""ET TROJAN JS/Comm100 Trojan Backdoor Inbound""

SID: 2039089

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_10_04, deployment Perimeter, signature_severity Major, updated_at 2023_04_19, reviewed_at 2024_01_26

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: "200"

• Value: "Content|2d|Type|3a 20|application|2f|javascript|0d 0a|"

• Value: "|28 28 29 3d 3e 7b|var" Depth: 11

• Value: "|3d 5b 22 22 2c 22|split|22 2c 22|"

• Value: "indexOf|22 2c 22 22 2c 22 22 2c 22 2e 22 2c 22|pow|22 2c 22|reduce|22 2c 22|reverse|22 2c 22|0|22 5d|"

Within:

PCRE:

Special Options:

• http_stat_code

• http_header

• file_data

• fast_pattern

source