TROJ_NITOL.DUKKW
Trojan.Win32.Staser.tdv(Kaspersky); RDN/Generic.dx!d2d( McAfee); DDoS:Win32/Nitol.A(Microsoft)
Windows
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
39,424 bytes
EXE
13 Aug 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:
- %System%\{random filename}.exe
- %User Temp%\SOFTWARE.LOG
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %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 files:
- %System%\hra33.dll
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Autostart Technique
This Trojan 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\Distribuemf
DisplayName data = Distribubcl Transaction Coordinator Service
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Distribuemf
ImagePath = %System%\{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\ControlSet001\
Services\Distribuemf
Other Details
This Trojan deletes the initially executed copy of itself
NOTES:
This worm drops lpk.dll file in all folders in all physical and removable drives containing an .EXE file.