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Analysis

  • max time kernel
    101s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/12/2024, 20:15

General

  • Target

    JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe

  • Size

    769KB

  • MD5

    056d464d213ff65349e6206c800434b2

  • SHA1

    6ebe03e781e95744ba7d19f394eb60f4d8656098

  • SHA256

    1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442

  • SHA512

    eb5f366b288031851d027a3771d6765efc43079d3e9bd19159b620fc4e4f51961d8a418a362f399663e5994c2a216eea07454dfa3bf8afb869b81edfd51cde4f

  • SSDEEP

    24576:FNmRKipSS3cb57RjHMNROH2biWBHzZ+YijBu:FNaNcTjMNRjiWtzZfiM

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .tuid

  • offline_id

    LgcOIftV0dQfFBQStVNfb8BhHy8tHRPvXwSiFwt1

  • 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-FglTTmgzZT 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: 0440tOjkfd

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_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3596
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.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:864
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\55af569e-904c-4d80-b731-c4e3472bf5a6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2188
      • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3084
        • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe
          "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3448
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3448 -s 568
            5⤵
            • Program crash
            PID:4392
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 364 -p 3448 -ip 3448
    1⤵
      PID:1952

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\55af569e-904c-4d80-b731-c4e3472bf5a6\JaffaCakes118_1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442.exe

      Filesize

      769KB

      MD5

      056d464d213ff65349e6206c800434b2

      SHA1

      6ebe03e781e95744ba7d19f394eb60f4d8656098

      SHA256

      1d6e9ce9167f2c320b55ac275912423799bd6720d638879a69d493c7b5c7f442

      SHA512

      eb5f366b288031851d027a3771d6765efc43079d3e9bd19159b620fc4e4f51961d8a418a362f399663e5994c2a216eea07454dfa3bf8afb869b81edfd51cde4f

    • memory/864-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/864-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/864-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/864-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/864-17-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3084-19-0x0000000000400000-0x00000000004EC000-memory.dmp

      Filesize

      944KB

    • memory/3084-25-0x0000000000400000-0x00000000004EC000-memory.dmp

      Filesize

      944KB

    • memory/3448-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3448-24-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3448-23-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3596-1-0x0000000000740000-0x00000000007E0000-memory.dmp

      Filesize

      640KB

    • memory/3596-2-0x00000000021F0000-0x000000000230B000-memory.dmp

      Filesize

      1.1MB