TACTIC: DEFENSE EVASION

Obfuscated Files or Information (T1027): Real Cases

MITRE Definition ↗
Adversaries encrypt or encode payload strings and executable code to conceal malicious contents.

Key Facts

Technique ID
T1027
Defense Evasion
Mapped Cases
3
Primary sources
Related Laws
3
Criminal statutes
  • ATT&CK Technique Identifier: T1027.
  • Tactical Phase: Defense Evasion.
  • Substantiated in 3 primary court prosecution and advisory cases.
  • Linked records cite judicial dockets, plea agreements, or federal advisories.

Verified Evidentiary Case Records (3)

Sophisticated software supply chain compromise by the Russian Foreign Intelligence Service (SVR), inserting the SUNBURST backdoor into updates of SolarWinds Orion software and compromising multiple federal agencies.

Kill-Chain Phase: Evasion & Dormancy (Two-Week Dormancy and Host Environment Inspection)

Once installed on customer networks, the SUNBURST backdoor stayed completely inert for up to two weeks, verifying that no analysis tools or security agents were actively debugging the process before activating.

U.S. District Court for the Southern District of New York · SEC CIK 0001739942 View full case dossier →

Department of Justice charges North Korean state-sponsored programmer with the 2014 Sony Pictures hack, the 2017 global WannaCry ransomware outbreak, and the $81 million Bangladesh Bank cyber heist.

Primary Source Evidence Excerpt: Criminal Complaint ¶ 63, Page 42
"Park and his co-conspirators heavily obfuscated WannaCry and Destover binaries with custom XOR encoders and commercial packers."
U.S. District Court for the Central District of California · 2:18-mj-01479 View full case dossier →

Sophisticated multi-year social engineering and software supply chain operation where persona Jia Tan gained co-maintainer status on the foundational open-source xz compression project, embedding a multi-stage obfuscated backdoor into liblzma tarballs that hijacked OpenSSH sshd authentication to enable unauthorized pre-auth remote code execution.

Kill-Chain Phase: Obfuscated Staging (Malicious Test File Injection)

Attacker committed disguised binary test files containing extractable payload segments into the repository under the guise of compression test cases.

Cybersecurity and Infrastructure Security Agency Alert · CVE-2024-3094 View full case dossier →

Commonly Charged Criminal Statutes