""ET TROJAN Observed TA399/Sidewinder APT Domain (efes-mindef-gov-pk .dowmload .org in TLS SNI)""

SID: 2055128

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2024_08_08, deployment Perimeter, signature_severity Major, tag Sidewinder, tag TA399, updated_at 2024_08_08

Reference:

  • md5

  • 43d35b5b20f491be219ab2eaa172ec55

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|"

  • Value: "|01|"

  • Value: "|00 00|"

  • Value: "|00|"

  • Value: "efes-mindef-gov-pk.dowmload.org"

Within: 1

PCRE: "/^(?:\x00\x1f|.\x2e)efes-mindef-gov-pk.dowmload.org/R"

Special Options:

source