Analysis

  • max time kernel
    147s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/04/2024, 02:25

General

  • Target

    9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe

  • Size

    851KB

  • MD5

    6067c1f7658f5862dcce964ae8a9b049

  • SHA1

    de1c58620017ed7f4c11b5cf00321aa203425b2f

  • SHA256

    9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651

  • SHA512

    5c863b1977ac2e742638d96b9933222b475338b8f79501edd35fded93790ef4f8391896d70f1aa3197a317a3821c06f654af05804e01f23d47c1208a873cf138

  • SSDEEP

    12288:QEO9cG9msbbKVTvHio+ZnIaXNqft+O6j22gfphHTAg1ZEJIrV5tg:nO9esSTknl9qf4i2gnzAb2V5tg

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\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe
    "C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe
      "C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:788
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\9297c677-de07-47c4-8c93-629a13a84af4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3508
      • C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe
        "C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4908
        • C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe
          "C:\Users\Admin\AppData\Local\Temp\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4544

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

    a796999c503d181cf67725ed32be3bfe

    SHA1

    61bed07e1ca6dd7325b65653307671f95cd943bc

    SHA256

    54a3267f8825a4819df16f5448a9829081f9030088a02fa981222b43ec0fb392

    SHA512

    5856964f0d0b6624577ce69751eab308994ef106eaf1de54fa4544caf362f4fbb94f99ceb4f9865746d01a9edce3dcdd685ad3767d761bdbf591ab20ec88081e

  • 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

    6871b34be2256b7e34f1f01de14e0290

    SHA1

    b30a4c79500987d1d932dce9e6457b241263df73

    SHA256

    9b9a7bfd8d11848c451dcadc2eea8fd5d14c9f76af5473f7cbc8648248649952

    SHA512

    8ab70305f7a83dcb63bc2b609a345965e705e4c2be19ecaa5b5b4a648f21c7ea039d6c1a97b1b7d6322b79a925b19159322a9f83f13a07886fbec7500bb45c18

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

    Filesize

    392B

    MD5

    eff8dce19955c6fb01ccfd0708a873ad

    SHA1

    7aec9eab87eadc8089697dfaa13ef53502f3e5d6

    SHA256

    1887e6641c2edc0f74eff7a0541ad57bb8aa15cc3d45f33326c059bdfb126546

    SHA512

    da4d75a8958a653abdbdbf58b557069db4bec3311b72230439e4f180e78736ee5358efd7c0da75373b49bed30438cc65f5776f4935cffd17d2bdaa5fbc50ce21

  • C:\Users\Admin\AppData\Local\9297c677-de07-47c4-8c93-629a13a84af4\9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651.exe

    Filesize

    851KB

    MD5

    6067c1f7658f5862dcce964ae8a9b049

    SHA1

    de1c58620017ed7f4c11b5cf00321aa203425b2f

    SHA256

    9e539d4a2fd02d296f715429a74074fe98d363e0332a41de4e03bcb445d28651

    SHA512

    5c863b1977ac2e742638d96b9933222b475338b8f79501edd35fded93790ef4f8391896d70f1aa3197a317a3821c06f654af05804e01f23d47c1208a873cf138

  • memory/788-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/788-15-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/788-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/788-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/788-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2044-1-0x0000000004B00000-0x0000000004B9C000-memory.dmp

    Filesize

    624KB

  • memory/2044-2-0x0000000004BA0000-0x0000000004CBB000-memory.dmp

    Filesize

    1.1MB

  • memory/4544-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4544-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4908-18-0x0000000004A30000-0x0000000004AC3000-memory.dmp

    Filesize

    588KB