Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-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 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 4 IoCs
  • Suspicious use of WriteProcessMemory 26 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:384
    • C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
      "C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4464
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\7216289e-a0b9-4a19-bc74-ce457b88119a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2252
      • 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:2508
        • C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
          "C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:5104

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

          c9941d5cf26c534c228d97f0c01de1e9

          SHA1

          4548882d5a3fcaccd82656bff3234e3899dbf64f

          SHA256

          de166b42230ec87ed09d1bdd5c4626cb2853050483bbf4a9ed094223e7a451a8

          SHA512

          d33f57520432ad70381dfe93c129e0429e8af4845164b46aa3e51a58b23dc0b477998e9fb5d8ce6d111f983a63f185fff7573b0b3d878afbc1d35457a77261e1

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

          Filesize

          392B

          MD5

          8564bd6cfd3892d143e10503757a7bd4

          SHA1

          31a33abc47656e7a056e24d4117513332a897292

          SHA256

          c67261ea5850439b7421d1a50ba59aae4ddc474fedfb24f0535d94c14405ca27

          SHA512

          c85ea1ef86a36f724b2df071ad3ea025216b000be07269c89f4bf2c31a681fc92d4ad818ab8c1a43d58181ec0d2fadb3b6c0d1ac60ff7b5479a098ad9dbdf20d

        • C:\Users\Admin\AppData\Local\7216289e-a0b9-4a19-bc74-ce457b88119a\73c1f532fb36af32c4bf0396e36a046c.exe

          Filesize

          787KB

          MD5

          73c1f532fb36af32c4bf0396e36a046c

          SHA1

          50d79516412f9f40ce0c65fef0bacc99ed16361f

          SHA256

          219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94

          SHA512

          96d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979

        • memory/384-1-0x0000000002780000-0x0000000002814000-memory.dmp

          Filesize

          592KB

        • memory/384-2-0x0000000002820000-0x000000000293B000-memory.dmp

          Filesize

          1.1MB

        • memory/2508-18-0x0000000002540000-0x00000000025D5000-memory.dmp

          Filesize

          596KB

        • memory/4464-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4464-16-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4464-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4464-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4464-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5104-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB