process where host.os.type == "windows" and event.type == "start" and
process.parent.name : "outlook.exe" and
not (
(
process.executable : (
"?:\\Program Files\\*",
"?:\\Program Files (x86)\\*",
"?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\SysWOW64\\WerFault.exe",
"?:\\Windows\\system32\\wermgr.exe",
"?:\\Users\\*\\AppData\\Local\\Microsoft\\Teams\\current\\Teams.exe",
"?:\\Users\\*\\AppData\\Local\\Temp\\NewOutlookInstall\\NewOutlookInstaller.exe",
"?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
"?:\\Users\\*\\AppData\\Local\\Island\\Island\\Application\\Island.exe",
"?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe",
"?:\\Users\\*\\AppData\\Roaming\\Zoom\\bin\\Zoom.exe",
"?:\\Windows\\System32\\IME\\SHARED\\IMEWDBLD.EXE",
"?:\\Windows\\System32\\spool\\drivers\\x64\\*",
"?:\\Windows\\System32\\prevhost.exe",
"?:\\Windows\\System32\\dwwin.exe",
"?:\\Windows\\System32\\mspaint.exe",
"?:\\Windows\\SysWOW64\\mspaint.exe",
"?:\\Windows\\System32\\notepad.exe",
"?:\\Windows\\SysWOW64\\notepad.exe",
"?:\\Windows\\System32\\smartscreen.exe",
"?:\\Windows\\explorer.exe",
"?:\\Windows\\splwow64.exe"
) and process.code_signature.trusted == true
) or
(
process.name : "rundll32.exe" and
process.args : "*hpmsn???.dll,MonitorPrintJobStatus*"
)
)
Install detection rules in Elastic Security
Detect Suspicious Outlook Child Process 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).