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OSSEC / HIDS Rule 553
- Rule family: OSSEC / HIDS
- Rule ID: 553
- Definition status: Present in current source
- Alert message / subject: File deleted. Unable to retrieve checksum.
- Rule level: 7
- Definition checked: 2026-10-21
Interpretation and response
This event is recorded as “File deleted. Unable to retrieve checksum.” Review the originating log and the affected host or service to determine whether the activity was expected.
An OSSEC/HIDS event records or correlates activity. Blocking depends on the originating application and any separately configured Active Response policy; an alert alone does not prove that an attack was blocked.
Documentation
The following guidance was migrated from the historical wiki and reviewed against the rule definition. Legacy ASL product names and interface instructions refer to the versions documented then. Use the current metadata above and your installed configuration when interpreting thresholds, notification settings and response behavior.
Rule ID
553
Status
The wiki marked this rule Active at the source revision. Current definition status is shown above.
Description
This rule detects when a monitored file has been deleted, and the system can not longer monitor it. This may be non-malicious, or may indicate that unauthorized changes have occurred on your system.
False Positives
A legitimate event may still trigger this rule. Review the surrounding activity before deciding whether it is malicious. This rule detects when a file has been deleted, and therefore the system can no longer monitor it.
If you believe that this is a false positive, please report this to our security team can determine if this is a legitimate case, or if its clever attack on your system. Instructions to report false positives are detailed on the Reporting False Positives documentation page.
Tuning Recommendations
None.
Similar Rules
Source and revision
Migrated from HIDS_553, wiki page 172, revision 1771 (20110726). Documentation review: 2026-10-21. An archived wiki status of Active is not a current deployment status.
For assistance, provide the rule ID, installed product and rule version, and a sanitized event to Atomicorp support .