REDCap Upgrade Followed by Authentication or Hook Modification
This rule correlates the modification of 'Upgrade.php' with subsequent changes to REDCap authentication, login, or hook-related PHP files on the same device within a 30-minute window. This activity is indicative of the INFINITERED threat actor's technique to intercept the REDCap upgrade process and reinject credential harvesting, backdoor, and persistence code into new software versions. Such a sequence should be compared with approved maintenance windows and expected deployment activity to identify malicious behavior.
Microsoft Sentinel (KQL)
