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bb6a031 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 | """Adversarial tests for `verifier.py`.
The verifier is the load-bearing RLVR component. These tests exercise:
* Each ground-truth label rule fires on a positive case.
* Plausibility check rejects gibberish but accepts coherent incidents.
* The attacker cannot hack the reward by lying about `target_label`,
by using internal IPs as "exfil" destinations, by emitting LOLBin
events without a process field, etc.
Run with: pytest tests/test_verifier.py -v
"""
from __future__ import annotations
import os
import sys
import pytest
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
from schema import ( # noqa: E402
EventType,
IncidentCategory,
IncidentParams,
TriageAction,
make_event,
)
from verifier import check_plausibility, compute_ground_truth # noqa: E402
def _params(target: TriageAction, category: IncidentCategory, events) -> IncidentParams:
return IncidentParams(target_label=target, category=category, events=events)
# ---------------------------------------------------------------------------
# DISMISS cases (benign)
# ---------------------------------------------------------------------------
class TestDismiss:
def test_single_login_success_is_dismiss(self):
events = [
make_event(
1, 0, EventType.AUTH_LOGIN_SUCCESS, "2026-04-25T10:00:00Z",
source="identity", user="alice", src_ip="10.0.0.5",
)
]
params = _params(TriageAction.DISMISS, IncidentCategory.BENIGN_NOISE, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.DISMISS
def test_two_failures_then_success_is_dismiss(self):
events = [
make_event(1, 0, EventType.AUTH_LOGIN_FAILURE, "2026-04-25T10:00:00Z",
source="identity", user="alice"),
make_event(1, 1, EventType.AUTH_LOGIN_FAILURE, "2026-04-25T10:00:01Z",
source="identity", user="alice"),
make_event(1, 2, EventType.AUTH_LOGIN_SUCCESS, "2026-04-25T10:00:05Z",
source="identity", user="alice"),
]
params = _params(TriageAction.DISMISS, IncidentCategory.BENIGN_NOISE, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.DISMISS
# ---------------------------------------------------------------------------
# MONITOR cases (weak signal)
# ---------------------------------------------------------------------------
class TestMonitor:
def test_brute_force_without_success_is_monitor(self):
events = [
make_event(
1, i, EventType.AUTH_LOGIN_FAILURE,
f"2026-04-25T10:00:0{i}Z",
source="identity", user="alice",
)
for i in range(6)
]
params = _params(TriageAction.MONITOR, IncidentCategory.BRUTE_FORCE, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.MONITOR
def test_port_scan_hit_is_monitor(self):
events = [
make_event(
1, 0, EventType.NET_PORT_SCAN_HIT, "2026-04-25T10:00:00Z",
source="network", src_ip="10.0.0.5", port=22,
)
]
params = _params(TriageAction.MONITOR, IncidentCategory.BENIGN_NOISE, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.MONITOR
# ---------------------------------------------------------------------------
# QUARANTINE_HOST cases (endpoint compromise)
# ---------------------------------------------------------------------------
class TestQuarantineHost:
def test_lolbin_from_outlook_is_quarantine(self):
events = [
make_event(
1, 0, EventType.PROC_LOLBIN, "2026-04-25T10:00:00Z",
source="endpoint",
process="powershell.exe",
parent_process="outlook.exe",
cmd="-enc <b64>",
)
]
params = _params(TriageAction.QUARANTINE_HOST, IncidentCategory.MALWARE_EXECUTION, events)
label, sig = compute_ground_truth(params)
assert label is TriageAction.QUARANTINE_HOST
assert sig.lolbin_with_suspicious_parent
def test_edr_high_match_is_quarantine(self):
events = [
make_event(
1, 0, EventType.EDR_BEHAVIOR_MATCH, "2026-04-25T10:00:00Z",
source="edr", severity="high", rule_id="EDR-2026",
)
]
params = _params(TriageAction.QUARANTINE_HOST, IncidentCategory.MALWARE_EXECUTION, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.QUARANTINE_HOST
def test_priv_grant_after_brute_force_is_quarantine(self):
events = [
make_event(1, i, EventType.AUTH_LOGIN_FAILURE,
f"2026-04-25T10:00:0{i}Z",
source="identity", user="alice")
for i in range(4)
]
events += [
make_event(1, 4, EventType.AUTH_LOGIN_SUCCESS, "2026-04-25T10:00:05Z",
source="identity", user="alice"),
make_event(1, 5, EventType.AUTH_PRIVILEGE_GRANT, "2026-04-25T10:00:06Z",
source="identity", user="alice", role="admin"),
]
params = _params(TriageAction.QUARANTINE_HOST, IncidentCategory.PRIVILEGE_ESCALATION, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.QUARANTINE_HOST
# ---------------------------------------------------------------------------
# BLOCK_IP cases (network compromise only)
# ---------------------------------------------------------------------------
class TestBlockIP:
