Name:Suspicious Process Executed From Container File id:d8120352-3b62-411c-8cb6-7b47584dd5e8 version:12 date:None author:Steven Dick status:production type:TTP Description:The following analytic identifies a suspicious process executed from within common container/archive file types such as ZIP, ISO, IMG, and others. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity is significant as it is a common technique used by adversaries to execute scripts or evade defenses. If confirmed malicious, this behavior could allow attackers to execute arbitrary code, escalate privileges, or persist within the environment, posing a significant security risk. Data_source:
-Sysmon EventID 1
-Windows Event Log Security 4688
-CrowdStrike ProcessRollup2
search:| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process IN ( "*.ZIP\\*", "*.ISO\\*", "*.IMG\\*", "*.CAB\\*", "*.TAR\\*", "*.GZ\\*", "*.RAR\\*", "*.7Z\\*" ) AND Processes.action="allowed" by Processes.action Processes.dest Processes.original_file_name Processes.parent_process Processes.parent_process_exec Processes.parent_process_guid Processes.parent_process_id Processes.parent_process_name Processes.parent_process_path Processes.process Processes.process_exec Processes.process_guid Processes.process_hash Processes.process_id Processes.process_integrity_level Processes.process_name Processes.process_path Processes.user Processes.user_id Processes.vendor_product | `drop_dm_object_name(Processes)` | regex process="(?i).*\.(zip|iso|img|cab|tar|gz|rar|7z)\\\\.+\.(bat|bin|cab|cmd|com|cpl|ex_|exe|gadget|inf1|ins|inx|htm|html|isu|jar|job|js|jse|lnk|msc|msi|msp|mst|paf|pif|ps1|reg|rgs|scr|sct|shb|shs|u3p|vb|vbe|vbs|vbscript|ws|wsf|wsh)\"?$" | rex field=process "(?i).+\\\\(?<file_name>[^\\\\]+\.(?:zip|iso|img|cab|tar|gz|rar|7z))\\\\(?:.+\\\\)?(?<container_file_name>[^\\\\\"]+\.(?:bat|bin|cab|cmd|com|cpl|ex_|exe|gadget|inf1|ins|inx|htm|html|isu|jar|job|js|jse|lnk|msc|msi|msp|mst|paf|pif|ps1|reg|rgs|scr|sct|shb|shs|u3p|vb|vbe|vbs|vbscript|ws|wsf|wsh))\"?$" | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `suspicious_process_executed_from_container_file_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:Various business process or userland applications and behavior. References: -https://www.mandiant.com/resources/blog/tracking-evolution-gootloader-operations -https://www.crowdstrike.com/blog/weaponizing-disk-image-files-analysis/ -https://attack.mitre.org/techniques/T1204/002/ drilldown_searches: name:'View the detection results for - "$dest$" and "$user$"' search:'%original_detection_search% | search dest = "$dest$" user = "$user$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$dest$" and "$user$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$", "$user$") | 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:'7d' latest_offset:'0' analytic_story:['APT37 Rustonotto and FadeStealer', 'GhostRedirector IIS Module and Rungan Backdoor', 'Unusual Processes', 'Amadey', 'Remcos', 'Snake Keylogger', 'Water Gamayun']
