Ransomware Research

About BigBossHorse


BigBossHorse was first discovered in January 2020 in enterprise cloud environments. BigBossHorse is found in environments with a number of different names, including Heronpiston, Horsedeal, HorseLeader, XHamster, InHorseWeTrust, etc. For a full list of all names, please see below.

Name BigBossHorse
  • Heronpiston
  • Horsedeal
  • HorseLeader
  • XHamster
  • InHorseWeTrust
First Seen January 2020


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

GarrantyDecrypt » BigBossHorse

Behavior of BigBossHorse

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

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

Learn More

Characteristics of BigBossHorse

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


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 BigBossHorse ransomware is known to change.

Suffixes.heronpiston, .horsedeal, .horseleader, .XHAMSTER, .zipzipulya, .Zhirinovsky, .WhiteHorse, .file.decrypt, .NUNCATARDE, .LIKEAHORSE

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 BigBossHorse.

File Name#Decryption#.txt
File Name#Decrypt#.txt
File Name#File.decrypt#.txt
File Name#RECOVERY#.txt


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

Executablesavgdiagex.exe, AVGDIAGEX.EXE, RedDrip_test_signed, Wmiprvse.exe, Trojan.Ransom.HorseLeader.exe, Trojan.Ransom.GarrantyDecrypt.exe, WMIAPSRVR.EXE, svchosts.exe, encryptor.exe, and.ex_, like_a_horse.bin

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 BigBossHorse.

External Pages
  • mailto:bigbosshorse@ctemplar.com
  • jabber:bigbosshorse@xmpp.jp
  • mailto:heronpiston@ctemplar.com
  • jabber:heronpiston@xmpp.jp
  • jabber:horseleader@xmpp.jp
  • mailto:bigboss@thesecure.biz
  • mailto:file.decrypt@onionmail.org
  • mailto:file.decrypt@yahoo.com
  • icq:@bigbosshorse
  • icq:@Horseleader
  • icq:@xhamster2020
  • icq:@Konwarszawski
  • icq:@SAFEPLACE
  • icq:@zipzipulia
  • icq:@Zhirinovsky
  • icq:@Whitehorsedecryption
  • icq:nuncatarde
  • skype:Zip Zipulya
  • skype:Whitehorsedecryption
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