Autoitscript

Overview

Autoitscript (classified in antivirus detection telemetry under designations including Trojan:Win32/Autoitscript, Trojan.Win32.Autoitscript, and Win32/Autoitscript) is a multi-stage trojan engineered to disguise itself as legitimate software, execute unauthorized commands, and coordinate with external command-and-control infrastructure. Disseminated across enterprise networks and consumer workstations via social engineering, phishing attachments, malicious drive-by downloads, or weaponized software cracks, Autoitscript executes an initial reconnaissance phase upon system ingress. The binary evaluates host privileges, detects active hypervisors and sandbox environments to evade behavioral analysis, and establishes resilient autostart persistence by configuring registry keys under HKCU\Software\Microsoft\Windows\CurrentVersion\Run or registering background Windows services. Operational mechanics characteristic of this family include deceptive executable masquerading, registry run key autostart, system telemetry gathering, and remote C2 beaconing. Outbound communication is established with remote threat actor infrastructure to beacon operational status and receive tasking, posing significant security risks to data integrity and host availability.

Known aliases

Threat reports may refer to this family under multiple names:

• Trojan:Win32/Autoitscript
• Trojan.Win32.Autoitscript
• Win32/Autoitscript

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

Tactical Mitigations

Based on the techniques used by this family, consider the following defensive strategies:

• T1059.005: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

Tiered Detection Rules (Cisco CAIRN Model)

Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:

rule MALWARE_WIN_AUTOITSCRIPT_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Autoitscript"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "autoitscript" ascii wide nocase
        $s2 = "trojan:win32/autoitscript" ascii wide nocase
        $s3 = "trojan.win32.autoitscript" ascii wide nocase
        $s4 = "win32/autoitscript" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Autoitscript (Trojan) Execution & Triage
id: d1d79d76-3fe4-5af3-8278-fc518b17975d
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Autoitscript 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/autoitscript
- 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.t1059_003
- attack.t1027
- attack.t1547_001
- attack.t1071_001
- attack.t1105
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

rule MALWARE_WIN_AUTOITSCRIPT_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Autoitscript tradecraft"
        tier = "T3 - Attribution Fingerprint"
        confidence = "High (Confirmed Family Signature)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        // Core family identifier & heuristic payload signatures
        $attrib_str = "autoitscript" ascii wide nocase
        $pe_magic = "MZ" ascii
        $net_marker = "http" ascii nocase
    condition:
        uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Isolate the endpoint to prevent the injected secondary payload (which the AutoIt script dropped) from communicating with its C2 server.
2. Use advanced memory forensics tools (like Volatility) to dump the memory of the suspicious, hollowed processes to extract the final, unencrypted payload.
3. Decompile the original AutoIt executable in a sandboxed environment to extract the hardcoded C2 domains, encryption keys, or dropped files.
4. Hunt for similar AutoIt-compiled executables across the network using EDR queries targeting unknown binaries with AutoIt-specific metadata in the PE headers.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not rely solely on static analysis of the dropped `.exe`, as you will only be analyzing the legitimate AutoIt interpreter, not the malicious payload.
2. Avoid allowing users to run unsigned executables from temporary directories, as this is a primary execution path for AutoIt wrappers.

References & External Analysis

• Microsoft Defender Threat Encyclopedia - Trojan:Win32/Autoitscript
• Kaspersky Threat Intelligence - Trojan.Win32.Autoitscript
• MITRE ATT&CK - Enterprise Techniques
• Search "autoitscript" on VirusTotal (External Analysis)
• Search "autoitscript" on Any.Run (Sandbox Sandbox)
• Search "autoitscript" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Trojan)

Explore other documented threats in the same operational category:

• Minerbat
• Prjraptor
• Poscardstealer
• Ggdoor
• Delphi
• Socstealer
• Streespyer
• Luhn

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/autoitscript.json

Ecosystem & Interactive Environments

This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.