HTB — MonitorsFour | Writeup
The article discusses a writeup on the HackTheBox challenge 'MonitorsFour', which is a Windows-based box with a hidden attack surface. It details the steps taken to exploit a logic flaw in an API that leads to credential leakage and remote code execution. The writeup emphasizes the importance of testing various falsy values in identification parameters to uncover vulnerabilities.
- ▪MonitorsFour is a Windows box that conceals its attack surface behind a PHP web application and containerized infrastructure.
- ▪The exploitation process involves a logic flaw in an API that leaks user credentials, leading to remote code execution.
- ▪The writeup highlights the dangers of unsalted MD5 hashes, which can be cracked quickly using modern GPUs.
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Story provenance
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Record
| Original publisher | DEV.to (Top) |
| Canonical URL | https://dev.to/whyshell/htb-monitorsfour-writeup-381k |
| Publication time | Mon, 25 May 2026 18:15:21 +0000 |
| Retrieval time | 2026-05-25T18:37:40.017Z |
| Last seen | 2026-05-25T18:37:40.017Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | Vv0UrfE80pAm · 2 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3951209) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } WhyShell Posted on May 25 HTB — MonitorsFour | Writeup #hackthebox #ctf #security #writeup 🇫🇷 Version française Platform: HackTheBox | Difficulty: Easy | OS: Windows (Docker Desktop / WSL2) Machine: HTB — MonitorsFour Chain: IDOR → Hash cracking → Cacti RCE → Docker escape Overview MonitorsFour is a Windows box that hides almost its entire attack surface behind a PHP web application and a containerized infrastructure.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at DEV.to (Top).