Virus:Worm/RBot.173568.11
Date discovered:11/11/2005
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:173.568 Bytes
MD5 checksum:DEDCFBC617B1291BAFBE7B460C424B55
VDF version:6.32.00.111

 General Method of propagation:
   • Local network


Aliases:
   •  TrendMicro: WORM_RBOT.CPL
   •  Sophos: W32/Rbot-APC
   •  Bitdefender: Backdoor.RBot.BAR


Platforms / 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
   • Makes use of software vulnerability
   • Steals information
   • Third party control

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



It deletes the initially executed copy of itself.



The following file is created:

– %SYSDIR%\msdirectx.sys Further investigation pointed out that this file is malware, too. Detected as: TR/Spy.Agent.dg.2.B

 Registry The following registry keys are added in order to load the service after reboot:

– [HKLM\SYSTEM\CurrentControlSet\Services\msdirectx]
   • "Type"=dword:00000001
   • "Start"=dword:00000003
   • "ErrorControl"=dword:00000001
   • "ImagePath"=\??\%SYSDIR%\msdirectx.sys
   • "DisplayName"="msdirectx"

– [HKLM\SYSTEM\CurrentControlSet\Services\msdirectx\Security]
   • "Security"=%hex values%

– [HKLM\SYSTEM\CurrentControlSet\Services\msdirectx\Enum]
   • "0"="Root\\LEGACY_MSDIRECTX\\0000"
   • "Count"=dword:00000001
   • "NextInstance"=dword:00000001



The following registry keys are added:

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MSDIRECTX]
   • "NextInstance"=dword:00000001

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MSDIRECTX\0000]
   • "Service"="msdirectx"
   • "Legacy"=dword:00000001
   • "ConfigFlags"=dword:00000000
   • "Class"="LegacyDriver"
   • "ClassGUID"="{8ECC055D-047F-11D1-A537-0000F8753ED1}"
   • "DeviceDesc"="msdirectx"

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MSDIRECTX\0000\
   Control]
   • "*NewlyCreated*"=dword:00000000
   • "ActiveService"="msdirectx"



The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • "Userinit"="userinit.exe"
   New value:
   • "Userinit"="userinit.exe,xpjava.exe"

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

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

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

 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:
   • C$
   • D$
   • ADMIN$
   • IPC$


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

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



Exploit:
It makes use of the following Exploits:
– MS03-026 (Buffer Overrun in RPC Interface)
– MS03-049 (Buffer Overrun in the Workstation Service)
– MS04-007 (ASN.1 Vulnerability)
– MS04-011 (LSASS Vulnerability)


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


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


Slow down:
–It creates multiple infection threads.
– Depending on your bandwidth you might notice a fall in your network speed. As the network activity for this malware is medium you might not take notice of this if you have a broadband connection.

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

Server: g0d.d03s.**********.ex1st
Port: 8249
Server password: st4y4w4y
Channel: #.kimochi3
Nickname: Roo-San|%several random digits%
Password: kimochi



– This malware has the ability to collect and send information such as:
    • CPU speed
    • Current user
    • 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 UDP flood
    • Disable DCOM
    • Disable network shares
    • disconnect from IRC server
    • Download file
    • Enable DCOM
    • Enable network shares
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform DDoS attack
    • Perform network scan
    • Start spreading routine
    • Terminate malware
    • Terminate process
    • Updates itself
    • Visit a website

 Rootkit Technology It is a malware-specific technology. The malware hides its presence from system utilities, security applications and in the end, from the user.


Hides the following:
– Its own process

 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:
   • PE-Crypt.AntiDeb

Description inserted by Andrei Gherman on Tuesday, November 15, 2005
Description updated by Andrei Gherman on Tuesday, November 15, 2005

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