Elastic low stable eql

System Time Discovery

Detects the usage of commonly used system time discovery techniques, which attackers may use during the reconnaissance phase after compromising a system.

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Detection Logic

process where host.os.type == "windows" and event.type == "start" and
(
 (
    (process.name: "net.exe" or (process.name : "net1.exe" and not process.parent.name : "net.exe")) and 
    process.args : "time" and not process.args : "/set"
 ) or 
 (process.name: "w32tm.exe" and process.args: "/tz") or 
 (process.name: "tzutil.exe" and process.args: "/g")
) and not user.id : ("S-1-5-18", "S-1-5-19", "S-1-5-20")

Field Validations

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