Ransomware Research

About AVCrypt

AVCrypt

AVCrypt was first discovered in March 2018 in enterprise cloud environments. AVCrypt is found in environments with a number of different names, including AVKill, etc. For a full list of all names, please see below.

Name AVCrypt
AKA
  • AVKill
First Seen March 2018
Targeting

Behavior of AVCrypt

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

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

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Characteristics of AVCrypt

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

Prefixes

Some ransomware will change or prepend a prefix to the beginning of the file after they are encrypted. Here are some of the possible prefixes found at the front of a filename that AVCrypt ransomware is known to have.

Prefixes+

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 AVCrypt.

Typefile
File Name+HOW_TO_UNLOCK.txt
LocationEveryFolder

Executables

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

Executablesmyfile.exe, Ransomware_AVCrypt.exe, Sample_5ab64cacdabaeb038fa863ab.exe, av2018.exe, benedikt richter.exe, Admin.exe, Av.exe, a64dd2f21a42713131f555bea9d0a76918342d696ef6731608a9dbc57b79b32f.bin_used, 58.exe
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