data_compression_detector_sysmon_behavior

rule data_compression_detector_sysmon_behavior {
 meta:
    author = "Lee Archinal"
    description = "This content detects characteristcs of data compression as described by the Mitre Att&ck Framework Technique T1002  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/2L88AmwSHepe"
    version = "0.01"
    created = "2019/09/20"
    product = "windows"
    service = "sysmon"
    mitre = "execution, t1002"

  events:
((($selection1.metadata.product_event_type = "11" and re.regex($selection1.target.process.file.full_path, `.*\.powershell\.exe`) and re.regex($selection1.target.file.full_path, `.*\.zip`)) or ($selection1.metadata.product_event_type = "1" and re.regex($selection1.target.process.file.full_path, `.*rar\.exe`) and re.regex($selection1.target.process.command_line, `.*\.rar`))) or ($selection1.metadata.product_event_type = "11" and re.regex($selection1.target.process.file.full_path, `.*rar\.exe`) and re.regex($selection1.target.file.full_path, `.*\.rar`)))

  condition:
    $selection1
}