A worm infects some vulnerable hosts, they organize into a P2P botnet with some botmaster and start exchanging C&C traffic. Experimenter wants to observe the evolution of the botnet and the amount of traffic that master receives. There are two classes of experiments here that need to be combined together:

1. an experiment where worm spreads and infects vulnerable hosts
2. an experiment where some hosts organize into P2P network and somehow elect a leader who then sends commands to them and they may send reports back

Example 1: Botnet

This example used two metadescriptions. Let's go through each of them. This example is written in [CurrentlyProposedLanguage].

Worm spread metadescription

• Logical topology:

Objects:

VNode extends Node

VNode := {state = Vulnerable, Vulnerability vulnerability = x}

INode := VNode {state = Infected}

Cardinality:

|INode|_>=1

|VNode|_>=1

Relationships:

• Timeline of events:

Definitions:

each Inode i, some VNode v:

e1 := {type = SCAN, origin = i, destination = v, vulnerability = x }

s1 := {v.state = Infected}

Timeline:

e1 -> if (e1.vulnerability == v.vulnerability) then s1

• Invariants: No additional ones are needed here.

P2P w leader and C&C traffic metadescription

• Logical topology:

Objects:

Peer extends Node

Peer := {Peer[] peers = {}, Leader leader = none }

Leader extends Peer

Leader := {Peer[] slaves = {} }

Cardinality:

|Peer|_>=2

|Leader|_>=1

Relationships:

• Timeline of events:

Definitions:

each Peer peer1, some Peer peer2:

e1 := {type = WANNAPEER, origin = peer1, destination = peer2}

e2 := {type = YESPEER, origin = peer2, destination = peer1}

s1 := {peer2.peers += peer1}

s2 := {peer2.peers += peer1}

each Peer x:

e3 := {type = LEADERIS, origin = p in x.peers, destination = x, Leader yourleader = leader}

s3 := {x.leader = leader}

e4 := {type = HELLO, origin = x, destination = x.leader}

e5 := {type = CMD, origin = x.leader, destination = x, String cmd = c}

e6 := {type = REPORT, origin = x, destination = x, String report = r}

Timeline:

e1 -> [s1 and e2 -> s2] | | e3 -> s3 -> e4 -> e5 -> [e6]

• Invariants: No additional ones are needed here.

Experiment design

Now I'm a user who wants to design my experiment. I need to combine two metadescriptions and somehow tie them down to generator choices. To combine I need to specify how outputs of worm metadescription match inputs of P2P metadescription. I'll do something like this:

Worm w, P2P p2p

p2p.Peer := w.Infected

w | | p2p

i.e. each infected host becomes a peer.