Cerber

Overview

Cerber is an influential, early Ransomware-as-a-Service (RaaS) operation that operated with immense commercial success between February 2016 and late 2017. Developed by Russian-speaking cybercriminals, Cerber was rented out to hundreds of affiliates on underground forums, pioneering high-volume automated distribution models via exploit kits (Rig, Magnitude) and massive spam campaigns driven by Dridex botnet loaders. Cerber achieved widespread notoriety for its aggressive psychological intimidation tactics: upon successfully encrypting local storage with AES-256 and RSA-2048 keys, it dropped a VBScript file that interfaced with the Microsoft Speech API (SAPI.SpVoice) to audibly speak out the ransom demand through the victim machine's speakers. Cerber was also notable for its evasion capabilities: it checked victim keyboards against a hardcoded list of former Soviet Union (CIS) language layouts, terminating immediately if detected. Its command and control mechanism utilized a unique UDP broadcast technique, sending encrypted status datagrams to broad subnet ranges to communicate before redirecting victims to Tor payment portals.

Known aliases

Threat reports may refer to this family under multiple names:

• Cerber
• Cerber3
• Cerber4
• Cerber5
• Cerberus_Ransom

Threat Actor Attribution

Attribution is probabilistic, not a science. Each link below states its confidence level and the evidence behind it.

• Russian-speaking RaaS Operators (Cerber Syndicate) High confidence
  Basis: Operated between 2016 and 2017 as one of the largest Ransomware-as-a-Service syndicates in the world. Engineered by Russian-speaking cybercriminals who enforced a geographic exclusion list (checking for Russian/CIS keyboard layouts via GetKeyboardLayoutList). Famous for pioneering audible text-to-speech ransom notifications via SAPI.SpVoice. [source]

Family Pedigree & Lineage

Malware authors regularly fork and iterate upon existing codebases. Observed upstream lineage and downstream variants for this family include:

Known Derivatives & Downstream Variants: Cerber V1 · Cerber V2 · Cerber V3 · Cerber V4 · Cerber V5

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:

• T1059.005: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.
• T1071.001: Implement web filtering and SSL/TLS inspection to detect malicious command and control (C2) traffic hiding in HTTP/HTTPS.
• 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):

Exploited Vulnerabilities (CVEs)

This malware family is documented weaponizing the following common vulnerabilities and exposures:

• CVE-2016-0189 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).
• CVE-2015-5122 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).

Command & Control (C2) and Network Profile

How this family talks to its operators. C2 traffic can often identify a family even when its code and configuration are hard to analyse. Ports and patterns are historical and change between campaigns, so use them as hunting leads rather than block-only rules.

Network detection ideas

• Detect anomalous outbound UDP packet bursts directed at broad public IP ranges on port 6892
• Inspect process execution for wscript.exe or cscript.exe executing VBScript files referencing SAPI.SpVoice
• Block outbound connections to known Cerber Tor gateway proxy domains

Sources: CISA Alert AA20-302A, Malpedia Cerber

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.

• 0f93a38ce3722b59b48c4cf667b9370cecb393d987d6eec08fdf569da89178bf
• a3b95764d7df7f73db17f18b3dcaecdf0e1fe6b77ae4b0d0092cce53df4a6138

Delivery vectors

• Rig, Magnitude, and Neutrino exploit kits delivering drive-by downloads
• Massive malspam campaigns delivering macro-enabled Word documents via Dridex loaders

Persistence mechanisms

• Startup folder shortcuts or Run registry entries executing randomized payload names from %APPDATA%
• Automated execution of vssadmin.exe delete shadows /all /quiet

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_CERBER_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Cerber"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "cerber" ascii wide nocase
        $s2 = "cerber" ascii wide nocase
        $s3 = "cerber3" ascii wide nocase
        $s4 = "cerber4" ascii wide nocase
        $s5 = "cerber5" ascii wide nocase
        $s6 = "cerberus_ransom" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Cerber (Ransomware) Execution & Triage
id: c7759257-abba-53d4-af35-314f0ed7da6c
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Cerber 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/cerber
- 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.t1204_002
- attack.t1071_001
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_CERBER_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Cerber 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 = "cerber" 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 isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Cerber from spreading laterally or encrypting network-attached storage (NAS) and shared SMB volumes.
2. Preserve volatile system memory (RAM capture) on a representative endpoint before attempting a reboot or power-down, as Cerber symmetric encryption keys or uncompiled payload components may still reside in memory.
3. Audit process execution logs and terminate active scripting interpreters (e.g. PowerShell, CMD, WScript) or commands executing 'vssadmin.exe delete shadows' or 'wbadmin' used by Cerber to inhibit recovery.
4. Investigate the initial compromise vector (such as exposed RDP instances, spearphishing attachments, or vulnerable edge gateways) and enforce an immediate credential reset for all compromised Active Directory accounts.
5. Restore critical assets and databases exclusively from verified, air-gapped, or immutable offline backups once the Cerber binary and related persistence hooks are eradicated.

What to Avoid

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

1. Do not restart or power cycle infected systems prematurely; doing so destroys volatile RAM encryption keys and may trigger bootloader locking logic embedded in Cerber.
2. Avoid negotiating or paying the extortion demand without prior forensic evaluation and consultation with incident response specialists, as payment does not guarantee data recovery.
3. Do not connect clean backup drives or external storage to the affected network until Cerber eradication is completely verified.

References & External Analysis

• Malwarebytes: Ransom.Cerber
• CISA Advisory: CISA Alert AA20-302A (Top Routinely Exploited Vulnerabilities)
• Search "cerber" on VirusTotal (External Analysis)
• Search "cerber" on Any.Run (Sandbox Sandbox)
• Search "cerber" on MalwareBazaar (Malware Samples)

North American Authority Advisory (CISA / NIST)

The Cybersecurity and Infrastructure Security Agency (CISA) has published an official US federal advisory on this family, which can be mapped to NIST Cybersecurity Framework (CSF) incident response controls: CISA Alert AA20-302A (Top Routinely Exploited Vulnerabilities) ↗

Frequently Asked Questions

Related Threats (Category: Ransomware)

Explore other documented threats in the same operational category:

• Filepatch
• Dupate
• Cobalt
• Rubat
• Loveletter
• Liudoor
• E2F3F4D
• Hangup

Machine-readable

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