Type
File Name
Location
MARK was first discovered in May 2025 in enterprise cloud environments.
Name
MARK
First Seen
May 2025
MARK is known to target specific file types. Below are all known file types that MARK is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. MARK updates the last modified date of the file it targets.
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 MARK ransomware is known to change.
Suffixes
.MARK
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 MARK.
Type File Name Location file +README-WARNING+.txt screenshot Desktop
These are the names of the executables that contain the undetonated ransomware payload for MARK.
Executables
mark_visual.exe
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 MARK.
External Pages
