""ET WEB_SERVER LEMURLOOT WebShell Interaction Header - X-siLock-Step1 -1 Data Exfil Response - Observed in MOVEit File Transfer - OUTBOUND (Active Compromise)""
SID: 2046050
Revision: 1
Class Type: successful-admin
Metadata: attack_target Web_Server, created_at 2023_06_02, deployment Perimeter, deployment SSLDecrypt, malware_family LEMURLOOT, performance_impact Low, confidence High, signature_severity Critical, tag WebShell, updated_at 2023_06_02
Reference:
Protocol: tcp
Source Network: [$HOME_NET,$HTTP_SERVERS]
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: any
Flow: established,to_client
Contents:
-
Value: "X-siLock-Comment|3a 20|"
-
Value: "AzureBlobStorageAccount|3a 20|"
-
Value: "AzureBlobKey|3a 20|"
-
Value: "AzureBlobContainer|3a 20|"
Within:
PCRE:
Special Options:
-
http_header
-
http_header
-
http_header
-
http_header