Analysis

  • max time kernel
    143s
  • max time network
    128s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 15:49

General

  • Target

    dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe

  • Size

    708KB

  • MD5

    7f3b269130931ecd64e35f048c3a5a45

  • SHA1

    7434c49a3386c9e6efe98e7f5345c922299adf9c

  • SHA256

    dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501

  • SHA512

    b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83

  • SSDEEP

    12288:OOfdNRXlGGDv4r+no5iA8uPurQdPbaeNTL58eGpf8lVnKKZ+2yxu6e:O2HzLnqXPEOjJhN8eGpyKGfy3

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • offline_id

    EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1

  • 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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0872PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 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\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
    "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1100
    • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
      "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2068
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\9cfd3c99-c2d3-4f6f-9f69-d21ec0c8e0ae" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1152
      • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
        "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2176
        • C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
          "C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3928

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

    df80f9ba75076db634761b6132e0d4e3

    SHA1

    07983946fb660752c7cccb2ef82d01ec4c9ecc5d

    SHA256

    d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99

    SHA512

    4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a

  • 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

    6dbb4d5b3897ea5508cdd3ea5b4c3490

    SHA1

    9d97f182e2ca8ab7416be1c4d4b0aaf8b909daeb

    SHA256

    624ef7b397077a26fc2d18514710c6653125b0f128c31045f73ec86fcae336a5

    SHA512

    700f1edd488e3b3c1909bafe07acb8147cd1d65c20867501afc40cd111959a872523e4baba5310e4972e89952370f1c3549bdf0f232f56f4c3c6ab2ada836ca5

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

    Filesize

    392B

    MD5

    0a194bbc022670ac4b84b57daeaa63d2

    SHA1

    258b433fbb958cf8cfae069d528fc6fc41d3f5b6

    SHA256

    0d3b2f4e354baea0cfe160a1771d8d0f622ee365a367ec6d7e7a8164c7f7ed13

    SHA512

    2f9b523f3404cb43460fdac6a2e540811b44906f89b268c95b32c7f6f63f2de943fae60d2da4d9e06861f48531a02da43174dd21abe8b69dd7a62bd45acad323

  • C:\Users\Admin\AppData\Local\9cfd3c99-c2d3-4f6f-9f69-d21ec0c8e0ae\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe

    Filesize

    708KB

    MD5

    7f3b269130931ecd64e35f048c3a5a45

    SHA1

    7434c49a3386c9e6efe98e7f5345c922299adf9c

    SHA256

    dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501

    SHA512

    b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83

  • memory/1100-2-0x00000000041F0000-0x000000000430B000-memory.dmp

    Filesize

    1.1MB

  • memory/1100-1-0x00000000025D0000-0x0000000002669000-memory.dmp

    Filesize

    612KB

  • memory/2068-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2068-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3928-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB