""ET TROJAN W32/Quasar 1.3/Venom RAT Connectivity Check 2""

SID: 2036859

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_07, deployment Perimeter, malware_family Qasar_Rat, malware_family VoidRat, signature_severity Major, updated_at 2016_12_07

Reference:

  • md5

  • 69aeb53d5d8792e5479966aeed917bc4

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/xml/"

  • Value: "User-Agent|3a 20|Mozilla/5.0 (Windows NT 6.3|3b| rv|3a|48.0) Gecko/20100101 Firefox/48.0"

  • Value: "Host|3a 20|freegeoip.net|0d 0a|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nConnection\x3a\x20Keep-Alive[\r\n]*$/H"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

source