TROJ_HILOTI.EP
Trojan:Win32/Hiloti.gen!D (Microsoft); Hiloti.gen.q (Mcafee)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan drops file(s)/component(s).
It injects itself into certain processes as part of its memory residency routine.
TECHNICAL DETAILS
Installation
This Trojan drops the following file(s)/component(s):
- %Windows%\{random name}.dll - non-malicious file
- %User Profile%\Local Settings\Application Data\{Random CLSID for Firefox}\chrome.manifest - non-malicious file
- %User Profile%\Local Settings\Application Data\{Random CLSID for Firefox}\chrome\content\_cfg.js - non-malicious file
- %User Profile%\Local Settings\Application Data\{Random CLSID for Firefox}\chrome\content\overlay.xul - detected as JS_GORD.F
- %User Profile%\Local Settings\Application Data\{Random CLSID for Firefox}\install.rdf - non-malicious file
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It creates the following folders:
- %User Profile%\Local Settings\Application Data\{Random CLSID for Firefox}
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It injects itself into the following processes as part of its memory residency routine:
- explorer.exe
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random} = rundll32.exe "{malware path and filename}",Startup
Other System Modifications
This Trojan adds the following registry keys as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\{random characters}
SOLUTION
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
Remove malware files dropped/downloaded by TROJ_HILOTI.EP
- JS_GORD.F
Step 3
Scan your computer with your Trend Micro product and note files detected as TROJ_HILOTI.EP
Step 4
Restart in Safe Mode
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\Windows\CurrentVersion\Run
- {random} = rundll32.exe "{malware path and filename}",Startup
- {random} = rundll32.exe "{malware path and filename}",Startup
Step 6
Search and delete these folders
Step 7
Search and delete the file detected as TROJ_HILOTI.EP
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