Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 03:24

General

  • Target

    76423c0da5d1aca1e737da17a2319250.exe

  • Size

    758KB

  • MD5

    76423c0da5d1aca1e737da17a2319250

  • SHA1

    283a5e8ca8c196920b80d6353a1789b205992a8e

  • SHA256

    a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c

  • SHA512

    a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f

  • SSDEEP

    12288:yYyNIBTERFiRGWo/V4l8Jv2kpXCVFiialb09S4Ykp6ZuyBhQxXARwoOtnzM:yIBTJGr4029XVaZ09Nhp6ZuyBexX2Anz

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\76423c0da5d1aca1e737da17a2319250.exe
    "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1200
    • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
      "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1608
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\bf7fd6cc-8d11-4f67-b618-ddcca40f9111" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4156
      • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
        "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1452
        • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
          "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3028

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

          8daed5fecd6b7116eb16ea66eda552e0

          SHA1

          bb2149a2541f11dc4da8df7f4579dd65c341ce8b

          SHA256

          076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71

          SHA512

          eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7

        • 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

          9881bc3503981557e007f5b40e52cc67

          SHA1

          8cdf7fceaf75d08dbc27217829e50bb40d01959e

          SHA256

          2809b34e5219398eaef6d5f55c5b2717fda7bd505b45f8bb0aa7e9d7eab0f434

          SHA512

          79edc28d7d4b3dacac38ffa54361848bbcee7c500351faa776e4a49b05de2ef1467764c497ac07f4727c62c722febf82d1649fa241fb1a46ec6a77c9b76f60ad

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

          Filesize

          392B

          MD5

          3469737ead6e8c93b07d8c82a2fba665

          SHA1

          918f05e993aa7470d5db0e5ab90bec8140793b5d

          SHA256

          6abd32e4ab2ef80e4318d2b21935988ba7ef04a9ad2e9db560e25a4aed19274d

          SHA512

          7d4316509d73cb0086948096afa2ac11c0cbadba247ef75a5ee77344c2639aeea765f42151822ea920d36d33c6cf26408b743cff1bc46589d2622dd128e3f944

        • C:\Users\Admin\AppData\Local\bf7fd6cc-8d11-4f67-b618-ddcca40f9111\76423c0da5d1aca1e737da17a2319250.exe

          Filesize

          758KB

          MD5

          76423c0da5d1aca1e737da17a2319250

          SHA1

          283a5e8ca8c196920b80d6353a1789b205992a8e

          SHA256

          a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c

          SHA512

          a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f

        • memory/1200-1-0x0000000004A40000-0x0000000004ADC000-memory.dmp

          Filesize

          624KB

        • memory/1200-2-0x0000000004BA0000-0x0000000004CBB000-memory.dmp

          Filesize

          1.1MB

        • memory/1452-18-0x00000000049A0000-0x0000000004A37000-memory.dmp

          Filesize

          604KB

        • memory/1608-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1608-16-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1608-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1608-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1608-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3028-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB