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tccontre
73 lines
2.6 KiB
YAML
73 lines
2.6 KiB
YAML
name: Linux Data Destruction Command
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id: b11d3979-b2f7-411b-bb1a-bd00e642173b
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version: 1
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date: '2023-02-08'
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author: Teoderick Contreras, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: The following analytic identifies a unix shell command that can wipe root folders of a linux host.
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This commandline is being abused by Awfulshred malware that wipes or corrupts files in a targeted Linux host. The shell command uses the
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rm command with force recursive deletion even in the root folder. This TTP can be a good indicator that a user or a process wants to wipe roots directory
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files in Linux host.
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search: '| 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 = "rm" AND Processes.process IN ("* -rf*", "* -fr*") AND Processes.process = "* --no-preserve-root"
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by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id
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Processes.parent_process_id Processes.process_guid
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| `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)`
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| `linux_data_destruction_command_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you can use the Add-on for Linux Sysmon from
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Splunkbase.
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known_false_positives: unknown
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references:
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- https://cert.gov.ua/article/3718487
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- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/overview-of-the-cyber-weapons-used-in-the-ukraine-russia-war/
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tags:
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analytic_story:
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- AwfulShred
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asset_type: Endpoint
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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confidence: 90
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context:
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- Source:Endpoint
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/awfulshred/test1/sysmon_linux.log
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impact: 100
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kill_chain_phases:
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- Exploitation
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message: a $process_name$ execute rm command with --no-preserve-root parmeter that can wipe root files in $dest$
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mitre_attack_id:
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- T1485
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nist:
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- DE.CM
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observable:
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- name: dest
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type: Hostname
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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.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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risk_score: 90
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security_domain: endpoint
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