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Support parsing encoded/binary protobuf data #30

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puffyCid opened this issue Nov 19, 2024 · 2 comments · May be fixed by #34
Open

Support parsing encoded/binary protobuf data #30

puffyCid opened this issue Nov 19, 2024 · 2 comments · May be fixed by #34
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@puffyCid
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puffyCid commented Nov 19, 2024 •
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Some log entries (specifically Statedump entries) may contain binary Protobuf data. Even though we do not have the .proto files, it still possible to parse the binary data (with caveats).

It would be cool if this library supported attempts to parse the binary protobuf data. Right now the library makes no attempts to parse this

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Some example data can be found in the tests.zip file
ex: ./system_logs_monterey.logarchive/Special/000000000000000d.tracev3

Using CyberChef the following example:

10, 45, 99, 111, 109, 46, 97, 112, 112, 108, 101, 46, 97, 112, 112, 115, 116, 111, 114, 101, 100, 46, 77, 105, 103, 114, 97, 116, 111, 114, 77, 105, 115, 99, 101, 108, 108, 97, 110, 101, 111, 117, 115, 84, 97, 115, 107, 10, 40, 99, 111, 109, 46, 97, 112, 112, 108, 101, 46, 97, 112, 112, 115, 116, 111, 114, 101, 100, 46, 77, 105, 103, 114, 97, 116, 111, 114, 65, 112, 112, 85, 115, 97, 103, 101, 84, 97, 115, 107, 10, 38, 99, 111, 109, 46, 97, 112, 112, 108, 101, 46, 97, 112, 112, 115, 116, 111, 114, 101, 100, 46, 77, 105, 103, 114, 97, 116, 111, 114, 65, 114, 99, 97, 100, 101, 84, 97, 115, 107

Can be parsed into:

{
    "field #1: L-delim (e.g. string, message)": [
        "com.apple.appstored.MigratorMiscellaneousTask",
        "com.apple.appstored.MigratorAppUsageTask",
        "com.apple.appstored.MigratorArcadeTask"
    ]
}

@puffyCid puffyCid self-assigned this Nov 19, 2024
@puffyCid puffyCid changed the title Support parsing protobuf data Support parsing encoded/binary protobuf data Nov 19, 2024
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puffyCid commented Nov 19, 2024 •
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Looks like same binary data may have extra data? Or may have extended the protobuf spec?

48, 129, 230, 2, 1, 8, 49, 115, 48, 19, 12, 9, 79, 83, 86, 101, 114, 115, 105, 111, 110, 12, 6, 50, 49, 69, 50, 53, 56, 48, 23, 12, 9, 77, 111, 100, 101, 108, 78, 97, 109, 101, 12, 10, 77, 97, 99, 32, 83, 116, 117, 100, 105, 111, 48, 27, 12, 22, 77, 101, 115, 115, 97, 103, 101, 80, 114, 111, 116, 111, 99, 111, 108, 86, 101, 114, 115, 105, 111, 110, 2, 1, 0, 48, 38, 12, 12, 67, 111, 109, 112, 117, 116, 101, 114, 78, 97, 109, 101, 12, 22, 65, 110, 100, 114, 111, 105, 100, 226, 128, 153, 115, 32, 77, 97, 99, 32, 83, 116, 117, 100, 105, 111, 48, 25, 2, 1, 1, 12, 2, 97, 107, 2, 8, 20, 10, 119, 115, 0, 0, 0, 1, 48, 0, 48, 0, 48, 0, 49, 0, 5, 0, 2, 1, 0, 1, 1, 0, 5, 0, 5, 0, 5, 0, 48, 0, 49, 65, 48, 17, 12, 13, 116, 114, 117, 115, 116, 101, 100, 95, 114, 105, 110, 103, 115, 49, 0, 48, 44, 12, 4, 85, 85, 73, 68, 12, 36, 50, 69, 65, 49, 51, 54, 67, 70, 45, 50, 68, 65, 57, 45, 52, 54, 69, 50, 45, 57, 56, 49, 65, 45, 48, 69, 53, 68, 67, 57, 48, 65, 52, 53, 53, 70

Neither CyberChef or bbpb can parse it. Converting to raw data via CyberChef, returns:

0•æ␂␁␈1s0␓
	OSVersion
␆21E2580␗
	ModelName
␊Mac Studio0␛
␖MessageProtocolVersion␂␁␀0&

ComputerName
␖Androidâ••s Mac Studio0␙␂␁␁
␂ak␂␈␔␊ws␀␀␀␁0␀0␀0␀1␀␅␀␂␁␀␁␁␀␅␀␅␀␅␀0␀1A0␑
␍trusted_rings1␀0,
␄UUID
$2EA136CF-2DA9-46E2-981A-0E5DC90A455F```

@puffyCid puffyCid linked a pull request Nov 22, 2024 that will close this issue
Basic Protobuf parsing support #34
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Basic Protobuf parsing support mandiant/macos-UnifiedLogs
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