Analysis

  • max time kernel
    298s
  • max time network
    165s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2024, 04:48

General

  • Target

    1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe

  • Size

    838KB

  • MD5

    1f940a42c9441ea89bc4003de7dd477a

  • SHA1

    50d68efbd5390fa9421696fe86a03a893b0b12e4

  • SHA256

    1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9

  • SHA512

    bc393859e58a89701ebdd92bff35d8265ec991ecdc9bcb9db47c246b309b70ae142320092157f74f0ea6b34171034820589d5807a17451a051eeb61d366dad99

  • SSDEEP

    12288:R0+9YhTj9yMkBAONeXiIb/a4jCbKt/uIKfzLkhs34JKywTvcmK:V9YB9GBZNeXj/01zL71TEmK

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 11 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 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
    "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
      "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2140
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f6b62297-b468-4adf-b135-388d3eb83c06" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2752
      • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
        "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1720
        • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
          "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2520
          • C:\Users\Admin\AppData\Local\664e8c4c-7a99-4789-849e-4e8fbdfdd6eb\build3.exe
            "C:\Users\Admin\AppData\Local\664e8c4c-7a99-4789-849e-4e8fbdfdd6eb\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:788
            • C:\Users\Admin\AppData\Local\664e8c4c-7a99-4789-849e-4e8fbdfdd6eb\build3.exe
              "C:\Users\Admin\AppData\Local\664e8c4c-7a99-4789-849e-4e8fbdfdd6eb\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:984
              • 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:2640
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {3377AEA4-88A3-4212-9DFB-2B0F63334E70} S-1-5-21-928733405-3780110381-2966456290-1000:VTILVGXH\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2992
    • 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:2244
      • 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:2324
    • 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:2220
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:2264
    • 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:2788
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:2768
    • 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:300
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        3⤵
        • Executes dropped EXE
        PID:1624
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2316
  • 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"
    1⤵
    • Creates scheduled task(s)
    PID:1668

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

          9b5b5cd2d045b257470ffe7154fff906

          SHA1

          59cc32aafeeedb0b5f7440c20fcb31e5e0b48680

          SHA256

          60fc28a0f7ea8a0e51d09a703ef4376328ca3d1d71e94c4ea282f4b7628d5835

          SHA512

          b9c9747c43bed47c2c7feb6b0d64ae0abb0815335f02e1567e6e60a4d47c7cc0ec9831675171a9a0ebd8a167bc398178586a19f44461b06887a5d17a38664ab8

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

          Filesize

          344B

          MD5

          a81ba02f104fd1706b1438eb692b5a00

          SHA1

          4d279418065022c18173aa1e0317a2ec12493fb5

          SHA256

          72229acc4371239b950b568b9a9a7355c90549d4e1013c8dae3c4e2ebc7e13fb

          SHA512

          f337ae021b7c98e9770003aaf612c1f76c9709c87af744fbf551fdcd1eaff9fd81d5c5ee8174822d468fac964548752a0bcced0882a538e02cd5076083aa140a

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

          Filesize

          392B

          MD5

          39fef77b8a622240c8f056f54343f568

          SHA1

          999fd9e7c78d584069cb285a87cf3a262688bda4

          SHA256

          c03e4d2c426cc7db9b0febfc8af010ee5d0ced497821e1b3a65eb7fc94205e8a

          SHA512

          0851c8f8ab81da7c2644d58eadb7003a383bb442cf402262f0c47f5d92936c00cd07433bd99925e1929c5c41ce6aa04ad1ed368b64863414887c6c58e8e343b8

        • C:\Users\Admin\AppData\Local\664e8c4c-7a99-4789-849e-4e8fbdfdd6eb\build3.exe

          Filesize

          299KB

          MD5

          41b883a061c95e9b9cb17d4ca50de770

          SHA1

          1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

          SHA256

          fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

          SHA512

          cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

        • C:\Users\Admin\AppData\Local\Temp\Cab9637.tmp

          Filesize

          45KB

          MD5

          5436283659e9410ef09e40dacfcce928

          SHA1

          16317c605b333225594dc9fd3d70b726b07016b6

          SHA256

          d1d33f8d3ea0ca2106ab1c966090a2f1bbfd93d8c6f15974f20ef9ff9ea951d8

          SHA512

          6617b9c0ad607ba86997c0ad937ad3ddd43d69e7dc41d9fdec63e6989902c7c2259ff031b51fa17e9eaa06a7de4f7784c3d6163e4f29bd5b5087a119c58d55e4

        • C:\Users\Admin\AppData\Local\f6b62297-b468-4adf-b135-388d3eb83c06\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe

          Filesize

          838KB

          MD5

          1f940a42c9441ea89bc4003de7dd477a

          SHA1

          50d68efbd5390fa9421696fe86a03a893b0b12e4

          SHA256

          1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9

          SHA512

          bc393859e58a89701ebdd92bff35d8265ec991ecdc9bcb9db47c246b309b70ae142320092157f74f0ea6b34171034820589d5807a17451a051eeb61d366dad99

