Ransomware Research

Dark 101

Dark 101 was first discovered in January 2025 in enterprise cloud environments.

Name

Dark 101

 

First Seen

January 2025

Targeting

Behavior of Dark 101

Dark 101 is known to target specific file types. Below are all known file types that Dark 101 is known to infect.

In some cases, ransomware will update the modified date, when it encrypts files. Dark 101 updates the last modified date of the file it targets.

Details

Characteristics of Dark 101

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 Dark 101 ransomware is known to change.

Suffixes

/.[0-9a-z]{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 Dark 101.

Type

File Name

Location

file

Dark101_read_it.txt

EveryFolder

screenshot

Desktop

Executables

These are the names of the executables that contain the undetonated ransomware payload for Dark 101.

Executables

adobe_photoshop2025.exe

External Pages

Ransomware often links to external pages such as payment pages, telegram contacts, etc. Below are some of the URLs Elastio has found to be associated with Dark 101.

External Pages

  • mailto:dark101a@proton.me

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