Microsoft Exchange Bruteforce Detection Scenario by crowdsecurity | CrowdSec Hub

Microsoft Exchange Bruteforce

Attack scenariopop3/imap:bruteforceMITRE T1110

By: crowdsecurity
Version: 0.4
Name: crowdsecurity/exchange-bf
Remediation: Ban

Detect Exchange bruteforce (SMTP,IMAP,POP3)

Install with a top-level collection

1 collection include it

sudo cscli collections install crowdsecurity/exchange

Installs 10 parsers and 49 scenarios.

View Exchange - Bruteforce Protection →

Installation

sudo cscli scenarios install crowdsecurity/exchange-bf

Then reload CrowdSec: sudo systemctl reload crowdsec

Configuration

Hover a line or a note to see what each field does.

scenarios/crowdsecurity/exchange-bf.yaml· 17 linesGitHub

1type: leaky1
2name: crowdsecurity/exchange-bf
3description: "Detect Exchange bruteforce (SMTP,IMAP,POP3)"
4filter: evt.Meta.service == 'exchange' && evt.Meta.sub_type == 'auth_fail'2
5groupby: evt.Meta.source_ip3
6leakspeed: 10s4
7capacity: 55
8blackhole: 1m6
9labels:
10  confidence: 3
11  spoofable: 0
12  classification:7
13    - attack.T1110
14  behavior: "pop3/imap:bruteforce"
15  label: "Microsoft Exchange Bruteforce"
16  remediation: true8
17  service: exchange

Installed on

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