Techniques
Sample rules
Suspicious Process Executed From Container File
- source: splunk
- technicques:
- T1204.002
- T1036.008
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.
Detection logic
| tstats `security_content_summariesonly` count values(Processes.process_name) as process_name 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))\\\\((.+\\\\)+)?(?<process_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`