""ET TROJAN Bamital Headers - Likely CnC Beacon""
SID: 2019755
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2014_11_20, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_11_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "User-Agent|3a 20|Mozilla/5.0 (compatible|3b| MSIE 9.0|3b| Windows NT 6.1|3b| WOW64|3b| Trident/5.0)"
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Value: !"Referer|3a|"
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Value: !"Accept-"
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Value: "Host|3a|" Depth: 5
Within:
PCRE: "/^Host\x3a[^\r\n]+\r\nAccept\x3a[^\r\n]+\r\nConnection\x3a[^\r\n]+\r\n(?:Pragma|Cache-Control)\x3a[^\r\n]+\r\nUser-Agent\x3a[^\r\n]+\r?$/Hsmi"
Special Options:
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http_header
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http_header
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http_header
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http_header