68 lines
6.5 KiB
Markdown
68 lines
6.5 KiB
Markdown
# Agent_Release_x64.exe — finding ledger
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- SHA-256 `6f2be7b8eb799ba51b359d1958720aac5baee5b7ee0d1d36684d3cbd72d45469`, 1,472,512 bytes
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- PE32+ x86-64, Windows CUI, MSVC linker 10 (VS2010; imports MSVCR100/MSVCP100)
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- PDB reference `F:\work\Project\Output\Exe\Agent_Release_x64.pdb` (GUID a4775113-…, age 1) — PDB not available; names are Ghidra defaults
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- Ghidra 12.1.2 via REA 6.5.0; 6,814 procedures, 1,472 defined strings (`ev_9fe3a449…`)
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- Full Evidence: `evidence-bundle.json` (14 records). Static analysis only — nothing here was observed at runtime.
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## Status: first pass (process-control core). Network protocol and config parsing not yet decompiled.
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## Language: C++ (high confidence)
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Observed C++-only artifacts: MSVC RTTI type descriptors (`.?AV…@@`, incl. templates
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`MBISingleton<T>`, `CFastArray<T>`), vftables, `__CxxFrameHandler3` (C++ EH),
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`operator new/delete`, MSVCP100 `std::basic_ostream` imports. Multiple vftables
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per class (e.g. `MagiAgentNetwork`, `MGAgentManagerSession`) indicate multiple
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inheritance. Statically linked C++ libraries: ProudNet, TinyXML (`TiXml*`), ATL.
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## Outputs
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Porting spec (Win32 → Linux substitutions, behaviour to reproduce, original bugs): `porting.md`.
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| Path | Content |
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| `full/functions/<addr>.c` | Ghidra pseudocode for all 6,423 non-thunk functions (1 failed; see `full/index.tsv`). Includes library code (ProudNet, TinyXML, CRT) — not yet labelled. |
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| `full/index.tsv` | address, namespace, name, body size, decompile status |
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| `full/vtables.tsv` | 1,430 RTTI vftable slots → function addresses (all classes) |
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| `cpp/classes.hpp` | Generated C++ skeleton of 43 application classes from vftables (compiles); method names unknown |
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| `cpp/AgentProcessControl.cpp` | Hand-lifted C++ for the 6 analyzed functions; names inferred, not compilable as-is |
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| `../scripts/ExportDecomp.java`, `VTableMap.java` | Ghidra headless scripts that produced `full/` |
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Additional observations from the lift (`cpp/AgentProcessControl.cpp`):
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- Watcher thread never closes the process handle → handle leak per launch (observed).
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- `LaunchProcess` passes a stack `PROCESS_INFORMATION*` to the watcher thread; safe only because of the following `Sleep(1000)` (observed race, inference about intent).
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- `KillProcessByName` leaks the snapshot handle on the success path (observed).
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- RMI stubs give the protocol handler tables: `AgentManager2AgentStub` 24 slots (= 7 base + 17 RMIs 0x85fd–0x860d, identical to AgentManager's proxy; see `../AgentManager_Release_x64/evidence.md`), `Server2AgentStub` 19 (`full/vtables.tsv`).
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- Server-command switch is `0x14000e1e0` (0 on, 1/3 kill by PID, 4 patch, 7/0xb auto-revive toggles, others forwarded to the server); string commands `serveron`/`auto`/`update` in `0x140005950`.
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## Findings
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| # | Conclusion | Type | Evidence |
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| 1 | Process supervisor for the other server EXEs: launches them, kills them, watches for exit | **Observed** (code) | `0x1400094e0`, `0x140009780`, `0x140008c90` below |
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| 2 | Launch: `CreateProcessW(NULL, cmdline, …, CREATE_NEW_CONSOLE (0x10), …, workdir, …)`; console 700×110, fill attr 0x17; closes thread handle, spawns watcher thread, returns PID (0 on failure, logs `=======Server Fail=======` + Path/File) | Observed | `0x1400094e0.pseudo.c`, `ev_e77cf4b5…` |
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| 3 | Command line = `<exe path for server type> + " " + <args>`; args either generated (`FUN_140027540`, a global option flag at `+0x152` selects) or the numeric server code. Logs `FAILED SERVER ON %s` on failure; reports result to AgentManager via RMI proxy | Observed (flow); arg contents **unknown** | `0x140008ea0.pseudo.c`, `ev_e87b1dd7…` |
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| 4 | Kill: Toolhelp32 snapshot, case-insensitive exe-name match, `OpenProcess(PROCESS_TERMINATE)`, `TerminateProcess(h,0)` — kills the **first** match only, by image name (not PID) | Observed | `0x140009780.pseudo.c`, `ev_ad71d730…` |
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| 5 | Watcher: polls `GetExitCodeProcess` every 10 ms while `STILL_ACTIVE` (0x103); on exit sends two RMI notifications to AgentManager; **relaunches** if per-server revive flag (`+0xd5`) or global flag (`+0x171`) is set | Observed; mapping of flags to `revive_server` XML key is **inference** | `0x140008c90.pseudo.c` |
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| 6 | Single instance via named mutex `Global\RustyHearts_Agent`; on ERROR_ALREADY_EXISTS / ACCESS_DENIED prints, sleeps 3 s, returns failure | Observed | `0x1400100b0.pseudo.c` |
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| 7 | Main run loop: startup banner, `CoInitialize`, builds network objects, kills a stale process by name before running (type `0x18` entry), loop `Sleep(1)` with 100 ms tick and 1 s FPS counter; optional delayed "Start Auto Server On" after a configured time (`+0x178`) | Observed | `0x1400037a0.pseudo.c`, `ev_2fa3bc1d…` |
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| 8 | Networking is **ProudNet** (Nettention) — `Proud::CNetServerImpl`, `CNetClientImpl`, RMI stubs/proxies | Observed (RTTI + assert strings) | strings `ev_47e1666c…` |
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| 9 | Agent is both a ProudNet server (for game servers: `SERVER2AGENT_PROTOCOL` stub, `AGENT2SERVER` proxy) and client of AgentManager (`AGENTMANAGER2AGENT` stub, `AGENT2AGENTMANAGER` proxy) | Inference from RTTI class names | strings `ev_47e1666c…` |
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| 10 | Config files: `option\agent_serveroption.xml`, `option\agent.xml`, `option\total_option.xml`, `option\patch.xml`, `option\customoption.xml`, `option\service_control.xml` | Observed (strings); which are actually read is **unknown** — `option\agent.xml` referenced from `FUN_1400f06e0` only | `ev_d4bb4bc3…` |
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| 11 | Crash reporting via BugTrap (`BT_*` imports) + `MiniDumpWriteDump`; also an HTTP error reporter `GET /PNReport/ReportError.php?Text=` (ProudNet's) | Observed (imports/strings); host contacted **unknown** | imports |
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## Named-function map (proposed, not applied in a persistent DB)
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| Address | Proposed name |
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| `0x1400037a0` | `MagiAgentServer::Run` (main loop) |
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| `0x140008ea0` | `ServerOn(serverEntry)` |
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| `0x1400094e0` | `LaunchProcess(cmdline) -> pid` |
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| `0x140008c90` | `ProcessWatchThread` |
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| `0x140009780` | `KillProcessByName(name)` |
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| `0x1400100b0` | `AcquireSingleInstanceMutex` |
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## Open questions / next steps
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- Decode RMI message IDs/handlers for `AGENTMANAGER2AGENT` and `SERVER2AGENT` (commands: All Server On/Down/Kill, Server Info, Shutdown, Notice, Patch).
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- Parse config XML loaders (`FUN_1400f06e0`, `MagiServerOption`), and map fields (`start_server`, `revive_server`, ports) to struct offsets.
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- Identify `FUN_140027540` (argument builder) to learn exact launch arguments.
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- Locate ProudNet SDK version to label library code (likely large share of the 6,814 functions).
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