Backdoor:Win32/IRCbot.EW is a member of Win32/IRCbot - a broad family of backdoor trojans that allows unauthorized access and control of an affected computer by a remote attacker via IRC.
When executed, Backdoor:Win32/IRCbot.EW copies itself to c:\documents and settings\administrator\local settings\temp\lsass.exe.
The malware modifies the following registry entries to ensure that its copy executes at each Windows start:
Adds value: "Windows Firewall" With data: "c:\documents and settings\administrator\local settings\temp\lsass.exe" To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Adds value: "Windows Firewall" With data: "c:\documents and settings\administrator\local settings\temp\lsass.exe" To subkey: HKCU\Software\Microsoft\windows\currentversion\run
The malware creates the following files on an affected computer:
c:\documents and settings\administrator\local settings\temp\google_cache114.tmp
Allows backdoor access and control
Backdoor:Win32/IRCbot.EW attempts to connect to an IRC server at 220.127.116.11 via TCP port 6667, join a channel and wait for commands. Using this backdoor, an attacker can perform a number of actions on an affected computer. For example, an attacker may be able to perform the following actions:
Download and execute arbitrary files
Spread to other computers using various methods of propagation
Log keystrokes or steal sensitive data
Modify system settings
Run or terminate applications
This malware description was produced and published using our automated analysis system's examination of file SHA1 ee8d329d2970979d1f9ebf4d4764ebaa6341180c.