Access To Browser Credential Files By Uncommon Applications
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About the rule
Rule Type
Standard
Rule Description
Detects file access requests to browser credential stores by uncommon processes. Could indicate potential attempt of credential stealing. Requires heavy baselining before usage
Severity
Attention
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND ((FILENAME endswith "\Appdata\Local\Microsoft\Windows\WebCache\WebCacheV01.dat" OR OBJECTNAME endswith "\Appdata\Local\Microsoft\Windows\WebCache\WebCacheV01.dat") OR (FILENAME endswith "\cookies.sqlite,\places.sqlite,release\key3.db,release\key4.db,release\logins.json" OR OBJECTNAME endswith "\cookies.sqlite,\places.sqlite,release\key3.db,release\key4.db,release\logins.json") OR (FILENAME contains "\User Data\Default\Login Data,\User Data\Local State" OR OBJECTNAME contains "\User Data\Default\Login Data,\User Data\Local State")) AND (PROCESSNAME != "System" AND PROCESSNAME notstartswith "C:\Program Files (x86)\,C:\Program Files\,C:\Windows\system32\,C:\Windows\SysWOW64") AND ((PROCESSNAME notstartswith "C:\ProgramData\Microsoft\Windows Defender" OR PROCESSNAME notendswith "\MpCopyAccelerator.exe,\MsMpEng.exe") AND PROCESSNAME notendswith "\thor.exe,\thor64.exe") select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113, X__Junior (Nextron Systems)
