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smb

The smb identity: Server Message Block. Every field and what is required.

smb is the Server Message Block protocol (MS-SMB2). The target is host:port (default 445). The step sends and receives raw bytes as hex, and the session persists across steps, so a solution can stage an exchange and continue it.

Fields

smb uses the byte-session fields from tcp:

fieldrequiredwhat it does
sendyesthe bytes to send, as hex or hex "text"; empty when a step only reads
recvhow many bytes to read at most
recv_untilstop reading once this hex marker appears
timeouthow long to wait, in seconds
closeend the session after this step
capturepull a value out of the received hex for later steps

Example

smb negotiate
  meaning: send an SMB2 negotiate and look for the response
  send: fe534d4240...0000000000000000
  recv: 4096
  assert: contains "fe534d42"

Write attacks down. Verify them.

Download the binary, point it at a target you own, and get a verified result. The corpus is open and the format is plain text.