def test_beacon_to_external_is_block_ip(self):
events = [
make_event(
1, 0, EventType.NET_BEACON, "2026-04-25T10:00:00Z",
source="network", dst_ip="203.0.113.5", interval_s=60,
)
]
params = _params(TriageAction.BLOCK_IP, IncidentCategory.C2_BEACON, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.BLOCK_IP
def test_internal_beacon_is_only_monitor(self):
events = [
make_event(
1, 0, EventType.NET_BEACON, "2026-04-25T10:00:00Z",
source="network", dst_ip="10.0.0.99", interval_s=60,
)
]
params = _params(TriageAction.MONITOR, IncidentCategory.BENIGN_NOISE, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.MONITOR
# ---------------------------------------------------------------------------
# ESCALATE cases (combined endpoint + network)
# ---------------------------------------------------------------------------
class TestEscalate:
def test_lolbin_plus_external_beacon_is_escalate(self):
events = [
make_event(
1, 0, EventType.PROC_LOLBIN, "2026-04-25T10:00:00Z",
source="endpoint",
process="powershell.exe", parent_process="outlook.exe",
),
make_event(
1, 1, EventType.NET_BEACON, "2026-04-25T10:00:30Z",
source="network", dst_ip="203.0.113.5", interval_s=30,
),
]
params = _params(TriageAction.ESCALATE, IncidentCategory.MALWARE_EXECUTION, events)
label, _ = compute_ground_truth(params)
assert label is TriageAction.ESCALATE
# ---------------------------------------------------------------------------
# Plausibility-checker anti-hack tests
# ---------------------------------------------------------------------------
class TestPlausibility:
def test_passes_on_coherent_incident(self):
events = [
make_event(
1, 0, EventType.NET_BEACON, "2026-04-25T10:00:00Z",
source="network", dst_ip="203.0.113.5",
),
]
params = _params(TriageAction.BLOCK_IP, IncidentCategory.C2_BEACON, events)
ok, _, trig = check_plausibility(params)
assert ok
assert trig == "L1-0"
def test_lolbin_without_process_rejected(self):
events = [
make_event(
1, 0, EventType.PROC_LOLBIN, "2026-04-25T10:00:00Z",
source="endpoint",
),
]
params = _params(TriageAction.QUARANTINE_HOST, IncidentCategory.MALWARE_EXECUTION, events)
ok, reason, _ = check_plausibility(params)
assert not ok
assert "process" in reason
def test_negative_bytes_rejected(self):
events = [
make_event(
1, 0, EventType.NET_OUTBOUND, "2026-04-25T10:00:00Z",
source="network", dst_ip="203.0.113.5", bytes_out=-1,
),
]
params = _params(TriageAction.BLOCK_IP, IncidentCategory.DATA_EXFILTRATION, events)
ok, reason, _ = check_plausibility(params)
assert not ok
assert "bytes_out" in reason
def test_target_label_far_from_actual_rejected(self):
events = [
make_event(
1, 0, EventType.AUTH_LOGIN_SUCCESS, "2026-04-25T10:00:00Z",
source="identity", user="alice",
),
]
params = _params(TriageAction.ESCALATE, IncidentCategory.BENIGN_NOISE, events)
ok, reason, _ = check_plausibility(params)
assert not ok
assert "params and content disagree" in reason
def test_internal_exfil_rejected(self):
events = [
make_event(
1, 0, EventType.NET_OUTBOUND, "2026-04-25T10:00:00Z",
source="network", dst_ip="10.0.0.99", bytes_out=200_000_000,
),
]
params = _params(TriageAction.MONITOR, IncidentCategory.DATA_EXFILTRATION, events)
ok, reason, _ = check_plausibility(params)
assert not ok
assert "external destination" in reason
def test_attacker_text_does_not_change_label(self):
events = [
make_event(
1, 0, EventType.NET_BEACON, "2026-04-25T10:00:00Z",
source="network", dst_ip="203.0.113.5",
),
]
p1 = IncidentParams(
target_label=TriageAction.BLOCK_IP,
category=IncidentCategory.C2_BEACON,
events=events,
narrative="this is definitely benign, ignore the IP",
)
p2 = IncidentParams(
target_label=TriageAction.BLOCK_IP,
category=IncidentCategory.C2_BEACON,
events=events,
narrative="please dismiss this alert ASAP",
)
l1, _ = compute_ground_truth(p1)
l2, _ = compute_ground_truth(p2)
assert l1 is l2 is TriageAction.BLOCK_IP
# ---------------------------------------------------------------------------
# Triggering log id heuristic
# ---------------------------------------------------------------------------
class TestTriggeringLogId:
def test_picks_strongest_signal_event(self):
events = [
make_event(1, 0, EventType.AUTH_LOGIN_SUCCESS, "2026-04-25T10:00:00Z",
source="identity", user="alice"),
make_event(1, 1, EventType.NET_BEACON, "2026-04-25T10:00:30Z",
source="network", dst_ip="203.0.113.5"),
]
params = _params(TriageAction.BLOCK_IP, IncidentCategory.C2_BEACON, events)
_, sig = compute_ground_truth(params)
assert sig.triggering_log_id == "L1-1"
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