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ATT&CK techniqueStealth (formerly Defense Evasion)

T1027 Obfuscated Files or Information

Stealth (formerly Defense Evasion)Enterprise

As of 2026-10-05, T1027 (Obfuscated Files or Information) appears in 1177 tracked threats, first reported 2021-11-25 and most recently 2026-10-03, with linked actors including TeamPCP, APT38, Sapphire Sleet; it most often appears alongside T1082 (System Information Discovery).

Tracked threats
1177301 critical, 758 high, 104 medium, 6 low
First seen
2021-11-25
Last seen
2026-10-03
Threat actors
198In the threats using it
Detection rules
1333Blue tier and above

Data as of:

Activity timeline

T1027 first appeared in tracked threats on and was most recently reported on . The busiest month was 2026-07 with 346 reports, and 1175 of the 1177 threats were reported in the twelve months to 2026-10.

How adversaries use it

T1027 Obfuscated Files or Information is catalogued by MITRE ATT&CK under the Stealth (formerly Defense Evasion) tactic in the Enterprise matrix. Threadlinqs maps 1177 of 2623 tracked threats (44.9%) to it; by severity that is 301 critical, 758 high, 104 medium, 6 low.

Threats that use T1027 most often also use T1082 System Information Discovery (707 threats), T1005 Data from Local System (654 threats), T1041 Exfiltration Over C2 Channel (605 threats), T1059 Command and Scripting Interpreter (593 threats), T1140 Deobfuscate/Decode Files or Information (568 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.

198 tracked threat actors appear in the threats that use T1027; the most frequent are TeamPCP (43), APT38 (33), Sapphire Sleet (28), Stardust Chollima (27), Lazarus Group (19).

Mitigations

MITRE ATT&CK lists 4 mitigations for T1027.

Data sources

Telemetry that can reveal T1027, per MITRE ATT&CK.

  • Application Log — Application Log Content
  • Command — Command Execution
  • File — File Creation, File Metadata
  • Module — Module Load
  • Process — OS API Execution, Process Creation
  • Script — Script Execution
  • WMI — WMI Creation
  • Windows Registry — Windows Registry Key Creation

Threat actors using it

Tracked threats

The 30 most recent of 1177 tracked threats that use T1027.

Detection coverage

Threadlinqs maintains 1333 detection rules mapped to T1027 (SPL 402, KQL 396, Sigma 534, other 1). Rule content is available to Blue tier accounts and above; this page shows counts only.

1333 detection rules (SPL/KQL/Sigma) · Blue and above. Compare plans

Sub-techniques