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MalwareRansomwareUsed by 12 actorsExploits 15 CVEs

BlackCat

Also known asALPHVALPHV/BlackCatNoberus

BlackCat, also known as ALPHV, ALPHV BlackCat, and Noberus, is a ransomware strain and ransomware-as-a-service (RaaS) operation active from at least late 2021. The provided content states it was used to attack and extort hundreds of institutions worldwide and was tied to more than 1,000 victims over an 18-month period. Reported victim sectors and targeting include healthcare, manufacturing, education, entertainment, hospitality, energy, government facilities, emergency services, defense industrial base companies, schools, law firms, financial firms, universities, and other enterprises globally.

The malware is associated with the ALPHV/BlackCat ransomware group and its affiliates, including Scattered Spider / UNC3944 / Octo Tempest / Muddled Libra. The content also links BlackCat activity to DEV-0504 in energy-sector intrusions and notes that operators and affiliates collaborated with both Russian-speaking and English-speaking actors. BlackCat was described as one of the first high-profile examples of triple-extortion ransomware, and multiple references describe double- or multiple-extortion behavior involving data theft, encryption, and leak-site pressure.

Observed behavior in the content includes deletion of Volume Shadow Copies using vssadmin.exe delete shadows /all /quiet and wmic.exe Shadowcopy Delete, as well as modification of boot recovery settings using bcdedit /set {default} recoveryenabled No to inhibit recovery. BlackCat can also use wmic.exe on compromised networks, including for shadow-copy deletion. The content further states that BlackCat broadcast NetBIOS Name Service messages to search for servers on compromised networks, and that related intrusion activity commonly involved lateral movement using stolen credentials and standard ransomware encryption routines. In broader intrusion chains associated with affiliates, WMI/WMIC, Impacket, remote management tools, and data exfiltration were used.

The content links BlackCat to major extortion incidents and law-enforcement actions. It was used in attacks against organizations such as MGM Resorts and Caesars Entertainment via Scattered Spider affiliates, and ALPHV directly claimed attacks against Norton Healthcare, Fidelity National Financial, and Tipalti. U.S. authorities described ALPHV/BlackCat as the second-most prolific ransomware-as-a-service group globally, with global losses in the hundreds of millions of dollars. The FBI and international partners infiltrated and disrupted ALPHV infrastructure, seized multiple websites, and developed a decryptor that reportedly helped dozens of victims restore systems and avoid about $68 million in ransom payments; the decryptor was said to be available to more than 500 victim organizations.

The content also notes criminal cases involving BlackCat operators and affiliates, including U.S. indictments and guilty pleas tied to deployment of BlackCat ransomware against U.S. victims in sectors such as medical devices, pharmaceuticals, healthcare, engineering, and drone manufacturing. Infection vectors mentioned in the content include social engineering and credential theft by affiliates, phishing, MFA fatigue, SIM swapping, valid-account abuse, and initial-access malware such as Nitrogen that enabled later BlackCat deployment. High-confidence aliases from the content are ALPHV, ALPHV BlackCat, and Noberus.

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EXPLOITED CVES

Vulnerabilities exploited

15 CVEs Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.

15 CVES
CVE-2022-24521Windows Common Log File System Driver Elevation of PrivilegeExploited in the wild

An analysis of ‘exp.exe’ indicated that it is a privilege escalation tool based on the exploitation of CVE-2022-24521 – a vulnerability in the Windows Common Log File System (CLFS) Driver, known to be used by several ransomware groups.

via sygniasygnia.co
CVE-2021-34527PrintNightmareExploited in the wild

Afin de se latéraliser, les opérateurs du MOA ont tenté, sans succès, d’exploiter les vulnérabilités PrintNightmare (CVE-2021-34527), BlueKeep (CVE-2019-0708), puis ZeroLogon (CVE-2020-1472) via l’outil Mimikatz.

via cert ssicert.ssi.gouv.fr
CVE-2021-27878Arbitrary Command Execution via Flawed SHA Authentication in Veritas Backup Exec AgentExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-27876Arbitrary File Access via Flawed SHA Authentication in Veritas Backup Exec AgentExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-26858Microsoft Exchange Server post-auth arbitrary file write (ProxyLogon)Exploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-26857Microsoft Exchange Unified Messaging insecure deserialization RCEExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-34473ProxyShell pre-auth SSRF/authentication bypass in Microsoft Exchange AutodiscoverExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-27065ProxyLogon post-auth arbitrary file write in Microsoft Exchange ServerExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-27877Authentication bypass in Veritas Backup Exec Agent via legacy SHA authenticationExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2018-13379Fortinet FortiOS SSL VPN Path Traversal Arbitrary File ReadExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2016-0099Secondary Logon Elevation of Privilege VulnerabilityExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-26855ProxyLogon SSRF in Microsoft Exchange ServerExploited in the wild

