W32.Gaobot!inf
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Re(3): W32.Gaobot!inf
03.05.2004, 18:20:59
Hi!

Unfortunately, I'm not sure in which way this variant differs from the "original" Gaobot worm, but some basic steps are:

- checking the registry under
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run and
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
for unknown or suspicious entries

- look for files that are named similar or identical to the Windows system files but reside in directories other than the original ones (most system files are located under \Winnt\system32).
Some viruses also name themselves similar to well known Anti-Virus software components.

- if you're using Windows XP, use "netstat -a -o" in a cmd prompt to identify tasks that listen on TCP ports above 1023. Unknown tasks may be the virus.

- try using msconfig to find tasks that are being loaded thru registry on startup

If you are unable to start regedit and/or msconfig because they terminate immediately, rename the files from .exe to .com. They will still work, but the worm won't recognize them.
regedit.exe can be found in \Winnt, msconfig.exe in \Winnt\PCHEALTH\HELPCTR\Binaries

It's also a good idea to do an online virusscan like http://housecall.trendmicro.com/

Remember to disable the system restore "feature" in Windows XP prior to these steps as Windows will restore the infected files, making all your efforts useless.
Also, disconnect your network cable/modem from your PC while performing the cleanup and enable the Internet Connection Firewall (or use another personal firewall) afterwards.

PS: Nice to see english speaking participants here, too!

hope that helps,

greetz

glockman B-)

- Ich bin ein Geek und steh dazu -
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