Beebone

Overview

Beebone (widely cataloged across security vendors as the W32.Worm.Beebone or AAEH family) is a highly aggressive, polymorphic downloader worm first identified in 2012. Engineered to act as a resilient distribution engine, Beebone specialized in dropping secondary malware payloads—including banking trojans, rootkits, fake antivirus rogueware, and ransomware—onto infected systems across corporate and consumer networks worldwide. Beebone earned a reputation for extreme polymorphism: the worm re-compiled its code and crypter multiple times per day, ensuring that endpoint antivirus signatures remained perpetually ineffective. In April 2015, Europol's European Cybercrime Centre (EC3), the FBI, the Dutch National High Tech Crime Unit (NHTCU), the Joint Cybercrime Action Taskforce (J-CAT), and private security vendors executed a coordinated global strike against the Beebone botnet. The coalition successfully sinkholed all 100 domain names generated by the worm's domain generation algorithm (DGA), eradicating its command-and-control apparatus across more than 195 nations.

Known aliases

Threat reports may refer to this family under multiple names:

• Beebone
• W32.Worm.Beebone
• Worm.Beebone
• AAEH
• VBCrypt

Threat Actor Attribution

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

• Beebone Authoring Syndicate / Europol EC3 & FBI April 2015 Takedown High confidence
  Basis: In April 2015, Europol EC3, the FBI, Dutch Police, and J-CAT executed a coordinated strike sinkholing all 100 DGA domains used by Beebone, ending its operations across 195 countries. [source]

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: Vbcrypt Engine

Known Derivatives & Downstream Variants: W32.Worm.Beebone (Initial Worm) · Beebone Dga Edition · Aaeh Polymorphic Dropper

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:

• T1105: Implement network intrusion detection systems (NIDS) and host-based firewalls to block unauthorized inbound or outbound file transfers.

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-2010-2568 — 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.

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.

• 0ba91fcf3b2a3dbe16999be3a6c4b2de0a34fe9a42f36d8f5b40cf392bc6914c
• 4de40ad749e7b2eb26d2466f10c66be91a134372a6b2cbdf7de0d6cfcf52240b

Delivery vectors

• Removable USB drive worm propagation exploiting Windows Shell shortcut flaws (CVE-2010-2568)
• Peer-to-peer file sharing and compromised software crack distributions

Persistence mechanisms

• Registry Run keys created under HKCU\Software\Microsoft\Windows\CurrentVersion\Run pointing to %APPDATA%
• Spawning of rogue system processes with randomized alphanumeric filenames

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_BEEBONE_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Beebone"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "beebone" ascii wide nocase
        $s2 = "beebone" ascii wide nocase
        $s3 = "w32.worm.beebone" ascii wide nocase
        $s4 = "worm.beebone" ascii wide nocase
        $s5 = "aaeh" ascii wide nocase
        $s6 = "vbcrypt" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Beebone (Worm) Execution & Triage
id: 9d049765-278a-5106-8530-4d6f035548ba
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Beebone 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/beebone
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-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.worm
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1091
- attack.t1055
- attack.t1071_001
- attack.t1568_002
- 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_BEEBONE_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Beebone 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 = "beebone" 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 immediately; Beebone's presence guarantees that secondary payloads (like ransomware or banking trojans) are actively downloading.
2. Sinkhole the identified DGA domains at the corporate firewall to sever Beebone's ability to receive updated payloads or commands.
3. Do not attempt manual file deletion; the Beebone/Vobfus symbiotic relationship will instantly restore the deleted files.
4. Given the extreme resilience and polymorphic nature of the threat, performing a clean OS rebuild is the only guaranteed method of eradication.

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 clean if your AV quarantines a single Beebone executable; the partner worm (Vobfus) is likely still active.
2. Avoid plugging any USB drives into the infected machine, as the associated Vobfus worm will immediately infect them.

References & External Analysis

• Europol Press Release - International Police Operation Takes Down Beebone Botnet
• FBI National Press Release - Beebone Botnet Dismantled
• MITRE ATT&CK - Beebone
• Search "beebone" on VirusTotal (External Analysis)
• Search "beebone" on Any.Run (Sandbox Sandbox)
• Search "beebone" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Worm)

Explore other documented threats in the same operational category:

• Benjamin
• Kolab
• Drolnux
• Mabezat
• Chir
• Perinet
• Pluto
• Chindo

Machine-readable

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