Worm/Rbot.96768.12 - Worm

See also

Summary

Full description

Statistics

Virus:	Worm/Rbot.96768.12
Date discovered:	23/05/2005
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium
Damage Potential:	Medium
Static file:	Yes
File size:	96.768 Bytes
MD5 checksum:	1cf27193818159e647bef27f02268eea
VDF version:	6.31.01.166 - Tue, 23 Aug 2005 16:52 (GMT+1)

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

Aliases:
   • TrendMicro: WORM_RBOT.ERW
   • Sophos: W32/Rbot-BAH
   • Grisoft: IRC/BackDoor.SdBot.HLZ
   • VirusBuster: Worm.RBot.CFY
   • Eset: Win32/Rbot
   • Bitdefender: Backdoor.RBot.WDC

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

Side effects:
   • Registry modification
   • Makes use of software vulnerability
   • Third party control

Files It copies itself to the following location:
• %SYSDIR%\scvhost9.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
   • "Generic Host Process9 System Backup"="scvhost9.exe"

– HKCU\Software\Microsoft\Windows\CurrentVersion\Run
   • "Generic Host Process9 System Backup"="scvhost9.exe"

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

– HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
   • "Generic Host Process9 System Backup"="scvhost9.exe"

The following registry keys are changed:

– HKLM\SOFTWARE\Microsoft\Ole
   Old value:
   • "EnableDCOM"="Y"
   New value:
   • "EnableDCOM"="N"

– HKLM\SYSTEM\CurrentControlSet\Control\Lsa
   Old value:
   • "restrictanonymous"=0
   New value:
   • "restrictanonymous"=1

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$

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)
– MS04-011 (LSASS Vulnerability)

Infection process:
Creates a TFTP 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: power.pro**********
Port: 3267
Channel: #Bït[r2]Nåt
Nickname: {XP}-%seven-digit random character string%
Password: FIRE

– This malware has the ability to collect and send information such as:
    • Cached passwords
    • Capture screen
    • Capture shot from webcam
    • CPU speed
    • Current user
    • Free disk space
    • Free memory
    • Malware uptime
    • 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:
    • connect to IRC server
    • Launch DDoS ICMP flood
    • Launch DDoS SYN flood
    • Launch DDoS TCP flood
    • Launch DDoS UDP flood
    • Disable DCOM
    • Disable network shares
    • disconnect from IRC server
    • 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
    • Restart system
    • Send emails
    • Start keylog
    • Start spreading routine
    • Terminate process
    • Updates itself
    • Upload file
    • Visit a website

Miscellaneous Mutex:
It creates the following Mutex:
• Bot-1

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 Irina Boldea on Thu, 23 Nov 2006 14:25 (GMT+1)
Description updated by Irina Boldea on Thu, 23 Nov 2006 15:13 (GMT+1)

» About Malware
» About Phishing
» Viruses In the Wild

« back