""ET TROJAN Possible Inbound PowerShell via Invoke-PSImage Stego""
SID: 2027085
Revision: 2
Class Type: trojan-activity
Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2019_03_18, deployment Perimeter, performance_impact Moderate, signature_severity Minor, updated_at 2019_03_18
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HOME_NET
Destination Port: any
Flow: established,to_client
Contents:
-
Value: "|89 50 4e 47|" Depth: 8
-
Value: "c2FsIGEgTmV3LU9iamVjdDt"
Within: 75
PCRE:
Special Options:
-
file_data
-
fast_pattern