""ET TROJAN Win32/Cobalt Strike CnC Activity M1""
SID: 2050421
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2024_01_24, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2024_01_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "GET"
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Value: "|0d 0a|Connection|3a 20|Keep-Alive|0d 0a|Cache|2d|Control|3a 20|no|2d|cache|0d 0a|"
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Value: "User-Agent|3a 20|Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|8|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|Trident|2f|4|2e|0|3b 20|LBBROWSER|29 0d 0a|"
Within:
PCRE: "/Accept\x3a\x20[^\r\n]+\r\nCookie\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nConnection\x3a\x20[^\r\n]+\r\nCache-Control\x0d\x0a\x0d\x0a/H"
Special Options:
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http_method
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http_header
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http_header