Analysis

  • max time kernel
    157s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2024, 05:32

General

  • Target

    16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe

  • Size

    744KB

  • MD5

    a29a054b916c7fb3a6b10e18c54cb9ec

  • SHA1

    bf756199ed02aa04bbfacad49ea51333f6a3a999

  • SHA256

    16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34

  • SHA512

    78b3d4425acc21dbf40e9df6015db6bb9a3729506845e6be3e025027fc6142469b3b353a543c85730ccddb136ef93e85fc9209dc03af3ac667b0006c49c6b43d

  • SSDEEP

    12288:tBWA0WS1K08QHydsNMhhgQnKT310AmvToMJyng+q4hvhyHOaeVoajKZTlReJEKfc:c8XQSdI25KT1+LQnVqUAHOaeVQlgXf

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 6 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 5 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\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
    "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1164
    • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
      "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\43e7840a-21c9-42fc-bdab-d7b91440f774" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2584
      • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
        "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2576
        • C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
          "C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3020
          • C:\Users\Admin\AppData\Local\2b7ab2ed-88c6-4964-a8a9-06d568197a2d\build3.exe
            "C:\Users\Admin\AppData\Local\2b7ab2ed-88c6-4964-a8a9-06d568197a2d\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1760
            • C:\Users\Admin\AppData\Local\2b7ab2ed-88c6-4964-a8a9-06d568197a2d\build3.exe
              "C:\Users\Admin\AppData\Local\2b7ab2ed-88c6-4964-a8a9-06d568197a2d\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:268
              • 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:296
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {DFAF3F0A-70AE-44D1-8190-78824EBC5868} S-1-5-21-3308111660-3636268597-2291490419-1000:JUBFGPHD\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:992
    • 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:2380
      • 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:2456
        • 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:828
    • 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:2088
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:2924

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

          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

          c6a38009c9b224282ddc2f896f9d0128

          SHA1

          95bf9db1ee918b260832ce61f9dfb2d7506c5529

          SHA256

          5571e0e321d1ea8937af5069bd7509c2fe4703fefb83934d0f91948072875b2b

          SHA512

          5da0dac1a6787efc89454d0097dc7df18828262e230cebbb2d7e1846c09a77930fb1fd47e8e03e0456b19d74b229727f9ff497f604cda18da55086b2283cd570

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

          Filesize

          344B

          MD5

          bad67c99a4769705da432b7488ed1cd1

          SHA1

          bbaf567810d534bfca34d26a3651e8a314b1ea89

          SHA256

          8ff4ea4c5d85991d2d3e8cbb22cf9602a3d6c6e6f6968656db5a1cf0f4740342

          SHA512

          253a1e78c70df7cedd2474218faaf5a8ea17384c419a421882ec1ff3bd875bb35286e79f0366ff72b010ed2b81113bc52814c76f57d7d38d8dbd602efc66d5c7

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

          Filesize

          392B

          MD5

          b09eccaca7db53ea18c293b507466dd0

          SHA1

          0f882d04794120f635edf82fba7808ddaa4bfece

          SHA256

          7f4a65ab69bbb4b063ad33f4335ed32662c938c6fa86e037e033b8fa0ce1b670

          SHA512

          4a1cea4137f54815baa8c3a9f604cb0f4490814c6a21019fd38184e0243716433ba9b2ad7018a967e3e6a9785e28a15c85ae5353cc569128873ac1e967e6bad1

        • C:\Users\Admin\AppData\Local\43e7840a-21c9-42fc-bdab-d7b91440f774\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe

          Filesize

          744KB

          MD5

          a29a054b916c7fb3a6b10e18c54cb9ec

          SHA1

          bf756199ed02aa04bbfacad49ea51333f6a3a999

          SHA256

          16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34

          SHA512

          78b3d4425acc21dbf40e9df6015db6bb9a3729506845e6be3e025027fc6142469b3b353a543c85730ccddb136ef93e85fc9209dc03af3ac667b0006c49c6b43d

        • C:\Users\Admin\AppData\Local\Temp\Cab8823.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • \Users\Admin\AppData\Local\2b7ab2ed-88c6-4964-a8a9-06d568197a2d\build3.exe

          Filesize

          299KB

          MD5

          41b883a061c95e9b9cb17d4ca50de770

          SHA1

          1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

          SHA256

          fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

          SHA512

          cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

        • memory/268-80-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/268-73-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/268-77-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/268-82-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1164-0-0x0000000000220000-0x00000000002B1000-memory.dmp

          Filesize

          580KB

        • memory/1164-4-0x00000000004D0000-0x00000000005EB000-memory.dmp

          Filesize

          1.1MB

        • memory/1164-1-0x0000000000220000-0x00000000002B1000-memory.dmp

          Filesize

          580KB

        • memory/1760-74-0x0000000000230000-0x0000000000330000-memory.dmp

          Filesize

          1024KB

        • memory/1760-75-0x00000000003A0000-0x00000000003A4000-memory.dmp

          Filesize

          16KB

        • memory/2028-26-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2028-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2028-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2028-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2028-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-120-0x00000000008D0000-0x00000000009D0000-memory.dmp

          Filesize

          1024KB

        • memory/2380-100-0x0000000000980000-0x0000000000A80000-memory.dmp

          Filesize

          1024KB

        • memory/2576-29-0x00000000004D0000-0x0000000000561000-memory.dmp

          Filesize

          580KB

        • memory/2576-34-0x00000000004D0000-0x0000000000561000-memory.dmp

          Filesize

          580KB

        • memory/2576-27-0x00000000004D0000-0x0000000000561000-memory.dmp

          Filesize

          580KB

        • memory/3020-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-70-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-68-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-50-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3020-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB