HTML Smuggling (T1027.006)

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In Playbook

Associated Tactics

  • Defense Evasion

Defense Evasion (TA0005)

The adversary is trying to avoid being detected. Defense Evasion consists of techniques that adversaries use to avoid detection throughout their compromise. Techniques used for defense evasion include uninstalling/disabling security software or obfuscating/encrypting data and scripts. Adversaries also leverage and abuse trusted processes to hide and masquerade their malware. Other tactics’ techniques are cross-listed here when those techniques include the added benefit of subverting defenses.

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Procedure Examples

Description Source(s)
Hegt, S. (2018, August 14). HTML smuggling explained. Retrieved May 20, 2021. Outlflank HTML Smuggling 2018
Microsoft Threat Intelligence Center (MSTIC). (2021, May 27). New sophisticated email-based attack from NOBELIUM. Retrieved May 28, 2021. MSTIC NOBELIUM May 2021
Subramanian, K. (2020, August 18). New HTML Smuggling Attack Alert: Duri. Retrieved May 20, 2021. HTML Smuggling Menlo Security 2020
Warren, R. (2017, August 8). Smuggling HTA files in Internet Explorer/Edge. Retrieved September 12, 2024. nccgroup Smuggling HTA 2017