Analysis

  • max time kernel
    141s
  • max time network
    133s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-08-2024 19:58

General

  • Target

    8f81e96f8c96dec003b51826bbd5885f.exe

  • Size

    758KB

  • MD5

    8f81e96f8c96dec003b51826bbd5885f

  • SHA1

    7b8c4ec9a3808eaa32ab07d1608ad275f34adbe3

  • SHA256

    f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4

  • SHA512

    8770f01b013e401a3eef992aa53e7623a0367bf857309fa238781f70f44ef3e1e5697751d2a28b7ff1f35e8fad921b3fbfeb17f3c9724fab786934c8eb8ee8ce

  • SSDEEP

    12288:VI/X+roiofZzZXvGasEKcXm/WThCFrUi/bwV5LYBYH7caEArXMViC53j:gOsiorGLEKT/WThUlbaUYH7lE005

Malware Config

Extracted

Family

djvu

C2

http://securebiz.org/fhsgtsspen6/get.php

Attributes
  • extension

    .rigd

  • offline_id

    gigF2ELYocnMQz77LhEpSoXvtYp2junk9HZFtJt1

  • payload_url

    http://znpst.top/dl/build2.exe

    http://securebiz.org/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. You can get and look video overview decrypt tool: https://we.tl/t-2zbBkO06mv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0335gSd743d

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 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 2 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).

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
    "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5024
    • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
      "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3832
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\ab173fe0-ed69-4e22-85ac-d5f2babfc50c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:3080
      • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
        "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4500
        • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
          "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2840
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2840 -s 568
            5⤵
            • Program crash
            PID:5028
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2840 -ip 2840
    1⤵
      PID:4132
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4336,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=3776 /prefetch:8
      1⤵
        PID:3104

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\ab173fe0-ed69-4e22-85ac-d5f2babfc50c\8f81e96f8c96dec003b51826bbd5885f.exe

        Filesize

        758KB

        MD5

        8f81e96f8c96dec003b51826bbd5885f

        SHA1

        7b8c4ec9a3808eaa32ab07d1608ad275f34adbe3

        SHA256

        f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4

        SHA512

        8770f01b013e401a3eef992aa53e7623a0367bf857309fa238781f70f44ef3e1e5697751d2a28b7ff1f35e8fad921b3fbfeb17f3c9724fab786934c8eb8ee8ce

      • memory/2840-25-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2840-22-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/2840-24-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3832-4-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3832-3-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3832-5-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3832-6-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/3832-19-0x0000000000400000-0x0000000000537000-memory.dmp

        Filesize

        1.2MB

      • memory/4500-27-0x0000000000400000-0x00000000008ED000-memory.dmp

        Filesize

        4.9MB

      • memory/4500-26-0x0000000000400000-0x00000000008ED000-memory.dmp

        Filesize

        4.9MB

      • memory/4500-30-0x0000000000400000-0x00000000008ED000-memory.dmp

        Filesize

        4.9MB

      • memory/5024-2-0x0000000000C60000-0x0000000000D7B000-memory.dmp

        Filesize

        1.1MB

      • memory/5024-1-0x0000000000BA0000-0x0000000000C35000-memory.dmp

        Filesize

        596KB