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ATT&CK techniqueReconnaissance

T1593 Search Open Websites/Domains

ReconnaissanceEnterprise

As of 2026-10-05, T1593 (Search Open Websites/Domains) appears in 79 tracked threats, first reported 2026-02-02 and most recently 2026-09-26, with linked actors including Scattered Spider, Scattered LAPSUS$ Hunters, ShinyHunters; it most often appears alongside T1566 (Phishing).

Tracked threats
7919 critical, 34 high, 24 medium
First seen
2026-02-02
Last seen
2026-09-26
Threat actors
35In the threats using it
Detection rules
32Blue tier and above

Data as of:

Activity timeline

T1593 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 32 reports, and 79 of the 79 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1593 Search Open Websites/Domains is catalogued by MITRE ATT&CK under the Reconnaissance tactic in the Enterprise matrix. Threadlinqs maps 79 of 2623 tracked threats (3%) to it; by severity that is 19 critical, 34 high, 24 medium.

Threats that use T1593 most often also use T1566 Phishing (48 threats), T1036 Masquerading (44 threats), T1583 Acquire Infrastructure (43 threats), T1585 Establish Accounts (42 threats), T1204 User Execution (39 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.

35 tracked threat actors appear in the threats that use T1593; the most frequent are Scattered Spider (5), Scattered LAPSUS$ Hunters (4), ShinyHunters (4), The Com (4), UNC5537 (4).

Mitigations

MITRE ATT&CK lists 2 mitigations for T1593.

Threat actors using it

Tracked threats

The 30 most recent of 79 tracked threats that use T1593.

Detection coverage

Threadlinqs maintains 32 detection rules mapped to T1593 (SPL 10, KQL 10, Sigma 12). Rule content is available to Blue tier accounts and above; this page shows counts only.

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

Sub-techniques