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Date discovered:23/06/2006
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:224.861 Bytes
MD5 checksum:2991ef9b80cacb49e02fa170b773dcce
VDF version:

 General Method of propagation:
   • Email
   • Local network

   •  Symantec: W32.Spybot.Worm
   •  Kaspersky:
   •  TrendMicro: WORM_RBOT.BWU
   •  Sophos: W32/Rbot-BAA
   •  Grisoft: IRC/BackDoor.SdBot.DTI
   •  VirusBuster: Worm.Rbot.BUE
   •  Eset: Win32/Rbot
   •  Bitdefender: Backdoor.Rbot.TD

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

Side effects:
   • Drops a malicious file
   • Registry modification
   • Third party control

 Files It copies itself to the following location:
   • %SYSDIR%\msreged32.exe

It deletes the initially executed copy of itself.

The following files are created:

%SYSDIR%\msdirectx.sys Used to hide a process. Detected as: TR/Spy.Agent.dg.2.B

 Registry The following registry keys are changed:

– HKLM\SYSTEM\ControlSet001\Control\Lsa
   Old value:
   • "restrictanonymoussam"=%user defined settings%
   • "restrictanonymous"=%user defined settings%
   New value:
   • "restrictanonymoussam"=dword:00000001
   • "restrictanonymous"=dword:00000001

– HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
   Old value:
   • "Shell"="Explorer.exe"
   New value:
   • "Shell"="Explorer.exe msreged32.exe"

– HKLM\SOFTWARE\Microsoft\Ole
   Old value:
   • "EnableDCOM"=%user defined settings%
   New value:
   • "EnableDCOM"="N"

 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$
   • C$
   • D$
   • IPC$

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

– A list of usernames and passwords:
   • 007; 12; 123; 1234; 2000; 2001; 2002; 2003; 2004; 12345; 123456;
      1234567; 12345678; 123456789; 1234567890; access; accounting;
      accounts; adm; admin; administrador; administrat; administrateur;
      administrator; admins; asd; backup; bill; bitch; blank; bob; brian;
      changeme; chris; cisco; compaq; computer; control; data; database;
      databasepass; databasepassword; db1; db1234; db2; dba; dbpass;
      dbpassword; default; dell; demo; domain; domainpass; domainpassword;
      eric; exchange; fred; fuck; george; god; guest; hell; hello; home;
      homeuser; hp; ian; ibm; internet; intranet; jen; joe; john; kate;
      katie; lan; lee; linux; login; loginpass; luke; mail; main; mary;
      mike; neil; nokia; none; null; oem; oeminstall; oemuser; office;
      oracle; orainstall; outlook; owner; pass; pass1234; passwd; password;
      password1; peter; pwd; qaz; qwe; qwerty; root; sa; sam; server; sex;
      siemens; slut; sql; sqlpassoainstall; staff; student; sue; susan;
      system; teacher; technical; test; unix; user; web; win2000; win2k;
      win98; windows; winnt; winpass; winxp; www; wwwadmin; xp; zxc

It makes use of the following Exploits:
– MS03-026 (Buffer Overrun in RPC Interface)
– MS04-011 (LSASS Vulnerability)

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.

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

Server: asnp**********
Port: 30108
Channel: #asnpwn
Nickname: [asnpwn] %seven-digit random character string%

– This malware has the ability to collect and send information such as:
    • Cached passwords
    • CPU speed
    • Current user
    • Details about drivers
    • Free disk space
    • Free memory
    • 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
    • Launch DDoS TCP flood
    • Launch DDoS UDP flood
    • Disable DCOM
    • Disable network shares
    • Download file
    • Edit registry
    • Enable DCOM
    • Enable network shares
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform DDoS attack
    • Perform network scan
    • Perform port redirection
    • Register a service
    • Restart system
    • Send emails
    • Start spreading routine
    • Terminate process
    • Updates itself
    • Visit a website

 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.

Description inserted by Irina Boldea on Monday, September 25, 2006
Description updated by Irina Boldea on Wednesday, October 11, 2006

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