Worm/Deborm.Q.1 - Worm

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Summary

Full description

Statistics

Virus:	Worm/Deborm.Q.1
Date discovered:	08/08/2005
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	56.320 Bytes
MD5 checksum:	82d72bbfbfbf98a60ebc2232e201b6d9
VDF version:	6.19.0.13

General Method of propagation:
   • Local network

Aliases:
   • Symantec: W32.HLLW.Nebiwo
   • Mcafee: W32/Deborm.worm
   • Kaspersky: W32/Deborm.Q
   • TrendMicro: WORM_DEBORM.Q
   • F-Secure: W32/Deborm.Q
   • Sophos: W32/Deborm-Q
   • Panda: W32/Deborm.Q
   • Grisoft: TrojanDropper.Newbiwo
   • VirusBuster: Worm.Win32.Deborm.Q1
   • Bitdefender: Win32.Worm.Deborm.A

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

Files The following files are created:

– %TEMPDIR%\~%two-digit random character string%.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: BDS/Deborm.Q.3

– %TEMPDIR%\~%two-digit random character string%.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: BDS/Deborm.R.3

Registry The following registry key is continuously in an infinite loop added in order to run the process after reboot.

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• "NAV Live Update"="%malware execution directory%\%executed file%"

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

It drops copies of itself to the following network shares:
   • %WINDIR%\Profiles\All Users\Start Menu\Programs\Startup
   • c:\windows\Start Menu\Programs\Startup
   • %ALLUSERSPROFILE%\Start Menu\Programs\Startup
   • \WINNT\Profiles\All Users\Start Menu\Programs\Startup
   • \WINDOWS\Start Menu\Programs\Startup
   • \Documents and Settings\All Users\Start Menu\Programs\Startup

It uses the following login information in order to gain access to the remote machine:

– The following list of usernames:
   • Administrator
   • Guest
   • Owner

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

IP address generation:
It creates random IP addresses while it keeps the first two octets from its own address. Afterwards it tries to establish a connection with the created addresses.

Slow down:
– It creates the following number of infection threads: 100
– Depending on your bandwidth you might determine a fall in your network speed. As the network activity for this malware is high you might notice it even if you have a broadband connection.
– Due to the multiple network threads created, an infected computer turns into a slow and barely usable machine.

Remote execution:
–It attempts to schedule a remote execution of the malware, on the newly infected machine. Therefore it uses the NetScheduleJobAdd function.

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 a runtime packer.

See a brief description here.

Description inserted by Victor Tone on Mon, 08 Aug 2005 16:42 (GMT+1)
Description updated by Oliver Auerbach on Fri, 26 Aug 2005 01:22 (GMT+1)

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