Ethan-Andrews/Exploitarium-Detections: Sentinel and Defender KQL Rules for Bikini Exploits

KQL detection rules for Microsoft Sentinel and Defender XDR covering the bikini/exploitarium anonymous disclosure — a personal research archive of 15+ distinct vulnerability targets across 109+ tracked files, released without vendor notification on June 23, 2026.

54 rules | 23 product folders | KQL | Author: Ethan Andrews (@eandrews)

Last Updated: 7/1/2026

Intel report: https://systemtwosecurity.com/share/inspiration/VNJMKFVM

Background

An anonymous researcher known as 'bikini' released exploitarium, a GitHub repo containing proof-of-concept research across 15+ distinct vulnerability targets (109+ tracked files across 15+ folders). The repo is actively updated — new entries are being added as the researcher continues publishing work.

Scope clarification: The repo contains 15 distinct vulnerability research targets. File counts per folder reflect individual files (scripts, payloads, helpers, READMEs) — not distinct CVEs. The researcher's README notes these were unreported at time of posting and explicitly invites others to file CVEs.

The most technically significant findings — libssh2 pre-auth heap write and Gitea default Docker auth bypass — have been independently verified as high-risk with active exploitation observed. Some entries have been dismissed by the community as low-impact noise.

Exploitarium Folder Breakdown

Repository Structure

Exploitarium-Detections/
├── 7zip/                 # MOTW bypass x3 (rules 02, 27, 28)
├── anydesk/              # COM hijack DLL, named pipe, PE fingerprint recon (rules 06, 17, 36)
├── c-ares/               # TCP UAF NDR sequence, linkage recon, DNS failure spike (rules 07, 08, 41)
├── curl/                 # SMTP CRLF injection attempt + PoC artifact (rules 45, 46)
├── docker/               # Privileged container host mount shell spawn (rule 38)
├── exploitarium-generic/ # calc.exe PoC generic, multi-CVE sweep (rules 22, 44)
├── ffmpeg/               # (reserved)
├── firefox/              # SmartWindow silent enablement (rule 09)
├── flowise/              # Unauthorized API access (rule 37)
├── ghidra/               # Headless analyzer suspicious script execution (rule 40)
├── imagemagick/          # Policy bypass delegate execution (rule 39)
├── libarchive/           # ZIP debuginfod size boundary bypass x2 (rules 51, 52)
├── libssh2/              # Pre-auth RCE, DoS x2, scaffold x2, heap corruption, recon (rules 01, 12, 13, 24, 25, 26, 35)
├── lunar-client/         # Electron IPC preload, Modrinth gameDirectory abuse (rules 15, 16)
├── mybb/                 # ACP privilege escalation x2 (rules 05, 21)
├── nextjs/               # unstable_cache PoC execution, cache object collision (rules 49, 50)
├── nmap/                 # IPv6 ExtLen wrap PoC (rule 18)
├── nodebb/               # ActivityPub UID spoof x2 (rules 47, 48)
├── openvpn/              # PAC injection, echo script ACE, DHCP option injection (rules 14, 42, CVE-2026-45115)
├── php/                  # SOAP RCE, ASLR bypass (rules 10, 11)
├── pillow/               # ImageCms OOB write PoC execution + crash detection (rules 53, 54, 55)
├── rustdesk/             # Session bypass x4 (rules 03, 19, 23, 33, 34)
├── splunk/               # splunkd child process, reverse shell, REST API, PoC artifact (rules 20, 31, 32, 43)
└── vlc/                  # VP9 crash/child spawn, WER report, VP9 decode child (rules 04, 29, 30)

Coverage by Product

CVE Coverage

Platform Coverage

Priority Rules — Action First

1. libssh2/cve-2026-55200-pre-auth-rce-child-process.kql — CVSS 9.2, active exploitation
2. libssh2/libssh2-linkage-recon-ldd-readelf-strings.kql — catch pre-exploitation recon
3. libssh2/cve-2026-55200-libpwn-harness-binaries-endpoint.kql — harness binaries on disk
4. exploitarium-generic/multi-cve-exploitarium-sweep-simultaneous-poc.kql — broadest sweep
5. splunk/cve-2026-20253-splunkd-unexpected-child-process.kql — high-value enterprise target
6. rustdesk/rustdesk-session-permission-bypass-comprehensive.kql — full multi-branch coverage
7. curl/curl-smtp-expn-crlf-injection-attempt.kql — relevant for any mail-sending SaaS using libcurl

Rule Index

Usage

Each .kql file contains the full rule body plus a metadata header (severity, platforms, MITRE IDs, CVEs, detections.ai link). Import directly into Sentinel as a scheduled query rule or Defender XDR as a custom detection.

Rules are also available in Splunk SPL, Elastic, Chronicle, and other stacks via the detections.ai language translation feature.

Author

Ethan Andrews Trusted Contributor — detections.ai