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Update ATT&CK tactic list in sigma-appendix-tags.md - #221

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Daniel-Andrawis:fix/attack-tactic-list
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Daniel-Andrawis:fix/attack-tactic-list

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Fixes the ATT&CK tactic list in sigma-appendix-tags.md.

MITRE renamed TA0005, and three tactics were missing:

Tactic attack.mitre.org In the appendix
TA0005 Stealth listed as defense-evasion
TA0043 Reconnaissance missing
TA0042 Resource Development missing
TA0112 Defense Impairment missing

A rule tagged attack.defense-evasion, which is what the spec currently documents, fails validation:

issue=InvalidATTACKTagIssue severity=medium tag=attack.defense-evasion

pySigma 1.5.0 carries the current data and is correct. After this change the list matches it exactly: 15 tactics, no discrepancy in either direction.

Two things I left alone deliberately:

  • The version and release date in the header, since that seemed like a maintainer call.
  • [Lateral_Movement] on the lateral-movement line has an underscore in the display name where the others use a space. Unrelated to this fix, happy to include it if you want.

Refs #218

MITRE renamed TA0005 from Defense Evasion to Stealth, and the list was
missing Reconnaissance (TA0043), Resource Development (TA0042), and
Defense Impairment (TA0112).

A rule tagged per the published list currently fails validation, since
pySigma carries the newer ATT&CK data. After this change the list matches
pySigma 1.5.0 exactly, 15 tactics with no discrepancy in either direction.

Refs SigmaHQ#218
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nasbench changed the base branch from main to v2.2.0 September 25, 2026 20:35
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Already fixed in v2.2.0

@nasbench nasbench closed this Sep 25, 2026
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Tags appendix: ATT&CK tactic list is out of date (defense-evasion renamed, four tactics missing)

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