Analysis

  • max time kernel
    146s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240704-en
  • resource tags

    arch:x64arch:x86image:win11-20240704-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06/07/2024, 12:14

General

  • Target
    eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe
  • Size 728KB
  • Sample240706-pem49syarr
  • SHA256 eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://cajgtus.com/test2/get.php

Attributes
  • extension

    .waqa

  • offline_id

    Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1

  • payload_url

    http://defgyma.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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0875PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 8 IoCs
  • 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 6 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe
    "C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1164
    • C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe
      "C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1276
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\71ec59ef-1c0d-4357-9e81-98a5df3a8e0f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4448
      • C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe
        "C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1156
        • C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe
          "C:\Users\Admin\AppData\Local\Temp\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2068
          • C:\Users\Admin\AppData\Local\e9291010-51d8-4713-a68d-5eee90066392\build3.exe
            "C:\Users\Admin\AppData\Local\e9291010-51d8-4713-a68d-5eee90066392\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4400
            • C:\Users\Admin\AppData\Local\e9291010-51d8-4713-a68d-5eee90066392\build3.exe
              "C:\Users\Admin\AppData\Local\e9291010-51d8-4713-a68d-5eee90066392\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2696
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Scheduled Task/Job: Scheduled Task
                PID:2956
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2780
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:804
      • C:\Windows\SysWOW64\schtasks.exe
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4904
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1388
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2296
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4740
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1164

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 1KB
        • SHA256 d6b1932822bbd72a8e78c771717d992142348f67d625a42393719fefbe59b0ed
        • MD5 SHA1 SHA512

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
        • Size 436B
        • SHA256 5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f
        • MD5 SHA1 SHA512

        8B2B9A00839EED1DFDCCC3BFC2F5DF12

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
        • Size 174B
        • SHA256 392993e7175cc4bce3cab083f2016d2ce50c953523502f208bb48df9e2adcfbe
        • MD5 SHA1 SHA512

        B46811C17859FFB409CF0E904A4AA8F8

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
        • Size 170B
        • SHA256 02a503cc830e203a0ff5d9126df777699edbd96eae7a9c271c4cbf306e10e384
        • MD5 SHA1 SHA512

        eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe

        • Path C:\Users\Admin\AppData\Local\71ec59ef-1c0d-4357-9e81-98a5df3a8e0f\eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78.exe
        • Size 728KB
        • SHA256 eda25d91a02fafb1a3ece6bfd943ba34693e6a67f75ad492ff13a5f36cdf5c78
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\e9291010-51d8-4713-a68d-5eee90066392\build3.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        memory/1164-1-0x0000000004720000-0x00000000047B3000-memory.dmp

        memory/1164-4-0x00000000048A0000-0x00000000049BB000-memory.dmp

        memory/1276-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1276-21-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1276-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1276-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1276-2-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-32-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-31-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-38-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-39-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-54-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2068-64-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2696-57-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/2696-59-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/2696-61-0x0000000000410000-0x0000000000413000-memory.dmp

        memory/2696-62-0x0000000000400000-0x0000000000406000-memory.dmp