Stream_Rat

Overview

Stream-RAT (also styled across security documentation as StreamRAT, Backdoor.StreamRAT, and Trojan.StreamRAT) is an early-to-mid 2000s Remote Access Trojan engineered primarily in Visual Basic to provide real-time multimedia surveillance and remote endpoint control. Distinguishing itself from conventional command-line backdoors of the era, Stream-RAT was specifically developed to provide low-latency desktop screen streaming, webcam hijacking, and microphone eavesdropping over raw TCP connections. Upon infecting a Windows host, Stream-RAT establishes persistence via registry autostart keys, hides its executable inside system directories, and establishes a persistent listening server socket or reverse connection to an operator-controlled management console. Beyond surveillance, Stream-RAT provides full remote administration capabilities including file upload/download, process control, keyboard monitoring, and remote registry editing.

Known aliases

Threat reports may refer to this family under multiple names:

• StreamRAT
• Backdoor.StreamRAT
• Trojan.StreamRAT
• Backdoor:Win32/StreamRAT
• Stream RAT 1.0

Family Pedigree & Lineage

Malware authors regularly fork and iterate upon existing codebases. Observed upstream lineage and downstream variants for this family include:

Derived From / Upstream Ancestry: Visual Basic Rat Frameworks

Known Derivatives & Downstream Variants: Streamrat 1.0 · Streamrat 2.0 · Streamrat.Gen

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:

• T1071.001: Implement web filtering and SSL/TLS inspection to detect malicious command and control (C2) traffic hiding in HTTP/HTTPS.
• T1113: Monitor for frequent or unauthorized screen captures or clipboard reads. Restrict background applications from accessing desktop APIs.
• T1125: Restrict access to local camera or microphone APIs. Utilize endpoint protection that monitors hardware access.

MITRE D3FEND™ Defensive Countermeasures

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

Indicators of Compromise

Public indicators drawn from CISA advisories and vendor reporting. These are historical and intended for retrospective threat hunting; current campaigns may use different infrastructure. SystemHelpDesk adheres to responsible disclosure and does not host live samples.

File hashes (SHA-256, sample)

Cryptographic hashes serve as reference indicators for triage and detection rules. In accordance with responsible threat intelligence disclosure, this catalog indexes reference metadata and does not host or distribute live malware binaries.

• 6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f
• 2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c

Delivery vectors

• Distribution via underground hacker forums and file-sharing networks disguised as multimedia tools
• Phishing emails with compressed attachments containing Visual Basic droppers

Persistence mechanisms

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run\StreamRATServer
• HKLM\Software\Microsoft\Windows\CurrentVersion\Run\StreamService

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_STREAM_RAT_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Stream_Rat"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "stream_rat" ascii wide nocase
        $s2 = "streamrat" ascii wide nocase
        $s3 = "backdoor.streamrat" ascii wide nocase
        $s4 = "trojan.streamrat" ascii wide nocase
        $s5 = "backdoor:win32/streamrat" ascii wide nocase
        $s6 = "stream rat 1.0" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Stream_rat (Trojan) Execution & Triage
id: 8aba8a3a-9728-5cfe-a7a8-dde9d1edf304
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Stream_rat 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/stream_rat
- 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.t1113
- attack.t1125
- attack.t1123
- attack.t1071_001
- attack.t1547_001
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_STREAM_RAT_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Stream_Rat 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 = "stream_rat" 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. Disconnect the affected workstation from the local network and internet to disable video/audio streaming sessions.
2. Identify and terminate the running Stream-RAT server process.
3. Remove autostart registry entries under HKCU\Software\Microsoft\Windows\CurrentVersion\Run.
4. Delete the trojan executable from Windows system directories.

What to Avoid

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

1. Do not execute unknown media player utilities or video codecs obtained from unverified download sources.
2. Avoid leaving webcams or audio devices connected to unsecured workstations.

References & External Analysis

• Kaspersky Threat Intelligence Portal - Backdoor.Win32.StreamRAT
• Malware Museum Historical RAT Collection - StreamRAT
• Search "stream_rat" on VirusTotal (External Analysis)
• Search "stream_rat" on Any.Run (Sandbox Sandbox)
• Search "stream_rat" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Trojan)

Explore other documented threats in the same operational category:

• Dragonbot
• Injeber
• Vampire
• Pcreviver
• Nukesped
• Qhosts
• Rasoon
• Otorunq

Machine-readable

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