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ASN REPORT — AS39396 · NBI Systems Ltd.

First sighted: May 28, 2025, 3 a.m. · Last sighted: Feb. 19, 2026, 2 a.m.

Risk
17 (low)
Total hits
307
Total errors
137
Observed IPs
6
Top country
Bulgaria
Top city
Rousse
Top region
Ruse

Risk

Model: v1 Computed: 2026-02-27 17:09:49
Risk score
17
Low
Risk gradient
Key drivers are enriched against the published annotator catalog when available; otherwise sensible defaults are used.
Key drivers
Credential brute forcing
Repeated authentication attempts consistent with password guessing or credential stuffing.
cred
Hits 72
Points 237.60
Sensitive file probing
Requests target commonly sensitive files, configs, backups, or administrative resources.
sfp
Hits 26
Points 125.84
Scan velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
scan_velocity
Hits 36
Points 92.16
Referrer abuse
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
ref
Hits 9
Points 1.62

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
170
3xx
0
4xx
137
5xx
0
Unique URLs
0
Total hits
307
First seen
May 28, 2025, 3 a.m.
Last seen
Feb. 19, 2026, 2 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
Credential brute forcing cred
Repeated authentication attempts consistent with password guessing or credential stuffing.
hits 72 pts 237.60
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 36 1 198.00 May 28, 2025, 3:37 a.m. May 28, 2025, 3:39 a.m. —
8 9 1 39.60 May 28, 2025, 3:37 a.m. May 28, 2025, 3:39 a.m. —
0 27 1 0.00 May 28, 2025, 3:37 a.m. May 28, 2025, 3:39 a.m. —
Sensitive file probing sfp
Requests target commonly sensitive files, configs, backups, or administrative resources.
hits 26 pts 125.84
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
22 26 1 125.84 May 28, 2025, 3:37 a.m. May 28, 2025, 3:39 a.m. —
Scan velocity scan_velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
hits 36 pts 92.16
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
24 6 1 25.92 May 28, 2025, 3:38 a.m. May 28, 2025, 3:39 a.m. —
26 3 1 14.04 May 28, 2025, 3:39 a.m. May 28, 2025, 3:39 a.m. —
22 3 1 11.88 May 28, 2025, 3:38 a.m. May 28, 2025, 3:38 a.m. —
20 3 1 10.80 May 28, 2025, 3:38 a.m. May 28, 2025, 3:38 a.m. —
18 3 1 9.72 May 28, 2025, 3:38 a.m. May 28, 2025, 3:38 a.m. —
16 3 1 8.64 May 28, 2025, 3:37 a.m. May 28, 2025, 3:37 a.m. —
14 2 1 5.04 May 28, 2025, 3:37 a.m. May 28, 2025, 3:37 a.m. —
12 2 1 4.32 May 28, 2025, 3:37 a.m. May 28, 2025, 3:37 a.m. —
10 1 1 1.80 May 28, 2025, 3:37 a.m. May 28, 2025, 3:37 a.m. —
0 10 1 0.00 May 28, 2025, 3:37 a.m. May 28, 2025, 3:39 a.m. —
Referrer abuse ref
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
hits 9 pts 1.62
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
6 9 1 1.62 May 28, 2025, 3:37 a.m. May 28, 2025, 3:39 a.m. —

HTTP Status Breakdown

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

Loading status mix…
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
Loading subnets…

Interesting IPs

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

109.121.136.24 low
Open report
17 /100
Last seen 2025-05-29 03:00
Hits
297
Errors
134
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.
85.187.216.167 low
Open report
0 /100
Last seen 2026-02-07 02:00
Hits
5
Errors
0
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.
212.21.133.32 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
2
Errors
2
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.
185.218.66.132 low
Open report
0 /100
Last seen 2026-02-19 02:00
Hits
1
Errors
0
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.
185.218.67.168 low
Open report
0 /100
Last seen 2026-02-13 02:00
Hits
1
Errors
1
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.
212.21.133.84 low
Open report
0 /100
Last seen 2026-02-12 02:00
Hits
1
Errors
0
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.