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ATT&CK techniquePersistence (ICS)Lateral Movement (ICS)

T0859 Valid Accounts

Persistence (ICS)Lateral Movement (ICS)ICS

As of 2026-10-15, T0859 (Valid Accounts) appears in 12 tracked threats, first reported 2024-12-16 and most recently 2026-10-15, with linked actors including APT44, Sandworm, Cyber Av3ngers; it most often appears alongside T1059 (Command and Scripting Interpreter).

Tracked threats
126 critical, 5 high, 1 medium
First seen
2024-12-16
Last seen
2026-10-15
Threat actors
5In the threats using it
Detection rules
21Blue tier and above

Data as of:

Activity timeline

T0859 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-10 with 5 reports, and 11 of the 12 threats were reported in the twelve months to 2026-10.

How adversaries use it

T0859 Valid Accounts is catalogued by MITRE ATT&CK under the Persistence (ICS) and Lateral Movement (ICS) tactics in the ICS matrix. Threadlinqs maps 12 of 2892 tracked threats (0.4%) to it; by severity that is 6 critical, 5 high, 1 medium.

Threats that use T0859 most often also use T1059 Command and Scripting Interpreter (8 threats), T1078 Valid Accounts (8 threats), T1190 Exploit Public-Facing Application (6 threats), T0807 Command-Line Interface (4 threats), T0819 Exploit Public-Facing Application (4 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.

5 tracked threat actors appear in the threats that use T0859; the most frequent are APT44 (2), Sandworm (2), Cyber Av3ngers (1), NoName057(16) (1), Static Tundra (1).

Threat actors using it

Tracked threats

12 tracked threats use T0859.

Detection coverage

Threadlinqs maintains 21 detection rules mapped to T0859 (SPL 7, KQL 8, Sigma 6). Rule content is available to Blue tier accounts and above; this page shows counts only.

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