Worm/Opasoft.P - Worm

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Full description

Alias:	W32/Opaserv.worm.ac [McAfee], Worm.Win32.Opasoft.p [KAV], Win32/Opaserv.AA.worm [GeCAD]
Type:	Worm
Size:	24,064 Bytes
Origin:
Date:	00-00-0000
Damage:	Spreads over unprotected network resources.
VDF Version:	6.23.00.00
Danger:	Low
Distribution:	Medium

DistributionIt tries to spread over unprotected network resources.

Technical DetailsWhen activated, Worm/Opasoft.P checks for 'SpeedBoss' in the registry entry:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
If present, the related file is deleted. If not, the worm checks for 'Spees2' in the registry entry:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
If not present, the worm registers:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "Spees2"="%WinDIR%\Speedy.bat"

After controlling the registry and the place of its activity, the worm ensures that it has only one version in system memory, using a Mutex named SpeedyDoS2!.
The worm uses a security vulnerability of Microsoft Windows 95/98/Me. It sends single password characters to the network resource for accessing other Windows 95/98/Me files, without knowing the password.
The affected systems are:
Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows 98 Second Edition
Microsoft Windows Me

It creates the file C:\lentao!, that contains the text: "run=c:\windows\speedy.bat".

It looks like the worm is able to update itself, reading files from a website.

See a brief description here.

Description inserted by Crony Walker on Tue, 15 Jun 2004 14:00 (GMT+1)

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