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ASN REPORT — AS21859 · Zenlayer Inc

First sighted: April 30, 2023, 3 a.m. · Last sighted: Jan. 11, 2026, 1:59 a.m.

Risk
82 (high)
Total hits
6913
Total errors
1781
Observed IPs
1715
Top country
N/A
Top city
N/A

Risk

Model: v1 Computed: 2026-01-18 11:55:27
Risk score
82
High
Risk gradient
Key drivers are enriched against the published annotator catalog when available; otherwise sensible defaults are used.
Key drivers
Command injection attempts
Request content resembles attempts to execute OS commands via an application.
cmdi
Hits 122
Points 2264.28
Path traversal attempts
Request paths/parameters resemble attempts to access files outside intended directories.
trav
Hits 108
Points 715.47
Automated client behavior
Traffic patterns strongly suggest automation rather than a human-operated browser.
bot
Hits 1054
Points 274.04
Sensitive file probing
Requests target commonly sensitive files, configs, backups, or administrative resources.
sfp
Hits 44
Points 272.41
Firewall probing
Traffic behavior suggests probing of access controls and protected surfaces.
fwprobe
Hits 30
Points 261.54
Credential brute forcing
Repeated authentication attempts consistent with password guessing or credential stuffing.
cred
Hits 115
Points 251.90
Scan velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
scan_velocity
Hits 76
Points 151.20
Protocol anomaly
Request structure or protocol-level signals deviate from typical browser HTTP traffic.
proto
Hits 52
Points 28.24
User-Agent anomaly
User-Agent signals look missing, inconsistent, or indicative of non-browser tooling.
ua
Hits 241
Points 27.58
HTTP method anomaly
Unusual or unexpected HTTP methods observed for the target endpoints.
method
Hits 38
Points 15.50

Traffic

Rollup

Daily activity (hits per day) and basic HTTP rollup counters for this ASN.

Loading activity…
Daily activity (hits per day). Total in window: —.
Traffic rollup
HTTP status classes, URL diversity, and totals.
2xx
3525
3xx
1354
4xx
1638
5xx
143
Unique URLs
2570
Total hits
6913
First seen
April 30, 2023, 3 a.m.
Last seen
Jan. 11, 2026, 1:59 a.m.

Annotators (All-time)

Heatmap of annotator × severity. Darker cells mean more volume in that band. Tip: switch to Weighted points to see what drives impact (not just noise).

Severity →
Low High
Command injection attempts cmdi
Request content resembles attempts to execute OS commands via an application.
hits 122 pts 2264.28
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
28 49 1 1026.26 Nov. 17, 2024, 1:06 a.m. Aug. 12, 2025, 11:29 a.m.
cmdi 49
22 49 1 687.22 Nov. 17, 2024, 1:06 a.m. Aug. 12, 2025, 11:29 a.m.
cmdi 49
30 24 1 550.80 Jan. 23, 2025, 10:48 p.m. May 17, 2025, 7:50 a.m.
cmdi 24
Path traversal attempts trav
Request paths/parameters resemble attempts to access files outside intended directories.
hits 108 pts 715.47
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
28 40 1 267.90 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:29 a.m.
trav 40
26 40 1 243.36 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:29 a.m.
trav 40
30 28 1 204.20 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:18 a.m.
trav 28
Automated client behavior bot
Traffic patterns strongly suggest automation rather than a human-operated browser.
hits 1054 pts 274.04
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
8 1054 1 274.04 July 5, 2023, 11:14 p.m. Dec. 17, 2025, 4:25 p.m.
bot 1054
Sensitive file probing sfp
Requests target commonly sensitive files, configs, backups, or administrative resources.
hits 44 pts 272.41
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
34 40 1 257.31 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:29 a.m.
sensitive_file 40
22 4 1 15.10 July 3, 2025, 2:48 p.m. July 3, 2025, 2:48 p.m.
sensitive_file 4
Firewall probing fwprobe
Traffic behavior suggests probing of access controls and protected surfaces.
hits 30 pts 261.54
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
22 23 1 182.16 Nov. 12, 2024, 4:10 a.m. Sept. 21, 2025, 4:23 a.m.
fwprobe 23
28 7 1 79.38 Nov. 20, 2023, 9:14 p.m. Sept. 20, 2024, 3 a.m.
fwprobe 7
Credential brute forcing cred
Repeated authentication attempts consistent with password guessing or credential stuffing.
hits 115 pts 251.90
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 65 1 251.90 Nov. 15, 2023, 3:43 a.m. Nov. 25, 2025, 12:16 a.m.
cred 65
0 50 1 0.00 Nov. 15, 2023, 3:43 a.m. Nov. 25, 2025, 12:16 a.m.
cred 50
Scan velocity scan_velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
hits 76 pts 151.20
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
20 18 1 58.32 Nov. 17, 2024, 1:06 a.m. Dec. 5, 2024, 7:25 a.m.
scan_velocity 18
22 12 1 42.77 Nov. 17, 2024, 1:06 a.m. Dec. 5, 2024, 7:25 a.m.
scan_velocity 12
18 10 1 29.16 Nov. 17, 2024, 1:05 a.m. Dec. 5, 2024, 7:25 a.m.
scan_velocity 10
16 6 1 15.55 Nov. 17, 2024, 1:05 a.m. Dec. 5, 2024, 7:24 a.m.
scan_velocity 6
10 4 1 5.40 Dec. 19, 2023, 10:12 p.m. Feb. 2, 2025, 7:44 a.m.
scan_velocity 4
0 26 1 0.00 Dec. 19, 2023, 10:12 p.m. Feb. 2, 2025, 7:44 a.m.
scan_velocity 26
Protocol anomaly proto
Request structure or protocol-level signals deviate from typical browser HTTP traffic.
hits 52 pts 28.24
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
11 28 1 17.25 Sept. 12, 2024, 4:06 a.m. Dec. 1, 2025, 11:36 a.m.
proto 28
12 14 1 9.68 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:15 a.m.
proto 14
3 10 1 1.32 Sept. 12, 2024, 11:25 a.m. Aug. 7, 2025, 11:19 p.m.
proto 10
User-Agent anomaly ua
User-Agent signals look missing, inconsistent, or indicative of non-browser tooling.
hits 241 pts 27.58
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 117 1 16.85 Aug. 13, 2023, 6:40 p.m. May 16, 2025, 11:51 p.m.
ua 117
6 77 1 5.54 Nov. 15, 2023, 3:46 a.m. Aug. 7, 2025, 11:19 p.m.
ua 77
8 43 1 4.51 Aug. 13, 2023, 6:39 p.m. Aug. 19, 2025, 10:24 a.m.
ua 43
12 4 1 0.67 July 3, 2025, 2:48 p.m. July 3, 2025, 2:48 p.m.
ua 4
HTTP method anomaly method
Unusual or unexpected HTTP methods observed for the target endpoints.
hits 38 pts 15.50
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
8 38 1 15.50 Sept. 12, 2024, 4:06 a.m. Jan. 4, 2025, 2:58 a.m.
method 38
Request size anomaly request_size
Requests are unusually large or shaped in a way that suggests abuse or automation.
hits 30 pts 2.34
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
12 5 1 2.34 July 5, 2023, 11:14 p.m. Nov. 28, 2025, 5:27 p.m.
request_size 5
0 25 1 0.00 Dec. 27, 2024, 12:51 p.m. Nov. 28, 2025, 5:27 p.m.
request_size 25
Referrer abuse ref
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
hits 12 pts 1.51
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
6 12 1 1.51 Nov. 15, 2023, 3:43 a.m. Feb. 10, 2025, 10:54 p.m.
ref 12

HTTP Status Breakdown

Response mix grouped by status class (2xx/3xx/4xx/5xx). Auto-loads a single aggregation and renders a donut.

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Running one aggregation and rendering the chart.

Geolocation

Live geolocation and map tiles auto-load for this ASN snapshot (peer IPs with coordinates).

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SUBNETS HELD BY THIS ISP

Derived from ISP snapshot peers (Option A). Grouped into IPv4 /24 and IPv6 /48 by default.
IPv4
IPv6
Limit
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Interesting IPs

Top risky peers inside this ASN (latest snapshot). Sorted by risk score, then hits.

No peer rows available for this ASN snapshot.