Analysis

  • max time kernel
    144s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2024, 10:50

General

  • Target

    5ce52f628bfa89f48f929961d04fa6c8.exe

  • Size

    730KB

  • MD5

    5ce52f628bfa89f48f929961d04fa6c8

  • SHA1

    aa9c7a0e0721b6cc8a44ef28bd3b23328d8bcb7a

  • SHA256

    7912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10

  • SHA512

    a89eef90f56c652b7821d52b1695cf965cd56bf342f6747ac8bcc75a034f8a137e3ce6c37ed0a0e8ef76a7f26a8dfbab94ada5329836bd8c80a0a57873ab812c

  • SSDEEP

    12288:ldZWyTp94ZIAbE8+zauKD/3P1X8pBSMSjNwsAkDz11YEixpFgqzprF/qDc8FKU1t:5WyTp+ZIAglzatD39X8DSLJ1KfFgqzVx

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 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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 3 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
    "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1200
    • C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
      "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2676
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2972
      • C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
        "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2880
        • C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
          "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2660

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

          b7470a9aa569b259d4c2bb3b80ae3aa3

          SHA1

          093290296b7f1e402ef96e4b33a88f064aa401eb

          SHA256

          ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

          SHA512

          4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

        • 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

          d1622115f5a796a6c720b52a989f76e9

          SHA1

          810749d76c93ce8d53387c9efba28d888f952478

          SHA256

          0db8d6bdd592d4b1fce3fe454e1bf33596408dcf31b0a3d201add22b5ef2b96e

          SHA512

          8e5fe2b776d1b161c6cfffdda6cd5bf305be93698c2ea8b7e1b24b3008630f80b80053c41acab516974eca49f7f93e4116fb8c75d745f891bfb41197de28bf18

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          4b499f67a343129c67c624d17da57982

          SHA1

          73db3745065aeda8fb3c5fbfb9491cfb3b206742

          SHA256

          34f126524ed7efe601693084bbd66c60bae18e114c70272ce918820ac2f909ed

          SHA512

          3a05ba9d8e74753c8419aaff0e9d4c942e3d85c172ceb0864992d1da54ddf464ea6016a2a23cef86e53e22c3ffe589998aeb43755b8494c8d0e6da12bba21ea8

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

          Filesize

          392B

          MD5

          a4c3205e8f9686544632a3d681b0b437

          SHA1

          5b4172c19644e4d3f444e48cd8617ab9521df102

          SHA256

          a13d4bde73db23d7dee8363683fb01a64dab9eeaa348c4f7159dbc2314d33d03

          SHA512

          1ebd6646830a591d256c3cb85d7600608f6c6639fd201b1ea828b85b0f1397024f269eaa037eb1e121949291cc410b30fe35aebd4dd83f0b1001f2cac732cb27

        • C:\Users\Admin\AppData\Local\Temp\Cab88B0.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • C:\Users\Admin\AppData\Local\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e\5ce52f628bfa89f48f929961d04fa6c8.exe

          Filesize

          730KB

          MD5

          5ce52f628bfa89f48f929961d04fa6c8

          SHA1

          aa9c7a0e0721b6cc8a44ef28bd3b23328d8bcb7a

          SHA256

          7912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10

          SHA512

          a89eef90f56c652b7821d52b1695cf965cd56bf342f6747ac8bcc75a034f8a137e3ce6c37ed0a0e8ef76a7f26a8dfbab94ada5329836bd8c80a0a57873ab812c

        • memory/1200-0-0x00000000002D0000-0x0000000000362000-memory.dmp

          Filesize

          584KB

        • memory/1200-1-0x00000000002D0000-0x0000000000362000-memory.dmp

          Filesize

          584KB

        • memory/1200-2-0x00000000045B0000-0x00000000046CB000-memory.dmp

          Filesize

          1.1MB

        • memory/1200-7-0x00000000002D0000-0x0000000000362000-memory.dmp

          Filesize

          584KB

        • memory/2660-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-59-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-58-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-51-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2660-50-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2676-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-9-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2880-31-0x0000000000250000-0x00000000002E2000-memory.dmp

          Filesize

          584KB

        • memory/2880-28-0x0000000000250000-0x00000000002E2000-memory.dmp

          Filesize

          584KB