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Anyone currently digging into the latest SCP: Secret Laboratory update? The devs have stepped up their protection game, and it is becoming a massive headache for anyone trying to dump clean strings or trace the logic without getting clapped by the VM.
The Current Situation
Trying to tear down the SCPSL anti-cheat right now is a lesson in frustration. They have moved to a much more aggressive implementation. If you are looking at the binary in IDA, you are just seeing fragmented junk and virtualized blocks that lead nowhere. Some initial research into the module shows they are leaning heavily on network-based validation and heavy obfuscation.
Technical Breakdown of the Obstacles
The Signature Extraction Problem
The main wall is how to extract detection signatures—whether they are memory scan signatures or behavioral detection logic—while they are tucked under the Themida 3 VM. Without a solid devirtualizer, tracing the execution flow to see what the AC is actually looking for (offsets, heartbeat, integrity checks) is a nightmare.
When facing an AC setup like this with encrypted comms and VM protection, are people finding more success with dynamic tracing/vmp-style unpacking projects, or is it better to hunt for a different entry point entirely?
How are you guys handling the devirtualization side of things for SCPSL lately?
The Current Situation
Trying to tear down the SCPSL anti-cheat right now is a lesson in frustration. They have moved to a much more aggressive implementation. If you are looking at the binary in IDA, you are just seeing fragmented junk and virtualized blocks that lead nowhere. Some initial research into the module shows they are leaning heavily on network-based validation and heavy obfuscation.
Technical Breakdown of the Obstacles
- Manual Mapping Failure — Even injecting before the anti-cheat initializes to hook Windows APIs is proving inefficient. Blind hooking is not capturing the critical detection logic, meaning the 'heavy lifting' happens elsewhere.
- Network Obfuscation — While the AC definitely transmits packets (confirmed by hooking send in ws2_32.dll), the actual protocol is a black box. References to OpenSSL, cURL, and various Crypto libraries are present, but standard hooks on these functions are either being bypassed or never triggered.
- Themida 3 Virtualization — This is the real killer. The majority of the critical code sections are virtualized. Static analysis is essentially dead on arrival for these segments.
Binary Analysis Tooling: IDA Pro + Hex-Rays
Protocol references found: OpenSSL, cURL, Crypto
Protection: Themida 3 (VM/Virtualization enabled)
Injection Method tested: Manual Map
Protocol references found: OpenSSL, cURL, Crypto
Protection: Themida 3 (VM/Virtualization enabled)
Injection Method tested: Manual Map
The Signature Extraction Problem
The main wall is how to extract detection signatures—whether they are memory scan signatures or behavioral detection logic—while they are tucked under the Themida 3 VM. Without a solid devirtualizer, tracing the execution flow to see what the AC is actually looking for (offsets, heartbeat, integrity checks) is a nightmare.
When facing an AC setup like this with encrypted comms and VM protection, are people finding more success with dynamic tracing/vmp-style unpacking projects, or is it better to hunt for a different entry point entirely?
How are you guys handling the devirtualization side of things for SCPSL lately?
