Qqshou

Overview

Trojan:Win32/Qqshou is a specialized trojan designed to target users of the immensely popular Chinese instant messaging platform, Tencent QQ. Its primary objective is the theft of QQ login credentials, virtual currency (Q coins), and in-game assets linked to the account, which are then sold on underground markets.

Understanding Qqshou (Credential Stealers)
To an end-user, a Qqshou infection usually goes unnoticed until they find themselves locked out of their QQ account or discover their virtual currency has been drained. For a threat intelligence analyst, Qqshou represents a highly targeted, region-specific credential stealer that utilizes keylogging and memory scraping techniques focused entirely on a single application ecosystem.

Execution and Data Exfiltration Mechanics
Qqshou is typically distributed via malicious links sent through QQ itself, disguised as game cheats, or bundled with pirated software. Upon execution, it establishes persistence (often via Registry Run keys) and actively monitors the system for the execution of the legitimate Tencent QQ client (`qq.exe`). When detected, Qqshou employs various techniques to steal credentials: it may inject a keylogger to capture keystrokes when the QQ window is in focus (`T1056.001`), or it may use memory scraping to extract session tokens directly from the process memory (`T1003`). The stolen data is then exfiltrated to an attacker-controlled server, often via HTTP POST requests or even by sending an email.

Indicators of Compromise & Impact
The primary impact is the loss of the QQ account and associated financial assets. Host-based IoCs include EDR alerts for suspicious API calls (like `SetWindowsHookEx` for keylogging) originating from an unknown process and targeting `qq.exe`. Network IoCs involve anomalous outbound connections (often SMTP or HTTP) transmitting encrypted or encoded data immediately after the user logs into QQ.

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to the MITRE ATT&CK framework:

Tactical Mitigations

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

• T1003: Monitor for LSASS memory dumping or registry SAM extraction. Enable Credential Guard on Windows systems.
• 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.

Generated Detections (Boilerplate)

These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.

YARA Rule

rule MALWARE_WIN_QQSHOU {
    meta:
        description = "Detects Qqshou (trojan)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "qqshou" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Qqshou Activity
id: 271c7c85e288e17ccc2613210d31540c
status: experimental
description: Detects generic indicators of the qqshou malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*qqshou*"
    condition: selection
level: medium

Containment & Response Steps

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

1. Isolate the infected machine and use a clean device to immediately change the password for the compromised QQ account and enable two-factor authentication.
2. Run a full system scan using a reputable anti-malware solution to locate and remove the Qqshou executable and its persistence mechanisms.
3. Report the compromise to Tencent support to attempt recovery of any stolen virtual currency or assets.
4. Review the account's recent activity for unauthorized messages sent to contacts (as Qqshou may be used to spread itself).

What to Avoid

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

1. Do not continue to use the infected machine for any secure logins (banking, email) until it has been thoroughly cleaned, as the keylogger may capture other credentials.
2. Avoid clicking on unsolicited links or downloading 'cheats' from untrusted sources, even if sent by a known contact on QQ.

References & External Analysis

• Search "qqshou" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: trojan)

Explore other malware families in the same category:

• Spypro
• Socstealer
• Sign0Fmisery
• Potao
• Ramnif

Machine-readable

Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/qqshou.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.