It indicates abnormal HTTP header structures such as unusually minimal or dense header sets, odd ordering, unexpected prefixes, uniform values, missing common headers, or cross-field inconsistencies that deviate from standard server behavior.
The questions every analyst asks before acting on this signal.
It indicates abnormal HTTP header structures such as unusually minimal or dense header sets, odd ordering, unexpected prefixes, uniform values, missing common headers, or cross-field inconsistencies that deviate from standard server behavior.
This is a supporting malicious-context signal with a single tier. It suggests tool-generated or non-standard server responses but is not conclusive alone; it gains weight when correlated with redirector behavior, risky cookies or shared infrastructure indicators.
A realistic shape of the entry the engine appends to the risk_signals array when this signal fires. Evidence keys are subgroup-default; per-signal overrides documented in the API reference.
{
"slug": "http_header_structure_anomaly",
"name": "Suspicious Header Structure",
"group": "http_crawling_history",
"subgroup": "http_header_behaviors",
"direction": "malicious",
"evidence": {
"missing_security_headers": 4,
"cors_origin": "*",
"cors_credentials_allowed": true,
"provider_type": "self_hosted",
"risky_cookie_count": 2
}
}12 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
It indicates that the site sets cookies issued by specific edge protection providers whose cookies appear far more often…
It indicates weak or overly permissive CORS configurations such as wildcard origins, broad method or header allowances, …
It indicates abnormal HTTP redirection patterns such as instant refresh redirects, header-based redirects, forced interm…
It indicates abnormal or inconsistent HTTP stack characteristics such as generic, rare, rapidly changing, or internally …
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