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OSSEC / HIDS Rule 61028

Rule family: OSSEC / HIDS
Rule ID: 61028
Definition status: Present in current source
Alert message / subject: Denied an untrusted non system library binary from hooking an application.
Rule level: 7
Definition checked: 2026-10-21

Interpretation and response

This event is recorded as “Denied an untrusted non system library binary from hooking an application.” 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.

Description

This rule is triggered when a userland application tries to hook a system library or application, but is not itself a system library or application.

You should investigate this event as it may be part of a broader attack. Some debugging application, such as abrtd, are known to do this.

Log examples

Illustrative event summary (not a captured log): OSSEC/HIDS 61028 — Denied an untrusted non system library binary from hooking an application..

Troubleshooting

False Positives

Please do not report events for abrt, if this involves a different application, please report this to support if you know this is not an attack.

Source and revision

Migrated from HIDS_61028, wiki page 529, revision 5224 (20141016). 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 .