blue-team-tools/rules/windows/process_creation/win_data_compressed_with_rar.yml

title: Data Compressed - rar.exe
id: 6f3e2987-db24-4c78-a860-b4f4095a7095
status: experimental
description: An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount
    of data sent over the network
author: Timur Zinniatullin, oscd.community
date: 2019/10/21
modified: 2019/11/04
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1002/T1002.yaml
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\rar.exe'
        CommandLine|contains|all:
            - ' a '
            - '-r'
    condition: selection
fields:
    - Image
    - CommandLine
    - User
    - LogonGuid
    - Hashes
    - ParentProcessGuid
    - ParentCommandLine
falsepositives:
    - highly likely if rar is default archiver in the monitored environment
level: low
tags:
    - attack.exfiltration
    - attack.t1002