Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/04/2024, 02:51

General

  • Target

    3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe

  • Size

    771KB

  • MD5

    a63c52af85c756814f48887bd8c50e8d

  • SHA1

    8fcb6f701b995d0c5bb9b8c3d77199a7aaae63ec

  • SHA256

    3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee

  • SHA512

    505dea5fe013e031aab981c6816254977dbcd5c38aae5410f31fb7d40b8b619fa43ad93d467426034926d79386d08ad330ea0711a052c03a843b16186e386596

  • SSDEEP

    12288:/JXZ4iJn1bSWll7DBPyOqZ9v70PTIultZdTL50WV1w2:5Zl7DBKL9uIul/d3G2

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\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
    "C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:848
    • C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
      "C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1672
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0da68bdb-094f-4142-8b7b-6fc14f43802c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4000
      • C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
        "C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3064
        • C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
          "C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4980

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

          580071ebd24cccfd9268e1474bb8134e

          SHA1

          443665efe7009fe1d4c5bc4786dc9cc540e59ef6

          SHA256

          53e3fd53196b53d23b724612cf2704518edf3e979dca02f5674ac419b5f7b461

          SHA512

          13d52455d8a30a0af06c420cd01f13f55efc4c55b59883c5208bf4929352e7b783557bff6a157c4fc71a8e7cbfadf00d55eef8ebef4b984624d8feb116a960a4

        • 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

          294ea7f82150861b5badb98f7504b206

          SHA1

          40efea5e7edee7d570579e7bd4d467726a30545e

          SHA256

          3ddbe6c0381cbdbdefe0c3b35310523affa44236cfcffcb005149eb372ce05ca

          SHA512

          2cc6464e4af4335fc2fdccdf2349a709397ce2df80e296d9013217a336ea7199e213b5c14253ce5bbfd120f41c8af7ea340df3e6551efdbf1048ef4133ecf2ce

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

          Filesize

          392B

          MD5

          709e23b36c9ba509ac708dc9a73e86f9

          SHA1

          6d9aac189ddf3c128d088d6018c3ef902abb91e0

          SHA256

          2827fd8e140ba1393d0f42114eef4dcf361ab88d93e707e107653fe33dec833c

          SHA512

          853446ebf8f6445fd9e07cfd029c641f5fb6899ff095ba9938b53530b221d7af81fb94a9dc5f8bf44271ba6b62bbb928dbd3fba4454cc89dcabf568a4c5b6d2e

        • C:\Users\Admin\AppData\Local\0da68bdb-094f-4142-8b7b-6fc14f43802c\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe

          Filesize

          771KB

          MD5

          a63c52af85c756814f48887bd8c50e8d

          SHA1

          8fcb6f701b995d0c5bb9b8c3d77199a7aaae63ec

          SHA256

          3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee

          SHA512

          505dea5fe013e031aab981c6816254977dbcd5c38aae5410f31fb7d40b8b619fa43ad93d467426034926d79386d08ad330ea0711a052c03a843b16186e386596

        • memory/848-1-0x00000000049E0000-0x0000000004A73000-memory.dmp

          Filesize

          588KB

        • memory/848-2-0x0000000004A80000-0x0000000004B9B000-memory.dmp

          Filesize

          1.1MB

        • memory/1672-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1672-15-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1672-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1672-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1672-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3064-18-0x0000000004880000-0x0000000004914000-memory.dmp

          Filesize

          592KB

        • memory/4980-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-32-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4980-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB