Ggdoor

Category: trojan · Aliases: Backdoor.GGDoor, Trojan.GGDoor, Win32/GGDoor · Sample count (EMBER 2018): 1 · Enrichment: insufficient_information · Updated: 2026-07-01T17:06:28Z

Category: TrojanActor: Unknown / CybercriminalIndustry: Global / OpportunisticMotivation: Opportunistic

Overview

Executive Summary

GGDoor is a dangerous Backdoor Trojan engineered to provide remote attackers with covert, persistent, and unfettered access to compromised Windows systems. Unlike highly automated botnets, GGDoor is often utilized in targeted attacks, allowing the threat actor to manually explore the infected network, steal sensitive data, and manipulate the system as if they were sitting directly at the keyboard.

Infection Vector and Technical Capabilities

GGDoor is primarily distributed via targeted spear-phishing campaigns (often utilizing weaponized Office documents) or deployed as a secondary payload by initial access brokers who have already breached the perimeter via exposed RDP ports or VPN vulnerabilities. Once the backdoor is executed on the victim's machine, it establishes a deep foothold:

Covert C2 Communication: GGDoor establishes a persistent, encrypted connection to its command-and-control (C2) server. It typically operates over standard web ports (HTTPS/443) or utilizes customized protocols designed to blend in with legitimate enterprise traffic and bypass edge firewalls.
Interactive Shell and File Manipulation: The backdoor provides the attacker with an interactive remote shell (cmd.exe or PowerShell), allowing them to execute arbitrary commands with the privileges of the infected user. The attacker can silently browse the file system, upload exfiltration tools, or download proprietary data.
System Manipulation: GGDoor allows the attacker to view and terminate running processes, edit the Windows Registry, and manipulate Windows Services, enabling them to disable local antivirus solutions or install further persistence mechanisms.

Threat Assessment

A GGDoor infection is a critical security incident. The malware's extensive capabilities mean that the compromised endpoint is fully under the control of the attacker. This leads directly to the loss of intellectual property, compromised user credentials, and the near certainty of lateral movement across the enterprise network.

Incident Response and Remediation

Immediate Isolation: Sever the affected machine's network connection immediately. This halts the connection to the C2 server and prevents active data exfiltration or lateral movement.
Forensic Analysis: Perform a deep forensic review of the endpoint. Because the attacker had interactive access, responders must determine exactly what commands were executed via the backdoor to understand the full scope of the breach.
Comprehensive Credential Reset: Assume all credentials utilized on the infected machine, as well as any stored in browsers or password managers, are fully compromised. Initiate an immediate, organization-wide password reset.

Known aliases

Threat reports may refer to this family under multiple names:

MITRE ATT&CK Techniques

This family has been observed using the following ATT&CK techniques: T1059 T1105 T1056 T1547.001

Tactical Mitigations

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

T1056: Monitor for unauthorized keylogging, screen capturing, or web browser API hooking. Deploy EDR to detect API hooking.
T1059: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.
T1105: Implement network intrusion detection systems (NIDS) and host-based firewalls to block unauthorized inbound or outbound file transfers.

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_GGDOOR {
    meta:
        description = "Detects Ggdoor (trojan)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "ggdoor" ascii wide nocase
        $s2 = "backdoor.ggdoor" ascii wide nocase
        $s3 = "trojan.ggdoor" ascii wide nocase
        $s4 = "win32/ggdoor" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Ggdoor Activity
id: 54dc37274b464a082e4a4291f87c2ad3
status: experimental
description: Detects generic indicators of the ggdoor malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*ggdoor*"
            - "*backdoor.ggdoor*"
            - "*trojan.ggdoor*"
            - "*win32/ggdoor*"
    condition: selection
level: medium

References & External Analysis

Search "ggdoor" on VirusTotal (External Analysis)

Frequently Asked Questions

How do I remove the Ggdoor Trojan from Windows?

Manual removal of Ggdoor is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.

Is Ggdoor a virus or a Trojan?

Ggdoor is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Ggdoor typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.

What are the main symptoms of a Ggdoor infection?

Symptoms of Ggdoor can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.

Related Families (Category: trojan)

Explore other malware families in the same category:

Protect Your Network Against Trojans

Want to prevent Ggdoor and similar threats from compromising your organization? Read our comprehensive defensive guide: Banking Trojan Protection.

Need help with an active incident? Published by the SystemHelpdesk team.

Machine-readable

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