Analysis

  • max time kernel
    92s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-07-2024 19:47

General

  • Target

    70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe

  • Size

    810KB

  • MD5

    70f992e73d440fe02244b8fd3962ba61

  • SHA1

    1100fd25b820c64613dd16f8cbf16e9c54cc1287

  • SHA256

    5482bcb0f258027740ffc73b7dba78273bf6a11971152a6354b01db1eb2e6290

  • SHA512

    483d5a51bbc75baefe102d4901ebfbae1ef98c4ca0a78656293d9ca53bbdeee58d084a386b783bbfcf86b867ee4e790d5740024f6cffb9e26e76d6c6ec0e0c88

  • SSDEEP

    12288:3hLzRs8dx/4TZ2vFkRYLFaJFLQLYzleyb1DKohOGzeANRi8CKz3Zhzxp6L:3dRsqKZ2NkRYcnzle21DjhmKzJN36L

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .tisc

  • offline_id

    uFHwN7bjwCkJEeUg8JHISzLqrwudidH8XsPzHDt1

  • 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-1JwFK5rT39 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: 0336gSd743d

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\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4648
    • C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.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:3616
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\6179fbf5-a36a-4630-8238-1d73c3af42cf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:4492
      • C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe
        "C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2284
        • C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe
          "C:\Users\Admin\AppData\Local\Temp\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3324
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3324 -s 584
            5⤵
            • Program crash
            PID:4192
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3324 -ip 3324
    1⤵
      PID:3444

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\6179fbf5-a36a-4630-8238-1d73c3af42cf\70f992e73d440fe02244b8fd3962ba61_JaffaCakes118.exe

      Filesize

      810KB

      MD5

      70f992e73d440fe02244b8fd3962ba61

      SHA1

      1100fd25b820c64613dd16f8cbf16e9c54cc1287

      SHA256

      5482bcb0f258027740ffc73b7dba78273bf6a11971152a6354b01db1eb2e6290

      SHA512

      483d5a51bbc75baefe102d4901ebfbae1ef98c4ca0a78656293d9ca53bbdeee58d084a386b783bbfcf86b867ee4e790d5740024f6cffb9e26e76d6c6ec0e0c88

    • memory/2284-25-0x0000000000400000-0x00000000004D8000-memory.dmp

      Filesize

      864KB

    • memory/2284-19-0x0000000000400000-0x00000000004D8000-memory.dmp

      Filesize

      864KB

    • memory/3324-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3324-24-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3324-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3616-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3616-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3616-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3616-18-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3616-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4648-1-0x0000000000800000-0x000000000089C000-memory.dmp

      Filesize

      624KB

    • memory/4648-2-0x00000000008A0000-0x00000000009BB000-memory.dmp

      Filesize

      1.1MB