Detection rules › Splunk
Potential network connection with CVE-2023-21554 (Sysmon)
Exploitation of CVE-2023-21554 (aka. QueueJumper), allow unauthorized attackers to remotely execute arbitrary code in the context of the Windows service process mqsvc.exe by reaching the TCP port 1801.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Lateral Movement | T1210 Exploitation of Remote Services |
References
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 3 | Network connection |
Rule body yaml
id: '17539.28699'
title: Potential network connection with CVE-2023-21554
description: Exploitation of CVE-2023-21554 (aka. QueueJumper), allow unauthorized
attackers to remotely execute arbitrary code in the context of the Windows service
process mqsvc.exe by reaching the TCP port 1801.
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_sysmon` (TERM(EventCode=3) OR "EventID>3<")
"1801" "MQSVC" | table _time, host, user, signature_id, process, process_*, parent_process_*,
src_ip, dest_ip | bin span=1s | stats values(*) as * by _time, host '
techniques:
- lateral-movement:exploitation of remote services
technique_id:
- T1210
data_category:
- Windows Sysmon
references:
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1048.003/T1048.003.md
- https://socfortress.medium.com/data-exfiltration-using-icmp-and-how-to-detect-it-69a799cca234
Stages and Predicates
Stage 1: search
`get_endpoint_data` `get_endpoint_data_sysmon` (TERM(EventCode=3) OR "EventID>3<") "1801" "MQSVC"
Stage 2: table
| table _time, host, user, signature_id, process, process_*, parent_process_*, src_ip, dest_ip
Stage 3: bucket
| bin span=1s
Stage 4: stats
| stats values(*) as * by _time, host
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
EventCode | eq |
|
Search terms
Bare-string tokens in the SPL search body. Splunk matches each token against _raw (the untyped raw event text) anywhere it appears, not against a specific field. These don't surface in the Indicators table because they aren't predicates on a known field.
| Stage | Term |
|---|---|
| 1 | TERM |
| 1 | "EventID>3<" |
| 1 | "1801" |
| 1 | "MQSVC" |