Assembly

Linux x64 Assembly: Syscalls, Registers, and the .bss Segment

Go behind the scenes of the Linux Kernel. Learn the register protocol for syscalls and why the .bss segment is essential for efficient, zero-disk memory reservation.

RFC 1071 Checksum Explained: x64 Assembly Implementation

A malformed packet is a dead packet. Learn how to implement the official RFC 1071 checksum algorithm in Assembly to ensure your custom ICMP data bypasses kernel drops.

Building a Low-Level ICMP Sniffer in x64 Assembly (Raw Sockets)

Scapy or C are easy, but true control lies in the CPU cycles. Learn how to build a raw socket sniffer from scratch in x64 Assembly, bypassing libc for pure kernel interaction.

ICMP Encapsulation: Bypassing DPI with Nested ICMP Type 3 Structures

Firewalls allow ICMP, but do they parse nested structures? Discover how to encapsulate protocols within ICMP Type 3 error messages to evaluate DPI resilience.

Linux Process Evasion: ptrace & prctl

Stop analysts in their tracks. Learn how to leverage PTRACE_TRACEME and PR_SET_DUMPABLE syscalls to harden your agents against debuggers and memory acquisition.