Apocalypse_Rat

Overview

Apocalypse RAT (Remote Access Trojan) is a potent piece of malware designed to provide threat actors with comprehensive control over compromised Windows systems. Emerging in the cyber threat landscape as a versatile tool for espionage and data exfiltration, it possesses a wide array of capabilities. These include the ability to log keystrokes, capture screen activity, manage files, and execute arbitrary commands, making it highly effective for stealthy operations. The malware often evades detection through sophisticated obfuscation techniques and by injecting itself into legitimate system processes. Its architecture allows it to easily receive updates and additional modules from its command and control (C2) servers, ensuring its continuous viability as a threat. Organizations must employ advanced behavioral analysis and strict network monitoring to effectively identify and mitigate Apocalypse RAT infections.

Known aliases

Threat reports may refer to this family under multiple names:

• ApocRAT
• Apocalypse RAT

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: Delphi_Rat_Framework

Known Derivatives & Downstream Variants: Apocrat · Apocalypse_Rat.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:

• 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.
• T1071: Monitor network traffic for anomalous application layer protocols like non-standard HTTP/S patterns or unexpected DNS requests.
• T1113: Monitor for frequent or unauthorized screen captures or clipboard reads. Restrict background applications from accessing desktop APIs.

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.

• a1c2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2
• b2d3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3

Delivery vectors

• Underground forum cracked toolkits and deceptive software utilities
• Spear-phishing emails containing malicious RTF documents (CVE-2014-1761)

Persistence mechanisms

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run\ApocalypseServer
• Startup folder shortcut pointing to payload in %APPDATA%\Roaming

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_APOCALYPSE_RAT_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Apocalypse_Rat"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "apocalypse_rat" ascii wide nocase
        $s2 = "apocrat" ascii wide nocase
        $s3 = "apocalypse rat" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Apocalypse_rat (Rat) Execution & Triage
id: 151f4532-7337-567c-8811-7d883812d647
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Apocalypse_rat 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/apocalypse_rat
- 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.t1056
- attack.t1113
- attack.t1059
- attack.t1055
- attack.t1071
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_APOCALYPSE_RAT_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Apocalypse_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 = "apocalypse_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. Isolate affected endpoints from the network immediately to sever unauthorized command and control communication.
2. Identify and terminate active Apocalypse Rat binaries and associated parent-child process chains.
3. Audit persistence vectors including Registry Run keys, Scheduled Tasks, and services for unauthorized entries.
4. Collect forensic disk and memory triage artifacts before conducting system re-imaging.

What to Avoid

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

1. Do not attempt manual string or file deletion while network connections remain active; this can trigger secondary dropper routines.
2. Avoid restoring from backups without verifying that the backup snapshot predates initial Apocalypse Rat installation.

References & External Analysis

• Malwarebytes Labs Threat Intelligence - Apocalypse RAT Analysis
• NIST National Vulnerability Database - CVE-2014-1761
• Search "apocalypse_rat" on VirusTotal (External Analysis)
• Search "apocalypse_rat" on Any.Run (Sandbox Sandbox)
• Search "apocalypse_rat" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Rat)

Explore other documented threats in the same operational category:

• Immirat
• Gh0St
• Poison
• Farfli
• Prorat
• Hupigon
• Recam
• Sdbot

Machine-readable

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