mirror of
https://github.com/splunk/security_content
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Bhavin Patel
0c3e5887e8
* chore: bump contentctl.yml and build.yml to 6.1.0 * move to removed * status is removed --------- Co-authored-by: research bot <research@splunk.com>
78 lines
4.7 KiB
YAML
78 lines
4.7 KiB
YAML
name: CHCP Command Execution
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id: 21d236ec-eec1-11eb-b23e-acde48001122
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version: 14
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creation_date: '2021-08-05'
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modification_date: '2026-06-03'
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author: Teoderick Contreras, Splunk
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status: removed
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deprecation_info:
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reason: Detection is deprecated as the usage of chcp.com by itself is not malicious.
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removed_in_version: 6.1.0
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replacement_content: []
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type: Anomaly
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description: The following analytic detects the execution of the chcp.com utility, which is used to change the active code page of the console. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process creation events. This activity is significant because it can indicate the presence of malware, such as IcedID, which uses this technique to determine the locale region, language, or country of the compromised host. If confirmed malicious, this could lead to further system compromise and data exfiltration.
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data_source:
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- Sysmon EventID 1
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- CrowdStrike ProcessRollup2
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search: |-
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| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Processes
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WHERE Processes.process_name=chcp.com
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BY Processes.action Processes.dest Processes.original_file_name
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Processes.parent_process Processes.parent_process_exec Processes.parent_process_guid
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Processes.parent_process_id Processes.parent_process_name Processes.parent_process_path
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Processes.process Processes.process_exec Processes.process_guid
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Processes.process_hash Processes.process_id Processes.process_integrity_level
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Processes.process_name Processes.process_path Processes.user
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Processes.user_id Processes.vendor_product
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| `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `chcp_command_execution_filter`
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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.
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known_false_positives: other tools or script may used this to change code page to UTF-* or others
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references:
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- https://ss64.com/nt/chcp.html
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- https://twitter.com/tccontre18/status/1419941156633329665?s=20
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drilldown_searches:
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- name: View the detection results for - "$dest$" and "$user$"
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search: '%original_detection_search% | search dest = "$dest$" user = "$user$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$dest$" and "$user$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$", "$user$") 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)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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intermediate_findings:
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entities:
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- field: dest
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type: system
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score: 20
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message: parent process $parent_process_name$ spawning chcp process $process_name$ with parent command line $parent_process$
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- field: user
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type: user
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score: 20
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message: parent process $parent_process_name$ spawning chcp process $process_name$ with parent command line $parent_process$
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analytic_story:
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- IcedID
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- Azorult
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- Crypto Stealer
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- Quasar RAT
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- Forest Blizzard
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- Interlock Rat
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asset_type: Endpoint
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mitre_attack_id:
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- T1059
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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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category: deprecated
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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/simulated_icedid/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: XmlWinEventLog
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test_type: unit
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