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P4T12ICK
59 lines
2.0 KiB
YAML
59 lines
2.0 KiB
YAML
name: Suspicious Image Creation In Appdata Folder
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id: f6f904c4-1ac0-11ec-806b-acde48001122
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version: 2
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date: '2022-07-07'
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author: Teoderick Contreras, Splunk
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status: production
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type: TTP
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description: This search is to detect a suspicious creation of image in appdata folder
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made by process that also has a file reference in appdata folder. This technique
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was seen in remcos rat that capture screenshot of the compromised machine and place
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it in the appdata and will be send to its C2 server. This TTP is really a good indicator
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to check that process because it is in suspicious folder path and image files are
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not commonly created by user in this folder path.
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data_source:
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- Sysmon Event ID 1
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search:
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selection1:
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Processes.process_path: '*\\appdata\\Roaming\\*'
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Image|endswith: '*.exe'
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condition: selection1
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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 must have at least version 6.0.4 of the
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Sysmon TA.
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known_false_positives: unknown
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references:
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- https://success.trendmicro.com/dcx/s/solution/1123281-remcos-malware-information?language=en_US
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- https://blog.malwarebytes.com/threat-intelligence/2021/07/remcos-rat-delivered-via-visual-basic/
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tags:
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analytic_story:
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- Remcos
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asset_type: Endpoint
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confidence: 70
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impact: 70
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message: process $process_name$ creating image file $file_path$ in $dest$
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mitre_attack_id:
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- T1113
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observable:
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- name: Computer
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type: Hostname
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role:
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- Victim
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- name: process_name
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type: Process
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role:
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- Attacker
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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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risk_score: 49
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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/remcos/remcos_agent/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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