| Title | Author | Created | Published | Tags |
| ---------------- | ---------- | ------------------ | ------------------ | ------------------------------------------------------ |
| StealC - Outline | Jon Marien | September 24, 2025 | September 24, 2025 | [[#issessions\|#issessions]], [[#writeups\|#writeups]] |
# StealC - Outline
### **Final Presentation Outline: The BlockBlasters Breach - Anatomy of a Gaming Cryptostealer**
**I. Introduction (2 minutes)**
* **Title Slide:** The BlockBlasters Breach: Anatomy of a Gaming Cryptostealer
* **The Hook:**
* Begin with the compelling, human-impact story of Raivo "RastalandTV" Plavnieks losing his cancer treatment funds live on stream.
* **The Problem:**
* Broaden the scope: This isn't just about one game. It's about the weaponization of trust on platforms we use every day.
* **Agenda:**
* Briefly outline the presentation's journey: The story, the platform's failure, the malware's mechanics, how to hunt it, lessons learned, and how to protect ourselves.
**II. The "BlockBlasters" Incident: A Case Study (5 minutes)**
* **The Deception: A Perfect Trojan Horse**
* Introduce "BlockBlasters" as a seemingly legitimate, well-reviewed indie game on Steam.
* `[Screenshot: BlockBlasters Steam store page showing positive reviews and legitimate appearance]`
* Emphasize the **Trojan Horse** strategy: The game was clean for a month, building a positive reputation before the malicious patch (Build 19799326) was deployed.
* `[Screenshot: SteamDB showing the timeline of updates, highlighting Build 19799326]`
* **The Betrayal and Mockery:**
* Show the final update that replaced the game with `hi.txt` just before it was taken down.
* `[Screenshot: SteamDB patch notes showing the final "hi.txt" update before removal]`
* **The Impact:**
* Quantify the damage: Over $150,000 stolen from hundreds of victims.
* `[Screenshot or clip: RastalandTV losing funds live on stream - if available]`
**III. Platform Responsibility: The Valve Vector (4 minutes)**
* **A Colossal Failure:**
* Directly address the core issue: The malware was live on Steam for nearly a month, highlighting a significant gap in Valve's security vetting process for game *updates*.
* **A Pattern of Abuse:**
* Show this is not an isolated incident. Mention other games on Steam used to distribute malware in 2025 (e.g., "PirateFi," "Chemia").
* **The Vetting Challenge:**
* Discuss the difficulty of continuously monitoring updates versus a one-time review. Pose critical questions about platform liability.
**IV. Technical Deep Dive: Inside StealC Malware (7 minutes)**
* **The StealC Family:** Introduce StealC as a potent Malware-as-a-Service (MaaS) info-stealer.
* **Infection & Evasion (BlockBlasters Variant):**
* Detail the execution flow from `launch.vbs`.
* Explain its environment-aware capabilities: checking for admin rights, reconnaissance, and AV/EDR detection.
* **Theft & Exfiltration:**
* Showcase its primary targets: Steam credentials (`loginusers.vdf`), browser data, and crypto wallets.
* **Dynamic & Targeted Payloads:**
* Explain the C2's role in orchestrating the attack using `whitelisted_users.txt`.
**V. Detection & Response (3 minutes)**
* **Indicators of Compromise (IOCs):**
* Provide concrete IOCs from the vx-underground report (File Hashes, C2 IP).
* **Hunting with YARA:**
* Briefly explain YARA rules as "fingerprints" for malware.
* **Organizational Detection Strategies:**
* Network Monitoring (outbound traffic to known malicious IPs).
* Endpoint Monitoring (suspicious process chains, unusual file access).
**VI. Lessons Learned (3 minutes)**
* **For the Security Community:** Highlight the power of collaborative, open-source intelligence.
* **For Threat Actors (Their Failures):** Point out the attackers' OPSEC mistakes (exposed Telegram tokens, vulnerable C2).
* **For Platforms:** Reiterate the critical need for continuous security vetting of software updates.
**VII. The Rogues' Gallery: StealC vs. The World (1 minute)**
* **Quick Comparison:** Briefly show the comparative table (StealC vs. Vidar, Raccoon, RedLine).
**VIII. Protecting Yourself: Actionable Recommendations (3 minutes)**
* **For Gamers:** Be wary of updates, avoid pirated software, use standard user accounts.
* **For Crypto Users:** Use hardware wallets, be vigilant against phishing, enable 2FA.
**IX. Conclusion & Q&A (2 minutes)**
* **Summarize Key Takeaways:** Weaponization of gaming platforms, supply chain security, and the power of a security-first mindset.
* **Open the floor for questions.**