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Home/ATT&CK/T1027/T1027.004
MITRE ATT&CK Sub-Technique

T1027.004: Compile After Delivery

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Adversaries may attempt to make payloads difficult to discover and analyze by delivering files to victims as uncompiled code. Text-based source code files may subvert analysis and scrutiny from protections targeting executables/binaries. These payloads will need to be compiled before execution; typically via native utilities such as ilasm.exe(Citation: ATTACK IQ), csc.exe, or GCC/MinGW.(Citation: ClearSky MuddyWater Nov 2018) Source code payloads may also be encrypted, encoded, and/or embedded within other files, such as those delivered as a [Phishing](https://attack.mitre.org/techniques/T1566). Payloads may also be delivered in formats unrecognizable and inherently benign to the native OS (ex: EXEs on macOS/Linux) before later being (re)compiled into a proper executable binary with a bundled compiler and execution framework.(Citation: TrendMicro WindowsAppMac)

Tactics
Stealth
Platforms
Linux, macOS, Windows

▪Parent technique

T1027: Obfuscated Files or Information

▪Used by groups (4)

G0047Gamaredon GroupG0069MuddyWaterG0106RockeG1041Sea Turtle

▪Software using this technique (6)

S0348Cardinal RATmalwareS0385njRATmalwareS0633SlivertoolS0661FoggyWebmalwareS0673DarkWatchmanmalwareS1099Samuraimalware

▪Reference

T1027.004on MITRE ATT&CK

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.