Virus:Worm/Rbot.153600.2
Date discovered:15/09/2006
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:153.600 Bytes
MD5 checksum:1497c8f1e52e2d4f22ac7ed9aac1ffbe
VDF version:6.32.0.11

 General Methods of propagation:
   • Local network
   • Mapped network drives


Aliases:
   •  Symantec: W32.Spybot.Worm
   •  Kaspersky: Backdoor.Win32.SdBot.afg
   •  TrendMicro: WORM_SDBOT.BYO
   •  Sophos: W32/Rbot-ANQ
   •  VirusBuster: Worm.SdBot.BGU
   •  Eset: Win32/Rbot
   •  Bitdefender: Backdoor.SdBot.AFG


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


Side effects:
   • Lowers security settings
   • Records keystrokes
   • Registry modification
   • Makes use of software vulnerability
   • Steals information
   • Third party control

 Files It copies itself to the following location:
   • %SYSDIR%\ms-dos.pif



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
   • "MS-DOS Security Service"="ms-dos.pif"

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
   • "MS-DOS Security Service"="ms-dos.pif"

– HKCU\Software\Microsoft\Windows\CurrentVersion\Run
   • "MS-DOS Security Service"="ms-dos.pif"



The following registry keys are added:

– HKLM\SOFTWARE\Microsoft\Ole
   • "MS-DOS Security Service"="ms-dos.pif"

– HKLM\SYSTEM\CurrentControlSet\Control\Lsa
   • "MS-DOS Security Service"="ms-dos.pif"

– HKCU\SYSTEM\CurrentControlSet\Control\Lsa
   • "MS-DOS Security Service"="ms-dos.pif"

– HKLM\SOFTWARE\Microsoft\Ole
   • "MS-DOS Security Service"="ms-dos.pif"

 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:
   • IPC$
   • C$
   • ADMIN$\system32\
   • ADMIN$


Exploit:
It makes use of the following Exploits:
– MS01-059 (Unchecked Buffer in Universal Plug and Play)
– 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)


Infection process:
Creates an 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: msdos-s.secu**********
Port: 4654
Server password: gringle
Channel: #qzzp#
Nickname: %eight-digit random character string%
Password: shabby123

Server: msdos-s.secu**********
Port: 4564
Server password: gringle
Channel: #qzzp#
Nickname: %eight-digit random character string%
Password: shabby123

Server: msdos-s.upda**********
Port: 65528
Server password: gringle
Channel: #qzzp#
Nickname: %eight-digit random character string%
Password: shabby123

Server: msdos-s.upda**********
Port: 65529
Server password: gringle
Channel: #qzzp#
Nickname: %eight-digit random character string%
Password: shabby123



– This malware has the ability to collect and send information such as:
    • Cached passwords
    • CPU speed
    • Details about drivers
    • Free disk space
    • Free memory
    • Malware uptime
    • Information about the network
    • Information about running processes
    • Size of memory
    • System directory
    • Username
    • Information about the Windows operating system


– Furthermore it has the ability to perform actions such as:
    • Launch DDoS ICMP flood
    • Launch DDoS SYN flood
    • Disable DCOM
    • Disable network shares
    • Download file
    • Enable DCOM
    • Enable network shares
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform DDoS attack
    • Perform network scan
    • Start spreading routine
    • Terminate process
    • Updates itself
    • Upload file

 Miscellaneous Mutex:
It creates the following Mutex:
   • msdss

 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:
   • Obsidium

Description inserted by Irina Boldea on Tuesday, March 7, 2006
Description updated by Irina Boldea on Tuesday, March 14, 2006

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