TROJ_NITOL.SMJ
Mal/Nitol-C (Sophos), W32/Dropper.RNS!tr (Fortinet), Trojan.Win32.MicroFake (Ikarus), Trojan.Win32.MicroFake.ba (Kaspersky), DDoS:Win32/Nitol.A (Microsoft)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
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.
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 file(s)/component(s):
- %System%\quwquy.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It drops the following copies of itself into the affected system:
- %System Root%\Documents and Settings\Administrator\Local Settings\Temp\lpk.dll
- %System Root%\Documents and Settings\Administrator\Local Settings\Temp\0000679d\lpk.dll
- %System%\hra33.dll
- %All Users Profile%\Application Data\lpk.dll
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.. %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)
It creates the following folders:
- %System Root%\Documents and Settings\Administrator\Local Settings\Temp
- %System Root%\Documents and Settings\LocalService\Application Data\WinRAR
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\National
It adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\National
ImagePath = "%System%\quwquy.exe"
NOTES:
This malware drops copies of itself in folders where the executable file of each running process as lpk.DLL.
It also drops a copy of itself in other drives.