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ATT&CK techniqueDiscovery

T1217 Browser Information Discovery

DiscoveryEnterprise

As of 2026-10-05, T1217 (Browser Information Discovery) appears in 68 tracked threats, first reported 2026-02-12 and most recently 2026-09-29, with linked actors including APT38, Lazarus Group, Contagious Interview; it most often appears alongside T1005 (Data from Local System).

Tracked threats
6812 critical, 50 high, 6 medium
First seen
2026-02-12
Last seen
2026-09-29
Threat actors
21In the threats using it
Detection rules
50Blue tier and above

Data as of:

Activity timeline

T1217 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 22 reports, and 68 of the 68 threats were reported in the twelve months to 2026-09.

How adversaries use it

T1217 Browser Information Discovery is catalogued by MITRE ATT&CK under the Discovery tactic in the Enterprise matrix. Threadlinqs maps 68 of 2623 tracked threats (2.6%) to it; by severity that is 12 critical, 50 high, 6 medium.

Threats that use T1217 most often also use T1005 Data from Local System (57 threats), T1027 Obfuscated Files or Information (48 threats), T1082 System Information Discovery (48 threats), T1539 Steal Web Session Cookie (45 threats), T1041 Exfiltration Over C2 Channel (44 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.

21 tracked threat actors appear in the threats that use T1217; the most frequent are APT38 (6), Lazarus Group (5), Contagious Interview (4), Sapphire Sleet (4), Stardust Chollima (4).

Data sources

Telemetry that can reveal T1217, per MITRE ATT&CK.

  • Command — Command Execution
  • File — File Access
  • Process — Process Creation

Threat actors using it

Tracked threats

The 30 most recent of 68 tracked threats that use T1217.

Detection coverage

Threadlinqs maintains 50 detection rules mapped to T1217 (SPL 13, KQL 25, Sigma 12). Rule content is available to Blue tier accounts and above; this page shows counts only.

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