ATT&CK · T1027.004 · sub-technique
Compile After Delivery
Tactics: stealth
About
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, csc.exe, or GCC/MinGW. Source code payloads may also be encrypted, encoded, and/or embedded within other files, such as those delivered as a Phishing. 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.
Used by actors
4 known groups
Software
6 malware/tools implement this
Corpus indicators tagged with this technique
106 indicators in the corpus carry T1027.004.
Showing the top 30 by severity of 106.