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Analysis

  • max time kernel
    145s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/10/2023, 19:47

General

  • Target

    NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe

  • Size

    58KB

  • MD5

    b9d3a4cc85f9a26015fe4479d0812e49

  • SHA1

    d34eb58d54d120c7243c882d54baa96e75e2b06a

  • SHA256

    b4ef2c05e5bda32c7ac5d7e2a6f2bcb9df4727c7dd44f8e86ee0e32f2a54a05f

  • SHA512

    cfd4630d71900487358df8d3f938cca5138db90a3dac1b02e4868e81308942b23dafd3d7826cccacbca836a45dd740534fd959087eb2f5367d59c559ba5d6f3d

  • SSDEEP

    768:MDcpEBMLfQcubV5wGE96YyXDTLdNSSS583:MDcfLfIbtEbyXfZb

Score
8/10

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

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

  • 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\NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4400
    • C:\Windows\SysWOW64\attrib.exe
      attrib +a +s +h +r C:\Windows\Debug\riyhost.exe
      2⤵
      • Sets file to hidden
      • Drops file in Windows directory
      • Views/modifies file attributes
      PID:3060
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\NEASB9~1.EXE > nul
      2⤵
        PID:4168
    • C:\Windows\Debug\riyhost.exe
      C:\Windows\Debug\riyhost.exe
      1⤵
      • Executes dropped EXE
      PID:4040

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\Debug\riyhost.exe

      Filesize

      58KB

      MD5

      d94f17009f3041774d1e9371e021916a

      SHA1

      23d0323948a3e52dc73a420bbde82ed1ba81ffba

      SHA256

      dde5d5e13526efc4cec62257822844b89f0f4d728d4633059734112bacd3d784

      SHA512

      a48f2c24907d494114f7b3a26c30c83a90740dab95b7b953f97173f6d49ea559d6d671639c7ffaf369384ae2eb49095aa3a632493720004ee8e6c9dd60ae1d23

    • C:\Windows\debug\riyhost.exe

      Filesize

      58KB

      MD5

      d94f17009f3041774d1e9371e021916a

      SHA1

      23d0323948a3e52dc73a420bbde82ed1ba81ffba

      SHA256

      dde5d5e13526efc4cec62257822844b89f0f4d728d4633059734112bacd3d784

      SHA512

      a48f2c24907d494114f7b3a26c30c83a90740dab95b7b953f97173f6d49ea559d6d671639c7ffaf369384ae2eb49095aa3a632493720004ee8e6c9dd60ae1d23