Analysis

  • max time kernel
    300s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2024, 04:50

General

  • Target

    4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe

  • Size

    758KB

  • MD5

    6f83cf92ac13d4f982229e5907dd66d8

  • SHA1

    2d97ea6768afa98cd1d8ba26435f69750b024729

  • SHA256

    4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b

  • SHA512

    9c9e8cc5b718877934429917cf3a200900498462eda756a6567509b7e49635512b867228244a0a863f54130bf8218f67dc037fcaf6adcb1e28002d76368e6e32

  • SSDEEP

    12288:sznNsQjKtYGHis7osbTktOGtFCgd8exs+B7Z0Gh4DD/Pj8HuUAjxgLVLxpjhBxPZ:AsQjKtY4xss2OgFCwtZZv4DD3j8HbAjU

Malware Config

Extracted

Family

djvu

C2

http://habrafa.com/test1/get.php

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://habrafa.com/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-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0844OSkw

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 10 IoCs
  • Loads dropped DLL 2 IoCs
  • 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 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
    "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
      "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2080
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c684e268-3cb5-43e3-8d44-f2ae6f69bfb0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2812
      • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
        "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2732
        • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
          "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2676
          • C:\Users\Admin\AppData\Local\d79654d4-fc7c-4a13-a158-4db3cf606007\build3.exe
            "C:\Users\Admin\AppData\Local\d79654d4-fc7c-4a13-a158-4db3cf606007\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1344
            • C:\Users\Admin\AppData\Local\d79654d4-fc7c-4a13-a158-4db3cf606007\build3.exe
              "C:\Users\Admin\AppData\Local\d79654d4-fc7c-4a13-a158-4db3cf606007\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2156
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Creates scheduled task(s)
                PID:572
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {8B6B2ECB-6370-4A3C-9FED-C99847B1F26E} S-1-5-21-452311807-3713411997-1028535425-1000:OZEMQECW\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2948
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2092
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:568
        • C:\Windows\SysWOW64\schtasks.exe
          /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
          4⤵
          • Creates scheduled task(s)
          PID:2480
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      PID:2124
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:2944
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      PID:2268
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:2016
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      PID:1980
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:2220

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        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

          bdb53c4bb86031a4bd2b0496d7a34b9b

          SHA1

          6bd7906b423370c4e40b5e28ff6255f8a2e0453f

          SHA256

          6ee1f8c0cca2b16598741fa3c9d046bda952d5e70558391584960bd74da24114

          SHA512

          6055e638c53bdbe203e7bfeeac65bc0d3369e888eacd9899dd76f245ff5528a9f423af3e2333d74537fe231a1233b2a17cf002d701cd924acf553df39caf8050

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

          Filesize

          344B

          MD5

          3251dfddf14c93fba31b02b9ad962048

          SHA1

          c59021aa0c3d4e4ca7e28dae33224819174ee338

          SHA256

          ae4510740783cf24770ded8cd3be16f7ed2c157a6614c940f64e5a75d1a7e57d

          SHA512

          6aa646da18d49f3179d77feb637ab272cfa1c2c2c6b57516dc3cdbe29f4979dd0deb62a66ee19b49722517daf0bb8bf94b4b56b0f23cbbed3edc3e77861a7f6e

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

          Filesize

          392B

          MD5

          0cd9af3c51d9e32a2ec7a8524b34b870

          SHA1

          b4100571f2715642adb9d58e56dcf5d09ae065cf

          SHA256

          ce3e67b690fe39c7b9962a49dc9192b370b2a2c32cff485c2627b8b72f053de5

          SHA512

          dc4f4b8b63223531c4e7c4cac7eaded726b8ac6b91dbab092d173b17a368a0c6e83c5be9d1de89d178b06130a81481f69dbe44bf91e9ec8f2f909d2025f50fd0

        • C:\Users\Admin\AppData\Local\Temp\Cab6058.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • C:\Users\Admin\AppData\Local\c684e268-3cb5-43e3-8d44-f2ae6f69bfb0\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe

          Filesize

          758KB

          MD5

          6f83cf92ac13d4f982229e5907dd66d8

          SHA1

          2d97ea6768afa98cd1d8ba26435f69750b024729

          SHA256

          4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b

          SHA512

          9c9e8cc5b718877934429917cf3a200900498462eda756a6567509b7e49635512b867228244a0a863f54130bf8218f67dc037fcaf6adcb1e28002d76368e6e32

        • C:\Users\Admin\AppData\Local\d79654d4-fc7c-4a13-a158-4db3cf606007\build3.exe

          Filesize

          299KB

          MD5

          41b883a061c95e9b9cb17d4ca50de770

          SHA1

          1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

          SHA256

          fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

          SHA512

          cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

        • memory/568-99-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1344-79-0x0000000000220000-0x0000000000224000-memory.dmp

          Filesize

          16KB

        • memory/1344-78-0x00000000009E2000-0x00000000009F3000-memory.dmp

          Filesize

          68KB

        • memory/1980-163-0x0000000000870000-0x0000000000970000-memory.dmp

          Filesize

          1024KB

        • memory/2080-26-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2080-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2080-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2080-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2080-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2092-96-0x0000000000C30000-0x0000000000D30000-memory.dmp

          Filesize

          1024KB

        • memory/2124-119-0x0000000000250000-0x0000000000350000-memory.dmp

          Filesize

          1024KB

        • memory/2156-75-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/2156-80-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/2156-82-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/2268-142-0x0000000000C30000-0x0000000000D30000-memory.dmp

          Filesize

          1024KB

        • memory/2520-0-0x00000000002B0000-0x0000000000341000-memory.dmp

          Filesize

          580KB

        • memory/2520-2-0x0000000001E30000-0x0000000001F4B000-memory.dmp

          Filesize

          1.1MB

        • memory/2520-1-0x00000000002B0000-0x0000000000341000-memory.dmp

          Filesize

          580KB

        • memory/2676-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-69-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-50-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2676-58-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2732-29-0x00000000002C0000-0x0000000000351000-memory.dmp

          Filesize

          580KB

        • memory/2732-27-0x00000000002C0000-0x0000000000351000-memory.dmp

          Filesize

          580KB

        • memory/2732-35-0x00000000002C0000-0x0000000000351000-memory.dmp

          Filesize

          580KB