Worm/Akbot.22568.B - Worm

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Summary

Full description

Statistics

Virus:	Worm/Akbot.22568.B
Date discovered:	06/10/2006
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium
Damage Potential:	Medium
Static file:	Yes
File size:	22.568 Bytes
MD5 checksum:	67871e358250326e2d5abc669516dfe9
VDF version:	6.36.00.80 - Fri, 06 Oct 2006 10:16 (GMT+1)
IVDF version:	6.36.00.96 - Thu, 12 Oct 2006 12:57 (GMT+1)

General Method of propagation:
   • Local network

Aliases:
   • Kaspersky: Backdoor.Win32.Akbot.j
   • TrendMicro: BKDR_AKBOT.AS
   • F-Secure: Backdoor.Win32.Akbot.j
   • Sophos: W32/Akbot-AG

Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Blocks access to security websites
   • Drops a file
   • Registry modification
   • Steals information
   • Third party control

Files It copies itself to the following location:
• %SYSDIR%\ltssvc.dll

The following file is created:

– %TEMPDIR%\uninstall.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• "ltssvc"="rundll32.exe %SYSDIR%\ltssvc.dll,start"

Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

Exploit:
It makes use of the following Exploits:
– MS04-007 (ASN.1 Vulnerability)
–MS06-040 (Vulnerability in Server Service)

Hosts The host file is modified as explained:

– In this case existing entries are deleted.

– Access to the following domains is effectively blocked:
   • www.symantec.com; securityresponse.symantec.com; symantec.com;
      www.sophos.com; sophos.com; www.mcafee.com; mcafee.com;
      liveupdate.symantecliveupdate.com; www.viruslist.com; viruslist.com;
      viruslist.com; f-secure.com; www.f-secure.com; kaspersky.com;
      kaspersky-labs.com; www.kaspersky.com; www.networkassociates.com;
      networkassociates.com; www.ca.com; ca.com; mast.mcafee.com;
      my-etrust.com; www.my-etrust.com; download.mcafee.com;
      dispatch.mcafee.com; secure.nai.com; nai.com; www.nai.com;
      update.symantec.com; updates.symantec.com; us.mcafee.com;
      liveupdate.symantec.com; customer.symantec.com; rads.mcafee.com;
      trendmicro.com; pandasoftware.com; www.pandasoftware.com;
      www.trendmicro.com; www.grisoft.com; www.microsoft.com; microsoft.com;
      update.microsoft.com; www.virustotal.com; virustotal.com;
      www.ahnlab.com; suc.ahnlab.com; auth.ahnlab.com; ahnlab.com

The modified host file will look like this:

Backdoor Contact server:
The following:
   • http://net.phatnet.**********

As a result it may send information and remote control could be provided.

Sends information about:
    • CPU speed
    • Current user
    • Free memory
    • IP address

Remote control capabilities:
    • Launch DDoS ICMP flood
    • Launch DDoS SYN flood
    • Launch DDoS UDP flood

Miscellaneous Mutex:
It creates the following Mutex:
• lite.3

File details Programming language:
The malware program was written in MS Visual C++.

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
• Petite

See a brief description here.

Description inserted by Adriana Popa on Tue, 07 Nov 2006 12:02 (GMT+1)
Description updated by Adriana Popa on Tue, 07 Nov 2006 12:21 (GMT+1)

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