Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 04:22

General

  • Target

    7c2428bc20c16c8fd744c1216032336e.exe

  • Size

    744KB

  • MD5

    7c2428bc20c16c8fd744c1216032336e

  • SHA1

    eed631c49a30baf635422abbffe2ef95b06eaec0

  • SHA256

    2a8a855ea51edbb8079331fafdb95680727e210756efaa00f2dec1fa60bfe2bb

  • SHA512

    19f63de6c09e3124a685da026e916225ab0949d766df83b38f5eedc17186f34dd83688066b2adfa8158df7b015eeace3a00eb599cd25bde952ae8e653a03fd88

  • SSDEEP

    12288:0YceV2ak78+GXU3yXSaqqKnr8feg7UxcpRbr1JCnoCpHpYBFDq6XwoO:0mV2ak78Pk3MSzvnSB4xcRv1JwoCHYBp

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes
  • extension

    .nooa

  • offline_id

    PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1

  • payload_url

    http://securebiz.org/dl/build2.exe

    http://astdg.top/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-CnI3tI6Ktv 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: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0322gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
    "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3460
    • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
      "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2076
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f99fcc13-dba6-4604-90db-0f8a2f858df1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1252
      • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
        "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4056
        • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
          "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:468

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          b40baee421e93a6145908f67787a291a

          SHA1

          311874de97781222e06810a295e2f78a67b84f81

          SHA256

          25d9d82b04a8a02ccdf9e5980ff2749edcae335faf854d05e24a4a42b35bfa17

          SHA512

          77ceb1d112977f51b89484cbf29c7e299b9e44ba8e8f3daba20cfc71782b2cb1de99c58aaeae4f9741cb13a7389743863927cec42036666e3acf980be2cfd935

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          51e29e936851a4add5c1f45994f2a828

          SHA1

          518a4cd1094a24e2d7640eefeecfaf1ec5928a3e

          SHA256

          7f66936444a6f60559d43943f30514e527c70ea7e92a2dbabef2b7d66a2c8eff

          SHA512

          3350fadcc1c304d2ed1e066a7d2e65b37df4c8724b825f664e3ad12929a772692bf98559adab7d632ad03b8802a7b44922155816bf793a7fdd35b32250129b7f

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          980f47202d291ccf36f00ff5486ad571

          SHA1

          06e3e2d87f5c37742ed92e16283f8cda1b7f4bfc

          SHA256

          c41b8cf7598c867977dbf980b77306f4b69d8ab2958213c2c9c1d84d1fcd2c08

          SHA512

          390f3826d466e0f3f51e03bd7113877085250182f8bb9e7173213adecd2ef6c31a74e4b0b88769df88529cc8d302b72ff01f64bdd76f2888e02b06a9898650b1

        • C:\Users\Admin\AppData\Local\f99fcc13-dba6-4604-90db-0f8a2f858df1\7c2428bc20c16c8fd744c1216032336e.exe

          Filesize

          744KB

          MD5

          7c2428bc20c16c8fd744c1216032336e

          SHA1

          eed631c49a30baf635422abbffe2ef95b06eaec0

          SHA256

          2a8a855ea51edbb8079331fafdb95680727e210756efaa00f2dec1fa60bfe2bb

          SHA512

          19f63de6c09e3124a685da026e916225ab0949d766df83b38f5eedc17186f34dd83688066b2adfa8158df7b015eeace3a00eb599cd25bde952ae8e653a03fd88

        • memory/468-32-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-41-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-39-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/468-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2076-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2076-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2076-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2076-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2076-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3460-2-0x0000000004B50000-0x0000000004C6B000-memory.dmp

          Filesize

          1.1MB

        • memory/3460-1-0x0000000004A50000-0x0000000004AF0000-memory.dmp

          Filesize

          640KB

        • memory/4056-20-0x00000000048F0000-0x000000000498E000-memory.dmp

          Filesize

          632KB