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ATT&CK techniqueCredential Access

T1555.001 Keychain

Credential AccessEnterpriseSub-technique

As of 2026-10-05, T1555.001 (Keychain) appears in 45 tracked threats, first reported 2026-02-24 and most recently 2026-10-02, with linked actors including APT38, ClickLock Dev, Sapphire Sleet; it most often appears alongside T1005 (Data from Local System).

Tracked threats
455 critical, 38 high, 2 medium
First seen
2026-02-24
Last seen
2026-10-02
Threat actors
13In the threats using it
Detection rules
100Blue tier and above

Data as of:

Activity timeline

T1555.001 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 14 reports, and 45 of the 45 threats were reported in the twelve months to 2026-10.

How adversaries use it

T1555.001 Keychain is catalogued by MITRE ATT&CK under the Credential Access tactic in the Enterprise matrix, as a sub-technique of T1555 Credentials from Password Stores. Threadlinqs maps 45 of 2623 tracked threats (1.7%) to it; by severity that is 5 critical, 38 high, 2 medium.

Threats that use T1555.001 most often also use T1005 Data from Local System (40 threats), T1555.003 Credentials from Web Browsers (37 threats), T1059.004 Unix Shell (36 threats), T1082 System Information Discovery (36 threats), T1071.001 Web Protocols (34 threats). These are the techniques an intrusion set tends to chain with it, so they are the natural next places to look when it is observed.

13 tracked threat actors appear in the threats that use T1555.001; the most frequent are APT38 (3), ClickLock Dev (2), Sapphire Sleet (2), Stardust Chollima (2), AMOS Operators (1).

Mitigations

MITRE ATT&CK lists 1 mitigation for T1555.001.

Data sources

Telemetry that can reveal T1555.001, per MITRE ATT&CK.

  • Command — Command Execution
  • File — File Access
  • Process — OS API Execution, Process Creation

Threat actors using it

Tracked threats

The 30 most recent of 45 tracked threats that use T1555.001.

Detection coverage

Threadlinqs maintains 100 detection rules mapped to T1555.001 (SPL 34, KQL 40, Sigma 26). Rule content is available to Blue tier accounts and above; this page shows counts only.

100 detection rules (SPL/KQL/Sigma) · Blue and above. Compare plans

Parent technique

T1555 Credentials from Password Stores — 445 tracked threats at the technique level.