""ET TROJAN Win32/Umbral-Stealer CnC Exfil via Discord (POST)""
SID: 2045593
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 2023_05_04, deployment Perimeter, deployment SSLDecrypt, malware_family UmbralStealer, confidence High, signature_severity Major, updated_at 2023_05_04
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "POST"
-
Value: "discord.com|0d 0a|"
-
Value: "|7b 22|title|22 3a 22|Umbral|20|Stealer|22 2c 22|description|22 3a 22|"
-
Value: "|22 2a 2a 5f 5f|System|20|Info|5f 5f 2a 2a 5c|r|5c|n"
-
Value: "|5c|r|5c|n|5c|r|5c|n|2a 2a 5f 5f|Grabbed|20|Data|5f 5f 2a 2a 5c|r|5c|n|60 60 60|"
Within:
PCRE: "/Host\x3a\x20[^\r\n]+discord.com/Hmi"
Special Options:
-
http_method
-
http_header
-
file_data