{"id":"f14e169e-9978-4c69-acb3-1cff8200bc36","title":"Suspicious GrpConv Execution","description":"Detects the suspicious execution of a utility to convert Windows 3.x .grp files or for persistence purposes by malicious software or actors","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-05-19","modified":"","tags":["attack.privilege-escalation","attack.persistence","attack.t1547"],"technique_ids":["T1547"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://twitter.com/0gtweet/status/1526833181831200770"],"source_path":"rules/windows/process_creation/proc_creation_win_lolbin_susp_grpconv.yml","source_sha256":"ac388faa2bbd6a851693ae98811b2faf0d90319aaa9791adc921b8d0cb5803c7","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_lolbin_susp_grpconv.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious GrpConv Execution\nid: f14e169e-9978-4c69-acb3-1cff8200bc36\nstatus: test\ndescription: Detects the suspicious execution of a utility to convert Windows 3.x .grp files or for persistence purposes by malicious software or actors\nreferences:\n    - https://twitter.com/0gtweet/status/1526833181831200770\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-05-19\ntags:\n    - attack.privilege-escalation\n    - attack.persistence\n    - attack.t1547\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        CommandLine|contains:\n            - 'grpconv.exe -o'\n            - 'grpconv -o'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1547","id":"T1547","name":"Boot or Logon Autostart Execution","page":"techniques/enterprise/T1547/"}],"data_path":"data/detection-rules/f14e169e-9978-4c69-acb3-1cff8200bc36.json","kind":"sigma"}