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-34523Microsoft Exchange PowerShell Backend Elevation of Privilege (ProxyShell)

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2021-31207Post-auth arbitrary file write in Microsoft Exchange Server (ProxyShell)

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
CVE-2024-37085VMware ESXi Active Directory Integration Authentication Bypass

Ransomware groups—including BlackCat/ALPHV, Black Basta, RansomHub, and Dark Angels—are increasingly targeting VMware ESXi...

via huntio blogblog.alphahunt.io
THREAT ACTORS

Groups observed using it

12 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

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Scattered Spider

The 2023 Muddled Libra (operators of ALPHV aka BlackCat ransomware) campaign against entertainment organizations demonstrated that the hospitality stack is a target for ransomware operators.

via palo alto networks unit 42 blogunit42.paloaltonetworks.com
Vanilla Tempest

Vanilla Tempest ... has frequently targeted sectors, including education, healthcare, IT, and manufacturing, using various ransomware strains such as BlackCat, Quantum Locker, Zeppelin, and Rhysida.

via bleeping computerbleepingcomputer.com
BlackCat

The activities were ultimately identified as a financial extortion attack executed by the BlackCat (ALPHV) ransomware group or one of its affiliates, and included a massive data exfiltration.

via sygniasygnia.co
WIZARD SPIDER

DEV-0504 was responsible for deploying BlackCat ransomware in companies in the energy sector in January 2022.

via microsoft generalmicrosoft.com
Velvet Tempest

DEV-0504 was responsible for deploying BlackCat ransomware in companies in the energy sector in January 2022.

via microsoft generalmicrosoft.com
Nitrogen

Nitrogen was first observed in 2023, using ALPHV, one of the most prevalent ransomware variants at that time.

via cyberscoopcyberscoop.com
Storm-0501

...delivering various ransomware payloads over the years, including Hive, BlackCat (ALPHV), Hunters International, LockBit, and Embargo ransomware.

via the hacker newsthehackernews.com
BlackCat ransomware group

"BlackCat, also called ALPHV and Noberus, is the first Rust-language-based ransomware strain spotted in the wild."

via the hacker newsthehackernews.com
ShadowSyndicate

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
FIN8

FIN8 has deployed ransomware such as Ragnar Locker, White Rabbit, and attempted to execute Noberus on compromised networks.

via mitre attackattack.mitre.org
Cicada3301

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
UNC4466

“Alphv (AKA BlackCat, Noberus) is a ransomware variant that has been active since at least November 2021 and operates using the double extortion method – where victim data is stolen and leaked if a ransom is not paid. Alphv operates as a RaaS…”

via blackpoint cyberblackpointcyber.com
MITRE ATT&CK

Techniques & procedures

22 distinct techniques documented for this family, organized by ATT&CK tactic.

Reconnaissance

2 techniques
T1592.001HardwareEvidence1

The Scattered Spider actors affiliated with BlackCat are also known to use the ransomware gang's data leak site as part of their extortion attempts, where they leak data or issue statements.

T1598.004Spearphishing VoiceEvidence1

Scattered Spider is a cyber gang linked to SIM swapping, fake IT calls, and ransomware crews like ALPHV... DiMaggio listened in on this call, which was one of the group's recent attempts to infiltrate American retail organizations.

Initial Access

1 technique
T1133External Remote ServicesEvidence1

The affiliate then gained access to the victim's network to steal data and deploy the ransomware to encrypt data and leave a ransom note.

Execution

4 techniques
T1047Windows Management InstrumentationEvidence1
TacticExecution

The content repeatedly describes threat actors and malware using WMI/WMIC/wmiexec for remote execution, lateral movement, discovery, persistence, and administrative actions; e.g., 'APT41 used WMI in several ways, including for execution of commands via WMIEXEC as well as for persistence via PowerSploit' and 'Scattered Spider used Windows Management Instrumentation (WMI) to move laterally via Impacket.'

T1059Command and Scripting InterpreterEvidence1
TacticExecution

knowingly caused the transmission of a program, information, code, and command, and, as a result of such conduct, intentionally caused damage without authorization to a protected computer

T1059.003Windows Command ShellEvidence2
TacticExecution

During the 2016 Ukraine Electric Power Attack, Sandworm Team used the xp_cmdshell command in MS-SQL. During the 2025 Poland Wiper Attacks, the adversaries leveraged PsExec to run cmd.exe commands on multiple victim machines. Numerous malware families and groups are described as using cmd.exe, cmd /c, Windows command shell, or command-line interfaces to execute commands, payloads, reconnaissance, persistence, cleanup, and ransomware actions.

