Packed, Printable, and Polymorphic Return-Oriented Programming

• Main Authors: LU, Kangjie, Zou, Dabi, Wen, Weiping, GAO, Debin
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2011
• Subjects: Return-oriented programming; packer; printable shellcode; polymorphic malware; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/2004; https://ink.library.smu.edu.sg/context/sis_research/article/3003/viewcontent/raid11.pdf
• Institution: Singapore Management University

Return-oriented programming (ROP) is an attack that has been shown to be able to circumvent W ⊕ X protection. However, it was not clear if ROP can be made as powerful as non-ROP malicious code in other aspects, e.g., be packed to make static analysis difficult, be printable to evade non-ASCII filtering, be polymorphic to evade signature-based detection, etc. Research in these potential advances in ROP is important in designing counter-measures. In this paper, we show that ROP code could be packed, printable, and polymorphic. We demonstrate this by proposing a packer that produces printable and polymorphic ROP code. It works on virtually any unpacked ROP code and produces packed code that is self-contained. We implement our packer and demonstrate that it works on both Windows XP and Windows 7 platforms.