atomic-threat-coverage/Atomic_Threat_Coverage/Detection_Rules/sysmon_mal_namedpipes.md

Title	Malicious Named Pipe
Description	Detects the creation of a named pipe used by known APT malware
ATT&CK Tactic	TA0005: Defense Evasion TA0004: Privilege Escalation
ATT&CK Technique	T1055: Process Injection
Data Needed	DN_0020_17_windows_sysmon_PipeEvent DN_0021_18_windows_sysmon_PipeEvent
Trigger	T1055: Process Injection
Severity Level	critical
False Positives	Unkown
Development Status	experimental
References	[Various sources](Various sources)
Author	Florian Roth

Detection Rules

Sigma rule

title: Malicious Named Pipe
id: fe3ac066-98bb-432a-b1e7-a5229cb39d4a
status: experimental
description: Detects the creation of a named pipe used by known APT malware
references:
    - Various sources
date: 2017/11/06
author: Florian Roth
logsource:
   product: windows
   service: sysmon
   definition: 'Note that you have to configure logging for PipeEvents in Symson config'
detection:
   selection:
      EventID: 
         - 17
         - 18
      PipeName: 
         - '\isapi_http'  # Uroburos Malware Named Pipe
         - '\isapi_dg'  # Uroburos Malware Named Pipe
         - '\isapi_dg2'  # Uroburos Malware Named Pipe
         - '\sdlrpc'  # Cobra Trojan Named Pipe http://goo.gl/8rOZUX
         - '\ahexec'  # Sofacy group malware
         - '\winsession'  # Wild Neutron APT malware https://goo.gl/pivRZJ
         - '\lsassw'  # Wild Neutron APT malware https://goo.gl/pivRZJ
         - '\46a676ab7f179e511e30dd2dc41bd388'  # Project Sauron https://goo.gl/eFoP4A
         - '\9f81f59bc58452127884ce513865ed20'  # Project Sauron https://goo.gl/eFoP4A
         - '\e710f28d59aa529d6792ca6ff0ca1b34'  # Project Sauron https://goo.gl/eFoP4A
         - '\rpchlp_3'  # Project Sauron https://goo.gl/eFoP4A - Technical Analysis Input
         - '\NamePipe_MoreWindows'  # Cloud Hopper Annex B https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf, US-CERT Alert - RedLeaves https://www.us-cert.gov/ncas/alerts/TA17-117A
         - '\pcheap_reuse'  # Pipe used by Equation Group malware 77486bb828dba77099785feda0ca1d4f33ad0d39b672190079c508b3feb21fb0
         - '\msagent_*'  # CS default named pipes https://github.com/Neo23x0/sigma/issues/253
         - '\gruntsvc' # Covenant default named pipe
         # - '\status_*'  # CS default named pipes https://github.com/Neo23x0/sigma/issues/253
   condition: selection
tags:
    - attack.defense_evasion
    - attack.privilege_escalation
    - attack.t1055
falsepositives:
   - Unkown
level: critical

powershell

Get-WinEvent -LogName Microsoft-Windows-Sysmon/Operational | where {(($_.ID -eq "17" -or $_.ID -eq "18") -and ($_.message -match "\\\\isapi_http" -or $_.message -match "\\\\isapi_dg" -or $_.message -match "\\\\isapi_dg2" -or $_.message -match "\\\\sdlrpc" -or $_.message -match "\\\\ahexec" -or $_.message -match "\\\\winsession" -or $_.message -match "\\\\lsassw" -or $_.message -match "\\\\46a676ab7f179e511e30dd2dc41bd388" -or $_.message -match "\\\\9f81f59bc58452127884ce513865ed20" -or $_.message -match "\\\\e710f28d59aa529d6792ca6ff0ca1b34" -or $_.message -match "\\\\rpchlp_3" -or $_.message -match "\\\\NamePipe_MoreWindows" -or $_.message -match "\\\\pcheap_reuse" -or $_.message -match "PipeName.*\\\\msagent_.*" -or $_.message -match "\\\\gruntsvc")) } | select TimeCreated,Id,RecordId,ProcessId,MachineName,Message

es-qs

(winlog.channel:"Microsoft\\-Windows\\-Sysmon\\/Operational" AND winlog.event_id:("17" OR "18") AND winlog.event_data.PipeName.keyword:(\\\\isapi_http OR \\\\isapi_dg OR \\\\isapi_dg2 OR \\\\sdlrpc OR \\\\ahexec OR \\\\winsession OR \\\\lsassw OR \\\\46a676ab7f179e511e30dd2dc41bd388 OR \\\\9f81f59bc58452127884ce513865ed20 OR \\\\e710f28d59aa529d6792ca6ff0ca1b34 OR \\\\rpchlp_3 OR \\\\NamePipe_MoreWindows OR \\\\pcheap_reuse OR \\\\msagent_* OR \\\\gruntsvc))

xpack-watcher

curl -s -XPUT -H \'Content-Type: application/json\' --data-binary @- localhost:9200/_watcher/watch/fe3ac066-98bb-432a-b1e7-a5229cb39d4a <<EOF\n{\n  "metadata": {\n    "title": "Malicious Named Pipe",\n    "description": "Detects the creation of a named pipe used by known APT malware",\n    "tags": [\n      "attack.defense_evasion",\n      "attack.privilege_escalation",\n      "attack.t1055"\n    ],\n    "query": "(winlog.channel:\\"Microsoft\\\\-Windows\\\\-Sysmon\\\\/Operational\\" AND winlog.event_id:(\\"17\\" OR \\"18\\") AND winlog.event_data.PipeName.keyword:(\\\\\\\\isapi_http OR \\\\\\\\isapi_dg OR \\\\\\\\isapi_dg2 OR \\\\\\\\sdlrpc OR \\\\\\\\ahexec OR \\\\\\\\winsession OR \\\\\\\\lsassw OR \\\\\\\\46a676ab7f179e511e30dd2dc41bd388 OR \\\\\\\\9f81f59bc58452127884ce513865ed20 OR \\\\\\\\e710f28d59aa529d6792ca6ff0ca1b34 OR \\\\\\\\rpchlp_3 OR \\\\\\\\NamePipe_MoreWindows OR \\\\\\\\pcheap_reuse OR \\\\\\\\msagent_* OR \\\\\\\\gruntsvc))"\n  },\n  "trigger": {\n    "schedule": {\n      "interval": "30m"\n    }\n  },\n  "input": {\n    "search": {\n      "request": {\n        "body": {\n          "size": 0,\n          "query": {\n            "bool": {\n              "must": [\n                {\n                  "query_string": {\n                    "query": "(winlog.channel:\\"Microsoft\\\\-Windows\\\\-Sysmon\\\\/Operational\\" AND winlog.event_id:(\\"17\\" OR \\"18\\") AND winlog.event_data.PipeName.keyword:(\\\\\\\\isapi_http OR \\\\\\\\isapi_dg OR \\\\\\\\isapi_dg2 OR \\\\\\\\sdlrpc OR \\\\\\\\ahexec OR \\\\\\\\winsession OR \\\\\\\\lsassw OR \\\\\\\\46a676ab7f179e511e30dd2dc41bd388 OR \\\\\\\\9f81f59bc58452127884ce513865ed20 OR \\\\\\\\e710f28d59aa529d6792ca6ff0ca1b34 OR \\\\\\\\rpchlp_3 OR \\\\\\\\NamePipe_MoreWindows OR \\\\\\\\pcheap_reuse OR \\\\\\\\msagent_* OR \\\\\\\\gruntsvc))",\n                    "analyze_wildcard": true\n                  }\n                }\n              ],\n              "filter": {\n                "range": {\n                  "timestamp": {\n                    "gte": "now-30m/m"\n                  }\n                }\n              }\n            }\n          }\n        },\n        "indices": [\n          "winlogbeat-*"\n        ]\n      }\n    }\n  },\n  "condition": {\n    "compare": {\n      "ctx.payload.hits.total": {\n        "not_eq": 0\n      }\n    }\n  },\n  "actions": {\n    "send_email": {\n      "throttle_period": "15m",\n      "email": {\n        "profile": "standard",\n        "from": "root@localhost",\n        "to": "root@localhost",\n        "subject": "Sigma Rule \'Malicious Named Pipe\'",\n        "body": "Hits:\\n{{#ctx.payload.hits.hits}}{{_source}}\\n================================================================================\\n{{/ctx.payload.hits.hits}}",\n        "attachments": {\n          "data.json": {\n            "data": {\n              "format": "json"\n            }\n          }\n        }\n      }\n    }\n  }\n}\nEOF\n

graylog

(EventID:("17" "18") AND PipeName.keyword:(\\\\isapi_http \\\\isapi_dg \\\\isapi_dg2 \\\\sdlrpc \\\\ahexec \\\\winsession \\\\lsassw \\\\46a676ab7f179e511e30dd2dc41bd388 \\\\9f81f59bc58452127884ce513865ed20 \\\\e710f28d59aa529d6792ca6ff0ca1b34 \\\\rpchlp_3 \\\\NamePipe_MoreWindows \\\\pcheap_reuse \\\\msagent_* \\\\gruntsvc))

splunk

(source="WinEventLog:Microsoft-Windows-Sysmon/Operational" (EventCode="17" OR EventCode="18") (PipeName="\\\\isapi_http" OR PipeName="\\\\isapi_dg" OR PipeName="\\\\isapi_dg2" OR PipeName="\\\\sdlrpc" OR PipeName="\\\\ahexec" OR PipeName="\\\\winsession" OR PipeName="\\\\lsassw" OR PipeName="\\\\46a676ab7f179e511e30dd2dc41bd388" OR PipeName="\\\\9f81f59bc58452127884ce513865ed20" OR PipeName="\\\\e710f28d59aa529d6792ca6ff0ca1b34" OR PipeName="\\\\rpchlp_3" OR PipeName="\\\\NamePipe_MoreWindows" OR PipeName="\\\\pcheap_reuse" OR PipeName="\\\\msagent_*" OR PipeName="\\\\gruntsvc"))

logpoint

(event_id IN ["17", "18"] PipeName IN ["\\\\isapi_http", "\\\\isapi_dg", "\\\\isapi_dg2", "\\\\sdlrpc", "\\\\ahexec", "\\\\winsession", "\\\\lsassw", "\\\\46a676ab7f179e511e30dd2dc41bd388", "\\\\9f81f59bc58452127884ce513865ed20", "\\\\e710f28d59aa529d6792ca6ff0ca1b34", "\\\\rpchlp_3", "\\\\NamePipe_MoreWindows", "\\\\pcheap_reuse", "\\\\msagent_*", "\\\\gruntsvc"])

grep

grep -P '^(?:.*(?=.*(?:.*17|.*18))(?=.*(?:.*\\isapi_http|.*\\isapi_dg|.*\\isapi_dg2|.*\\sdlrpc|.*\\ahexec|.*\\winsession|.*\\lsassw|.*\\46a676ab7f179e511e30dd2dc41bd388|.*\\9f81f59bc58452127884ce513865ed20|.*\\e710f28d59aa529d6792ca6ff0ca1b34|.*\\rpchlp_3|.*\\NamePipe_MoreWindows|.*\\pcheap_reuse|.*\\msagent_.*|.*\\gruntsvc)))'