""ET TROJAN Win32/keyzetsu Stealer exfil via Telegram (Response)""

SID: 2044692

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_03_20, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Critical, updated_at 2023_05_30

Reference:

• Link

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

• Value: "|7b 22 6f 6b 22 3a 74 72 75 65 2c 22 72 65 73 75 6c 74 22 3a 7b 22 6d 65 73 73 61 67 65 5f 69 64 22 3a|" Depth: 34

• Value: "|22 75 73 65 72 6e 61 6d 65 22 3a 22 6b 65 79 7a 65 74 73 75 5f 62 6f 74 22 7d|"

Within:

PCRE:

Special Options:

• file_data

• fast_pattern

source