""ET INFO 404/Snake/Matiex Keylogger Style External IP Check""
SID: 2039190
Revision: 4
Class Type: misc-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_13, deployment Perimeter, malware_family 404Keylogger, signature_severity Informational, updated_at 2023_05_24
Reference:
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md5
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017e7b6b886cce51eb03ce097c1a4c80
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "GET"
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Value: "User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.2|3b 20|.NET CLR1.0.3705|3b|)|0d 0a|Host|3a 20|checkip.dyndns.org|0d 0a|Connection|3a 20|Keep-Alive|0d 0a 0d 0a|"
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Value: "|0d 0a|Host|3a 20|checkip.dyndns.org|0d 0a|"
Within:
PCRE: "/^User-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nConnection\x3a\x20[^\r\n]+\r\n\r\n$/Hmi"
Special Options:
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http_method
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http_header
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fast_pattern
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http_header