A low-level account created later can suddenly "wake up" with Administrative or Domain Admin rights if those rights were pre-injected into the synthetic SID.
Once a new user or group is created and assigned that specific SID, they automatically inherit all the "synthetic" permissions previously injected, often without appearing in standard audit logs as a new permission grant. Why This Matters A low-level account created later can suddenly "wake
The vulnerability relies on the way Windows handles SID resolution. Because the system allows adding SIDs that aren't yet mapped to a user, the ACL essentially waits for its "missing half". Because the system allows adding SIDs that aren't
These synthetic entries often appear as "Account Unknown" or long strings of numbers in the security tab, which administrators frequently ignore as remnants of deleted accounts rather than active threats. A low-level account created later can suddenly "wake
For more detailed technical analysis, you can view the original research on the Varonis Blog .