Worm/Bozori.F - Worm

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Summary

Full description

Statistics

Virus:	Worm/Bozori.F
Date discovered:	04/10/2005
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium
Damage Potential:	Medium
Static file:	Yes
File size:	19.968 Bytes
MD5 checksum:	1067520f225d7429e0edba491e4b6db5
VDF version:	6.31.1.212

General Method of propagation:
   • Local network

Aliases:
   • Mcafee: W32/Bozori.worm.f
   • Kaspersky: Net-Worm.Win32.Bozori.f
   • TrendMicro: WORM_ZOTOB.P
   • Bitdefender: Win32.Worm.Zotob.N

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Registry modification
   • Makes use of software vulnerability
   • Third party control

Files It copies itself to the following location:
• %SYSDIR%\winwsl.exe

It deletes the initially executed copy of itself.

The following file is created:

– A file that is for temporary use and it might be deleted afterwards:
• %TEMPDIR%\%random character string%.bat

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• "winwsl.exe"="winwsl.exe"

Network Infection Exploit:
It makes use of the following Exploit:
– MS05-039 (Vulnerability in Plug and Play)

IP address generation:
It creates random IP addresses and tries to establish a connection with them.

Infection process:
Creates a TFTP script on the compromised machine in order to download the malware to the remote location.

IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: 66.252.12.254
Port: 6664
Channel: #vnd
Nickname: %random character string%

Process termination List of processes that are terminated:
   • botzor.exe; csm.exe; HPSV.exe; llsrv.exe; mousebm.exe; per.exe;
      pnpsrv.exe; service32.exe; ssl.exe; svnlitup32.exe; system32.exe;
      upnp.exe; winbnl.exe; winksl.exe; winpnp.exe; winrvl.exe; wintbp.exe;
      wintbpx.exe; wintnl.exe; wintnpx.exe; wpa.exe

Miscellaneous Mutex:
It creates the following Mutex:
• winwsl.exe

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:
• UPX

See a brief description here.

Description inserted by Iulia Diaconescu on Thu, 06 Oct 2005 12:13 (GMT+1)
Description updated by Iulia Diaconescu on Tue, 11 Oct 2005 09:42 (GMT+1)

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