UDP traffic

Datagrams matching port:2137 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.

Clear search

Your plan searches up to 7d, so 30d was shortened. Plans

Datagrams

Source addresses

Networks

Countries

Destination ports

Traffic by type

Service queries

4 datagrams from 4 sources

Requests 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.

NetBIOS 4

Latest NetBIOS datagram, to 2137/udp

NetBIOS node status query *

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                                             |..|

Other services

1 datagrams from 1 source

First packets of sessions with VPN, voice, tunnelling, database and management services.

SOCKS5 1

Latest SOCKS5 datagram, to 2137/udp

·4Vx·

payload bytes

00000000  05 00 ff ff 00 fe fe fe  fe fd fd fd fd 12 34 56  |..............4V|
00000010  78 06 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |x...............|
00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000070  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000080  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

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	2137/udp	4	4	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

2137/udp NetBIOS5

Networks

AS396982 Google LLC from 4 sources4
AS53022 BROSEGHINI LTDA EPP from 1 source1

Countries

Source addresses (unverified)

Address	Network	Cc	Sends	Datagrams	Last seen (UTC)
162.216.150.158	AS396982 Google LLC	US	NetBIOS	1	2026-10-09 03:09
35.203.211.191	AS396982 Google LLC	GB	NetBIOS	1	2026-10-08 12:54
35.203.211.29	AS396982 Google LLC	GB	NetBIOS	1	2026-10-09 10:54
177.221.230.252	AS53022 BROSEGHINI LTDA EPP	BR	SOCKS5	1	2026-10-08 04:39
162.216.150.78	AS396982 Google LLC	US	NetBIOS	1	2026-10-07 22:51

Latest datagrams

2026-10-09 10:54:1935.203.211.29to 2137/udpNetBIOSGB

NetBIOS node status query *

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                                             |..|

2026-10-09 03:09:57162.216.150.158to 2137/udpNetBIOSUS

NetBIOS node status query *

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                                             |..|

2026-10-08 12:54:2935.203.211.191to 2137/udpNetBIOSGB

NetBIOS node status query *

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                                             |..|

2026-10-08 04:39:05177.221.230.252to 2137/udpSOCKS5BR

·4Vx·

payload bytes

00000000  05 00 ff ff 00 fe fe fe  fe fd fd fd fd 12 34 56  |..............4V|
00000010  78 06 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |x...............|
00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000070  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000080  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
... 512 bytes shown in part

2026-10-07 22:51:58162.216.150.78to 2137/udpNetBIOSUS

NetBIOS node status query *

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                                             |..|