General

  • Target

    90674ff25b01802e2622240c64fa74f2c15b2d26da1782e7f35a56123c89df24

  • Size

    789KB

  • Sample

    220418-rzttnabfhp

  • MD5

    87c720e513db68673a707be7a224bb91

  • SHA1

    8fd449c7d335f99ae9d910b4ac9f5aee09a5f4dd

  • SHA256

    90674ff25b01802e2622240c64fa74f2c15b2d26da1782e7f35a56123c89df24

  • SHA512

    6c88e43cad65f38109d1f36b4dd0d77b6d45d2b297e8438e4364cb5ed82a5545ff4e7230bc6af01c415e5b11593fd2a895cd84ef6019a8d8b17ae449235b92d3

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/fhsgtsspen6/get.php

Attributes
  • extension

    .nuhb

  • offline_id

    PfLhykvDxmCghCq8peuxBtQ3c0QBuANi8WUkuet1

  • payload_url

    http://zerit.top/dl/build2.exe

    http://fuyt.org/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-c565B1ILoZ Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: support@sysmail.ch Reserve e-mail address to contact us: supportsys@airmail.cc Your personal ID: 0453Jbdio

rsa_pubkey.plain

Targets

    • Target

      90674ff25b01802e2622240c64fa74f2c15b2d26da1782e7f35a56123c89df24

    • Size

      789KB

    • MD5

      87c720e513db68673a707be7a224bb91

    • SHA1

      8fd449c7d335f99ae9d910b4ac9f5aee09a5f4dd

    • SHA256

      90674ff25b01802e2622240c64fa74f2c15b2d26da1782e7f35a56123c89df24

    • SHA512

      6c88e43cad65f38109d1f36b4dd0d77b6d45d2b297e8438e4364cb5ed82a5545ff4e7230bc6af01c415e5b11593fd2a895cd84ef6019a8d8b17ae449235b92d3

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

      suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    • Vidar Stealer

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies file permissions

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

System Information Discovery

1
T1082

Tasks