Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-05-2024 12:30

General

  • Target

    54b944ac2d5aa01418d4bd2edf3d8f2c_JaffaCakes118.dll

  • Size

    5.0MB

  • MD5

    54b944ac2d5aa01418d4bd2edf3d8f2c

  • SHA1

    0176822d14a9af9835133c4a0843de632baaa7f4

  • SHA256

    125f6ac932a8434ddb790b25772bb73e07979a4273d9533fd21ac08ca0e93bc4

  • SHA512

    90129729686f50e78a38f731f0aabde6aeac18c448ab6ec3efa7298b0c207b3f014336c7bc51dbcf4095cc09540133df818a9e5751fb8e1b5a25e3ed9c79dcad

  • SSDEEP

    24576:SbLgddQhfdmMSirYbcMNgef0pE7A4kqAH1pNZtA0p+9XE:SnAQqMSPbcBVa8yAH1plA

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (3295) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Executes dropped EXE 3 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Drops file in Windows directory 2 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\54b944ac2d5aa01418d4bd2edf3d8f2c_JaffaCakes118.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2284
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\54b944ac2d5aa01418d4bd2edf3d8f2c_JaffaCakes118.dll,#1
      2⤵
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:3992
      • C:\WINDOWS\mssecsvc.exe
        C:\WINDOWS\mssecsvc.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        PID:2300
        • C:\WINDOWS\tasksche.exe
          C:\WINDOWS\tasksche.exe /i
          4⤵
          • Executes dropped EXE
          PID:3080
  • C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe -m security
    1⤵
    • Executes dropped EXE
    • Modifies data under HKEY_USERS
    PID:820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\mssecsvc.exe

    Filesize

    3.6MB

    MD5

    55d39603be1a94d3a8e4a09ed518f3cf

    SHA1

    3672cd598c6ec464cb3894db55b13fa8af90ae23

    SHA256

    9533bfdc70889f27002f37547ef7b2ab135c436b47013a7a3e346b95eda07e38

    SHA512

    cd8213a61b61522e7c6497e7462b55d8e3ebe979d0e9a121898f5f22177b691d5ef241a47a3cd1cd28d5b1077189d66ad925ed5996bd93e0e99888d32138e2db

  • C:\Windows\tasksche.exe

    Filesize

    3.4MB

    MD5

    d31cd792c7838ba2f502678d4a50337b

    SHA1

    77e59dfa8f916343b65de03566cad285335f443b

    SHA256

    0bb994afc567ca1cac648b29c559069eafe14ec6a2979697428e2446e3750313

    SHA512

    2656de11f96d5e5a11cf52bef79160fce1fed908c0553948e5cdb5869ce7c6f1a73173b8f06433c05e5f89c6c2c35f7c155aaa608145e56f490878d89d9559fd