Virus:Worm/Rbot.499172
Date discovered:09/12/2005
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:499.712 Bytes
MD5 checksum:46E5CBF6377AE68557243414A28F7F11
VDF version:6.32.00.156

 General Method of propagation:
   • Local network


Aliases:
   •  Kaspersky: Backdoor.Win32.Iroffer.23b05
   •  TrendMicro: WORM_RBOT.CWQ
   •  F-Secure: W32/Sdbot.MAV
   •  Sophos: W32/Rbot-AXW
   •  Bitdefender: Backdoor.Optix.13


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


Side effects:
   • Uses its own Email engine
   • Registry modification
   • Makes use of software vulnerability
   • Steals information
   • Third party control

 Files It copies itself to the following location:
   • %SYSDIR%\%three-digit random character string%.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]
   • "Windows ASN Services"="\%three-digit random character string%.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
   • "Windows ASN Services"="\%three-digit random character string%.exe"



The following registry keys are added:

– [HKLM\SOFTWARE\Licenses]
   • "{R7C0DB872A3F777C0}"=%hex values%
   • "{K7C0DB872A3F777C0}"=%hex values%
   • "{I5D8DDAB8BD72C6E7}"=%hex values%
   • "{05D8DDAB8BD72C6E7}"=%hex values%

– [HKCR\CLSID\{22A6FF82-B3E0-94BB-5FCD-EA067B86810F}]
   • @="MSOLAPAggregation Class"

– [HKCR\CLSID\{22A6FF82-B3E0-94BB-5FCD-EA067B86810F}\InprocServer32]
   • @="%PROGRAM FILES%\Common Files\System\OLEDB~1\MSMDGD80.DLL"
   • "ThreadingModel"="both"

– [HKCR\CLSID\{22A6FF82-B3E0-94BB-5FCD-EA067B86810F}\ProgID]
   • @="MSOlapAdmin2.MSOLAPAggregation.1"

– [HKCR\CLSID\{22A6FF82-B3E0-94BB-5FCD-EA067B86810F}\
   VersionIndependentProgID]
   • @="MSOlapAdmin2.MSOLAPAggregation"



The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters]
   Old value:
   • "TrapPollTimeMilliSecs"=%user defined settings%
   New value:
   • "TrapPollTimeMilliSecs"=dword:00003a98

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

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

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

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

Server: dynamic**********.amdwebhost.com
Port: 6667
Server password: R4DRR4KZ6ZD3
Channel: #asn
Nickname: aSN-%several random digits%
Password: NdIVyk5D



– This malware has the ability to collect and send information such as:
    • CPU speed
    • Free disk space
    • Free memory
    • Information about the network
    • Information about running processes
    • Size of memory
    • 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
    • Download file
    • Enable DCOM
    • Enable network shares
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform network scan
    • Register a service
    • Send emails
    • Start spreading routine
    • Updates itself
    • Upload file
    • Visit a website

 Miscellaneous Mutex:


It creates the following Mutex:
   • rzasn1

 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:
   • Armadillo

Description inserted by Andrei Gherman on Tuesday, December 13, 2005
Description updated by Andrei Gherman on Friday, December 16, 2005

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