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Analysis

  • max time kernel
    143s
  • max time network
    129s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-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.

  • Deletes itself 1 IoCs
  • 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 8 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⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1288
    • C:\Windows\SysWOW64\attrib.exe
      attrib +a +s +h +r C:\Windows\Debug\zskhost.exe
      2⤵
      • Sets file to hidden
      • Drops file in Windows directory
      • Views/modifies file attributes
      PID:1588
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\NEASB9~1.EXE > nul
      2⤵
      • Deletes itself
      PID:2724
  • C:\Windows\Debug\zskhost.exe
    C:\Windows\Debug\zskhost.exe
    1⤵
    • Executes dropped EXE
    PID:1692

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\Debug\zskhost.exe

    Filesize

    58KB

    MD5

    02f841027c93a73547b65e7303a8c171

    SHA1

    9b66cdea4fdb096aa980e4290ca5bb295fb73f92

    SHA256

    449ce2e8e8cc379e50ac07e1f0e8a18b531328dc4902e8023a8bb489bd6852ed

    SHA512

    6ca6aad100605b5c6880102d0ba36a2adaf2763fe467188220289ca27632c6286a3db5f229499fb017950cebb4d8d7102c0246f16b3012833a158aed4bbca367

  • C:\Windows\debug\zskhost.exe

    Filesize

    58KB

    MD5

    02f841027c93a73547b65e7303a8c171

    SHA1

    9b66cdea4fdb096aa980e4290ca5bb295fb73f92

    SHA256

    449ce2e8e8cc379e50ac07e1f0e8a18b531328dc4902e8023a8bb489bd6852ed

    SHA512

    6ca6aad100605b5c6880102d0ba36a2adaf2763fe467188220289ca27632c6286a3db5f229499fb017950cebb4d8d7102c0246f16b3012833a158aed4bbca367