SYNful Knock
Software · ATTACK:enterprise:S0519
Attributed source ↗ · Plaintext record · Complete record and assertions JSON
Inspect structured metadata and provenance
{
"id": "ATTACK:enterprise:S0519",
"title": "SYNful Knock",
"type": "Software",
"source_url": "https://attack.mitre.org/software/S0519",
"snapshot": "enterprise-attack-20.0.json",
"status": "active",
"rights": "Source metadata only; source notices retained; no operational prose or payloads",
"review_status": "machine-extracted; source-specific checks passed, editorial review pending",
"stix_id": "malware--84c1ecc6-e5a2-4e8a-bf4b-651a618e0053",
"external_id": "S0519",
"domain": "enterprise",
"created": "2020-10-19T16:38:11.279Z",
"modified": "2025-04-15T19:46:34.695Z",
"version": "1.1",
"aliases": [
],
"tactics": [
],
"source_references": [
{
"source_name": "Mandiant - Synful Knock",
"url": "https://cloud.google.com/blog/topics/threat-intelligence/synful-knock-acis/"
},
{
"source_name": "Cisco Synful Knock Evolution",
"url": "https://blogs.cisco.com/security/evolution-of-attacks-on-cisco-ios-devices"
}
]
}Explicit source assertions (3)
First 80 shown here; the complete set is in this record’s JSON and plaintext. Each relationship retains its source and locator. No inferred relationships are added.
ATTACK:enterprise:S0519 → uses → ATTACK:enterprise:T1601.001
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--1fbc7b2a-1cdb-455b-bd5a-b0ff29efe800
Mandiant - Synful Knock · Cisco Synful Knock EvolutionATTACK:enterprise:S0519 → uses → ATTACK:enterprise:T1205
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--5d9b14c3-70ea-46b3-9b0d-1595c215efec
Mandiant - Synful KnockATTACK:enterprise:S0519 → uses → ATTACK:enterprise:T1556.004
MITRE ATT&CK: Source assertion; no new actor identity, alias equivalence, CVE exploitation or causal inference. Procedure prose omitted.
Assertion source · Locator: relationship--d3eec81c-8d8d-486d-919b-dc63a12555df
Mandiant - Synful Knock