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ATT&CK techniqueStealth (formerly Defense Evasion)

T1027.003 Steganography

Stealth (formerly Defense Evasion)EnterpriseSub-technique

As of 2026-10-05, T1027.003 (Steganography) appears in 40 tracked threats, first reported 2026-02-16 and most recently 2026-09-29, with linked actors including Cavern Manticore, TeamPCP, APT38; it most often appears alongside T1071.001 (Web Protocols).

Tracked threats
406 critical, 30 high, 4 medium
First seen
2026-02-16
Last seen
2026-09-29
Threat actors
36In the threats using it
Detection rules
89Blue tier and above

Data as of:

Activity timeline

T1027.003 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 13 reports, and 40 of the 40 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1027.003 Steganography is catalogued by MITRE ATT&CK under the Stealth (formerly Defense Evasion) tactic in the Enterprise matrix, as a sub-technique of T1027 Obfuscated Files or Information. Threadlinqs maps 40 of 2623 tracked threats (1.5%) to it; by severity that is 6 critical, 30 high, 4 medium.

Threats that use T1027.003 most often also use T1071.001 Web Protocols (29 threats), T1140 Deobfuscate/Decode Files or Information (26 threats), T1036.005 Match Legitimate Resource Name or Location (24 threats), T1082 System Information Discovery (24 threats), T1204.002 Malicious File (23 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.

36 tracked threat actors appear in the threats that use T1027.003; the most frequent are Cavern Manticore (3), TeamPCP (3), APT38 (2), Lazarus Group (2), MuddyWater (2).

Data sources

Telemetry that can reveal T1027.003, per MITRE ATT&CK.

  • File — File Metadata

Threat actors using it

Tracked threats

The 30 most recent of 40 tracked threats that use T1027.003.

Detection coverage

Threadlinqs maintains 89 detection rules mapped to T1027.003 (SPL 29, KQL 26, Sigma 34). Rule content is available to Blue tier accounts and above; this page shows counts only.

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

Parent technique

T1027 Obfuscated Files or Information — 1177 tracked threats at the technique level.