Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:Worm/SdBot.64512.25
Date discovered:24/03/2006
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium to high
Damage Potential:Medium
Static file:Yes
File size:63.488 Bytes
MD5 checksum:D8A64BA6A689014C85A43402453E3394
VDF version:6.34.00.91 - Friday, March 24, 2006
IVDF version:6.34.00.91 - Friday, March 24, 2006

 General Methods of propagation:
   • Local network
    Messenger


Aliases:
   •  Symantec: W32.Spybot.Worm
   •  Kaspersky: Backdoor.Win32.SdBot.afg
   •  TrendMicro: WORM_SDBOT.DXL
   •  Sophos: W32/Sdbot-BND
   •  VirusBuster: Worm.SdBot.BWH
   •  Eset: Win32/Rbot


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


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

 Files It copies itself to the following location:
   • %SYSDIR%\hp-1003.exe



It deletes the initially executed copy of itself.

 Registry The following registry keys are added in order to run the processes after reboot:

[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   • "File Mapping Services"="hp-1003.exe"

[HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices]
   • "File Mapping Services"="hp-1003.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "File Mapping Services"="hp-1003.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices]
   • "File Mapping Services"="hp-1003.exe"



The following registry keys are added:

[HKLM\Software\Microsoft\OLE]
   • "File Mapping Services"="hp-1003.exe"

[HKLM\SYSTEM\CurrentControlSet\Control\Lsa]
   • "File Mapping Services"="hp-1003.exe"

[HKCU\Software\Microsoft\OLE]
   • "File Mapping Services"="hp-1003.exe"

[HKCU\SYSTEM\CurrentControlSet\Control\Lsa]
   • "File Mapping Services"="hp-1003.exe"

 Messenger It is spreading via Messenger. The characteristics are described below:

 AIM Messenger

 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:
   • admin$
   • Admin$\system32
   • ipc$
   • c$


Exploit:
It makes use of the following Exploits:
– MS03-026 (Buffer Overrun in RPC Interface)
– MS03-039 (Buffer Overrun in RPCSS Service)
– MS03-049 (Buffer Overrun in the Workstation Service)
– MS04-007 (ASN.1 Vulnerability)
– 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.


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


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

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

Server: backup.daw00dbhai.**********
Port: 8585
Channel: #back
Nickname: %random character string%

Server: backup.d0d0n0.**********
Port: 8585
Channel: #back
Nickname: %random character string%



 This malware has the ability to collect and send information such as:
    • CPU speed
    • Current user
     Details about drivers
    • Free disk space
    • Free memory
    • Malware uptime
    • Information about the network
    • Platform ID
    • Information about running processes
    • Size of memory
    • Username


 Furthermore it has the ability to perform actions such as:
     connect to IRC server
     Launch DDoS ICMP flood
     Launch DDoS SYN flood
    • Disable DCOM
    • Disable network shares
     disconnect from IRC server
    • Download file
    • Enable DCOM
    • Enable network shares
    • Execute file
    • Kill process
    • Open remote shell
     Perform network scan
     Start spreading routine
    • Terminate malware
     Updates itself
    • Upload file

 Stealing It tries to steal the following information:
 Recorded passwords used by the AutoComplete function

The password from the following program:
   • MSN

 Miscellaneous Mutex:
It creates the following Mutex:
   • trinkel

 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

Description inserted by Iulia Diaconescu on Friday, October 20, 2006
Description updated by Iulia Diaconescu on Tuesday, October 24, 2006

Back . . . .