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ATT&CK techniqueCollection

T1185 Browser Session Hijacking

CollectionEnterprise

As of 2026-10-05, T1185 (Browser Session Hijacking) appears in 83 tracked threats, first reported 2026-02-02 and most recently 2026-10-04, with linked actors including DarkSpectre, Magecart, Periwinkle Tempest; it most often appears alongside T1027 (Obfuscated Files or Information).

Tracked threats
8313 critical, 66 high, 3 medium
First seen
2026-02-02
Last seen
2026-10-04
Threat actors
14In the threats using it
Detection rules
112Blue tier and above

Data as of:

Activity timeline

T1185 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 28 reports, and 83 of the 83 threats were reported in the twelve months to 2026-10.

How adversaries use it

T1185 Browser Session Hijacking is catalogued by MITRE ATT&CK under the Collection tactic in the Enterprise matrix. Threadlinqs maps 83 of 2623 tracked threats (3.2%) to it; by severity that is 13 critical, 66 high, 3 medium.

Threats that use T1185 most often also use T1027 Obfuscated Files or Information (55 threats), T1539 Steal Web Session Cookie (51 threats), T1036 Masquerading (43 threats), T1041 Exfiltration Over C2 Channel (40 threats), T1005 Data from Local System (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.

14 tracked threat actors appear in the threats that use T1185; the most frequent are DarkSpectre (2), Magecart (2), Periwinkle Tempest (2), APT28 (1), BlueDelta (1).

Mitigations

MITRE ATT&CK lists 2 mitigations for T1185.

Data sources

Telemetry that can reveal T1185, per MITRE ATT&CK.

  • Logon Session — Logon Session Creation
  • Process — Process Access, Process Modification

Threat actors using it

Tracked threats

The 30 most recent of 83 tracked threats that use T1185.

Detection coverage

Threadlinqs maintains 112 detection rules mapped to T1185 (SPL 35, KQL 40, Sigma 37). Rule content is available to Blue tier accounts and above; this page shows counts only.

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