W32/Rbot-ASZ is a worm and IRC backdoor Trojan for the Windows platform.
W32/Rbot-ASZ may spread to remote network shares with weak passwords or by exploiting any of the following system vulnerabilities: RPC-DCOM (MS04-012), PNP (MS05-039), ASN.1 (MS04-007).
W32/Rbot-ASZ 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/Rbot-ASZ copies itself to <System>\svch32.pif.
The following registry entries are created to run svch32.pif on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
SVCH Service
svch32.pif
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
SVCH Service
svch32.pif
HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
SVCH Service
svch32.pif
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
SVCH Service
svch32.pif
Registry entries are set as follows:
HKCU\SYSTEM\CurrentControlSet\Control\Lsa
SVCH Service
svch32.pif
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
SVCH Service
svch32.pif
HKCU\Software\Microsoft\OLE
SVCH Service
svch32.pif
HKLM\SOFTWARE\Microsoft\Ole
SVCH Service
svch32.pif