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Zapchast.PF is a Trojan. A Trojan is a program that pretends to have a valid use, but in fact modifies the user's computer in malicious way. Trojans do not replicate or spread to other computers.

File Related Changes
It drops the following file(s) on the system:
  • "c:\Windows\Temp\spoolsv\run.bat"
  • "c:\Windows\Temp\spoolsv\spoolsv.exe"

    Process Related Changes
    It creates the following process(es):
    • C:\Windows\system32\cmd.exe [ cmd /c \C:\Windows\temp\spoolsv\run.bat ]
    • C:\Windows\System32\rundll32.exe
    • C:\Windows\temp\spoolsv\spoolsv.exe

    Network Activity
    It attempts to connect to the following remote servers:
    • EU.UnderNet.Org:6667 (91.236xxxxxx)

    We observed the following DNS query/queries:
    • Lelystad.NL.EU.UnderNet.Org

    Registry Related Changes
    It makes the following registry modifications to ensure infection after system reboot:
    • HKLM\Software\Microsoft\Windows\CurrentVersion\Run\spoolsv = C:\Windows\temp\spoolsv\spoolsv.exe

    Relevant Information