Worm/Rbot.78462.1 - Worm

See also

Summary

Full description

Statistics

Virus:	Worm/Rbot.78462.1
Date discovered:	12/09/2006
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium
Damage Potential:	Medium
Static file:	Yes
File size:	78.462 Bytes
MD5 checksum:	711f56e46971f58b1dc98ff648e60b75
VDF version:	6.35.01.215 - Tue, 12 Sep 2006 14:00 (GMT+1)
IVDF version:	6.35.01.219 - Wed, 13 Sep 2006 11:05 (GMT+1)

General Method of propagation:
   • Local network

Aliases:
   • Kaspersky: Backdoor.Win32.SdBot.awk
   • TrendMicro: WORM_RBOT.GY
   • F-Secure: Backdoor.Win32.SdBot.awk
   • 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%\mysvcc.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]
   • "mysvcig38"="mysvcc.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
   • "mysvcig38"="mysvcc.exe"

The following registry keys are changed:

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

– [HKLM\SYSTEM\CurrentControlSet\Control\Lsa]
   Old value:
   • "restrictanonymous"=%user defined settings%
   • "restrictanonymoussam"=%user defined settings%
   New value:
   • "restrictanonymous"=dword:00000001
   • "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:
   • IPC$
   • C$
   • D$
   • ADMIN$

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

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

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)
– MS04-011 (LSASS Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)

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 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 Server:

Server: slrec.d67e9cggg.**********
Port: 18080
Channel: #sl #sl2
Nickname: USA|%six-digit random character string%
Password: ha ha

– 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
    • Information about running processes
    • Size of memory
    • Username

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • Disable DCOM
    • Disable network shares
    • disconnect from IRC server
    • Download file
    • Enable DCOM
    • Enable network shares
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform network scan
    • Restart system
    • Updates itself
    • Upload file

Miscellaneous Mutex:
It creates the following Mutex:
• mynrec

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.

See a brief description here.

Description inserted by Adriana Popa on Thu, 26 Oct 2006 12:35 (GMT+1)
Description updated by Adriana Popa on Fri, 27 Oct 2006 09:07 (GMT+1)

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