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.dest Processes.parent_process Processes.process Processes.user
| `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`