Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    16/04/2024, 00:10

General

  • Target

    df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe

  • Size

    851KB

  • MD5

    23e17bc0ed5de8c26fc0d371d64c3b2c

  • SHA1

    a1f40ed9e90a8d55e3a5167b20191291de65b7f5

  • SHA256

    df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6

  • SHA512

    018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b

  • SSDEEP

    12288:gAjaxsJPuYbIw0JGZUqqLXHHsmfw+fflslYuDZNVKlc:bjaLOILJGfqL3OWflsldDTsi

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.

  • 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\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
    "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4560
    • C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
      "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3416
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\caee1f84-39e6-4f6b-87df-f63c9fd36865" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4876
      • C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
        "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5052
        • C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
          "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4136

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

    09d2ec9f18b54b081850fd910f43450a

    SHA1

    e96c8d825fbaa3af0ffc3cd0b8f002ba77fbe6af

    SHA256

    b2f950306537270467db9240417c555d064ce6eba0740b7e50744bc99a4407c5

    SHA512

    5098d1f1b9f6c11f893595d80a70fea5249de949f95845558060c4f56a5f64debb29692b2ccb8ad62431c5351c695f55d378778ec4b75eb5d17977bb2eda057f

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

    Filesize

    392B

    MD5

    39fe7b75f674d2c10ae76a07629595ac

    SHA1

    65475de3143d46835193cead15a839d82c730231

    SHA256

    d935333f61ef10d6923d6bdf0bb9c663ec574ccaf4ec62fc26e9035fb1dc2212

    SHA512

    c5d11be98a779d956a8a93a737c30f52807dfb49171388cfbd0596e59fef9f1745363370c728a610e13ab3fad3eeb74e2cb931f78ecb81d1a09af9c018b41372

  • C:\Users\Admin\AppData\Local\caee1f84-39e6-4f6b-87df-f63c9fd36865\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe

    Filesize

    851KB

    MD5

    23e17bc0ed5de8c26fc0d371d64c3b2c

    SHA1

    a1f40ed9e90a8d55e3a5167b20191291de65b7f5

    SHA256

    df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6

    SHA512

    018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b

  • memory/3416-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3416-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3416-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3416-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3416-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-23-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-39-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4136-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4560-1-0x0000000004C00000-0x0000000004C9E000-memory.dmp

    Filesize

    632KB

  • memory/4560-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp

    Filesize

    1.1MB

  • memory/5052-21-0x0000000004AF0000-0x0000000004B8D000-memory.dmp

    Filesize

    628KB