Mongolock
Table of Contents
Overview
Ransom:Win32/Mongolock represents a highly specialized and devastating form of extortion that specifically targets unsecured, internet-exposed **MongoDB databases**, rather than individual user files or endpoints. It is a stark reminder of the dangers of cloud misconfigurations. Unlike traditional ransomware that encrypts files in place, Mongolock completely drops (deletes) the victim's databases and replaces them with a single collection containing a ransom demand, often resulting in total, irrecoverable data loss.
Understanding the Mongolock Threat
To an organization, a Mongolock attack is catastrophic. Their web applications suddenly crash, and upon inspecting the database, all customer records and operational data are gone, replaced by a table named `WARNING` demanding Bitcoin. For cloud security architects, Mongolock highlights a failure in basic access control (`T1190`); the database was left exposed to the public internet without authentication enabled.
Execution and Database Wiping Mechanics
Mongolock does not rely on phishing or malware payloads on an endpoint. Instead, attackers use automated scanning scripts (like Shodan or Masscan) (`T1595.002`) to scour the internet for MongoDB instances exposed on default port `27017` with no access controls configured (`T1190`). Once a vulnerable instance is found, the attacker's script connects directly to the database. It executes a command to completely drop (delete) all existing databases and collections (`T1485`). It then creates a new database (often named `READ_ME_TO_RECOVER_YOUR_DATA`) and inserts a single document demanding a ransom payment in cryptocurrency (`T1486`). Crucially, in many Mongolock attacks, the attackers *do not* actually back up the data before deleting it; paying the ransom results in nothing.
Indicators of Compromise & Impact
The impact is immediate, total data loss and massive operational downtime. The primary IoC is the sudden disappearance of all MongoDB collections, replaced by a single ransom note collection. Cloud infrastructure logs (AWS CloudTrail, Azure Activity Log) will show unauthorized inbound connections to port `27017` from unknown IP addresses, followed immediately by massive data deletion commands.
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):
| D3FEND ID | Countermeasure Name | Tactic | Countered ATT&CK | Defensive Guidance |
|---|---|---|---|---|
D3-WORM | Immutable Backup Storage | Harden | T1485 | Store primary backups in Write-Once-Read-Many (WORM) cloud repositories protected by multi-party out-of-band credentials. |
D3-FAED | File Alteration Early Detection | Detect | T1486 | Deploy canary files and monitor mass rename/encryption I/O spikes to terminate ransomware threads immediately. |
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:
Tier 1 Primitive Artifact Rule (Fast Triage)
Matches raw strings and file markers. Vulnerable to binary repacking and simple obfuscation.
rule MALWARE_WIN_MONGOLOCK_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Mongolock"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "mongolock" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Tier 2 Behavioral Context Rule (Process Chains & Sigma)
Tracks parent-child process anomalies and suspicious scripting telemetry. Resilient against file renames.
title: SystemHelpDesk Detection - Mongolock (Ransomware) Execution & Triage
id: 3b7dff8a-4aa4-5f67-9044-ee6b2eb745dc
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Mongolock 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/mongolock
- 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.t1595_002
- attack.t1486
- attack.t1190
- attack.t1485
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: criticalTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_MONGOLOCK_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Mongolock 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 = "mongolock" 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.
- Immediately alter the cloud firewall/Security Group rules to block all public internet access to the MongoDB instance (Port 27017).
- Enable authentication and Role-Based Access Control (RBAC) on the MongoDB instance immediately.
- Do not pay the ransom. Mongolock attacks are frequently automated wipers; the attackers rarely exfiltrate or save the data before deleting it.
- Restore the database from the most recent secure, offline backup taken before the attack occurred.
What to Avoid
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- Do not expose any database (MongoDB, Redis, Elasticsearch) directly to the public internet without strict IP allowlisting and strong authentication.
- Avoid assuming cloud providers secure your data by default; securing database access is a customer responsibility under the Shared Responsibility Model.
References & External Analysis
- Search "mongolock" on VirusTotal (External Analysis)
- Search "mongolock" on Any.Run (Sandbox Sandbox)
- Search "mongolock" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Mongolock and what threat category does it belong to?
Mongolock is classified as a Ransomware. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments.
How does Mongolock establish persistence and evade defensive controls?
Mongolock typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks.
What are the essential incident response steps for mitigating a Mongolock compromise?
Security teams responding to Mongolock should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups.
What cryptographic algorithms and file targeting techniques does Mongolock employ during execution?
Mongolock typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options.
Are decryptors available for Mongolock, and what is the recommended recovery procedure?
Decryption availability for Mongolock depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups.
How do I remove the Mongolock Ransomware from Windows?
Manual removal of Mongolock 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 Mongolock a virus or a Ransomware?
Mongolock is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Mongolock typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Mongolock infection?
Symptoms of Mongolock 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.
Protect Your Network Against Ransomwares
Want to prevent Mongolock and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Containment & Incident Response.
📣 Threat Intel Correction or Update?
Notice an outdated IOC, unlisted alias, or disputed attribution? Threat researchers are invited to propose an update on GitHub or contact the SystemHelpDesk research desk. All community revisions are credited in our public CHANGELOG.
Machine-readable
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