W32/Unubot-A is a worm with IRC backdoor functionality for the Windows platform.
W32/Unubot-A runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.
When first run W32/Unubot-A copies itself to <System>\mdm.exe and creates the following files:
<Temp>\WER1.tmp.dir00\appcompat.txt
<Temp>\wer1.tmp
The following registry entries are created to run mdm.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Office
<System>\mdm.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Office
<System>\mdm.exe
The following registry entry is set:
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N