/* userinit followed by explorer followed by early child process of explorer (unlikely to be launched interactively) within 1m */
sequence by host.id, user.name with maxspan=1m
[process where host.os.type == "windows" and event.type == "start" and process.name : "userinit.exe" and process.parent.name : "winlogon.exe"]
[process where host.os.type == "windows" and event.type == "start" and process.name : "explorer.exe"]
[process where host.os.type == "windows" and event.type == "start" and process.parent.name : "explorer.exe" and
/* add suspicious programs here */
process.pe.original_file_name in ("cscript.exe",
"wscript.exe",
"PowerShell.EXE",
"MSHTA.EXE",
"RUNDLL32.EXE",
"REGSVR32.EXE",
"RegAsm.exe",
"MSBuild.exe",
"InstallUtil.exe") and
/* add potential suspicious paths here */
process.args : ("C:\\Users\\*", "C:\\ProgramData\\*", "C:\\Windows\\Temp\\*", "C:\\Windows\\Tasks\\*", "C:\\PerfLogs\\*", "C:\\Intel\\*")
]
Install detection rules in Elastic Security
Detect Execution of Persistent Suspicious Program in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).