Jonhnathan
74222f86eb
* [New Rules] [BBR] Windows Deprecated ERs Conversion - 3 * Update defense_evasion_invalid_codesign_imageload.toml * Update defense_evasion_invalid_codesign_imageload.toml * Update rules_building_block/initial_access_execution_remote_via_msiexec.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> * Update rules_building_block/initial_access_xsl_script_execution_via_com.toml Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> * Update rules_building_block/initial_access_execution_remote_via_msiexec.toml Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> --------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
95 lines
3.9 KiB
TOML
95 lines
3.9 KiB
TOML
[metadata]
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creation_date = "2023/09/28"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2023/09/28"
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bypass_bbr_timing = true
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the execution of the built-in Windows Installer, msiexec.exe, to install a remote package. Adversaries may abuse
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msiexec.exe to launch local or network accessible MSI files.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Remote File Execution via MSIEXEC"
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risk_score = 21
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rule_id = "3e441bdb-596c-44fd-8628-2cfdf4516ada"
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severity = "low"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Initial Access", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
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building_block_type = "default"
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type = "eql"
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query = '''
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sequence with maxspan=1m
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[process where host.os.type == "windows" and event.action == "start" and
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process.name : "msiexec.exe" and process.args : "/V"] by process.entity_id
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[network where host.os.type == "windows" and process.name : "msiexec.exe" and
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event.action == "connection_attempted"] by process.entity_id
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[process where host.os.type == "windows" and event.action == "start" and
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process.parent.name : "msiexec.exe" and user.id : ("S-1-5-21-*", "S-1-5-12-1-*") and
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not process.executable : ("?:\\Windows\\SysWOW64\\msiexec.exe",
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"?:\\Windows\\System32\\msiexec.exe",
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"?:\\Windows\\System32\\srtasks.exe",
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"?:\\Windows\\SysWOW64\\srtasks.exe",
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"?:\\Windows\\System32\\taskkill.exe",
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"?:\\Windows\\Installer\\MSI*.tmp",
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"?:\\Program Files\\*.exe",
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"?:\\Program Files (x86)\\*.exe",
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"?:\\Windows\\System32\\ie4uinit.exe",
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"?:\\Windows\\SysWOW64\\ie4uinit.exe",
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"?:\\Windows\\System32\\sc.exe",
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"?:\\Windows\\system32\\Wbem\\mofcomp.exe",
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"?:\\Windows\\twain_32\\fjscan32\\SOP\\crtdmprc.exe",
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"?:\\Windows\\SysWOW64\\taskkill.exe",
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"?:\\Windows\\SysWOW64\\schtasks.exe",
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"?:\\Windows\\system32\\schtasks.exe",
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"?:\\Windows\\System32\\sdbinst.exe") and
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not (process.code_signature.subject_name == "Citrix Systems, Inc." and process.code_signature.trusted == true) and
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not (process.name : ("regsvr32.exe", "powershell.exe", "rundll32.exe", "wscript.exe") and
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process.Ext.token.integrity_level_name == "high" and
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process.args : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*")) and
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not (process.executable : ("?:\\Program Files\\*.exe", "?:\\Program Files (x86)\\*.exe") and process.code_signature.trusted == true) and
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not (process.name : "rundll32.exe" and process.args : "printui.dll,PrintUIEntry")
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] by process.parent.entity_id
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1566"
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name = "Phishing"
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reference = "https://attack.mitre.org/techniques/T1566/"
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[[rule.threat.technique.subtechnique]]
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id = "T1566.002"
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name = "Spearphishing Link"
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reference = "https://attack.mitre.org/techniques/T1566/002/"
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[rule.threat.tactic]
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id = "TA0001"
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name = "Initial Access"
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reference = "https://attack.mitre.org/tactics/TA0001/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1218"
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name = "System Binary Proxy Execution"
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reference = "https://attack.mitre.org/techniques/T1218/"
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[[rule.threat.technique.subtechnique]]
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id = "T1218.007"
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name = "Msiexec"
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reference = "https://attack.mitre.org/techniques/T1218/007/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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