Ransomware Research

About Assembly


Assembly was first discovered in March 2018 in enterprise cloud environments.

Name Assembly
First Seen March 2018


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

HiddenTear » Assembly

Behavior of Assembly

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

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

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Characteristics of Assembly

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


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 Assembly 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 Assembly.

File NameREAD_ME.txt


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

Executablesassembly.exe, 91df5479bfbee3f8664fea6cef45aa4db30619efab1c67238339ca45a0b16881.bin_used

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 Assembly.

External Pages
  • mailto:ransomrust@protonmail.com
How Elastio can help

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