""ET TROJAN Win32/Grandoreiro TCP CnC Activity""
SID: 2044346
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_02_27, deployment Perimeter, malware_family Grandoreiro, performance_impact Moderate, confidence High, signature_severity Major, tag RAT, updated_at 2023_02_27
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: any
Flow: established,to_server
Contents:
-
Value: "/GET|20|" Depth: 5
-
Value: "|0d 0a|HOST|3a 20|"
Within:
PCRE: "/^\/GET\s[A-F0-9]{30,400}\sHTTP\/1.1\r\nH[Oo][Ss][Tt]\x3a\x20[^\r\n]+[\r\n]+$/"
Special Options:
-
fast_pattern
-
nocase