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[New Rules] [BBR] Windows Deprecated ERs Conversion - 1 (#3131)

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* [New Rules] [BBR] Windows Deprecated ERs Conversion - 1

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* Update defense_evasion_dotnet_clickonce_dfsvc_netcon.toml

* .
This commit is contained in:
Jonhnathan
2023-10-17 11:36:53 -03:00
committed by GitHub
parent 276c0f9cd3
commit 32002fd89b
5 changed files with 425 additions and 0 deletions
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rules_building_block/defense_evasion_collection_masquerading_unusual_archive_file_extension.toml
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[metadata]
creation_date = "2023/09/25"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/25"
bypass_bbr_timing = true
[rule]
author = ["Elastic"]
description = """
Identifies the creation of an archive file with an unusual extension. Attackers may attempt to evade detection by
masquerading files using the file extension values used by image, audio, or document file types.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Archive File with Unusual Extension"
risk_score = 21
rule_id = "cffbaf47-9391-4e09-a83c-1f27d7474826"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Data Source: Elastic Defend", "Rule Type: BBR"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"
query = '''
file where host.os.type == "windows" and event.action != "deletion" and
/* common archive file headers - Rar, 7z, GZIP, MSCF, XZ, ZIP */
file.Ext.header_bytes : ("52617221*", "377ABCAF271C*", "1F8B*", "4d534346*", "FD377A585A00*", "504B0304*", "504B0708*") and
(
/* common image file extensions */
file.extension : ("jpg", "jpeg", "emf", "tiff", "gif", "png", "bmp", "ico", "fpx", "eps", "inf") or
/* common audio and video file extensions */
file.extension : ("mp3", "wav", "avi", "mpeg", "flv", "wma", "wmv", "mov", "mp4", "3gp") or
/* common document file extensions */
(file.extension : ("doc", "docx", "rtf", "ppt", "pptx", "xls", "xlsx") and
/* exclude ZIP file header values for OPENXML documents */
not file.Ext.header_bytes : ("504B0304*", "504B0708*"))
) and
not (process.executable : "?:\\Windows\\System32\\inetsrv\\w3wp.exe" and file.path : "?:\\inetpub\\temp\\IIS Temporary Compressed Files\\*")
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"
[[rule.threat.technique.subtechnique]]
id = "T1036.008"
name = "Masquerade File Type"
reference = "https://attack.mitre.org/techniques/T1036/008/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
rules_building_block/defense_evasion_dotnet_clickonce_dfsvc_netcon.toml
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[metadata]
creation_date = "2023/09/25"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/25"
[rule]
author = ["Elastic"]
description = """
Identifies the execution of DotNet ClickOnce installer via Dfsvc.exe trampoline. Adversaries may take advantage of
ClickOnce to proxy execution of malicious payloads via trusted Microsoft processes.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Execution via Microsoft DotNet ClickOnce Host"
risk_score = 21
rule_id = "5297b7f1-bccd-4611-93fa-ea342a01ff84"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
building_block_type = "default"
type = "eql"
query = '''
sequence by user.id with maxspan=5s
[process where host.os.type == "windows" and event.action == "start" and
process.name : "rundll32.exe" and process.command_line : ("*dfshim*ShOpenVerbApplication*", "*dfshim*#*")]
[network where host.os.type == "windows" and process.name : "dfsvc.exe"]
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1127"
name = "Trusted Developer Utilities Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1127/"
[[rule.threat.technique]]
id = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"
[[rule.threat.technique.subtechnique]]
id = "T1218.011"
name = "Rundll32"
reference = "https://attack.mitre.org/techniques/T1218/011/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
rules_building_block/defense_evasion_injection_from_msoffice.toml
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[metadata]
creation_date = "2023/09/25"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/25"
[rule]
author = ["Elastic"]
description = """
Identifies child processes of frequently targeted Microsoft Office applications (Word, PowerPoint, Excel) with unusual
process arguments and path. This behavior is often observed during exploitation of Office applications or from documents
with malicious macros.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Process Injection from Malicious Document"
risk_score = 21
rule_id = "1c5a04ae-d034-41bf-b0d8-96439b5cc774"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Tactic: Privilege Escalation", "Tactic: Initial Access", "Rule Type: BBR", "Data Source: Elastic Defend"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"
query = '''
process where host.os.type == "windows" and event.action == "start" and
process.parent.name : ("excel.exe", "powerpnt.exe", "winword.exe") and
process.args_count == 1 and
process.executable : (
"?:\\Windows\\SysWOW64\\*.exe", "?:\\Windows\\system32\\*.exe"
) and
not (process.executable : "?:\\Windows\\System32\\spool\\drivers\\x64\\*" and
process.code_signature.trusted == true and not process.code_signature.subject_name : "Microsoft *") and
not process.executable : (
"?:\\Windows\\Sys*\\Taskmgr.exe",
"?:\\Windows\\Sys*\\ctfmon.exe",
"?:\\Windows\\System32\\notepad.exe")
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1055"
name = "Process Injection"
reference = "https://attack.mitre.org/techniques/T1055/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1055"
name = "Process Injection"
reference = "https://attack.mitre.org/techniques/T1055/"
[rule.threat.tactic]
id = "TA0004"
name = "Privilege Escalation"
reference = "https://attack.mitre.org/tactics/TA0004/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1566"
name = "Phishing"
reference = "https://attack.mitre.org/techniques/T1566/"
[[rule.threat.technique.subtechnique]]
id = "T1566.001"
name = "Spearphishing Attachment"
reference = "https://attack.mitre.org/techniques/T1566/001/"
[rule.threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"
rules_building_block/defense_evasion_masquerading_unusual_exe_file_extension.toml
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[metadata]
creation_date = "2023/09/25"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/25"
[rule]
author = ["Elastic"]
description = """
Identifies the creation or modification of an executable file with an unexpected file extension. Attackers may attempt
to evade detection by masquerading files using the file extension values used by image, audio, or document file types.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Executable File with Unusual Extension"
risk_score = 21
rule_id = "ecd4857b-5bac-455e-a7c9-a88b66e56a9e"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"
query = '''
file where host.os.type == "windows" and event.action != "deletion" and
/* MZ header or its common base64 equivalent TVqQ */
file.Ext.header_bytes : ("4d5a*", "54567151*") and
(
/* common image file extensions */
file.extension : ("jpg", "jpeg", "emf", "tiff", "gif", "png", "bmp", "fpx", "eps", "svg", "inf") or
/* common audio and video file extensions */
file.extension : ("mp3", "wav", "avi", "mpeg", "flv", "wma", "wmv", "mov", "mp4", "3gp") or
/* common document file extensions */
file.extension : ("txt", "pdf", "doc", "docx", "rtf", "ppt", "pptx", "xls", "xlsx", "hwp", "html")
) and
not process.pid == 4 and
not process.executable : "?:\\Program Files (x86)\\Trend Micro\\Client Server Security Agent\\Ntrtscan.exe"
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"
[[rule.threat.technique.subtechnique]]
id = "T1036.008"
name = "Masquerade File Type"
reference = "https://attack.mitre.org/techniques/T1036/008/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
rules_building_block/execution_delayed_via_ping_lolbas_unsigned.toml
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[metadata]
creation_date = "2023/09/25"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/25"
bypass_bbr_timing = true
[rule]
author = ["Elastic"]
description = """
Identifies the execution of commonly abused Windows utilities via a delayed Ping execution. This behavior is often
observed during malware installation and is consistent with an attacker attempting to evade detection.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Delayed Execution via Ping"
risk_score = 21
rule_id = "e00b8d49-632f-4dc6-94a5-76153a481915"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Execution", "Tactic: Defense Evasion", "Data Source: Elastic Defend", "Rule Type: BBR"]
type = "eql"
building_block_type = "default"
query = '''
sequence by process.parent.entity_id with maxspan=1m
[process where host.os.type == "windows" and event.action == "start" and process.name : "ping.exe" and
process.args : "-n" and process.parent.name : "cmd.exe" and not user.id : "S-1-5-18"]
[process where host.os.type == "windows" and event.action == "start" and
process.parent.name : "cmd.exe" and
(
process.name : (
"rundll32.exe", "powershell.exe",
"mshta.exe", "msbuild.exe",
"certutil.exe", "regsvr32.exe",
"powershell.exe", "cscript.exe",
"wscript.exe", "wmic.exe",
"installutil.exe", "msxsl.exe",
"Microsoft.Workflow.Compiler.exe",
"ieexec.exe", "iexpress.exe",
"RegAsm.exe", "installutil.exe",
"RegSvcs.exe", "RegAsm.exe"
) or
(process.executable : "?:\\Users\\*\\AppData\\*.exe" and not process.code_signature.trusted == true)
) and
not process.args : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*") and
not (process.name : ("openssl.exe", "httpcfg.exe", "certutil.exe") and process.parent.command_line : "*ScreenConnectConfigurator.cmd*") and
not (process.pe.original_file_name : "DPInst.exe" and process.command_line : "driver\\DPInst_x64 /f ") and
not (process.name : "powershell.exe" and process.args : "Write-Host ======*") and
not (process.name : "wscript.exe" and process.args : "launchquiet_args.vbs" and process.parent.args : "?:\\Windows\\TempInst\\7z*") and
not (process.name : "regsvr32.exe" and process.args : ("?:\\windows\\syswow64\\msxml?.dll", "msxml?.dll", "?:\\Windows\\SysWOW64\\mschrt20.ocx")) and
not (process.name : "wscript.exe" and
process.working_directory :
("?:\\Windows\\TempInst\\*",
"?:\\Users\\*\\AppData\\Local\\Temp\\BackupBootstrapper\\Logs\\",
"?:\\Users\\*\\AppData\\Local\\Temp\\QBTools\\"))
]
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
name = "Command and Scripting Interpreter"
id = "T1059"
reference = "https://attack.mitre.org/techniques/T1059/"
[[rule.threat.technique.subtechnique]]
name = "Visual Basic"
id = "T1059.005"
reference = "https://attack.mitre.org/techniques/T1059/005/"
[[rule.threat.technique.subtechnique]]
name = "PowerShell"
id = "T1059.001"
reference = "https://attack.mitre.org/techniques/T1059/001/"
[rule.threat.tactic]
name = "Execution"
id = "TA0002"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1497"
name = "Virtualization/Sandbox Evasion"
reference = "https://attack.mitre.org/techniques/T1497/"
[[rule.threat.technique.subtechnique]]
name = "Time Based Evasion"
id = "T1497.003"
reference = "https://attack.mitre.org/techniques/T1497/003/"
[[rule.threat.technique]]
name = "System Binary Proxy Execution"
id = "T1218"
reference = "https://attack.mitre.org/techniques/T1218/"
[[rule.threat.technique.subtechnique]]
name = "CMSTP"
id = "T1218.003"
reference = "https://attack.mitre.org/techniques/T1218/003/"
[[rule.threat.technique.subtechnique]]
name = "InstallUtil"
id = "T1218.004"
reference = "https://attack.mitre.org/techniques/T1218/004/"
[[rule.threat.technique.subtechnique]]
name = "Mshta"
id = "T1218.005"
reference = "https://attack.mitre.org/techniques/T1218/005/"
[[rule.threat.technique.subtechnique]]
name = "Regsvcs/Regasm"
id = "T1218.009"
reference = "https://attack.mitre.org/techniques/T1218/009/"
[[rule.threat.technique.subtechnique]]
name = "Regsvr32"
id = "T1218.010"
reference = "https://attack.mitre.org/techniques/T1218/010/"
[[rule.threat.technique.subtechnique]]
name = "Rundll32"
id = "T1218.011"
reference = "https://attack.mitre.org/techniques/T1218/011/"
[[rule.threat.technique]]
name = "System Script Proxy Execution"
id = "T1216"
reference = "https://attack.mitre.org/techniques/T1216/"
[[rule.threat.technique]]
name = "XSL Script Processing"
id = "T1220"
reference = "https://attack.mitre.org/techniques/T1220/"
[rule.threat.tactic]
name = "Defense Evasion"
id = "TA0005"
reference = "https://attack.mitre.org/tactics/TA0005/"