WORM_NUQEL.VXE
Worm:Win32/Nuqel.Z(Microsoft)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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
8,859,648 bytes
EXE
Yes
24 Feb 2016
Arrival Details
This worm 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 worm drops a copy of itself in the following folders using different file names:
- %Windows%\regsvr.exe
- %System%\regsvr.exe
- %System%\svchost.exe
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It creates the following folders with attributes set to System and Hidden to prevent users from discovering and removing its components:
- %System%\28463
- %Temporary Internet Files%\Virtualized
- %Application Data%\Microsoft\Windows\Privacl\Low
- %Application Data%\Microsoft\Windows\IECompatCache\Low
- %Application Data%\Microsoft\Windows\IETIdCache\Low
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Temporary Internet Files% is the Temporary Internet Files folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), and Windows Server 2008; C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), and Windows Server 2012.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 worm modifies the following registry entries to ensure it automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Msn Messenger = "%System%\regsvr.exe"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
shell = "Explorer.exe regsvr.exe"
Download Routine
This worm accesses the following websites to download files:
- www.yahoo.com/{BLOCKED}g.doc
Other Details
This worm sets the attributes of the following file(s) to Hidden and System:
- %System%\regsvr.exe
- %System%\svchost.exe
- %System%\setup.ini
- %System%\setting.ini
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It drops the following file(s)/component(s):
- %System%\setting.ini
- %System%\setup.ini
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)