Elastic Defend high stable eql
Sensitive File Access - Unattended Panther
Identifies an unusual process accessing Windows Panther Installation files. Adversaries may search local file systems and remote file shares for files containing insecurely stored credentials.
Detection Logic
sequence by process.entity_id with maxspan=1m
[process where event.action == "start" and
user.id : ("S-1-5-21*", "S-1-12-*") and process.executable != null and
process.hash.sha256 != "3e5bf6e2ac8ee4c7ccc60f51e5c4038ccf95b99f43f793b33b471681816a1d6b" and
not process.executable :
(
/* third party programs common install path - requires local admin */
"?:\\Program Files\\*",
"?:\\Program Files (x86)\\*",
/*
dllhost.exe (IFileOperation like view/changing security permission of a file/folder).
explorer.exe for directory and file discovery.
SearchProtocolHost.exe is for file searches and indexing.
*/
"?:\\Windows\\explorer.exe",
"?:\\Windows\\System32\\dllhost.exe",
"?:\\Windows\\System32\\SearchProtocolHost.exe",
/* Windows Defender */
"?:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\*.exe",
"?:\\Program Files\\Microsoft Monitoring Agent\\Agent\\*.exe",
"?:\\Program Files\\Windows Defender Advanced Threat Protection\\*.exe",
"?:\\Windows\\System32\\notepad.exe",
"?:\\Windows\\System32\\Robocopy.exe",
"?:\\Windows\\System32\\cmd.exe",
"?:\\Windows\\System32\\xcopy.exe",
"?:\\Windows\\System32\\SystemSettingsAdminFlows.exe",
"?:\\Windows\\System32\\smartscreen.exe",
"?:\\Windows\\System32\\Sysprep\\sysprep.exe",
"?:\\WINDOWS\\OEM\\FieryLocaleSetup.exe",
"?:\\Windows\\System32\\pnputil.exe",
"?:\\Windows\\System32\\ResetEngine.exe")]
[file where event.type == "access" and
/* non system accounts */
user.id : ("S-1-5-21*", "S-1-12-*") and
file.path : ("?:\\Windows\\Panther\\Unattend.xml",
"?:\\Windows\\Panther\\Unattended.xml",
"?:\\Windows\\Panther\\Unattend\\Unattended.xml",
"?:\\Windows\\Panther\\Unattend\\Unattend.xml",
"?:\\Windows\\System32\\Sysprep\\unattend.xml",
"?:\\Windows\\System32\\Sysprep\\Panther\\unattend.xml")] Field Validations
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