""ET TROJAN Win32/APT28 Host Fingerprint Exfiltration via IMAP""

SID: 2037090

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_22, deployment Perimeter, signature_severity Major, updated_at 2022_06_22

Reference:

• md5

• d3bddb5de864afd7e4f5e56027f4e5ea

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 143

Flow: established,to_server

Contents:

• Value: "|24 20|APPEND|20|INBOX|20 7b|" Depth: 16

• Value: "M_report|0d 0a|"

Within: 10

PCRE: "/Subject\x3a[0-9]{1,2}\x2f[0-9]{1,2}\x2f[0-9]{4}\x20[0-9]{1,2}\x3a[0-9]{1,2}\x3a[0-9]{2}\x20[AP]/R"

Special Options:

• fast_pattern

source