Analysis

  • max time kernel
    141s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25/01/2024, 04:39

General

  • Target

    73c1f532fb36af32c4bf0396e36a046c.exe

  • Size

    787KB

  • MD5

    73c1f532fb36af32c4bf0396e36a046c

  • SHA1

    50d79516412f9f40ce0c65fef0bacc99ed16361f

  • SHA256

    219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94

  • SHA512

    96d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979

  • SSDEEP

    12288:hksmHsAz1XoTtgdGigT84EbBfo2YRJ2zVGGDMgjT7BX9aokgDHkwB7yBPAi:hk9MtgdGieEbfi4JGQUokgDEwIBPA

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/nddddhsspen6/get.php

Attributes
  • extension

    .moqs

  • offline_id

    CatwRkqdYh2Jomn6DqwFoGgcSbDsle1xlE1NPtt1

  • payload_url

    http://securebiz.org/dl/build2.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-N3p42CffoV 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: 0318ewgfDd

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\73c1f532fb36af32c4bf0396e36a046c.exe
    "C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2080
    • C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
      "C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2916
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\7c02b0c0-3136-4e77-8233-08a2ca25cc53" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1184
      • C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
        "C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2728
        • C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
          "C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2736

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

          819d2f6d228f94bfebac03edbfa4bc64

          SHA1

          257acbdf2270c5285962d10460a77f422143cc8d

          SHA256

          e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47

          SHA512

          b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67

        • 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

          a50bfa043cd6730f71233e1f1eb82d07

          SHA1

          d874c00220588acf9f9d3d12ab32d6da8484b88e

          SHA256

          571944c30b02f033d864fe2717f18319aaaeeaa8c3fab6918a4c83cb9fa078f9

          SHA512

          e3f81410aa3ea5c4c99410b8f374c76af86ab0a296332a00d040558813f82504ce5ec831adc01ab0f4fbf09b7efc7bef8f8162b8a74d63366220ba89d48ea3d5

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

          Filesize

          344B

          MD5

          d7ec9dbf92b76cc2c32440d0ec9970cb

          SHA1

          c5920652a5280b96812d8f2d612cbd6101e281ee

          SHA256

          09cfb151bc405c0210541b64f2a205bb38b99bcb8be1106e6c9013b2c8e685a5

          SHA512

          e357d4036cf2ae5dad93b24f32c2cd29afbcb824c91642559e1712b18bf00d7dbb3127ca2208d8c412ca1f2aeaa0cb139a4a196f63d5f44637df46f27878efdb

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

          Filesize

          392B

          MD5

          05bb2f81e36f97aeba09c18b0489ef0d

          SHA1

          01ada11b01654267961cc060aa6a909093a1d002

          SHA256

          1e94b2321533b2a646e1486ee4f70b613582b52fd6d31828479092e39a6e7cfd

          SHA512

          8c6a57fd1002b29b70e7a41ff0d62e531f24ce611078b4c0db93df6ed0e4087632da9a8b898207281e3f6e0ca3dca5091ae77c5910a54da12e247a81ce2603ad

        • C:\Users\Admin\AppData\Local\7c02b0c0-3136-4e77-8233-08a2ca25cc53\73c1f532fb36af32c4bf0396e36a046c.exe

          Filesize

          787KB

          MD5

          73c1f532fb36af32c4bf0396e36a046c

          SHA1

          50d79516412f9f40ce0c65fef0bacc99ed16361f

          SHA256

          219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94

          SHA512

          96d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979

        • C:\Users\Admin\AppData\Local\Temp\Cab6E3D.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • memory/2080-4-0x0000000002150000-0x000000000226B000-memory.dmp

          Filesize

          1.1MB

        • memory/2080-2-0x0000000000290000-0x0000000000322000-memory.dmp

          Filesize

          584KB

        • memory/2080-0-0x0000000000290000-0x0000000000322000-memory.dmp

          Filesize

          584KB

        • memory/2728-27-0x0000000000320000-0x00000000003B2000-memory.dmp

          Filesize

          584KB

        • memory/2728-29-0x0000000000320000-0x00000000003B2000-memory.dmp

          Filesize

          584KB

        • memory/2728-34-0x0000000000320000-0x00000000003B2000-memory.dmp

          Filesize

          584KB

        • memory/2736-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-59-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-58-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-51-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2736-50-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2916-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2916-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2916-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2916-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2916-26-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB