Katien.n Backdoor

[justin]

When Microsoft Antispyware runs at night it occasionally
finds a backdoor called Katien.n I deleted it and run a
scan and it finds nothing, so I assume I am clean. A
couple of days later I get a message it found it again
during the nightly scan. The file infected is
iexplorer.exe.

Here are my questions.

1. Why doesn't the realtime monitor of Antispyware prevent
this from getting on the computer. This computer is
running windows 2003 server(not a domain controller).

2. How do I prevent it from coming back?

 

[Bill Sanderson]

My guess is that you aren't in fact, getting clean.

Restart in safe mode and do full, deep scans until one comes through clean.
Scanning with your antivirus would also be a good idea.

 

[JohnF.]

If you are under attack and MSAS does not seem to help:

*Submit suspected spyware report in the tools menu of MSAS*

PREP YOUR MACHINE FIRST!
- IF you are using Spybot S/D, UN-Immunize your computer
- IF you are using Adaware, turn off AD-Watch
- Disable all other active anti-spy applications
- Dump all temporary file locations and Internet files

1. Download:
lspfix.exe www.cexx.org/lspfix.htm
winsockxpfix.exe www.snapfiles.com/get/winsockxpfix.html
ccleaner.exe www.ccleaner.com
killbox.exe www.bleepingcomputer.com/files/killbox.php

2. Clean out all temp file locations with ccleaner.exe

3. Install and use killbox to delete stubborn files

4. Reboot into safe mode - http://tinyurl.com/pfca
5. Run MSAS at least twice in full/deep mode
6. Run a robust, updated antivirus software scan
7. Reboot into normal mode,see if problem has been corrected

8. If you think something is there but can't see it, download:
- Blacklight by F-Secure
www.europe.f-secure.com/exclude/blacklight/blbeta.exe
- RootKitRevealer by SysInternals
www.sysinternals.com/ntw2k/freeware/rootkitreveal.shtml

9. If your problem is Virus or Security patch related:
In the United States or Canada, call 1-866-PCSAFETY
MS will provide free support for those issues.

Battle Notes:
- If you have trojans (files that won't go away),
you may have to disable System Restore on XP:
http://tinyurl.com/movy

- If your Internet connectivity quits:
http://support.microsoft.com/kb/892350
http://support.microsoft.com/kb/811259
LSPFix - www.cexx.org/lspfix.htm
Winsockxpfix - www.snapfiles.com/get/winsockxpfix.html

- Install SpywareBlaster to block malware apps from
installing on your machine. Does not actively run
on your machine, you run it, it makes changes that
protect you.
http://www.javacoolsoftware.com/

- This program will not detect or remove viruses
http://www.microsoft.com/athome/security/viruses/default.mspx

*** For assistance in battling infestations***
- Get HijackThis.exe from:
http://tomcoyote.org/hjt/hjt199//HijackThis.exe
- Save it to C:\hjt (new folder)
- Open it and select "Scan and Save Log"
- Send it to Ron Kinner as an attachment
- Ron's email address is (e-mail address removed)
- Put Hijack in the subject so he knows it's not spam

Application Notes:
Registering a VB6 dll seems to fix missing agents:
1) Open up a command prompt (start -> run -> cmd)
2) Type in the following "regsvr32 msvbvm60.dll" (without the quotes).
3) Close and re-open Windows AntiSpyware
4) If that fails, install VB6 runtime files:
http://www.softwarepatch.com/windows/vbrun6download.htm

- To report false positives:
www.microsoft.com/athome/security/spyware/software/isv/fpform.aspx
- To submit disputes or requests:
www.microsoft.com/athome/security/spyware/software/isv/cdform.aspx
- To learn more about how MS analyzes suspected spyware:
www.microsoft.com/athome/security/spyware/software/isv/analysis.mspx
- To Run MSAS in passive mode:
http://support.microsoft.com/kb/892375

Alternative Anti-Spyware Applications:
- Spybot Search and Destroy
http://www.majorgeeks.com/download2471.html
- LavaSoft AdAware
http://www.majorgeeks.com/download506.html
- AdAware VX2 Cleaner Plugin
http://www.majorgeeks.com/download4283.html
- BHODemon
http://www.majorgeeks.com/download3550.html
- CWShredder (CoolWWWSearch)
http://www.majorgeeks.com/download3019.html
- PestPatrol
http://www.majorgeeks.com/download1187.html
- Webroot Spysweeper
http://www.majorgeeks.com/download3263.html
- Ewido Security Suite
http://www.ewido.net/en/
- CounterSpy (Same Giant Company Engine as MSAS)
- http://www.sunbelt-software.com

Recommended Software to help protect you:
- Windows XP Service Pack 2
http://www.microsoft.com/windowsxp/sp2/default.mspx
- SpywareBlaster
http://www.javacoolsoftware.com
- Outpost Firewall Pro
http://www.agnitum.com/products/outpost
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