""ET EXPLOIT Possible Mirai Infection Attempt via OS Command Injection Outbound (CVE-2021-32305)""

SID: 2033856

Revision: 1

Class Type: attempted-admin

Metadata: created_at 2021_08_31, cve CVE_2021_32305, deployment Perimeter, malware_family Mirai, signature_severity Major, updated_at 2021_08_31, mitre_tactic_id TA0008, mitre_tactic_name Lateral_Movement, mitre_technique_id T1210, mitre_technique_name Exploitation_Of_Remote_Services

Reference:

  • cve

  • 2021-32305

Protocol: tcp

Source Network: [$HOME_NET,$HTTP_SERVERS]

Source Port: any

Destination Network: any

Destination Port: any

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/search.php?search=|22 3b|/bin/bash+wget+http://"

  • Value: "|3b|+"

Within: 50

PCRE: "/\/search.php\?search=\x22\x3b\/bin\/bash+wget+http:\/\/(?:[0-9]{1,3}.){3}[0-9]{1,3}$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

source