""ET TROJAN [PTsecurity] WeChat (Ransomware/Stealer) HttpHeader""

SID: 2026688

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 2018_12_05, deployment Perimeter, malware_family Ransomware, malware_family Stealer, signature_severity Major, tag Ransomware, updated_at 2018_12_05, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "AAAAAA"

  • Value: "Accept|3a 20|/" Depth: 11

  • Value: "Accept-Encoding|3a 20|gzip, deflate"

  • Value: "User-Agent|3a 20|Mozilla/4.0 (compatible|3b| MSIE 7.0|3b| Windows NT 6.1|3b| WOW64|3b| Trident/4.0|3b| SLCC2|3b| .NET CLR 2.0.50727|3b| .NET CLR 3.5.30729|3b| .NET CLR 3.0.30729|3b| Media Center PC 6.0|3b| .NET4.0C|3b| .NET4.0E)"

  • Value: "Host|3a 20|r.photo.store.qq.com"

  • Value: "Connection|3a 20|Keep-Alive"

  • Value: !"Referer|3a|"

Within: 24

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_header

  • http_header

  • fast_pattern

  • http_header

  • http_header

source