WORM_DELFINJE.HJ
Windows 2000, XP, Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm arrives via removable drives. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops copies of itself in all removable drives. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
TECHNICAL DETAILS
803,840 bytes
EXE
Yes
05 Aug 2010
Arrival Details
This worm arrives via removable drives.
It 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 adds the following folders:
- %Program Files%\Mozilla Firefox\extensions\{9CE11043-9A15-4207-A565-0C94C42D590D}
- %User Profile%\Application Data\SystemProc
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %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 drops the following copies of itself into the affected system:
- %System%\HPWuSchd10.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
HP Software Updater10 = %System%\HPWuSchd10.exe
Other System Modifications
This worm adds the following registry keys:
HKEY_CURRENT_USER\Software\HP10
=
HKEY_LOCAL_MACHINE\SOFTWARE\HP10
=
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer
hav1lett = {number}
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer
fuck1tard = {number}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
RTHDBPL = %User Profile%\Application Data\SystemProc\lsass.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = 0
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%System%\\HPWuSchd10.exe = %System%\HPWuSchd10.exe:*:Enabled:Explorer
Propagation
This worm drops copies of itself in all removable drives.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
open=RECYCLER\S-1-6-21-2434476521-1645641927-702000330-1542\redmond.exe
icon=%SystemRoot%\system32\SHELL32.dll,4
action=Open folder to view files
shell\open=Open
shell\open\command=RECYCLER\S-1-6-21-2434476521-1645641927-702000330-1542\redmond.exe
shell\open\default=1
Dropping Routine
This worm drops the following files:
- %Program Files%\Mozilla Firefox\extensions\{9CE11043-9A15-4207-A565-0C94C42D590D}\chrome\content\timer.xul - detected as JS_DURSG.H
- %User Profile%\Application Data\SystemProc\lsass.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %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.)
Other Details
This worm connects to the following URL(s) to get the affected system's IP address:
- http://whatismyip.com/automation/n09230945.asp
SOLUTION
8.900
7.364.09
05 Aug 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
Restart in Safe Mode
Step 3
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
- HP Software Updater10=%System%\HPWuSchd10.exe
- HP Software Updater10=%System%\HPWuSchd10.exe
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
- hav1lett={number}
- hav1lett={number}
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
- fuck1tard={number}
- fuck1tard={number}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
- RTHDBPL=%User Profile%\Application Data\SystemProc\lsass.exe
- RTHDBPL=%User Profile%\Application Data\SystemProc\lsass.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
- EnableLUA=0
- EnableLUA=0
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %System%\HPWuSchd10.exe=%System%\HPWuSchd10.exe:*:Enabled:Explorer
- %System%\HPWuSchd10.exe=%System%\HPWuSchd10.exe:*:Enabled:Explorer
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_CURRENT_USER\Software
- HP10
- HP10
- In HKEY_LOCAL_MACHINE\SOFTWARE
- HP10
- HP10
Step 5
Restore this modified 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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ERSvc
- From: Start=4
To: 2
- From: Start=4
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc
- From: Start=4
To: 2
- From: Start=4
Step 6
Search and delete these folders
%User Profile%\Application Data\SystemProc
Step 7
Scan your computer with your Trend Micro product to delete files detected as WORM_DELFINJE.HJ. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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