# UNC4393: threat group profile

> UNC4393 is a threat group. Public reporting about it is still limited. This free profile brings together what is known about it, so you can judge the risk to you. It lists the other names the group goes by and links to every public report behind it.

Canonical page: https://www.edgeprotect.io/threat-actors/unc4393
Breadcrumb: [Home](https://www.edgeprotect.io/) > [Threat groups](https://www.edgeprotect.io/threat-actors) > UNC4393

## At a glance

| Fact | Value |
|---|---|
| Attack techniques | 0 |
| Thought to operate from | Not known |
| Other names | 4 |
| Public reports | 16 |

## Who is UNC4393?

UNC4393 is a threat group. Public reporting about it is still limited.

### Also known as

Storm-1811, CURLY SPIDER, STAC5777, Cardinal

Security companies each give the same group their own name, so one group can have many.

### What public reporting says

> UNC4393 is a financially motivated threat actor primarily using BASTA ransomware. They have been active since early 2022 and have targeted over 40 organizations across various industries. UNC4393 has shown a willingness to cooperate with other threat clusters for initial access and has evolved from using existing tools to developing custom malware. They focus on efficient data exfiltration and multi-faceted extortion, often utilizing tools like COGSCAN and RCLONE for reconnaissance and data theft.

## Public reports about UNC4393

- https://cloud.google.com/blog/topics/threat-intelligence/unc4393-goes-gently-into-silentnight
- https://www.security.com/threat-intelligence/black-basta-ransomware-zero-day
- https://cloud.google.com/blog/topics/threat-intelligence/detecting-disrupting-malvertising-backdoors/
- https://www.microsoft.com/en-us/security/blog/2024/05/15/threat-actors-misusing-quick-assist-in-social-engineering-attacks-leading-to-ransomware/
- https://news.sophos.com/en-us/2025/01/21/sophos-mdr-tracks-two-ransomware-campaigns-using-email-bombing-microsoft-teams-vishing/
- https://www.esentire.com/security-advisories/ongoing-email-bombing-campaigns-leading-to-remote-access-and-post-exploitation
- https://redcanary.com/blog/threat-intelligence/storm-1811-black-basta/
- https://redcanary.com/blog/threat-intelligence/intelligence-insights-june-2024/
- https://x.com/MsftSecIntel/status/1881751635598139714
- https://techcommunity.microsoft.com/blog/microsoftsecurityexperts/phish-click-breach-hunting-for-a-sophisticated-cyber-attack/4267916
- https://services.google.com/fh/files/misc/m_trends_2023_report.pdf
- https://services.google.com/fh/files/misc/m-trends-2024.pdf
- https://x.com/Unit42_Intel/status/1880368272610050459
- https://medium.com/walmartglobaltech/qbot-is-back-connect-2d774052369f
- https://go.crowdstrike.com/rs/281-OBQ-266/images/CrowdStrikeGlobalThreatReport2025.pdf
- https://www.crowdstrike.com/adversaries/curly-spider/

## Frequently asked questions

### Who is UNC4393?

UNC4393 is a threat group. Public reporting about it is still limited.

### How do I know if UNC4393 is a risk to my business?

Create an account and tell us the software you run. We match it against known flaws, including those linked to threat groups, rank each one from 0 to 100 and tell you as soon as we spot something that affects you.

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