""ET TROJAN Atom Logger exfil via SMTP""

SID: 2026825

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 2019_01_17, deployment Perimeter, malware_family AtomLogger, performance_impact Moderate, signature_severity Critical, updated_at 2023_05_30

Reference:

  • md5

  • 78bd897a638e7c0d3c00c31c8c68f18b

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: [25,587]

Flow: established,to_server

Contents:

  • Value: "Subject|3a 20|["

  • Value: "|20 7c 20|Atom Logger"

Within: 100

PCRE:

Special Options:

  • fast_pattern

source