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Analysis

  • max time kernel
    150s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2025, 20:48

General

  • Target

    JaffaCakes118_9818ef50933565b380ba49b9cc4e6792.exe

  • Size

    204KB

  • MD5

    9818ef50933565b380ba49b9cc4e6792

  • SHA1

    3f5b4d14cf92f96e85f705693fa8f6f1777b2f6f

  • SHA256

    a070bacade7fd6211af1c7cb40a39f74d2860f68903fd441fece210b35f53250

  • SHA512

    0a34e056dc24dc513c46af77ea7b4a94ec09ab78d007aa59edde02a8391056d4b906f962b049115eea9d7ea335d9d82cafd27ef470d1385a344af79069b935a8

  • SSDEEP

    3072:1mIW8b0tQ9nLHbB9W0c1TqECzR/mkSYGrl9ymgYUWzn:sdc4QxL7B9W0c1RCzR/fSmlU

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 27 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_9818ef50933565b380ba49b9cc4e6792.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_9818ef50933565b380ba49b9cc4e6792.exe"
    1⤵
    • Modifies visiblity of hidden/system files in Explorer
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3432
    • C:\Users\Admin\yaauy.exe
      "C:\Users\Admin\yaauy.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:3168

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\yaauy.exe

    Filesize

    204KB

    MD5

    f1a20282365da77c07b29edb102967eb

    SHA1

    a7b3c9ecd18440c85ddd95ef8ac8bbd598f99d06

    SHA256

    a9adedbee4a9e816aaee6188eea5a0b5bf29195b38531b0b15ebbf30f6f27696

    SHA512

    44db3d47a94813cc7e8140d110d285721605c0176f39c8c54ae1850d6623596cebeae6ea388ed6f131ca35acc221893508f4feb543c6389892a92c6d7f896ba3