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tccontre
91 lines
3.3 KiB
YAML
91 lines
3.3 KiB
YAML
name: CMD Carry Out String Command Parameter
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id: 54a6ed00-3256-11ec-b031-acde48001122
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version: 3
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date: '2023-04-05'
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author: Teoderick Contreras, Bhavin Patel, Splunk
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status: production
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type: Hunting
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description: The following analytic identifies command-line arguments where `cmd.exe
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/c` is used to execute a program. `cmd /c` is used to run commands in MS-DOS and
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terminate after command or process completion. This technique is commonly seen in
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adversaries and malware to execute batch command using different shell like PowerShell
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or different process other than `cmd.exe`. This is a good hunting query for suspicious
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command-line made by a script or relative process execute it.
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data_source:
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- Sysmon Event ID 1
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search: '| tstats `security_content_summariesonly` min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where `process_cmd` AND Processes.process="*
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/c *" by Processes.dest Processes.user Processes.parent_process Processes.process_name
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Processes.original_file_name Processes.process Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `cmd_carry_out_string_command_parameter_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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known_false_positives: False positives may be high based on legitimate scripted code
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in any environment. Filter as needed.
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references:
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- https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/
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- https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
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tags:
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analytic_story:
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- ProxyNotShell
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- Qakbot
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- Winter Vivern
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- DarkCrystal RAT
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- AsyncRAT
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- Log4Shell CVE-2021-44228
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- Hermetic Wiper
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- Chaos Ransomware
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- IcedID
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- WhisperGate
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- Data Destruction
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- Living Off The Land
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- Azorult
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- Data Destruction
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asset_type: Endpoint
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automated_detection_testing: passed
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confidence: 50
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cve:
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- CVE-2021-44228
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impact: 60
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ by user $user$ attempting spawn a new process.
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mitre_attack_id:
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- T1059.003
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- T1059
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observable:
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- name: dest
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type: Endpoint
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role:
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- Victim
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- name: user
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type: User
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role:
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- Victim
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.process_name
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- Processes.process_id
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- Processes.process
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- Processes.dest
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- Processes.user
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- Processes.process_id
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- Processes.parent_process_id
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risk_score: 30
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/icedid/cmd_carry_str_param/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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