T1059.004Unix ShellEvidence1
TacticExecution

Counsel said that a page on the darkweb, a collection of websites that can only be accessed by a specific browser, was located where the ransom demands were outlined.

Persistence

2 techniques
T1112Modify RegistryEvidence2

The content repeatedly describes threat actors and malware modifying, creating, deleting, or storing data in Windows Registry keys and values for persistence, configuration storage, defense evasion, credential access, privilege escalation, and execution.

T1133External Remote ServicesEvidence1

The affiliate then gained access to the victim's network to steal data and deploy the ransomware to encrypt data and leave a ransom note.

T1112Modify RegistryEvidence2

The content repeatedly describes threat actors and malware modifying, creating, deleting, or storing data in Windows Registry keys and values for persistence, configuration storage, defense evasion, credential access, privilege escalation, and execution.

Discovery

1 technique
T1082System Information DiscoveryEvidence1
TacticDiscovery

The content repeatedly describes malware and threat actors collecting host details such as OS version, hostname, architecture, CPU, memory, BIOS, domain, language, and other configuration data; e.g., "APT41 uses multiple built-in commands such as systeminfo and net config Workstation to enumerate victim system basic configuration information."

Lateral Movement

2 techniques
T1021Remote ServicesEvidence1

After establishing a foothold on the network, Scattered Spider uses a range of publicly available software tools for reconnaissance and lateral movement, including ... Screenconnect ... Splashtop ... Teamviewer ... Tailscale ... Ngrok

T1021.001Remote Desktop ProtocolEvidence1

According to the Shodan search engine, the two hostnames were associated with thousands of internet-facing devices exposing RDP services (TCP port 3389) in December 2025.

T1071Application Layer ProtocolEvidence1

The infrastructure commonly supports ransomware command and control (C2) servers, malware distribution, phishing campaigns, botnet management, and data exfiltration staging.

T1105Ingress Tool TransferEvidence2

Most recently, IcedID has reportedly been used to download and execute Quantum Locker ransomware... Emotet is being used to load Quantum and ALPHV ransomware... and is being used to load and execute IcedID.

Exfiltration

3 techniques
T1041Exfiltration Over C2 ChannelEvidence2

A new tactic observed in the threat group’s recent attacks is data exfiltration and file encryption using the ALPHV/BlackCat ransomware, followed by communication with the victims ... to negotiate a ransom payment.

T1537Transfer Data to Cloud AccountEvidence2

The affiliate then gained access to the victim's network to steal data and deploy the ransomware to encrypt data and leave a ransom note.

T1567Exfiltration Over Web ServiceEvidence2

The victim was directed to the ALPHV BlackCat panel hosted on the dark web where the victim could communicate with the ransomware group to negotiate the ransom.

Impact

5 techniques
T1486Data Encrypted for ImpactEvidence16
TacticImpact

The 2023 Muddled Libra (operators of ALPHV aka BlackCat ransomware) campaign against entertainment organizations demonstrated that the hospitality stack is a target for ransomware operators

T1490Inhibit System RecoveryEvidence3
TacticImpact

Examples include 'Avaddon uses wmic.exe to delete shadow copies,' 'BlackCat can use wmic.exe to delete shadow copies on compromised networks,' and 'WannaCry utilizes wmic to delete shadow copies.'

T1499Endpoint Denial of ServiceEvidence1
TacticImpact

BlackCat was one of the first high-profile examples of triple extortion ransomware. Along with encryption and data extortion, it used a third technique: adding DDoS components to the attack.

T1565.001Stored Data ManipulationEvidence1
TacticImpact

MARTINO also provided confidential information regarding ransomware negotiations to ALPHV BlackCat co-conspirators while employed at Company 1 as a ransomware negotiator.

T1657Financial TheftEvidence6
TacticImpact

In one instance, the three men extorted a victim for roughly $1.2 million in Bitcoin and then split the proceeds. | Starting in April of that year, while working as a negotiator on behalf of five ransomware victims, Martino shared confidential information with BlackCat attackers about his clients’ positions and strategies to help maximize their ransom payments. That information included details such as victims’ insurance policy limits and other internal negotiation positions.

Other

1 technique
T1656ImpersonationEvidence1

A Muddled Libra-style social-engineering campaign against a major host-city hotel operator collapses room access, mobile check-in and PoS for 48-72 hours

INDICATORS OF COMPROMISE

IOCs tracked for this family

106 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.

View more in app
Network
11 tracked

IPs, domains, and DNS infrastructure linked to this family.

Hashes
95 tracked

File hashes (MD5, SHA-1, SHA-256) from samples and reports.

TypeValueLatest sighting
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What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets match these IOCs, which detections are missing, which campaigns to expect next, and what to do in the next 30 minutes.
IOC matching106

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution12

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities15

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping22

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.