Game

Overview

Trojan:Win32/GameThief (frequently cataloged in security telemetry as Trojan.Game, Win32/Game, or Trojan-PSW.Win32.Game) is a specialized class of password-stealing trojans engineered specifically to hijack online gaming accounts, digital asset inventories, and platform authentication tokens. Operating primarily across popular gaming ecosystems including Steam, Blizzard Battle.net, Electronic Arts, and MMORPG titles like World of Warcraft and Lineage, GameThief monitors running processes for target game binaries. Once active, the trojan installs low-level keyboard hooks (via SetWindowsHookEx) to log keystrokes entered into login dialogs, reads memory buffers of target processes to extract session credentials, and inspects local credential stores. Harvested credentials, virtual inventory details, and session cookies are packaged and exfiltrated to threat actor command-and-control servers via encrypted HTTP POST or FTP channels, enabling secondary monetisation on dark web illicit credential markets.

Known aliases

Threat reports may refer to this family under multiple names:

• Game
• Trojan:Win32/GameThief
• Win32/GameThief
• Trojan-PSW.Win32.Game
• Trojan.Game
• GameThief Stealer
• Trojan-GameThief.Win32.Game

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: Win32 Password Stealer Generic Lineage

Known Derivatives & Downstream Variants: Trojan:Win32/Gamethief.A · Trojan-Psw.Win32.Game.Gen · Win32/Gamethief.B

MITRE ATT&CK Techniques

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

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.

• e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
• 7a4f912c49b08d98d8932efea1496a98f121e4912952467d0233b8a1391d1234

Delivery vectors

• Trojanized game cracks and trainers
• Drive-by downloads from warez portals
• Phishing links on gaming forums

Persistence mechanisms

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run\GameLoader
• Startup folder shortcuts disguised as game utilities

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_GAME_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Game"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "game" ascii wide nocase
        $s2 = "game" ascii wide nocase
        $s3 = "trojan:win32/gamethief" ascii wide nocase
        $s4 = "win32/gamethief" ascii wide nocase
        $s5 = "trojan-psw.win32.game" ascii wide nocase
        $s6 = "trojan.game" ascii wide nocase
        $s7 = "gamethief stealer" ascii wide nocase
        $s8 = "trojan-gamethief.win32.game" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Game (Trojan) Execution & Triage
id: e4e98647-4d21-5130-8f62-ede5937041f9
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Game 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/game
- 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.t1056_001
- attack.t1555
- attack.t1057
- attack.t1041
- 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_GAME_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Game 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 = "game" 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; users executing fake game mods often intentionally disable AV, meaning the machine is highly vulnerable to secondary payloads.
2. Force a global password reset for all user accounts, specifically targeting gaming platforms (Steam, Epic), Discord, and web browsers.
3. Perform a comprehensive EDR sweep of the endpoint to locate the secondary information stealers or cryptominers dropped by the fake mod.
4. Enforce strict application whitelisting and local administrator restrictions to prevent users from executing unverified gaming tools on corporate assets.

What to Avoid

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

1. Do not assume the endpoint is safe just because the game mod was deleted; the secondary payloads (like RedLine Stealer) are the primary threat.
2. Avoid ignoring the policy violation; users executing game cheats on corporate networks present a massive insider risk.

References & External Analysis

• Kaspersky Threat Intelligence - Trojan-GameThief Profile
• Microsoft Defender Security Intelligence - Trojan:Win32/GameThief
• Trend Micro Threat Encyclopedia - Trojan.Win32.Game
• Search "game" on VirusTotal (External Analysis)
• Search "game" on Any.Run (Sandbox Sandbox)
• Search "game" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Trojan)

Explore other documented threats in the same operational category:

• Subseven
• Bolik
• Taptrap
• Bsvsebni
• Genericrxfy
• Bnksa
• Snojan
• Nmkfxmdtnmoi

Machine-readable

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