""ET TROJAN ReVBShell Command Response""

SID: 2036636

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_05_19, deployment Perimeter, malware_family ReVBShell, performance_impact Low, signature_severity Major, updated_at 2022_05_19

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/cmd"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name=|22|cmd|22|"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name=|22|result|22 3b 20|filename=|22|cmdoutput|22|"

Within:

PCRE: "/^Connection\x3a\x20[^\r\n]+\r\nContent-Type\x3a\x20[^\r\n]+\r\nAccept\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nContent-Length\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

source