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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2024, 08:49

General

  • Target

    JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe

  • Size

    770KB

  • MD5

    2158df35900e2a4d4f41e1de55300327

  • SHA1

    6d574428256ab3774dbab19bb51819fcc02f6b13

  • SHA256

    6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1

  • SHA512

    b7c0025a975d4e096a1e3f608f874fb0039049faf43f8a1dc219560ae505ecb49eec40c912245fb1157ee8243023f9a79636918af9f60cbb87801dc8ae8dd38e

  • SSDEEP

    12288:OT4Ml7IXlXCvYhclHw6OrWijG8ckiheT0fhGK3h4zE7TE0Nrn08EVF98+ctJKdNh:6p7nFlH4qijG8fTM/7BNr08ET9sQb4G

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test1/get.php

Attributes
  • extension

    .ghas

  • offline_id

    miqhSGmGE63yWs53FTz0fnp8eCARpnaYE3O3p2t1

  • payload_url

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

    http://fuyt.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-0SLhZxAjRX 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: 0445JIjdm

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu 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\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4440
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.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:640
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c5c17a81-af03-4b2b-9b8a-88e3f0c76431" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:3612
      • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:536
        • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
          "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3652
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3652 -s 568
            5⤵
            • Program crash
            PID:2800
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3652 -ip 3652
    1⤵
      PID:4900

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\c5c17a81-af03-4b2b-9b8a-88e3f0c76431\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe

      Filesize

      770KB

      MD5

      2158df35900e2a4d4f41e1de55300327

      SHA1

      6d574428256ab3774dbab19bb51819fcc02f6b13

      SHA256

      6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1

      SHA512

      b7c0025a975d4e096a1e3f608f874fb0039049faf43f8a1dc219560ae505ecb49eec40c912245fb1157ee8243023f9a79636918af9f60cbb87801dc8ae8dd38e

    • memory/536-25-0x0000000000400000-0x00000000004CA000-memory.dmp

      Filesize

      808KB

    • memory/536-19-0x0000000000400000-0x00000000004CA000-memory.dmp

      Filesize

      808KB

    • memory/640-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/640-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/640-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/640-17-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/640-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3652-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3652-24-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3652-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4440-1-0x0000000000890000-0x0000000000930000-memory.dmp

      Filesize

      640KB

    • memory/4440-2-0x00000000021E0000-0x00000000022FB000-memory.dmp

      Filesize

      1.1MB