Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/04/2024, 16:04

General

  • Target

    d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe

  • Size

    803KB

  • MD5

    bd9cc7d219c9c1b402e9e479077eb1fd

  • SHA1

    2b13c4ba018730a0e90c150a44f3e7bc127b465f

  • SHA256

    d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022

  • SHA512

    72fd8443954d232ff385d1b96267f4d651963af97441fe8f8ea0500576bba90617ebe60d881e0ad502c4385db922bcdb0b04ff7893921550ab05ec8a1c5c0d56

  • SSDEEP

    12288:vVZMkz6khHV4cghyGoTNFEFGPpz0R9BjrWafbJHvWID9FX0t5wovL+gCyla66:vVZGoTw20fBPWaVHek0toH

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .uajs

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • payload_url

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

    http://sajdfue.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0859PsawqS

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\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe
    "C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3092
    • C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe
      "C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2188
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\27251b15-e46b-498c-9f7f-d393760feeef" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3588
      • C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe
        "C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4092
        • C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe
          "C:\Users\Admin\AppData\Local\Temp\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4532

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

    f741810cb830974aebab5f43eb80bc43

    SHA1

    1019ffd11ba07f662659b7f244d2743b4b1562c3

    SHA256

    20c4d592f763227cd6ed7fc812ae9d65edd6e046c30a70e7c694c579d9f1580a

    SHA512

    607ca542510b2a90fbade08569e449fdf35673dc4f045c4ca61982666fe2dd694d265835ebe2d90146dfcecedc7f229804c8e235d8eb9ca36f761064522539f4

  • 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

    e0d37cfb478e0788ce7de5c767990144

    SHA1

    c29cd8351dbca58151d553053dee74aedd67a702

    SHA256

    fde2213bfc24ff1af64cb193a97d90206b4fdac1bf03da26bd657d0fcb6f939d

    SHA512

    3ad80e40f01a45523b5d9b8b26852a12de07e368e4092f8b99e48c3e755a738dc01c1070f4dd19b67efd9abd0ef5fb1023bfb30c37310c932f2d9ab61d0acf87

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

    Filesize

    392B

    MD5

    5111374489959d64e55b5e104ab4e5b0

    SHA1

    3f76c62421acef80328923ca9820978cd6b93bad

    SHA256

    b62ebf499608b31b25ae2f5904aaecf658e91a93eff19720ce27672b650fec15

    SHA512

    2c67762ebbdec39d4155b0f98eaf82364516b9d325a89e0f2650ae5ce2babd89bde4b7492501b6d52ac2a484e1e7dfd29e11f2f2201a7c0839520cdb3db82d9e

  • C:\Users\Admin\AppData\Local\27251b15-e46b-498c-9f7f-d393760feeef\d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022.exe

    Filesize

    803KB

    MD5

    bd9cc7d219c9c1b402e9e479077eb1fd

    SHA1

    2b13c4ba018730a0e90c150a44f3e7bc127b465f

    SHA256

    d5893c95779c8c742ae460319ac45f40b0d3d0d4e393875aa680ce0fc0237022

    SHA512

    72fd8443954d232ff385d1b96267f4d651963af97441fe8f8ea0500576bba90617ebe60d881e0ad502c4385db922bcdb0b04ff7893921550ab05ec8a1c5c0d56

  • memory/2188-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2188-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2188-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2188-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2188-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3092-1-0x0000000004AF0000-0x0000000004B82000-memory.dmp

    Filesize

    584KB

  • memory/3092-2-0x0000000004B90000-0x0000000004CAB000-memory.dmp

    Filesize

    1.1MB

  • memory/4092-20-0x00000000049D0000-0x0000000004A63000-memory.dmp

    Filesize

    588KB

  • memory/4532-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-23-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4532-39-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB