UDP traffic
Datagrams matching port:137 sent to HoneyLabs sensors over UDP in the last 7 days. DNS questions and QUIC client fingerprints are decoded on the sensor. Other datagrams are kept as their first bytes and labelled by protocol where it can be recognised.
A UDP source address can be forged, so each address listed here either sent the traffic or was impersonated by whoever did. UDP traffic is kept out of verdicts, feeds, watchlists and alerts.
Your plan searches up to 7d, so 30d was shortened. Plans
302
Datagrams
148
Source addresses
46
Networks
24
Countries
1
Destination ports
Traffic by type
Service queries
293 datagrams from 148 sourcesRequests a service answers without a handshake. Scanners send them to find open DNS, NTP, SNMP or SSDP servers, which are also the servers reflection attacks abuse.
Latest NetBIOS datagram, to 137/udp
payload bytes
00000000 d2 a8 01 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
Unrecognised
9 datagrams from 3 sourcesDatagrams no decoder recognised. Their first bytes are kept.
Latest Unrecognised datagram, to 137/udp
payload bytes
00000000 01 91 30 10 30 01 30 30 30 30 30 30 20 43 4b 41 |..0.0.000000 CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 30 30 21 |AAAAAAAAAAAAA00!| 00000030 30 01 |0.|
Amplification checks
Probes for services that answer a small request with a much larger reply, the property reflection attacks rely on.
| Service | Port | Datagrams | Sources | Factor |
|---|---|---|---|---|
| NetBIOS | 137/udp | 302 | 148 | 3.8 |
The factor is how many bytes a reachable server can send back for each byte it receives, as published by CISA in alert TA14-017A.
Destination ports
- 137/udp NetBIOS302
Networks
- AS215925 Vpsvault.host Ltd from 2 sources38
- AS6939 Hurricane Electric LLC from 22 sources23
- AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMIT from 4 sources23
- AS396982 Google LLC from 23 sources23
- AS12876 Scaleway SAS from 1 source23
- AS8075 Microsoft Corporation from 21 sources21
- AS209630 LLC Vash Kredit Bank from 1 source12
- AS14061 DigitalOcean, LLC from 3 sources12
- AS20052 Arbor Networks, Inc. from 8 sources11
- AS398324 Censys, Inc. from 9 sources10
Countries
Source addresses (unverified)
| Address | Network | Cc | Sends | Datagrams | Last seen (UTC) |
|---|---|---|---|---|---|
| 62.210.90.215 | AS12876 Scaleway SAS | FR | NetBIOS | 23 | 2026-10-11 00:37 |
| 45.198.224.251 | AS215925 Vpsvault.host Ltd | US | NetBIOS | 19 | 2026-10-10 17:05 |
| 45.205.1.231 | AS215925 Vpsvault.host Ltd | BR | NetBIOS | 19 | 2026-10-10 23:21 |
| 165.154.164.21 | AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMIT | DE | NetBIOS | 13 | 2026-10-08 08:08 |
| 151.243.11.230 | AS209630 LLC Vash Kredit Bank | AE | NetBIOS | 12 | 2026-10-10 04:50 |
| 16.5.0.234 | AS401661 EMBNEX, LLC | BR | NetBIOS | 9 | 2026-10-05 15:55 |
| 190.108.42.138 | AS52308 AGUAS DEL COLORADO SAPEM | AR | NetBIOS | 9 | 2026-10-05 20:39 |
| 185.94.111.1 | AS51115 HLL LLC | RU | NetBIOS | 9 | 2026-10-11 04:00 |
| 185.191.236.38 | AS264617 GRUPO PANAGLOBAL 15 S.A | CH | NetBIOS | 6 | 2026-10-10 22:16 |
| 165.154.36.245 | AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMIT | US | NetBIOS | 5 | 2026-10-08 08:29 |
| 185.36.81.23 | AS209605 UAB Host Baltic | LT | NetBIOS | 5 | 2026-10-09 02:13 |
| 157.230.83.56 | AS14061 DigitalOcean, LLC | US | Unrecognised | 4 | 2026-10-09 17:23 |
| 185.242.226.166 | AS202425 IP Volume inc | US | NetBIOS | 4 | 2026-10-08 12:50 |
| 206.189.14.75 | AS14061 DigitalOcean, LLC | NL | Unrecognised | 4 | 2026-10-07 00:19 |
| 172.104.233.204 | AS63949 Akamai Connected Cloud | DE | NetBIOS | 4 | 2026-10-06 07:39 |
| 137.184.210.250 | AS14061 DigitalOcean, LLC | US | Unrecognised | 4 | 2026-10-05 13:50 |
| 71.6.232.20 | AS10439 CariNet, Inc. | US | NetBIOS | 3 | 2026-10-07 09:01 |
| 178.44.106.19 | AS12389 Rostelecom | RU | NetBIOS | 3 | 2026-10-09 05:36 |
| 152.32.156.136 | AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMIT | IN | NetBIOS | 3 | 2026-10-08 08:06 |
| 117.104.10.130 | AS10010 TOKAI Communications Corporation | JP | NetBIOS | 3 | 2026-10-10 12:35 |
Latest datagrams
payload bytes
00000000 d2 a8 01 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 f9 74 01 00 00 01 00 00 00 00 00 00 20 43 4b 41 |.t.......... CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 21 4d 01 00 00 01 00 00 00 00 00 00 20 43 4b 41 |!M.......... CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 38 f6 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |8........... CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 38 f6 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |8........... CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 38 f6 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |8........... CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 52 17 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |R........... CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 08 91 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|
payload bytes
00000000 e5 d8 00 00 00 01 00 00 00 00 00 00 20 43 4b 41 |............ CKA| 00000010 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 |AAAAAAAAAAAAAAAA| 00000020 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21 |AAAAAAAAAAAAA..!| 00000030 00 01 |..|