Writing a Custom Config

Prometheus accepts a Lua config file via --config.

prometheus-lua --config ./prometheus.config.lua ./input.lua

File format

The config file must be executable Lua code that returns a table:

return {
  LuaVersion = "Lua51",
  PrettyPrint = false,
  VarNamePrefix = "",
  NameGenerator = "MangledShuffled",
  Seed = 0,
  Steps = {
    { Name = "EncryptStrings", Settings = {} },
    { Name = "Vmify", Settings = {} },
    { Name = "WrapInFunction", Settings = { Iterations = 1 } },
  }
}

Step ordering matters

Steps are applied in order. The same step can appear multiple times.

Name generator values

Supported string values (from src/prometheus/namegenerators.lua):

• Mangled
• MangledShuffled
• Il
• Number
• Confuse

Reproducibility

• Seed > 0: deterministic RNG seed
• Seed <= 0: randomized seed (OpenSSL if available, else current time)

Common mistakes

• Misspelled step names in Name
• wrong setting types (for example string instead of number)
• invalid VarNamePrefix for the selected Lua version