Full detailed writeup for ReAL-File-System which is centered around ReFS Log Analysis.

tl;dr

• Disk Forensics
• Resilient File System
• Log Analysis

tl;dr

• Registry Hives analysis
• Analyse Chrome browser artifacts
• Analyse Slack artifacts
• Analyse AnyDesk artifacts
• Analyse artifacts for evidence of execution
• Analyse clipboard artifacts

tl;dr

Image gallery 1

• Get xss by uploading index.html in public dir
• Use bf cache to get the flag.

Image gallery 2

• Slice files.js using nginx partial caching.
• Use Subresource Integrity to load the right script
• Use DOM clobbering and Cache probing to leak the flag uuid

Full solution of Batman Investigation II - Gotham Underground Corruption from bi0sctf 2024

tl;dr

• Challenge 1 of Batman Investigation series
• Memory Forensics - WinDBG Dump Debugging - Malware Analysis - Incident Response - Threat Hunting

tl;dr

• Analysis of eBPF assembly
• Simple optimization

tl;dr

• Binary obfuscation with hidden anti-debug checks
• Linear Cryptanalysis (AES with linearly dependent SBOX)

tl;dr

• Custom hook to syscall 0x31337 using eBPF
• Check on the argument passed to syscall to verify correct/incorrect key

tl;dr

• DOM Clobbering to Redirect to another page
• Increasing Content using SQL Injection giving the same column multiple times
• Connection-Pool XS-Leaks to measure the time for the page to load
• Leak the flag character by character using the above techniques

tl;dr

• The VM takes a custom binary as input
• Binary contains function table, code and bss sections
• Code can overlap with bss and be modified at runtime
• The JIT compiler assumes that a function is safe since it ran many times
• Functions modified right before JIT bypass security checks

tl;dr

• The patch adds a vulnerable virtio device
• The device accesses pointers without bound check
• Abuse OOB pointer access to setup arb r/w primitive
• Craft open,read,write ropchain on heap
• Overwrite virtqueue handler with stack pivoting gadget