Tovicrypt

Overview

Ransomware:Win32/Tovicrypt is a generic detection applied to a variety of simpler, often commercially available or 'script-kiddie' level crypto-ransomware variants. While it may not possess the advanced network propagation or EDR evasion techniques of apex predators like Ryuk or Conti, it is still highly effective at its core objective: encrypting the victim's data and demanding payment.

Understanding Tovicrypt (Commodity Ransomware)
To an end-user, a Tovicrypt infection results in the immediate loss of access to their personal or business files. Documents, photos, and databases are encrypted (`T1486`), their extensions are changed, and a ransom note (usually a `.txt` or `.html` file) is dropped on the desktop demanding Bitcoin. For an incident response team, this detection indicates a failure of initial defenses (phishing filters or RDP security).

Execution and Encryption Mechanics
Tovicrypt variants are typically delivered via mass phishing campaigns (`T1566.001`), exploit kits, or by attackers brute-forcing exposed Remote Desktop Protocol (RDP) servers (`T1133`). Upon execution (`T1204.002`), the ransomware quickly iterates through local drives and mapped network shares (`T1083`). It utilizes standard cryptography APIs (like Microsoft CryptoAPI) to encrypt files. To ensure the victim cannot easily recover, it almost always executes a command to delete the Windows Volume Shadow Copies (`vssadmin.exe Delete Shadows /All /Quiet`) (`T1490`). It communicates with its C2 server to transmit the generated encryption key.

Indicators of Compromise & Impact
The impact is significant data loss and operational downtime. Host-based IoCs include the rapid modification of files, the presence of ransom notes in every affected directory, and the execution of `vssadmin.exe` or `wbadmin.exe`. Network IoCs may include HTTP POST requests to suspicious domains transmitting the victim's machine ID and encryption keys.

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to the MITRE ATT&CK framework:

Tactical Mitigations

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

• T1566.001: Scan email attachments for malicious macros, scripts, or suspicious archive files.

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_TOVICRYPT {
    meta:
        description = "Detects Tovicrypt (ransomware)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "tovicrypt" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Tovicrypt Activity
id: 355834d39c83f49d6cf1a1072aa8a856
status: experimental
description: Detects generic indicators of the tovicrypt malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*tovicrypt*"
    condition: selection
level: medium

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Immediately disconnect the infected endpoint from the network to prevent the ransomware from encrypting accessible network shares.
2. Do not reboot the machine if the encryption process is still ongoing, as encryption keys might be temporarily recoverable from RAM.
3. Identify and secure all offline backups to ensure they have not been compromised.
4. Wipe the infected machine and restore it from a known clean image and verified backup data.

What to Avoid

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

1. Do not pay the ransom; it funds criminal activity and there is no guarantee the attacker will provide a working decryption key.
2. Avoid reconnecting the machine to the network until it has been completely wiped and re-imaged.

References & External Analysis

• Search "tovicrypt" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: ransomware)

Explore other malware families in the same category:

• Litmus
• Krolol
• Archsms
• Genericrxgb
• Bumat

Machine-readable

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