blog/source/_posts/urlhaus-phishing-snort-suricata.md

title	excerpt	date	tags
urlhaus-filter and phishing-filter available as Snort and Suricata rules	Tested on Snort 2, Snort 3 and Suricata 6	2021-03-20	security

urlhaus-filter and phishing-filter are blocklists that target malware and phishing websites respectively. The blocklists are available in many formats:

• uBlock Origin (urlhaus-filter is bundled by default)
• Pi-hole
• AdGuard Home
• AdGuard (browser extension)
• Vivaldi 3.3+
• Hosts file
• Dnsmasq
• BIND
• Unbound
• IE9+

In addition to the above formats/software, they are now also available as Snort and Suricata IDS rulesets. Both Snort 2 and 3 are supported; a vast majority of Linux distribution have not support v3 yet and there are no official v3 binaries. Note that Snort 2 ruleset is not compatible with Snort 3 and vice versa.

I planned to create these IDS rulesets for a long time, but held it off because upstream URLhaus already support them and there was no user request. I finally decided to go for it after the product announcement of AWS Firewall with its support of custom Suricata ruleset, plus incomplete support of URLhaus on Snort 2 ruleset.

Installation guide as follow.

urlhaus-filter

Snort2

# Download ruleset
curl -L "https://curben.gitlab.io/malware-filter/urlhaus-filter-snort2-online.rules" -o "/etc/snort/rules/urlhaus-filter-snort2-online.rules"

# Create a new cron job for daily update
printf '#!/bin/sh\ncurl -L "https://curben.gitlab.io/malware-filter/urlhaus-filter-snort2-online.rules" -o "/etc/snort/rules/urlhaus-filter-snort2-online.rules"\n' > /etc/cron.daily/urlhaus-filter

# cron job requires execution permission
chmod 755 /etc/cron.daily/urlhaus-filter

# Configure Snort to use the ruleset
printf "\ninclude \$RULE_PATH/urlhaus-filter-snort2-online.rules\n" >> /etc/snort/snort.conf

Snort3

# Download ruleset
curl -L "https://curben.gitlab.io/malware-filter/urlhaus-filter-snort3-online.rules" -o "/etc/snort/rules/urlhaus-filter-snort3-online.rules"

# Create a new cron job for daily update
printf '#!/bin/sh\ncurl -L "https://curben.gitlab.io/malware-filter/urlhaus-filter-snort3-online.rules" -o "/etc/snort/rules/urlhaus-filter-snort3-online.rules"\n' > /etc/cron.daily/urlhaus-filter

# cron job requires execution permission
chmod 755 /etc/cron.daily/urlhaus-filter

Configure Snort to use the ruleset:

ips =
{
  variables = default_variables,
+  include = 'rules/urlhaus-filter-snort3-online.rules'
}

Suricata

# Download ruleset
curl -L "https://curben.gitlab.io/malware-filter/urlhaus-filter-suricata-online.rules" -o "/etc/suricata/rules/urlhaus-filter-suricata-online.rules"

# Create a new cron job for daily update
printf '#!/bin/sh\ncurl -L "https://curben.gitlab.io/malware-filter/urlhaus-filter-suricata-online.rules" -o "/etc/suricata/rules/urlhaus-filter-suricata-online.rules"\n' > /etc/cron.daily/urlhaus-filter

# cron job requires execution permission
chmod 755 /etc/cron.daily/urlhaus-filter

Configure Suricata to use the ruleset:

rule-files:
  - local.rules
+  - urlhaus-filter-suricata-online.rules

phishing-filter

Snort2

# Download ruleset
curl -L "https://curben.gitlab.io/phishing-filter-mirror/phishing-filter-snort2.rules" -o "/etc/snort/rules/phishing-filter-snort2.rules"

# Create a new cron job for daily update
printf '#!/bin/sh\ncurl -L "https://curben.gitlab.io/phishing-filter-mirror/phishing-filter-snort2.rules" -o "/etc/snort/rules/phishing-filter-snort2.rules"\n' > /etc/cron.daily/phishing-filter

# cron job requires execution permission
chmod 755 /etc/cron.daily/phishing-filter

# Configure Snort to use the ruleset
printf "\ninclude \$RULE_PATH/phishing-filter-snort2.rules\n" >> /etc/snort/snort.conf

Snort3

# Download ruleset
curl -L "https://curben.gitlab.io/phishing-filter-mirror/phishing-filter-snort3.rules" -o "/etc/snort/rules/phishing-filter-snort3.rules"

# Create a new cron job for daily update
printf '#!/bin/sh\ncurl -L "https://curben.gitlab.io/phishing-filter-mirror/phishing-filter-snort3.rules" -o "/etc/snort/rules/phishing-filter-snort3.rules"\n' > /etc/cron.daily/phishing-filter

# cron job requires execution permission
chmod 755 /etc/cron.daily/phishing-filter

Configure Snort to use the ruleset:

ips =
{
  variables = default_variables,
+  include = 'rules/phishing-filter-snort3-online.rules'
}

Suricata

# Download ruleset
curl -L "https://curben.gitlab.io/phishing-filter-mirror/phishing-filter-suricata.rules" -o "/etc/suricata/rules/phishing-filter-suricata.rules"

# Create a new cron job for daily update
printf '#!/bin/sh\ncurl -L "https://curben.gitlab.io/phishing-filter-mirror/phishing-filter-suricata.rules" -o "/etc/suricata/rules/phishing-filter-suricata.rules"\n' > /etc/cron.daily/phishing-filter

# cron job requires execution permission
chmod 755 /etc/cron.daily/phishing-filter

Configure Suricata to use the ruleset:

rule-files:
  - local.rules
+  - phishing-filter-suricata.rules