AN1634: Analytic 1634
Detects kernel- or user-space exploitation attempts targeting auditd, AV daemons, or security monitoring agents. Defender observation includes unexpected segfaults, privilege escalation attempts from low-privileged processes, or modifications to security binaries. Correlates exploitation attempts with subsequent gaps in logging or terminated processes.
Analyst context for executives and security teams
This analytic matters because it focuses on attacks against the security tooling itself on Linux systems: auditd, antivirus daemons, and monitoring agents. If these components crash, are exploited, or are modified, the organization may lose the evidence needed to detect, investigate, and prove what happened during an incident.
Executive priority
Treat this as a resilience and evidence-integrity control area. Leaders should ask whether critical Linux systems can detect and alert on failures or tampering of security agents, whether logging gaps are visible to the SOC, and whether incident responders can distinguish normal service failures from exploitation or privilege-escalation attempts. This supports operational continuity, incident decision-making, and compliance evidence where Linux audit and monitoring records are required.
Technical view
For Linux environments, validate whether the SOC can correlate three classes of events: unexpected crashes or segfaults in auditd, AV daemons, or monitoring agents; privilege-escalation attempts from low-privileged processes; and modifications to security binaries. The analytic’s value is in correlation, not a single alert: a crash or terminated process becomes more significant when followed by missing logs, disabled monitoring, or changes to security-related executables. No official detection logic is provided, so teams must implement local logic based on available Linux telemetry and normal baselines.
Likely telemetry
- Linux audit logs, including auditd service health and event continuity
- System logs showing segfaults, daemon crashes, service terminations, or restarts
- Process execution and parent-child process telemetry for low-privileged processes
- File integrity or endpoint telemetry for modifications to auditd, AV, or monitoring agent binaries
- Security agent status, heartbeat, and tamper events
Detection direction
- Baseline normal restart, update, and crash patterns for auditd, AV daemons, and monitoring agents to reduce false positives.
- Alert when security-tool crashes or segfaults correlate with privilege-escalation behavior or suspicious low-privileged process activity.
- Detect modifications to security binaries and correlate them with process termination or logging gaps.
- Monitor for host telemetry drop-off after security process failures; absence of logs may be part of the signal.
- Tune carefully around legitimate software updates, agent upgrades, kernel changes, and administrative maintenance windows.
Mitigation priorities
- Ensure Linux security services are monitored for availability, integrity, and heartbeat status.
- Implement file integrity monitoring or equivalent controls for security binaries and agent directories.
- Protect audit and monitoring configurations from unauthorized modification using least privilege and change control.
- Maintain centralized log collection so local tool failure does not erase all evidence.
- Define SOC and incident response playbooks for security-agent crashes, auditd failure, and unexplained logging gaps.
Analyst notes and limits
This is a detection analytic object for Linux. The official description identifies exploitation attempts targeting auditd, AV daemons, or security monitoring agents and emphasizes correlation with logging gaps or terminated processes. There are no supplied relationships, aliases, labels, tactics, or official detection query, so implementation should be adapted to the organization’s Linux telemetry and security tooling.
The supplied ATT&CK fields do not provide detection logic, related techniques, adversary attribution, active exploitation evidence, or coverage guarantees. Any assessment of exposure or detection effectiveness requires local telemetry validation.
Analytic 1634
Detects kernel- or user-space exploitation attempts targeting auditd, AV daemons, or security monitoring agents. Defender observation includes unexpected segfaults, privilege escalation attempts from low-privileged processes, or modifications to security binaries. Correlates exploitation attempts with subsequent gaps in logging or terminated processes.
How security teams should use this page
Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.
All related ATT&CK context
No relationships are available in the current normalized data for this object.
Object version and sync metadata
The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates .
Imported snapshots across ATT&CK releases (1)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.1 | 1.0 | Current bundle | afe24cc1647f… |
Mirrored ATT&CK source object
The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.
External references and citations
MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.
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mitre-attack AN1634Open source URL
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