        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

          Filesize

          204KB

          MD5

          7f0dc9abeeebe3e08df9422fba38c90e

          SHA1

          68936de0928f6cf1f805280de70fe1a54dd093fd

          SHA256

          44e0da38c86b39dc15468afc619a073e2b49bd8c324634ddc8a7b24c12a5e650

          SHA512

          b76d93cedf9423dc4eb63d7ec013ec2adea778c6e58e0336bf4cc1893e3b4323700300a0a9a99094ee63d153be4778363347069a4a0baf4c6471904cdfbe29d2

        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

          Filesize

          120KB

          MD5

          82eaf8ab4de63805ea164b4ef8ee1a7c

          SHA1

          80501ddfe8e066958a6ef5310dc515138b32e537

          SHA256

          04e3b54570a5c4b592b8dca28ad1ce33f237a4c329ebc7188440e9d9eff90217

          SHA512

          ba7434e5b3c5514c52833edbc2638df1a5f6791ffbdb3ab648e597bff81edad087918476e0d212f2070610774e775607e620c0f4ba1ca0e70339ef2a56e5cd69

        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

          Filesize

          109KB

          MD5

          e461fbb083298cf2eeb7e9e3a9fe4cc5

          SHA1

          18cb50e7f4903de9fd0ef33b7669769c417f868a

          SHA256

          adbd069d1a07e878be87fe16084a9d652dd0d195e52c0e7aec9f2b0f0504efe4

          SHA512

          08dc0ee8ac2005d5dffebc2a920cb4b78e3ab1d0e372a2e59dd9de55404c92662876aa448cd0da509980e6ad2696aa9f454c13b01d99433f425814f6f0b4856b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

          Filesize

          111KB

          MD5

          d9df99082330063ecde75a95459b70e8

          SHA1

          e65d53fc4bbef19011ee5e719f7e53926c05b724

          SHA256

          0522a62299203a90d3b3d2366537a5cb44494534f3d51b693a77e4d327fed2d7

          SHA512

          212fe25f546f55182655a69981bade2d92e1641ccfa5706ab333bfd47ef8d89e338360995a4e5563a642ceb1bf5ea0dee0c50fd32220d070b70f9c0b09f3e858

        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

          Filesize

          124KB

          MD5

          6dc49fcda4c150dc161931fa44575443

          SHA1

          195ec819dca5cf1cf5d46366225a9e91e5d9da9f

          SHA256

          6ba89d7b8037c23f3245d522ca864199017b870cd33a02c8b6fa7710f4203da6

          SHA512

          e747a4fa47a39bcdec0c53a2c848ba6f71dd5eed911a236e4ce006a460d2e85bd10fd19adf190757e898733b22b52fa3679727340d32588ac5664721cfcd6e04

        • \Users\Admin\AppData\Local\664e8c4c-7a99-4789-849e-4e8fbdfdd6eb\build3.exe

          Filesize

          16KB

          MD5

          b874c8f1a49504d406782bd15a594443

          SHA1

          d9a5d96e2e7c7c536e549638870d85348b654c8d

          SHA256

          a02dccabbce57586a603ee7c8e7b8b1331c5951344d805133a085c54f8feec8c

          SHA512

          24b0fe62f5360e2e0f84030b734901a4a80f417337b493446c3167bc7f95592821937604598e4e83a0f6873e748d45ebb53f2b5cb27bc58fc62ef6895e2ef785

        • memory/300-157-0x0000000000860000-0x0000000000960000-memory.dmp

          Filesize

          1024KB

        • memory/788-73-0x0000000000C30000-0x0000000000D30000-memory.dmp

          Filesize

          1024KB

        • memory/788-75-0x0000000000220000-0x0000000000224000-memory.dmp

          Filesize

          16KB

        • memory/984-81-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/984-79-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/984-76-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1720-29-0x0000000002080000-0x0000000002112000-memory.dmp

          Filesize

          584KB

        • memory/1720-27-0x0000000002080000-0x0000000002112000-memory.dmp

          Filesize

          584KB

        • memory/2036-0-0x0000000000300000-0x0000000000392000-memory.dmp

          Filesize

          584KB

        • memory/2036-1-0x0000000000300000-0x0000000000392000-memory.dmp

          Filesize

          584KB

        • memory/2036-2-0x0000000002240000-0x000000000235B000-memory.dmp

          Filesize

          1.1MB

        • memory/2140-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2140-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2140-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2140-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2140-26-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2220-113-0x0000000000910000-0x0000000000A10000-memory.dmp

          Filesize

          1024KB

        • memory/2244-93-0x0000000000932000-0x0000000000942000-memory.dmp

          Filesize

          64KB

        • memory/2520-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-48-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-69-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-67-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2520-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2788-138-0x0000000000942000-0x0000000000952000-memory.dmp

          Filesize

          64KB