Ransomware Research
About NK
NK
NK was first discovered in October 2024 in enterprise cloud environments.
| Name | NK |
|---|---|
| First Seen | October 2024 |
Genealogy
To better understand NK, we can trace it’s origins. Below is a snapshot of NK’s genealogy.
| Ryuk.Net » NK |
Targeting
Behavior of NK
NK is known to target specific file types. Below are all known file types that NK is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. NK updates the last modified date of the file it targets.
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Characteristics of NK
Here are some of the unique characteristics that are helpful to know about NK.
Suffixes
Some ransomware will change or append a suffix to the end of the file after they are encrypted, including changing the extension of a file. Here are some of the possible suffixes that NK ransomware is known to change.
| Suffixes | /.[a-z0-9]{4}$/ |
|---|
Ransomware Notes
Not all ransomware leaves a note. However, some ransomware leaves the infected party instructions on what the user should do to get rid of the ransomware, or satisfy the ransom. This often involves transferring money, often bitcoin or another cryptocurrency to a designated wallet.
Below are the type(s) of notes, content, and typical locations where Elastio has found ransom notes from NK.
| Type | file |
|---|---|
| File Name | read_it.txt |
| Location | EveryFolder |
| Type | screenshot |
|---|---|
| Location | Desktop |
Executables
These are the names of the executables that contain the undetonated ransomware payload for NK.
| Executables | 기준.exe, svchost.exe, nkorea_protected.exe |
|---|
How Elastio can help
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Elastio is a cloud-native data resilience platform on AWS, providing robust security and assuring the recoverability of critical data in cloud environments.
Elastio protects data from ransomware and malware evading perimeter defenses and mitigates downtime, data loss, and reputational harm for businesses.
