TROJ_SLEFDEL.ET
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: No
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
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%\psass.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
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\CurrentControlSet\
Services\Windows-pass
Type = "110"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Windows-pass
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Windows-pass
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Windows-pass
ImagePath = "%System%\psass.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Windows-pass
DisplayName = "Windows-pass"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Windows-pass
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Windows-pass
Description = "Windows-ÃÜÂ밲ȫ"
Other Details
This Trojan deletes the initially executed copy of itself