Home / malware Backdoor:W32/IRCBot.BNS
First posted on 18 July 2007.
Source: SecurityHomeAliases :
Backdoor:W32/IRCBot.BNS is also known as Backdoor.win32.Rbot.cmx.
Explanation :
IRCBot represents a large family of backdoors - remote access tools used by hackers.
These tools allow for the control of a victim's computer remotely by sending specific commands via IRC channels. Also, these backdoors can steal data and spread to computers vulnerable to exploits.
When the backdoor's file is started, it copies itself as a file named winupdate.exe to the Windows System folder and then creates the following startup key value in the Registry:
- [HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun]
"winupdate" = "winupdate.exe"
When the backdoor is active, it connects to an IRC server, joins a certain channel, and acts as a bot there.
The following IRC server and ports is used by the backdoor:
- 72.20.15.41:6667
The backdoor joins the following password-protected IRC channel:
- #~>|EBoT|<~
A hacker can send commands to the bots to control infected computers. Several tasks can be performed, including the following:
- Start FTP server
- Perform ping, SYN, ICMP and UDP flooding
- Get system information including OS, network and drives
- Update the backdoor's software
- Operate the backdoor's bot (nick change, join channels et cetera)
- Redirect traffic (proxy)
- Steal CD keys for popular games
- Download and execute files
- Log keystrokes
- Scan and exploit computers vulnerable to exploits
When spreading, the bot can exploit the following vulnerabilities:
- Weak Windows share passwords
- Weak VNC passwords port 5900
- ASN.1 (MS04-007) ports 80, 139, 445
- WKSSVC (MS03-049) port 135
- Symantec Antivirus and Client Security vulnerability ports 2967, 2968
Last update 18 July 2007