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Analysis

  • max time kernel
    119s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/11/2024, 00:38

General

  • Target

    2f55fc03f2d2b24ef7a91e1735d53476e78e425f68b6389abb61324fe07ad3c7.exe

  • Size

    168KB

  • MD5

    1e51f1490f447692da67d1518074b07a

  • SHA1

    6f5072d0895787fa676369695c256ee5e08bb1d7

  • SHA256

    2f55fc03f2d2b24ef7a91e1735d53476e78e425f68b6389abb61324fe07ad3c7

  • SHA512

    708bb5ce72376e35ea2617ce582f1d850b5c1d02e8da0cbce22ed606717d74fedb567ddad0d0a30c01fc87b69248d4281677d80a123fde72c53a10609ef727cb

  • SSDEEP

    1536:2yP6gbdc30f8kX8PsHy244nDUnBC2U6ge:V6gbdcEf8kX8PsHy244nDUnBC28e

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 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 50 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 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2f55fc03f2d2b24ef7a91e1735d53476e78e425f68b6389abb61324fe07ad3c7.exe
    "C:\Users\Admin\AppData\Local\Temp\2f55fc03f2d2b24ef7a91e1735d53476e78e425f68b6389abb61324fe07ad3c7.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2548
    • C:\Users\Admin\yaobif.exe
      "C:\Users\Admin\yaobif.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
      • Suspicious use of WriteProcessMemory
      PID:2880

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\yaobif.exe

    Filesize

    168KB

    MD5

    d063669d395897e2b095ca9ed27ef476

    SHA1

    b473b1e9a587e06c3087893a58466356dfe06ec8

    SHA256

    e3b88932139ec1b28bd3ee0fbdf7dfa949d9f087be562ce20d92c7743cad1165

    SHA512

    e9543a537f31f3b9a0aa4545b0c2ec6a08ed8b5c1aba187ec5291d356e928ddfecc08794cff6da8d7d15b91dc0d2c5f8b0448ee0e374918f6f25eff8f0f60487

  • memory/2548-0-0x0000000000400000-0x000000000042C000-memory.dmp

    Filesize

    176KB

  • memory/2548-37-0x0000000000400000-0x000000000042C000-memory.dmp

    Filesize

    176KB

  • memory/2880-33-0x0000000000400000-0x000000000042C000-memory.dmp

    Filesize

    176KB

  • memory/2880-38-0x0000000000400000-0x000000000042C000-memory.dmp

    Filesize

    176KB