""ET TROJAN Possible Win32/Hupigon ip.txt with a Non-Mozilla UA""

SID: 2016950

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_05_31, deployment Perimeter, malware_family Hupigon, confidence Low, signature_severity Major, updated_at 2023_09_29, reviewed_at 2023_09_29

Reference:

  • md5

  • 4d23395fcbab1dabef9afe6af81df558

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "/ip.txt"

  • Value: "User-Agent|3a 20|" Depth: 12

  • Value: "|3a 20|no-cache|0d 0a 0d 0a|"

  • Value: !"%E5%A4%A7%E4%BC%97%E7%82%B9%E8%AF%84"

  • Value: !"malwaredomainlist.com"

Within:

PCRE: "/^User-Agent\x3a(?!\x20Mozilla\/)[^\r\n]+[\r\n]+Host\x3a\x20[^\r\n]+\r\n(?:Cache-Control|Pragma)\x3a\x20no-cache[\r\n]+$/H"

Special Options:

  • http_uri

  • nocase

  • http_header

  • http_header

  • http_header

  • http_header

source