Analysis

  • max time kernel
    143s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25-04-2024 16:37

General

  • Target

    444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

  • Size

    780KB

  • MD5

    f4c37292b365c19e6d2feeb6a17c4049

  • SHA1

    a7c201719a6c4e58f57baa2a88b110d72f3daefe

  • SHA256

    444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83

  • SHA512

    8436f1f96c2ea3487e1205d2f0dbf8db33fc622a9d863f39402802a8c16bb05897477ba58d57fcb7d7a6bb265c52a25331ac5505dd3ac2c6b3fc2823eb56f805

  • SSDEEP

    12288:6DcWGLixjy0li5QMCgpMeahQ+siBwpBezGbkhvYesVmKiOAfc4Cz9fA1iqCD:6iily4i3CgeSKBtXKiMt9fa8D

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .bgjs

  • offline_id

    Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1

  • payload_url

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

    http://cajgtus.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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 14 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 3 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
    "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
      "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\34d97d37-c09e-4f86-afd8-a408b07b5d7c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2856
      • C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
        "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2420
        • C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
          "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2928

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

    132a59b12289f608ea38eb370d498a8f

    SHA1

    0fd8a23d395d38719cb0b71ee10df56ce35a6c4c

    SHA256

    d6fcf2cd41b542b6d7ee6daa10cf080f4b6220cbce855be03d689d1ad080ed9b

    SHA512

    ea953e93faf4c78e1b9e3768a463f6b46548af00b430ebd275054f7da1e1f4c40746bd3ff4ca02c0fd107bf78b02b67069075939b719c00a7e4bc2f4ecb46da1

  • 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

    9abe123be69d15e43d4ef72b7d0e2df1

    SHA1

    be83e63c1f25a14aa5c13e3697abfd9946698750

    SHA256

    a91eea27a0239e20133a228d8fe9cd8aa5bc397a52f8214c62c8b64857b93d3e

    SHA512

    cb4ca25a8a746e7ab1f641104a03ae793885402b7ac15a465af5cff76645d7b631bee1944362b8fd9ff4a621cd0ba5668ddebcd6a88c27f6899a729b82d23141

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
    Filesize

    344B

    MD5

    600d6c919ee8076a8820e65451ee2812

    SHA1

    37358600d8271904ce1412855762f4a9d39602bb

    SHA256

    cd80bf1669efc8efa3e7548a4de64f1a4f3da44b0b75d9e0c051b0098b925327

    SHA512

    8bebf072c1c6d0445debc518554299d580c49deace771e4f67023d05db570f9cbeb233b3e5b0f3efef23e107dc629e8d32251faa64e4b43e716254af1f086886

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

    392B

    MD5

    98ce0a4a2b732d9e14638217eeff445c

    SHA1

    b979c1bd516da8fce566b2d45eea54596b4820bf

    SHA256

    162a3fead4457145ec43bcd15f0227cf4c1c08f1824fe33add827b58ac88b401

    SHA512

    19ef3530248e5d43e19710fa2a27b42ff75276c9641ea57d650085093bb1b81dfb67328a7b99a6e8d49425f3770d344f1aa9066c958a0b809a7abbb78a8a9a06

  • C:\Users\Admin\AppData\Local\34d97d37-c09e-4f86-afd8-a408b07b5d7c\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
    Filesize

    780KB

    MD5

    f4c37292b365c19e6d2feeb6a17c4049

    SHA1

    a7c201719a6c4e58f57baa2a88b110d72f3daefe

    SHA256

    444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83

    SHA512

    8436f1f96c2ea3487e1205d2f0dbf8db33fc622a9d863f39402802a8c16bb05897477ba58d57fcb7d7a6bb265c52a25331ac5505dd3ac2c6b3fc2823eb56f805

  • C:\Users\Admin\AppData\Local\Temp\Cab4357.tmp
    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • memory/2040-8-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2040-26-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2040-7-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2040-5-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2040-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/2176-2-0x0000000005A20000-0x0000000005B3B000-memory.dmp
    Filesize

    1.1MB

  • memory/2176-1-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/2176-0-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/2420-29-0x0000000004130000-0x00000000041C1000-memory.dmp
    Filesize

    580KB

  • memory/2420-27-0x0000000004130000-0x00000000041C1000-memory.dmp
    Filesize

    580KB

  • memory/2928-35-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-34-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-48-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-49-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-50-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-53-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-55-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-56-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2928-57-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB