Name:Suspicious Process File Path id:9be25988-ad82-11eb-a14f-acde48001122 version:5 date:2024-11-28 author:Teoderick Contreras, Splunk status:production type:TTP Description:The following analytic identifies processes running from file paths not typically associated with legitimate software. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on specific process paths within the Endpoint data model. This activity is significant because adversaries often use unconventional file paths to execute malicious code without requiring administrative privileges. If confirmed malicious, this behavior could indicate an attempt to bypass security controls, leading to unauthorized software execution, potential system compromise, and further malicious activities within the environment. Data_source:
-Sysmon EventID 1
-Windows Event Log Security 4688
-CrowdStrike ProcessRollup2
search:| tstats `security_content_summariesonly` count values(Processes.process_name) as process_name values(Processes.process) as process min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_path = "*\\windows\\fonts\\*" OR Processes.process_path = "*\\windows\\temp\\*" OR Processes.process_path = "*\\users\\public\\*" OR Processes.process_path = "*\\windows\\debug\\*" OR Processes.process_path = "*\\Users\\Administrator\\Music\\*" OR Processes.process_path = "*\\Windows\\servicing\\*" OR Processes.process_path = "*\\Users\\Default\\*" OR Processes.process_path = "*Recycle.bin*" OR Processes.process_path = "*\\Windows\\Media\\*" OR Processes.process_path = "\\Windows\\repair\\*" OR Processes.process_path = "*\\temp\\*" OR Processes.process_path = "*\\PerfLogs\\*" by Processes.parent_process_name Processes.parent_process Processes.process_path Processes.dest Processes.user | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `suspicious_process_file_path_filter`
how_to_implement:The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the process GUID, process name, and parent process. Additionally, you must ingest complete command-line executions. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process. known_false_positives:Administrators may allow execution of specific binaries in non-standard paths. Filter as needed. References: -https://www.trendmicro.com/vinfo/hk/threat-encyclopedia/malware/trojan.ps1.powtran.a/ -https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/ -https://twitter.com/pr0xylife/status/1590394227758104576 -https://malpedia.caad.fkie.fraunhofer.de/details/win.asyncrat -https://www.microsoft.com/en-us/security/blog/2023/05/24/volt-typhoon-targets-us-critical-infrastructure-with-living-off-the-land-techniques/ drilldown_searches: name:'View the detection results for - "$dest$"' search:'%original_detection_search% | search dest = "$dest$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$dest$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' tags: analytic_story: - 'Double Zero Destructor' - 'Graceful Wipe Out Attack' - 'AsyncRAT' - 'WhisperGate' - 'Prestige Ransomware' - 'DarkGate Malware' - 'AgentTesla' - 'Brute Ratel C4' - 'RedLine Stealer' - 'Rhysida Ransomware' - 'Swift Slicer' - 'IcedID' - 'DarkCrystal RAT' - 'Chaos Ransomware' - 'PlugX' - 'Industroyer2' - 'Azorult' - 'Remcos' - 'XMRig' - 'Qakbot' - 'Volt Typhoon' - 'Hermetic Wiper' - 'Warzone RAT' - 'Trickbot' - 'Amadey' - 'BlackByte Ransomware' - 'LockBit Ransomware' - 'CISA AA23-347A' - 'Data Destruction' - 'Phemedrone Stealer' - 'Handala Wiper' - 'MoonPeak' - 'ValleyRAT' - 'Meduza Stealer' asset_type:Endpoint confidence:50 impact:70 message:Suspicious process $process_name$ running from a suspicious process path- $process_path$ on host- $dest$ mitre_attack_id: - 'T1543' observable: name:'dest' type:'Endpoint' - role: - 'Victim' name:'process_path' type:'Process Name' - role: - 'Attacker' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - '_time' - 'Processes.process_name' - 'Processes.process' - 'Processes.parent_process_name' - 'Processes.parent_process' - 'Processes.process_path' - 'Processes.dest' - 'Processes.user' risk_score:35 security_domain:endpoint
