""ET MALWARE NivesroCheat CnC Activity M2""

SID: 2033222

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_02, deployment Perimeter, signature_severity Major, tag c2, updated_at 2021_07_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 6aaa1742b89bd72be6ee50709fc457ab

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "version.php?a="

  • Value: !"&"

  • Value: "Accept|3a 20|text/*|0d 0a|"

Within:

PCRE: "/^Accept\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\n/H"

Special Options:

  • fast_pattern

  • http_uri

  • http_uri

  • http_header

source