![]() As long as your defenses are solid enough you’ll hopefully catch them in an earlier or later stage. Obviously, this is potentially causing a blind spot as well, should an attacker tamper with the filtered process. To utilize the new event I would recommend enabling everything by default and only filtering some trusted processes that have the same behavior. A skilled adversary will make some attempts to cover their tracks, but of course some steps in their behavior can be observed. Unfortunately, this is certainly not directly possible in most cases and then you’ll have to rely on your (properly configured) telemetry as well as your hunting skills. However, this can be retrieved by correlating on the ProcessGuid in some cases. So building a proper baseline will be key here to filter some known noise but not cause blind spots for yourself.Ĭurrently, the new EventID 25 will not show a direct relation to the process that initiated the tampering action. To some extent replacing the initiated image is common behavior, for instance for some system processes. ![]() ![]() The configuration schema has been bumped to 4.50 to provide for the new EventID. EventID 25 is specifically tailored towards attacks like process hollowing or the whimsically named process ‘herpaderping’. However, it is not intended to be a catch-all event for all kinds of tampering events. This event covers manipulating the initial image/process to be something different than the process it was launched with. ![]() It introduces EventID 25, ProcessTampering. This new version of Sysmon adds a new detective capability to your detection arsenal.
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