WORM_PROLACO.AI
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This worm arrives as attachment to mass-mailed email messages. It 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 an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
TECHNICAL DETAILS
Arrival Details
This worm arrives as attachment to mass-mailed email messages.
It arrives via removable drives.
It may arrive via network shares.
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 drops the following files:
- %User Profile%\Application Data\SystemProc\lsass.exe
(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 drops the following copies of itself into the affected system:
- %System%\HPWuSchde.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 Updater v1.0 = %System%\HPWuSchde.exe
Other System Modifications
This worm adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer
hk1 = {month of execution}
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer
hk2 = {day of execution}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
UACDisableNotify = 1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = 0
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\FirewallPolicy\
StandardProfile\AuthorizedApplications\List
%System%\HPWuSchde.exe = %System%\HPWuSchde.exe:*:Enabled:Explorer
It adds the following registry keys as part of its installation routine:
HKEY_CURRENT_USER\Software\HP10
HKEY_LOCAL_MACHINE\SOFTWARE\HP10
Propagation
This worm creates the following folders in all removable drives:
- {drive letter}:\RECYCLER
- {drive letter}:\RECYCLER\S-1-6-21-2434476521-1645641927-702000330-1542
It drops the following copy(ies) of itself in all removable drives:
- {drive letter}:\RECYCLER\S-1-6-21-2434476521-1645641927-702000330-1542\redmond.exe
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
Other Details
This worm connects to the following URL(s) to get the affected system's IP address:
- http://{BLOCKED}myip.com/automation/n09230945.asp