Ransomware Research

About Blocky


Blocky was first discovered in June 2020 in enterprise cloud environments.

Name Blocky
First Seen June 2020


To better understand Blocky, we can trace it’s origins. Below is a snapshot of Blocky’s genealogy.

HiddenTear » Blocky

Behavior of Blocky

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

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

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Characteristics of Blocky

Here are some of the unique characteristics that are helpful to know about Blocky.


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 Blocky ransomware is known to change.


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 Blocky.

File NameREAD_IT.txt


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

Executablesblocky.exe, 1.exe
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