Shade

Overview

Shade (also widely tracked in cyber threat intelligence feeds as Troldesh, Encoder.858, and Ransom:Win32/Shade) is a landmark ransomware family that terrorized organizations and individual users worldwide from 2014 until its shutdown in 2020. Propagated through massive malicious spam campaigns distributing weaponized zip archives and exploit kits, Shade deployed robust AES-256 and RSA-2048 encryption to lock victim files, appending recognizable extensions such as .xtbl, .ytbl, .breaking_bad, and .better_call_saul. The ransomware terminated database services, deleted Windows Volume Shadow Copies, and dropped multilingual ransom notes demanding payments in Bitcoin. In an unprecedented event in April 2020, the operators behind Shade announced their retirement, publicly apologized to their victims, and published over 750,000 master decryption keys on GitHub. In collaboration with the No More Ransom initiative, Kaspersky and Europol verified the keys and integrated them into the free ShadeDecryptor tool, allowing all historical victims to recover their data.

Known aliases

Threat reports may refer to this family under multiple names:

• Ransom:Win32/Shade
• Trojan-Ransom.Win32.Shade
• Troldesh
• Encoder.858
• Win32/Troldesh

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: Custom Russian Cybercrime Ransomware Strains

Known Derivatives & Downstream Variants: Troldesh.A · Troldesh.Xtbl · Encoder.858

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:

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

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

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.

• 7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b
• 8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c

Delivery vectors

• invoice_scan.zip
• order_details.exe

Persistence mechanisms

• README_TXT.txt
• HKCU\Software\Microsoft\Windows\CurrentVersion\Run\WindowsSecurityUpdate

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_SHADE_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Shade"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "shade" ascii wide nocase
        $s2 = "ransom:win32/shade" ascii wide nocase
        $s3 = "trojan-ransom.win32.shade" ascii wide nocase
        $s4 = "troldesh" ascii wide nocase
        $s5 = "encoder.858" ascii wide nocase
        $s6 = "win32/troldesh" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Shade (Ransomware) Execution & Triage
id: eac2457c-cac4-5be1-96a4-5535e7115315
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Shade 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/shade
- 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.t1486
- attack.t1490
- attack.t1566_001
- attack.t1547_001
- attack.t1059_003
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_SHADE_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Shade 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 = "shade" 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. Immediately sever the infected endpoint and any mapped network shares from the corporate network to halt the spread of the encryption process.
2. Do NOT reboot the machine immediately; capture a forensic RAM image, as memory analysis may reveal the AES encryption keys if the process is still running.
3. Verify if the specific variant is covered by the public release of the Shade decryption keys (available via NoMoreRansom); decryption may be possible without paying.
4. Initiate disaster recovery protocols using offline, immutable backups if decryption is not possible.

What to Avoid

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

1. Do not connect any external drives or network shares to the infected machine, as the ransomware will immediately attempt to encrypt them.
2. Avoid paying the ransom; the official Shade operators have shut down, and payments will likely go to copycats who cannot provide the key.

References & External Analysis

• Kaspersky Securelist - Shade Ransomware Shuts Down & Releases Master Decryption Keys
• No More Ransom Project (Europol) - ShadeDecryptor Utility
• Search "shade" on VirusTotal (External Analysis)
• Search "shade" on Any.Run (Sandbox Sandbox)
• Search "shade" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Ransomware)

Explore other documented threats in the same operational category:

• Pdxbbkgat9Ci
• Enistery
• Sentinel
• Amgfaohk2Uf
• Typic
• Inrogatio
• Fesber
• Globeimposter

Machine-readable

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