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To detect variants of the same malware family, Portable4PC constructs a Control Flow Graph of the decryptor. While the instructions may change, the underlying logic flow (loops, conditional branches) often remains constant. By comparing the graph topology against a database of known malware CFGs, Portable4PC can identify polymorphic variants of families such as Emotet or TrickBot, even if the byte signatures are entirely novel.

Portable4PC: A Comprehensive Architecture for Portable Behavioral Analysis and Static Detection of Polymorphic Code portable4pc

The proliferation of polymorphic and metamorphic malware has rendered traditional, signature-based antivirus solutions increasingly obsolete. Modern malicious code employs advanced obfuscation techniques—such as packing, encryption, and dead-code insertion—to alter its structural footprint while maintaining malicious functionality. This paper introduces , a novel, portable framework designed for the behavioral analysis and static detection of polymorphic code. By leveraging a lightweight, cross-platform emulation environment combined with structural entropy analysis and control-flow graph (CFG) isomorphism, Portable4PC identifies malicious intent without reliance on fixed signatures. This paper details the architecture of the Portable4PC system, its implementation of a "sandbox-in-a-binary" concept for portability, and evaluates its efficacy against contemporary malware datasets. To detect variants of the same malware family,

The core challenge in analyzing polymorphic code is catching the moment the code decrypts itself. Portable4PC implements an "execution breakpoint on write" mechanism. When the emulator detects a write to a memory page marked as executable (a violation of the Write-Xor-Execute principle often bypassed by malware), it sets a trap flag. When the instruction pointer (EIP/RIP) jumps to that specific address, Portable4PC pauses execution, dumps the memory region, and scans the newly "unpacked" code for known malicious opcodes or logic. Portable4PC pauses execution