What it detects01
What does 'Favicon Hash Change Burst Window' indicate?
It indicates that multiple favicon hash changes occurred within a short time window, reflecting sudden instability in favicon assets.
Favicon Hash Change Burst Window
It indicates that multiple favicon hash changes occurred within a short time window, reflecting sudden instability in favicon assets.
Analyst Q&A
What this signal answers
The questions every analyst asks before acting on this signal.
Why it matters02
Why is this considered a risky signal?
Burst-style favicon changes are commonly observed during rapid redeployments, campaign launches, or evasive rebuilds of malicious or suspicious web infrastructure.
How analysts use it03
How should SOC analysts use this label?
Use it to strengthen suspicion when combined with high favicon hash churn or other infrastructure instability indicators.
Often paired with:alert_only
Evidence shape
What Favicon Hash Change Burst Window looks like in the response
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.
json
{
"slug": "favicon_hash_change_burst_window",
"name": "Favicon Hash Change Burst Window",
"group": "http_crawling_history",
"subgroup": "favicon_behaviour",
"direction": "malicious",
"evidence": {
"favicon_hash": "-1293291467",
"unique_hash_count_90d": 3,
"favicon_domain": "cdn-login-assets[.]top",
"hosting_type": "third_party",
"service_match": false
}
}Siblings
Peers in Favicon Behavior
16 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
Favicon Hash Periodic Rotation Pattern
It indicates that favicon hashes change following a regular or repeating time pattern, suggesting automated or scheduled…
Malicious
Favicon Hash Recently First Seen
It indicates that a recent change occurred in the favicon hash associated with the domain, highlighting short-term insta…
Malicious
High Favicon Hash Churn
It indicates that the favicon hash associated with a domain has changed over time, reflecting instability in the site's …
MaliciousCore
Stable Single Favicon Hash
It indicates that only one favicon hash has been observed for the domain and that the hash has not changed across multip…
Safe
In the wild
See Favicon Hash Change Burst Window fire on real IOCs
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