Halfbaked Command and Control Beacon

 1[metadata]
 2creation_date = "2020/07/06"
 3integration = ["network_traffic"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.3.0"
 7updated_date = "2023/10/16"
 8
 9[rule]
10author = ["Elastic"]
11description = """
12Halfbaked is a malware family used to establish persistence in a contested network. This rule detects a network activity
13algorithm leveraged by Halfbaked implant beacons for command and control.
14"""
15false_positives = [
16    """
17    This rule should be tailored to exclude systems, either as sources or destinations, in which this behavior is
18    expected.
19    """,
20]
21from = "now-9m"
22index = ["packetbeat-*", "auditbeat-*", "filebeat-*", "logs-network_traffic.*"]
23language = "lucene"
24license = "Elastic License v2"
25name = "Halfbaked Command and Control Beacon"
26note = """## Threat intel
27
28This activity has been observed in FIN7 campaigns."""
29references = [
30    "https://www.fireeye.com/blog/threat-research/2017/04/fin7-phishing-lnk.html",
31    "https://attack.mitre.org/software/S0151/",
32]
33risk_score = 73
34rule_id = "2e580225-2a58-48ef-938b-572933be06fe"
35severity = "high"
36tags = ["Use Case: Threat Detection", "Tactic: Command and Control", "Domain: Endpoint"]
37timestamp_override = "event.ingested"
38type = "query"
39
40query = '''
41(event.dataset: (network_traffic.tls OR network_traffic.http) OR
42  (event.category: (network OR network_traffic) AND network.protocol: http)) AND
43  network.transport:tcp AND url.full:/http:\/\/[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}\/cd/ AND
44  destination.port:(53 OR 80 OR 8080 OR 443)
45'''
46
47
48[[rule.threat]]
49framework = "MITRE ATT&CK"
50[[rule.threat.technique]]
51id = "T1071"
52name = "Application Layer Protocol"
53reference = "https://attack.mitre.org/techniques/T1071/"
54
55[[rule.threat.technique]]
56id = "T1568"
57name = "Dynamic Resolution"
58reference = "https://attack.mitre.org/techniques/T1568/"
59[[rule.threat.technique.subtechnique]]
60id = "T1568.002"
61name = "Domain Generation Algorithms"
62reference = "https://attack.mitre.org/techniques/T1568/002/"
63
64
65
66[rule.threat.tactic]
67id = "TA0011"
68name = "Command and Control"
69reference = "https://attack.mitre.org/tactics/TA0011/"