Ransomware Research

Nemty

Nemty was first discovered in August 2019 in enterprise cloud environments. Nemty is found in environments with a number of different names, including Nemty, Nemty Revenge 2.0, Nemty Doxware, etc. For a full list of all names, please see below.

Name

Nemty

 

First Seen

August 2019

Targeting

Behavior of Nemty

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

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

Details

Characteristics of Nemty

Suffixes

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 Nemty ransomware is known to change.

Suffixes

.nemty, /._NEMTY_[a-zA-Z0-9]{7}_$/

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 Nemty.

Type

File Name

Location

file

NEMTY-DECRYPT.txt

EveryFolder

file

/^_NEMTY_[a-zA-Z0-9]{7}_-DECRYPT.txt$/

EveryFolder

file

/^NEMTY_[a-zA-Z0-9]{7}-DECRYPT.txt$/

EveryFolder

screenshot

Desktop

Executables

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

Executables

9eenGboYYNXbTO5.exe, Decryptor.exe, Cashback.exe, Cashback.bin, D3BMN70B.exe, 2c41b93add9ac508_ironman.exe, ironman.exe, $RJD3Z6K.TMP, 부당 전자상거래 위반행위 안내.hwp, 이력서_200506(뽑아주시면 최선을 다해서 열심히 하겠습니다)1.exe

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 Nemty.

External Pages

  • http://zjoxyw5mkacojk5ptn2iprkivg5clow72mjkyk5ttubzxprjjnwapkad.onion
  • mailto:elzmflqxj@tutanota.de
  • mailto:helpdesk_nemty@aol.com
  • mailto:csirt@tesorion.nl
  • mailto:spaxl425@protonmail.com
  • mailto:spaxl425@aol.com
  • http://nemty.top/public/pay.php
  • http://nemty.top
  • http://zjoxyw5mkacojk5ptn2iprkivg5clow72mjkyk5ttubzxprjjnwapkad.onion/public/pay.php
  • http://nemty.hk/pay

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