Analysis

  • max time kernel
    111s
  • max time network
    106s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/10/2024, 04:29

General

  • Target

    f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe

  • Size

    15KB

  • MD5

    f662c9c1cdf777db6a73dd0c2eef4b40

  • SHA1

    61bad3b005cc136d514cd3ec5ae86428142bc1ad

  • SHA256

    f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58

  • SHA512

    d1d9e0b046f04a0c8cb02e3402866440a3373c9bdc431fdde01dfd552735a9dbbac96dcc16af0e4d9a2d07a4a78f29526e5fc25a4e03c74be808dc3a6b4bb944

  • SSDEEP

    384:IO3qdXlIQV0YXd45xuYiMcRWnPbeVGWLwbbb9:IO3EVdV0YXd4DuicNV3C

Malware Config

Signatures

  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe
    "C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3428
    • C:\Windows\SysWOW64\attrib.exe
      attrib +a +s +h +r C:\Windows\Debug\mewhost.exe
      2⤵
      • Sets file to hidden
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Views/modifies file attributes
      PID:2372
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\F9AEFB~1.EXE > nul
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2780
  • C:\Windows\Debug\mewhost.exe
    C:\Windows\Debug\mewhost.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4760

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Windows\debug\mewhost.exe

          Filesize

          15KB

          MD5

          fbfbeeae81c4dc2c2ef89aa2421da792

          SHA1

          9face13a81941a1f5129db9c710e26bfc3cfddff

          SHA256

          b714a337fcaa499133f82b0dcb1a2767caf5e739f0bdff04dc73d6cfe556265b

          SHA512

          f765a86efd42669e794157c1ded6658fa1f27c5e9220b22b883bffd01ecd1939a720d7244f6ff9ef6b2cc2b139348a8738ff7d7f4b56dc40e3260288a8bfe096

        • memory/3428-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3428-5-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4760-6-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4760-9-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4760-12-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4760-15-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB