Saencrypt

Category: ransomware · Aliases: Ransomware.SAEncrypt, Trojan-Ransom.Win32.SAEncrypt, Cryptolocker.SA · Sample count (EMBER 2018): 1 · Enrichment: insufficient_information · Updated: 2026-07-02T07:25:05Z

Category: RansomwareActor: Unknown / CybercriminalIndustry: Global / OpportunisticMotivation: Opportunistic

Overview

Executive Summary

SAEncrypt is a variant of destructive Ransomware designed to infiltrate corporate networks, exfiltrate sensitive data (in double-extortion schemes), and rapidly encrypt critical file systems. Upon successful encryption, the malware renders the victim's data completely inaccessible and demands a cryptocurrency payment in exchange for the decryption key.

Infection Vector and Technical Capabilities

SAEncrypt typically gains access to a network through compromised Remote Desktop Protocol (RDP) connections (via brute-forcing or purchased credentials), malicious phishing attachments, or by exploiting public-facing vulnerabilities on edge devices (like VPN gateways or firewalls). Once inside the network, SAEncrypt executes a devastating attack chain:

Lateral Movement and Privilege Escalation: Before encrypting the local machine, the attackers often manually deploy tools like Cobalt Strike or Mimikatz to dump credentials and move laterally, aiming to compromise the Domain Controller to push the ransomware globally.
Defense Evasion: The malware actively attempts to terminate endpoint security services, disable Windows Defender, and delete Volume Shadow Copies (`vssadmin.exe Delete Shadows /All /Quiet`) to prevent easy data restoration.
Rapid Encryption: It utilizes strong, military-grade cryptographic algorithms (e.g., AES paired with RSA) to encrypt user files, databases, and network shares. The encrypted files are typically appended with a specific extension (e.g., `.saencrypt` or `.encrypted`), and a ransom note is dropped into every affected directory.

Threat Assessment

An SAEncrypt infection is a catastrophic security incident that immediately halts business operations. It poses an existential threat to the organization through severe data loss, extended downtime, potential regulatory fines, and reputational damage.

Incident Response and Remediation

Immediate Network Segmentation: Do not simply turn off the machines, as this destroys volatile memory forensics. Instantly sever the network connection of all infected machines (and the Domain Controller if compromised) from the internet and the rest of the LAN to halt lateral movement and data exfiltration.
Engage Incident Response: Immediately engage specialized third-party Incident Response and legal counsel. Do not attempt to negotiate with the threat actors without professional guidance.
Eradication and Recovery: Eradicating ransomware requires a complete infrastructure rebuild. All affected machines must be wiped to bare metal and rebuilt from known-good, offline backups. All enterprise credentials, especially service accounts and Domain Admins, must be rotated globally.

Known aliases

Threat reports may refer to this family under multiple names:

MITRE ATT&CK Techniques

This family has been observed using the following ATT&CK techniques: T1486 T1490 T1012 T1078

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_SAENCRYPT {
    meta:
        description = "Detects Saencrypt (ransomware)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "saencrypt" ascii wide nocase
        $s2 = "ransomware.saencrypt" ascii wide nocase
        $s3 = "trojan-ransom.win32.saencrypt" ascii wide nocase
        $s4 = "cryptolocker.sa" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Saencrypt Activity
id: 466dc845d1a0d95f1ec44da442a57ef5
status: experimental
description: Detects generic indicators of the saencrypt malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*saencrypt*"
            - "*ransomware.saencrypt*"
            - "*trojan-ransom.win32.saencrypt*"
            - "*cryptolocker.sa*"
    condition: selection
level: medium

References & External Analysis

Search "saencrypt" on VirusTotal (External Analysis)

Frequently Asked Questions

How do I remove the Saencrypt Ransomware from Windows?

Manual removal of Saencrypt 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 Saencrypt a virus or a Ransomware?

Saencrypt is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Saencrypt typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.

What are the main symptoms of a Saencrypt infection?

Symptoms of Saencrypt 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.

Related Families (Category: ransomware)

Explore other malware families in the same category:

Protect Your Network Against Ransomwares

Want to prevent Saencrypt and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Protection Guide.

Need help with an active incident? Published by the SystemHelpdesk team.

Machine-readable

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