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ATT&CK techniqueCredential Access

T1621 Multi-Factor Authentication Request Generation

Credential AccessEnterprise

As of 2026-10-05, T1621 (Multi-Factor Authentication Request Generation) appears in 62 tracked threats, first reported 2026-02-02 and most recently 2026-09-30, with linked actors including Scattered Spider, ShinyHunters, The Com; it most often appears alongside T1566 (Phishing).

Tracked threats
624 critical, 45 high, 12 medium, 1 low
First seen
2026-02-02
Last seen
2026-09-30
Threat actors
28In the threats using it
Detection rules
96Blue tier and above

Data as of:

Activity timeline

T1621 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 30 reports, and 62 of the 62 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1621 Multi-Factor Authentication Request Generation is catalogued by MITRE ATT&CK under the Credential Access tactic in the Enterprise matrix. Threadlinqs maps 62 of 2623 tracked threats (2.4%) to it; by severity that is 4 critical, 45 high, 12 medium, 1 low.

Threats that use T1621 most often also use T1566 Phishing (36 threats), T1078 Valid Accounts (34 threats), T1589 Gather Victim Identity Information (32 threats), T1567 Exfiltration Over Web Service (31 threats), T1539 Steal Web Session Cookie (29 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.

28 tracked threat actors appear in the threats that use T1621; the most frequent are Scattered Spider (11), ShinyHunters (9), The Com (7), Scattered LAPSUS$ Hunters (5), UNC6040 (5).

Mitigations

MITRE ATT&CK lists 3 mitigations for T1621.

Data sources

Telemetry that can reveal T1621, per MITRE ATT&CK.

  • Application Log — Application Log Content
  • Logon Session — Logon Session Creation, Logon Session Metadata
  • User Account — User Account Authentication

Threat actors using it

Tracked threats

The 30 most recent of 62 tracked threats that use T1621.

Detection coverage

Threadlinqs maintains 96 detection rules mapped to T1621 (SPL 31, KQL 35, Sigma 30). Rule content is available to Blue tier accounts and above; this page shows counts only.

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