{
  "title": "SystemHelpDesk Detection - Proxyagent (Trojan) Execution & Triage",
  "id": "ec2c698f-6f3a-5b25-a9ef-61659d223e34",
  "status": "production",
  "description": "Detects execution, defense evasion, and persistence behaviors associated with the Proxyagent malware family. Detects suspicious execution from temporary user directories with hidden window flags and background transfer utilities.",
  "references": [
    "https://malware-families-catalog.systemhelpdesk.com/families/proxyagent",
    "https://malware-families-catalog.systemhelpdesk.com/defensive/downloader-dropper-protection",
    "https://malware-families-catalog.systemhelpdesk.com/"
  ],
  "author": "Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP",
  "date": "2026-10-14",
  "modified": "2026-10-14",
  "tags": [
    "attack.trojan",
    "author.ricky-jordan",
    "source.systemhelpdesk-mfc",
    "attack.t1090_002",
    "attack.t1562_004",
    "attack.t1543_003"
  ],
  "logsource": {
    "category": "process_creation",
    "product": "windows"
  },
  "detection": {
    "selection_process": {
      "Image|endswith": [
        "\\cmd.exe",
        "\\powershell.exe",
        "\\cscript.exe",
        "\\wscript.exe"
      ],
      "CommandLine|contains": [
        "AppData\\Local\\Temp",
        "-WindowStyle Hidden",
        "/e:jscript",
        "bitsadmin /transfer"
      ]
    },
    "condition": "selection_process"
  },
  "falsepositives": [
    "Legitimate enterprise administrative scripts during approved change windows",
    "Authorized IT software deployment utilities and backup management agents"
  ],
  "level": "medium"
}