BKDR_NITOL.GD
DDoS:Win32/Nitol.A (Microsoft), Backdoor.Trojan (Symantec), Trojan.Win32.Scar.cwqw (Kaspersky)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to a website to send and receive information.
TECHNICAL DETAILS
67,370 bytes
EXE
04 Dec 2013
Arrival Details
This backdoor 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 backdoor drops the following copies of itself into the affected system and executes them:
- %System%\{random}.exe
- %System%\hra33.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It drops the following files:
- %User Temp%\{random}.tmp
- %User Temp%\SOFTWARE.LOG
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This backdoor 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\Distribumkq
ImagePath = "%System%\{random}.exe"
Other System Modifications
This backdoor adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Distribumkq
Backdoor Routine
This backdoor connects to the following websites to send and receive information:
- {BLOCKED}35.3322.org
NOTES:
It drops the following copy of itself in all folders and RAR archives in all physical and removable drives containing an EXE file:
- lpk.dll