Techniques
Sample rules
Windows Unusual Intelliform Storage Registry Access
- source: splunk
- technicques:
- T1552.001
Description
The following analytic identifies processes accessing Intelliform Storage Registry keys used by Internet Explorer. It leverages Windows Security Event logs, specifically monitoring EventCode 4663, which tracks object access events. This activity is significant because it can indicate unauthorized access or manipulation of sensitive registry keys used for storing form data in Internet Explorer. If confirmed malicious, this could lead to data exfiltration, credential theft, or further compromise of the system.
Detection logic
`wineventlog_security` EventCode=4663 NOT (ProcessName IN("C:\\Program Files\\Internet Explorer\\iexplore.exe", "C:\\Windows\\System32\\dllhost.exe", "C:\\Windows\\SysWow64\\dllhost.exe")) ObjectName IN ("*Software\\microsoft\\Internet Explorer\\Intelliforms\\storage2*")
| stats count min(_time) as firstTime max(_time) as lastTime by ObjectName ObjectType ProcessName AccessMask process_id EventCode Computer Caller_User_Name
| rename Computer as dest Caller_User_Name as user ProcessName as process_name
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_unusual_intelliform_storage_registry_access_filter`
Windows Unusual FileZilla XML Config Access
- source: splunk
- technicques:
- T1552.001
Description
The following analytic identifies processes accessing FileZilla XML config files such as recentservers.xml and sitemanager.xml. It leverages Windows Security Event logs, specifically monitoring EventCode 4663, which tracks object access events. This activity is significant because it can indicate unauthorized access or manipulation of sensitive configuration files used by FileZilla, a popular FTP client. If confirmed malicious, this could lead to data exfiltration, credential theft, or further compromise of the system.
Detection logic
`wineventlog_security` EventCode=4663 NOT (ProcessName IN("C:\\Program Files\\FileZilla FTP Client\\filezilla.exe", "C:\Program Files (x86)\\FileZilla FTP Client\\filezilla.exe", "C:\\Program Files\\Microsoft OneDrive\\OneDrive.exe", "C:\\Program Files (x86)\\Microsoft OneDrive\\OneDrive.exe")) file_path IN ("*FileZilla\\recentservers.xml*", "*FileZilla\\sitemanager.xml*")
| stats count min(_time) as firstTime max(_time) as lastTime by ObjectName ObjectType ProcessName AccessMask process_id EventCode Computer Caller_User_Name
| rename Computer as dest Caller_User_Name as user ProcessName as process_name
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_unusual_filezilla_xml_config_access_filter`