Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-09-2024 09:17

General

  • Target

    f1b8e2c637bf140bc2e3ea4197f37a57_JaffaCakes118.dll

  • Size

    5.0MB

  • MD5

    f1b8e2c637bf140bc2e3ea4197f37a57

  • SHA1

    f4f5227520d3744002abc6f91123dba1d4086074

  • SHA256

    7ebf8807ab9516bdab7a68ce3fb619ea35d3d3286568003e606aeb8193b87137

  • SHA512

    78ca472fda2a4a253f67357177a9fc6b2679131f9d8716f440878bfc799c753fdfeb658089eb4d8627ab4e8d78349cde21c248c2eecc19b1a853fd554a57c851

  • SSDEEP

    98304:TDqPoBORxcSUg6SAEdhvxWa9P593R8yAVp2H:TDqPlxcuZAEUadzR8yc4H

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (3310) 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
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • 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\f1b8e2c637bf140bc2e3ea4197f37a57_JaffaCakes118.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4680
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\f1b8e2c637bf140bc2e3ea4197f37a57_JaffaCakes118.dll,#1
      2⤵
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3808
      • C:\WINDOWS\mssecsvc.exe
        C:\WINDOWS\mssecsvc.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:3160
        • C:\WINDOWS\tasksche.exe
          C:\WINDOWS\tasksche.exe /i
          4⤵
          • Executes dropped EXE
          PID:2060
  • C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe -m security
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    PID:3360

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\mssecsvc.exe

    Filesize

    3.6MB

    MD5

    01e80fa6fb4c35b92c6a17e6e39908b6

    SHA1

    d5815951b9f7c96140bf4a7e05d6d68aef47a3a0

    SHA256

    1a56af0858c11269bd6c2e7813ab8547711ee695967c80c828de73f33c79627d

    SHA512

    5d8881a000ec007dcad303eba65e03eaee1605c32dab250fc693101bd83b10011cd41a7f5805ed49c6c2caf817dfd2832c998ab38866db615a449bd3f523cf70

  • C:\Windows\tasksche.exe

    Filesize

    3.4MB

    MD5

    c67370bff1116518ae392fac1e453d62

    SHA1

    74fd8921bef3675520e2d27f22e9c6eeda79c1c1

    SHA256

    24c6141afaf83d86f78a0fb859e61f27f896dc1c527f59ec10252c735ca2cd90

    SHA512

    a046fabad30d7cc1b57214c82770fc100c26847eb53ce33e94dcac908191a74c31a0e166d28aba6f1d635a6e615cc7976dc7e4cda0e583f668598cb7e2dc4c56