UDP traffic
Datagrams matching port:137 sent to HoneyLabs sensors over UDP in the last 24 hours. 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.
37
Datagrams
23
Source addresses
14
Networks
9
Countries
1
Destination ports
Traffic by type
Service queries
37 datagrams from 23 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 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 |..|
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 | 37 | 23 | 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 NetBIOS37
Networks
- AS215925 Vpsvault.host Ltd from 2 sources7
- AS264617 GRUPO PANAGLOBAL 15 S.A from 1 source6
- AS396982 Google LLC from 5 sources5
- AS51115 HLL LLC from 1 source3
- AS12876 Scaleway SAS from 1 source3
- AS8075 Microsoft Corporation from 3 sources3
- AS6939 Hurricane Electric LLC from 3 sources3
- AS401626 Netiface America, Inc. from 1 source1
- AS398324 Censys, Inc. from 1 source1
- AS37061 Safaricom Limited from 1 source1
Countries
Source addresses (unverified)
| Address | Network | Cc | Sends | Datagrams | Last seen (UTC) |
|---|---|---|---|---|---|
| 185.191.236.38 | AS264617 GRUPO PANAGLOBAL 15 S.A | CH | NetBIOS | 6 | 2026-10-10 22:16 |
| 45.205.1.231 | AS215925 Vpsvault.host Ltd | BR | NetBIOS | 4 | 2026-10-10 23:21 |
| 185.94.111.1 | AS51115 HLL LLC | RU | NetBIOS | 3 | 2026-10-11 04:00 |
| 45.198.224.251 | AS215925 Vpsvault.host Ltd | US | NetBIOS | 3 | 2026-10-10 17:05 |
| 62.210.90.215 | AS12876 Scaleway SAS | FR | NetBIOS | 3 | 2026-10-11 00:37 |
| 66.132.172.236 | AS398324 Censys, Inc. | US | NetBIOS | 1 | 2026-10-10 16:56 |
| 146.88.241.20 | AS20052 Arbor Networks, Inc. | US | NetBIOS | 1 | 2026-10-11 04:42 |
| 193.46.255.155 | AS47890 Unmanaged Ltd | RO | NetBIOS | 1 | 2026-10-10 09:35 |
| 52.165.83.239 | AS8075 Microsoft Corporation | US | NetBIOS | 1 | 2026-10-10 08:40 |
| 117.104.10.130 | AS10010 TOKAI Communications Corporation | JP | NetBIOS | 1 | 2026-10-10 12:35 |
| 71.209.151.179 | AS209 CenturyLink Communications, LLC | US | NetBIOS | 1 | 2026-10-10 21:45 |
| 65.49.1.36 | AS6939 Hurricane Electric LLC | US | NetBIOS | 1 | 2026-10-11 02:39 |
| 197.248.79.21 | AS37061 Safaricom Limited | KE | NetBIOS | 1 | 2026-10-10 09:39 |
| 205.210.31.185 | AS396982 Google LLC | US | NetBIOS | 1 | 2026-10-10 19:40 |
| 198.235.24.59 | AS396982 Google LLC | US | NetBIOS | 1 | 2026-10-10 22:22 |
| 147.185.132.237 | AS396982 Google LLC | US | NetBIOS | 1 | 2026-10-10 22:20 |
| 20.118.237.159 | AS8075 Microsoft Corporation | US | NetBIOS | 1 | 2026-10-10 08:36 |
| 64.62.156.32 | AS6939 Hurricane Electric LLC | US | NetBIOS | 1 | 2026-10-11 02:55 |
| 147.185.132.57 | AS396982 Google LLC | US | NetBIOS | 1 | 2026-10-10 06:30 |
| 217.60.76.179 | AS401626 Netiface America, Inc. | AE | NetBIOS | 1 | 2026-10-10 15:54 |
Latest datagrams
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 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 |..|