TSPY_NIMKEY.A
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan arrives as a file that exports the functions of other malware/grayware.
It modifies the Internet Explorer Zone Settings.
TECHNICAL DETAILS
1,022,464 bytes
DLL
No
10 Nov 2010
Arrival Details
This Trojan arrives as a file that exports the functions of other malware/grayware.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CLASSES_ROOT\CLSID\{460B4F43-12E1-474C-9103-54855F10C1E2}\
InprocServer32
(default) = {malware path and filename}
It registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{460B4F43-12E1-474C-9103-54855F10C1E2}
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CLASSES_ROOT\CLSID\{460B4F43-12E1-474C-9103-54855F10C1E2}
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\New Windows
Allow HTTPS = 1
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
WarnOnZoneCrossing = 0
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
WarnOnHTTPSToHTTPRedirect = 0
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
SOLUTION
8.900
7.608.03
10 Nov 2010
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Scan your computer with your Trend Micro product and note files detected as TSPY_NIMKEY.A
Step 3
Restart in Safe Mode
Step 4
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CLASSES_ROOT\CLSID
- {460B4F43-12E1-474C-9103-54855F10C1E2}
- {460B4F43-12E1-474C-9103-54855F10C1E2}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
- {460B4F43-12E1-474C-9103-54855F10C1E2}
- {460B4F43-12E1-474C-9103-54855F10C1E2}
Step 5
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\New Windows
- Allow HTTPS = 1
- Allow HTTPS = 1
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- WarnOnZoneCrossing = 0
- WarnOnZoneCrossing = 0
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- WarnOnHTTPSToHTTPRedirect = 0
- WarnOnHTTPSToHTTPRedirect = 0
Step 6
Search and delete the file detected as TSPY_NIMKEY.A
Step 7
Reset Internet security settings
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