au
- stun.{BLOCKED}l.org
- stun.{BLOCKED}unt.com
- {BLOCKED}rver.org
- s1.{BLOCKED}a.net
- s2.{BLOCKED}a.net
- stun.{BLOCKED}d.de
- stun.{BLOCKED}ound.com
- numb.{BLOCKED}ie.ca
- stun.{BLOCKED}otocol.org
- stun.{BLOCKED}k.co.nz
- stun.{BLOCKED}ecom.se
It deletes the initially executed copy of itself