AN1525: Analytic 1525
Login attempt failures over SNMP, Telnet, or SSH interface, often reflected in logs or syslog events
Analyst context for executives and security teams
AN1525 is a detection analytic for failed login attempts against network device management interfaces using SNMP, Telnet, or SSH. For leaders, the value is not the failure event alone; it is whether the organization can see and investigate management-plane access problems on routers, switches, firewalls, and similar network devices before they become an operational resilience issue.
Executive priority
Treat this as a coverage validation item for network infrastructure monitoring. Security leaders should ask whether network device authentication failures are centrally logged, retained, reviewed, and usable during incident response or audit. Repeated failures may reflect unauthorized access attempts, credential issues, misconfiguration, or administrative mistakes, so the priority is ensuring SOC and IR teams can distinguish routine noise from events that threaten network availability or control-plane integrity.
Technical view
The supplied ATT&CK object applies to Network Devices and describes login attempt failures over SNMP, Telnet, or SSH, commonly visible in device logs or syslog events. Because no official detection logic, tactic, or relationship context is provided, teams should validate the data path first: device authentication messages, syslog forwarding, timestamp quality, device identity, source address, username or community string where logged, protocol, and failure reason. Detection engineering should then tune thresholds and correlation around repeated failures by source, target device, account, protocol, and management interface exposure, while accounting for legitimate administrator mistakes and monitoring tools.
Likely telemetry
- Network device local authentication logs
- Centralized syslog events from routers, switches, firewalls, or other managed network devices
- SSH failed authentication events on network devices
- Telnet failed login events where Telnet is enabled
- SNMP authentication failure or access failure events
Detection direction
- Confirm SNMP, Telnet, and SSH authentication failure events are actually forwarded from network devices to central logging or SIEM platforms.
- Validate parsing and normalization so analysts can reliably filter by device, source, account, protocol, and failure reason.
- Tune for repeated failures, unusual sources, sensitive devices, and failures outside expected administrative patterns rather than alerting on every single failed login.
- Review false positives from mistyped administrator credentials, stale monitoring credentials, automation jobs, backup systems, and configuration management tools.
- Identify blind spots such as devices not forwarding syslog, inconsistent logging levels, unmanaged network segments, disabled authentication logging, or missing retention.
Mitigation priorities
- Prioritize management-plane visibility: enable and centralize relevant authentication failure logging on network devices.
- Restrict management access paths to approved administrative networks where feasible, especially for Telnet, SSH, and SNMP interfaces.
- Review credential and access practices for network device administration, including removal of stale accounts or credentials where applicable.
- Use the analytic as an audit and IR readiness check: confirm logs are retained long enough and contain enough context to support investigation.
- Where noisy failures are caused by legitimate tooling, update configurations or credentials rather than suppressing the evidence entirely.
Analyst notes and limits
This object is a detection analytic, not a technique description. Its practical value is as a control and telemetry validation for network device management interfaces. Since no ATT&CK relationships or official detection logic are supplied, local baselining and environment-specific tuning are required.
The supplied fields do not specify tactics, related techniques, adversary groups, procedures, impact, or a formal detection query. Conclusions are limited to failed login visibility over SNMP, Telnet, or SSH on Network Devices.
Analytic 1525
Login attempt failures over SNMP, Telnet, or SSH interface, often reflected in logs or syslog events
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 | ac351f4202b1… |
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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[1]
mitre-attack AN1525Open source URL
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