# Denim Tsunami: threat group profile

> Denim Tsunami is a threat group thought to operate from Austria. 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/denim-tsunami
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## At a glance

| Fact | Value |
|---|---|
| Attack techniques | 0 |
| Thought to operate from | Austria |
| Other names | 2 |
| Public reports | 3 |

## Who is Denim Tsunami?

Denim Tsunami is a threat group thought to operate from Austria. Public reporting about it is still limited.

### Also known as

KNOTWEED, DSIRF

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

### What public reporting says

> Denim Tsunami is a threat actor group that has been involved in targeted attacks against European and Central American customers. They have been observed using multiple Windows and Adobe 0-day exploits, including one for CVE-2022-22047, which is a privilege escalation vulnerability. Denim Tsunami developed a custom malware called Subzero, which has capabilities such as keylogging, capturing screenshots, data exfiltration, and running remote shells. They have also been associated with the Austrian spyware distributor DSIRF.

## Public reports about Denim Tsunami

- https://www.thezdi.com/blog/2023/1/23/activation-context-cache-poisoning-exploiting-csrss-for-privilege-escalation
- https://socradar.io/threats-of-commercialized-malware-knotweed/
- https://www.microsoft.com/security/blog/2022/07/27/untangling-knotweed-european-private-sector-offensive-actor-using-0-day-exploits/

## Frequently asked questions

### Who is Denim Tsunami?

Denim Tsunami is a threat group thought to operate from Austria. Public reporting about it is still limited.

### Where is Denim Tsunami thought to be based?

Public reporting places Denim Tsunami as operating from Austria. Attribution is never certain: it rests on the tools, infrastructure and targets researchers have seen.

### How do I know if Denim Tsunami 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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