Xtrat

Overview

Xtreme RAT (widely tracked as xtrat or xrat) is a feature-complete, commercial-grade remote access trojan that first surfaced in late 2010. Engineered originally by an underground developer known as 'ip-owner' and sold on Arabic and English cybercrime forums, the tool quickly transcended ordinary cybercrime to become a favorite espionage weapon of advanced persistent threat (APT) actors. Xtreme RAT is notorious for its extensive surveillance and operational capabilities: it captures keystrokes, streams live video and audio from attached webcams and microphones, steals browser credentials, manipulates the local registry and file system, and provides interactive reverse command shells. The trojan was prominently deployed by state-sponsored actors including APT28 (Fancy Bear / Sofacy), the Syrian Electronic Army (SEA), and Middle Eastern espionage syndicates targeting defense contractors, government ministries, and political dissidents. Distribution was typically executed via targeted spear-phishing campaigns delivering weaponized Microsoft Office documents exploiting CVE-2012-0158 (ActiveX MSCOMCTL.OCX) and CVE-2014-1761, dropping packed payloads into the AppData directory.

Known aliases

Threat reports may refer to this family under multiple names:

• Xtreme RAT
• XtremeRAT
• xrat
• xtrat
• XRat

Threat Actor Attribution

Attribution is probabilistic, not a science. Each link below states its confidence level and the evidence behind it.

• ip-owner (Developer) / Weaponized by APT28 & Syrian Electronic Army High confidence
  Basis: Originally authored by the underground developer 'ip-owner' and sold on cybercrime forums. Extensively weaponized in targeted espionage campaigns by APT28 (Fancy Bear), the Syrian Electronic Army (SEA), and Middle Eastern APT groups targeting government defense ministries and dissidents. [source]

Family Pedigree & Lineage

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

Known Derivatives & Downstream Variants: Xtremerat V2 · Xtremerat V3 · Mof_Variant

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:

• T1056.001: Implement Endpoint Detection and Response (EDR) to monitor for suspicious API calls related to keystroke interception. Enforce Multi-Factor Authentication (MFA) to render stolen passwords useless.
• T1059.003: Restrict execution of Windows Command Shell (cmd.exe) and block unauthorized batch scripts.
• T1071.001: Implement web filtering and SSL/TLS inspection to detect malicious command and control (C2) traffic hiding in HTTP/HTTPS.
• T1105: Implement network intrusion detection systems (NIDS) and host-based firewalls to block unauthorized inbound or outbound file transfers.
• 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):

Exploited Vulnerabilities (CVEs)

This malware family is documented weaponizing the following common vulnerabilities and exposures:

• CVE-2012-0158 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).
• CVE-2014-1761 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).

Command & Control (C2) and Network Profile

How this family talks to its operators. C2 traffic can often identify a family even when its code and configuration are hard to analyse. Ports and patterns are historical and change between campaigns, so use them as hunting leads rather than block-only rules.

Network detection ideas

• Detect outbound raw TCP sessions on non-standard ports (e.g. 8181, 1024) with repetitive 'PING' / 'PONG' keepalive packets
• Block dynamic DNS domains matching known Xtreme RAT infrastructure patterns
• Inspect Word document execution spawning svchost.exe or cmd.exe under CVE-2012-0158 exploitation

Sources: MITRE ATT&CK S0036: XtremeRAT, US-CERT / CISA Alert TA14-149A

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.

• 0f93f66a87c10b4f0b3dd1dca7e8df600dc450fa2066c1f20fa540a92d80c3d9
• 9d60ecfcfa3f044bc3f1f7cae6d5e751893d56a2bbcb5b3cb245c4fc46bc6e4e

Delivery vectors

• Targeted spear-phishing emails with weaponized RTF attachments exploiting CVE-2012-0158 or CVE-2014-1761
• Self-extracting archive (SFX) disguised as administrative updates or military reports

Persistence mechanisms

• Registry Run key in HKCU\Software\Microsoft\Windows\CurrentVersion\Run pointing to %APPDATA% directory
• Process injection into explorer.exe or svchost.exe

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_XTRAT_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Xtrat"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "xtrat" ascii wide nocase
        $s2 = "xtreme rat" ascii wide nocase
        $s3 = "xtremerat" ascii wide nocase
        $s4 = "xrat" ascii wide nocase
        $s5 = "xtrat" ascii wide nocase
        $s6 = "xrat" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Xtrat (Rat) Execution & Triage
id: 87243534-33c0-5dd6-9c68-a009df07e47b
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Xtrat malware family. Detects unauthorized persistence creation via Windows
  Registry Run keys, scheduled tasks, and privilege escalation indicative of RAT installations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/xtrat
- https://malware-families-catalog.systemhelpdesk.com/defensive/backdoor-rat-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.rat
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1059_003
- attack.t1056_001
- attack.t1113
- attack.t1125
- attack.t1105
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \reg.exe
    - \schtasks.exe
    - \cmd.exe
    - \powershell.exe
    CommandLine|contains:
    - \CurrentVersion\Run
    - /create /tn
    - bypass -enc
    - net user /add
    - net localgroup administrators
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: high

rule MALWARE_WIN_XTRAT_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Xtrat 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 = "xtrat" 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. Immediately isolate the compromised host from internal LAN and WAN environments to cut off interactive remote shell sessions established by Xtrat.
2. Inspect active socket listeners and outbound established network connections ('netstat -ano') to identify and sever covert TCP/UDP channels used by Xtrat.
3. Scan Windows Services, Scheduled Tasks, and Startup folders to locate and eliminate persistent backdoor listeners configured by Xtrat.
4. Invalidate all active VPN profiles, local administrator credentials, and session tokens that may have been harvested by the Xtrat operator.
5. Re-image the affected host using a validated golden image prior to reconnecting it to enterprise network segments.

What to Avoid

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

1. Do not attempt to interact with or send messages through the Xtrat remote terminal, as this alerts the attacker and may cause them to execute destructive anti-forensic commands.
2. Avoid relying solely on static file signatures, as Xtrat payloads frequently execute reflectively in memory without writing binaries to disk.

References & External Analysis

• Malpedia (Fraunhofer FKIE): Xtreme RAT (win.extreme_rat)
• CISA Advisory: US-CERT Alert TA14-149A (Targeted Attacks Against Defense Entities)
• Search "xtrat" on VirusTotal (External Analysis)
• Search "xtrat" on Any.Run (Sandbox Sandbox)
• Search "xtrat" on MalwareBazaar (Malware Samples)

North American Authority Advisory (CISA / NIST)

The Cybersecurity and Infrastructure Security Agency (CISA) has published an official US federal advisory on this family, which can be mapped to NIST Cybersecurity Framework (CSF) incident response controls: US-CERT Alert TA14-149A (Targeted Attacks Against Defense Entities) ↗

Frequently Asked Questions

Related Threats (Category: Rat)

Explore other documented threats in the same operational category:

• Njrat
• Netwire
• Bifrost
• Netwiredrc
• Asyncrat
• Rescoms
• Poison
• Bladabindi

Machine-readable

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