W32/Puress-B copies itself to <Windows>\system\svchost.exe and <Windows>\system\dumprep.exe.
W32/Puress-B drops the file autorun.inf which is detected as Mal/AutoInf-A.
W32/Puress-B creates the registry values
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
PHIME2002A
<Windows>\System\svchost.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
PHIME2002ASync
<Windows>\System\dumprep.exe