W32/Sdbot-SC is an IRC backdoor Trojan with spreading capability.
When run W32/Sdbot-SC copies itself into the Windows system folder as dSAFsqs.exe and sets the following registry entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Answer Problem
dSAFsqs.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Answer Problem
dSAFsqs.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Answer Problem
dSAFsqs.exe