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// Write-ups03 logs

Write-ups

Practical & reproducible technical work — step-by-step digital lab notes detailing CTF walkthroughs, CVE/vulnerability analysis, malware reverse engineering, and custom security tooling breakdowns.

[TARGET]
Real World
[SEVERITY]
high
[CLASS]
Malware & RE

Unpacking a custom loader without running it

Static-first analysis of a staged Windows loader — where the second stage is decrypted, how its key is derived, and what the import stubs give away.

[TOOLS]ghidrax64dbg

1 min

[TARGET]
HackerOne
[SEVERITY]
critical
[CLASS]
Vuln & CVE

An IDOR that became account takeover through OAuth

The object reference was only half of it. This follows the OAuth binding that trusted a client-supplied identifier, and the full takeover it allowed.

[TOOLS]burppython

1 min

[TARGET]
HackTheBox
[DIFFICULTY]
Easy
[CLASS]
CTF & Labs

SSRF to RCE on Sau, and why the forgery worked

How an unauthenticated request-basket service reaches an internal Maltrail instance, and why the loopback restriction never applied to it at all.

[TOOLS]nmapburpcurl

1 min

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