Moleboxultra

Overview

HackTool:Win32/Moleboxultra refers to the detection of a specific commercial software protector and packer, known as MoleBox, which is frequently abused by malware authors. MoleBox is designed to encapsulate an application and all its data files into a single, encrypted executable (`T1027.002`). While legitimate developers use it for DRM and to prevent reverse engineering, attackers use it to hide the true signature and behavior of their malware from antivirus engines.

Understanding Moleboxultra (Packers and Obfuscators)
To an end-user, there is no visible impact. For a SOC analyst, a Moleboxultra detection implies that a highly obfuscated file has entered the environment. The AV engine successfully identified the *wrapper* (the MoleBox packer), but the *actual payload* hidden inside remains unknown until it is unpacked in memory or analyzed dynamically.

Execution and Evasion Mechanics
When a MoleBox-packed executable runs, it acts as a virtual file system. It decrypts the embedded payload directly into memory (`T1027.002`) and executes it without ever writing the unencrypted malicious code to the hard drive (`T1055`). This effectively blinds traditional, static antivirus scanners that rely on file hashes. The payload inside could be anything—from a simple Adware dropper to a devastating Ransomware encryptor.

Indicators of Compromise & Impact
The impact depends entirely on the hidden payload. Host-based IoCs require dynamic analysis. EDR tools will often flag the execution because the unpacking process involves suspicious memory allocations and execution patterns (e.g., a process dynamically allocating memory as `PAGE_EXECUTE_READWRITE` and jumping execution to it). Because MoleBox is a commercial tool, its stub often contains recognizable strings, which is how AV engines flag it heuristically.

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):

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_MOLEBOXULTRA_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Moleboxultra"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "moleboxultra" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Moleboxultra (Ransomware) Execution & Triage
id: c6217770-7616-5e88-82a7-5f2108490a5d
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Moleboxultra malware family. Detects volume shadow copy deletion, boot
  status tampering, and recovery inhibition characteristic of modern ransomware operations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/moleboxultra
- 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.ransomware
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1140
- attack.t1055
- attack.t1027_002
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \vssadmin.exe
    - \wmic.exe
    - \wbadmin.exe
    - \bcdedit.exe
    CommandLine|contains:
    - delete shadows
    - shadowcopy delete
    - resize shadowstorage
    - recoveryenabled no
    - ignoreallfailures
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: critical

rule MALWARE_WIN_MOLEBOXULTRA_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Moleboxultra 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 = "moleboxultra" 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. Ensure the file flagged as Moleboxultra is quarantined and cannot be executed.
2. Submit the quarantined file to a dynamic malware analysis sandbox (like Cuckoo or Any.Run); the sandbox will capture the payload once it unpacks in memory.
3. If the file executed before quarantine, assume the endpoint is compromised and perform a full forensic review of the host's memory.
4. Review email filtering rules if the packed file was delivered via a phishing attachment.

What to Avoid

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

1. Do not dismiss the alert as a 'False Positive' just because MoleBox is a commercial tool; its presence in a non-developer environment is highly suspicious.
2. Avoid attempting to manually reverse engineer the file unless you have specific expertise in unpacking commercial protectors.

References & External Analysis

• Search "moleboxultra" on VirusTotal (External Analysis)
• Search "moleboxultra" on Any.Run (Sandbox Sandbox)
• Search "moleboxultra" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Ransomware)

Explore other documented threats in the same operational category:

• Pcvark
• Genericrxdf
• Vbmod
• Writos
• Conju
• Cjishu
• Rupttass
• Trafog

Machine-readable

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