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Analysis

  • max time kernel
    141s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231025-en
  • resource tags

    arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
  • submitted
    31/10/2023, 22:08

General

  • Target

    NEAS.5a6f2bef8250643387465d7b88a73d00_JC.exe

  • Size

    58KB

  • MD5

    5a6f2bef8250643387465d7b88a73d00

  • SHA1

    36c16e4a6e1234c65a675a2c20a1542e1e759658

  • SHA256

    52c6f26d5b3c4221b662d94ccabf1074de5673f4d114ea195b7bd1b697b8c806

  • SHA512

    74d9bb86f5f46ece7ae9197fefd4ab2858e3b685d00984df8e4c4dcdb30c2c7211476a23ffdb9f7f07dc4eb00fad67043529a5ea7e5fc142da666bd5baaef9a2

  • SSDEEP

    384:+5rDuuOFpEauMLfQDb2pproT/z4m5m1GJE6Al6z8yXDTLhrwnT:MDcpEBMLfQcubV5wGE96YyXDTLdoT

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.5a6f2bef8250643387465d7b88a73d00_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.5a6f2bef8250643387465d7b88a73d00_JC.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2164
    • 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:2968
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\NEAS5A~1.EXE > nul
      2⤵
      • Deletes itself
      PID:2660
  • C:\Windows\Debug\zskhost.exe
    C:\Windows\Debug\zskhost.exe
    1⤵
    • Executes dropped EXE
    PID:2352

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\Debug\zskhost.exe

    Filesize

    58KB

    MD5

    a732b3f8576e022e4dd9e12c239c6c80

    SHA1

    070c147e90ab6885940521c5596e99d4b14ace6f

    SHA256

    423e8c9ce3d92052bcb2dc3e795dc38cf8e36915c5ce0bb134c39f94ea6d4102

    SHA512

    aff24c8b4dabae7a91c0677bb0b89d05f334aaa87c9c267833eb20eb25d3a0cbb3c81511b47d880fec4dab40e5464831e1e12ae6d5ce5eafe944c5e9597b31d1

  • C:\Windows\debug\zskhost.exe

    Filesize

    58KB

    MD5

    a732b3f8576e022e4dd9e12c239c6c80

    SHA1

    070c147e90ab6885940521c5596e99d4b14ace6f

    SHA256

    423e8c9ce3d92052bcb2dc3e795dc38cf8e36915c5ce0bb134c39f94ea6d4102

    SHA512

    aff24c8b4dabae7a91c0677bb0b89d05f334aaa87c9c267833eb20eb25d3a0cbb3c81511b47d880fec4dab40e5464831e1e12ae6d5ce5eafe944c5e9597b31d1