""ET TROJAN Suspected REDCURL CnC Activity M2""

SID: 2030689

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_08_17, deployment Perimeter, deployment SSLDecrypt, performance_impact Moderate, signature_severity Major, updated_at 2020_08_17

Reference:

  • md5

  • 12ec7e6876dc86f158f448ebfba9e0eb

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "HEAD"

  • Value: "|0d 0a|User-Agent|3a 20|curl/"

  • Value: ".jpg HTTP/1.1|0d 0a|Host|3a 20|"

  • Value: !"Referer"

Within:

PCRE: "/^Host[^\r\n]+\r\nUser-Agent[^\r\n]+\r\nAccept[^\r\n]+\r\n(?:\r\n)?$/H"

Special Options:

  • http_method

  • http_header

  • fast_pattern

  • http_header

source