What it detects01
What does 'Stable Single Favicon Hash' indicate?
It indicates that only one favicon hash has been observed for the domain and that the hash has not changed across multiple crawl observations.
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 multiple crawl observations.
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 safe-leaning signal?
Legitimate and well-maintained websites typically keep a consistent favicon, whereas disposable or frequently redeployed infrastructures often change favicon assets.
How analysts use it03
How should SOC analysts use this label?
Use it as a supporting safe-context signal to reduce suspicion when no stronger malicious indicators are present.
Evidence shape
What Stable Single Favicon Hash 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_stable_single",
"name": "Stable Single Favicon Hash",
"group": "http_crawling_history",
"subgroup": "favicon_behaviour",
"direction": "safe",
"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.
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
Favicon Hash Change Burst Window
It indicates that multiple favicon hash changes occurred within a short time window, reflecting sudden instability in fa…
Malicious
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
In the wild
See Stable Single Favicon Hash fire on real IOCs
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