Elastic low stable eql
Potential Credential Access via Memory Dump File Creation
Identifies the creation or modification of a medium size memory dump file which can indicate an attempt to access credentials from a process memory.
Detection Logic
file where host.os.type == "windows" and event.type == "creation" and
/* MDMP header */
file.Ext.header_bytes : "4d444d50*" and file.size >= 30000 and
not
(
(
process.name : "System" or
process.executable : (
"?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\SysWOW64\\WerFault.exe",
"?:\\Windows\\System32\\Wermgr.exe",
"?:\\Windows\\SysWOW64\\Wermgr.exe",
"?:\\Windows\\System32\\WerFaultSecure.exe",
"?:\\Windows\\SysWOW64\\WerFaultSecure.exe",
"?:\\Windows\\System32\\WUDFHost.exe",
"C:\\Windows\\System32\\rdrleakdiag.exe",
"?:\\Windows\\System32\\Taskmgr.exe",
"?:\\Windows\\SysWOW64\\Taskmgr.exe",
"?:\\Program Files\\*.exe",
"?:\\Program Files (x86)\\*.exe",
"?:\\Windows\\SystemApps\\*.exe",
"?:\\Users\\*\\AppData\\Roaming\\Zoom\\bin\\zCrashReport64.exe",
"?:\\Windows\\CCM\\ccmdump.exe",
"?:\\$WINDOWS.~BT\\Sources\\SetupHost.exe"
) and process.code_signature.trusted == true
) or
(
file.path : (
"?:\\ProgramData\\Microsoft\\Windows\\WER\\*",
"?:\\ProgramData\\Microsoft\\WDF\\*",
"?:\\ProgramData\\Alteryx\\ErrorLogs\\*",
"?:\\ProgramData\\Goodix\\*",
"?:\\Windows\\system32\\config\\systemprofile\\AppData\\Local\\CrashDumps\\*",
"?:\\Users\\*\\AppData\\Roaming\\Zoom\\logs\\zoomcrash*",
"?:\\Users\\*\\AppData\\*\\Crashpad\\*",
"?:\\Users\\*\\AppData\\*\\crashpaddb\\*",
"?:\\Users\\*\\AppData\\*\\HungReports\\*",
"?:\\Users\\*\\AppData\\*\\CrashDumps\\*",
"?:\\Users\\*\\AppData\\*\\NativeCrashReporting\\*",
"?:\\Program Files (x86)\\*\\Crashpad\\*",
"?:\\Program Files\\*\\Crashpad\\*"
) and (process.code_signature.trusted == true or process.executable == null)
)
) Field Validations
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