Analysis

  • max time kernel
    141s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-07-2022 13:40

General

  • Target

    67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe

  • Size

    89KB

  • MD5

    0d262efe27077863e91a7c90f550d91d

  • SHA1

    1a3d8fb0126f6df9a432949a218dc5014ef7135f

  • SHA256

    67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df

  • SHA512

    820677dc1075ca7d17a393d1cd9df12935c2633124a1c26540fd2707c053c64141cd6a47ea18f14663efdec7e4e1260709c12811b4db56ba89432fe5e4c12da1

Malware Config

Signatures

  • Detect Neshta payload 2 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe
    "C:\Users\Admin\AppData\Local\Temp\67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe"
    1⤵
    • Modifies system executable filetype association
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3836
    • C:\Users\Admin\AppData\Local\Temp\3582-490\67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe"
      2⤵
      • Executes dropped EXE
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:4880
      • \??\c:\programdata\1be588a5b7\gdsun.exe
        c:\programdata\1be588a5b7\gdsun.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:804
        • C:\Windows\SysWOW64\REG.exe
          REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" /f /v Startup /t REG_SZ /d C:\ProgramData\1be588a5b7
          4⤵
            PID:1040

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\ProgramData\0
      MD5

      d41d8cd98f00b204e9800998ecf8427e

      SHA1

      da39a3ee5e6b4b0d3255bfef95601890afd80709

      SHA256

      e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

      SHA512

      cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

    • C:\ProgramData\1be588a5b7\gdsun.exe
      Filesize

      49KB

      MD5

      82299831a18cbbf8cf2a9cb8aa8b0aaf

      SHA1

      661127923af05bae029e15b9813fccaa359c33e3

      SHA256

      909a18fdec9d4d1883f6de3a20cba1a6cbd5a638dee8e71b754d5ca738001c27

      SHA512

      b56e25048106c8ba0b49bdc7a38761018f07be2ec07b026763255c7488d10d6533c680c590288df5c69eb1fdbfb377303909bcf28a3c62ec0e635240893753b0

    • C:\Users\Admin\AppData\Local\Temp\3582-490\67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe
      Filesize

      49KB

      MD5

      82299831a18cbbf8cf2a9cb8aa8b0aaf

      SHA1

      661127923af05bae029e15b9813fccaa359c33e3

      SHA256

      909a18fdec9d4d1883f6de3a20cba1a6cbd5a638dee8e71b754d5ca738001c27

      SHA512

      b56e25048106c8ba0b49bdc7a38761018f07be2ec07b026763255c7488d10d6533c680c590288df5c69eb1fdbfb377303909bcf28a3c62ec0e635240893753b0

    • C:\Users\Admin\AppData\Local\Temp\3582-490\67b88b86924ccae2358f37b125b6996c39f389bf90714436f19af3c9017bc0df.exe
      Filesize

      49KB

      MD5

      82299831a18cbbf8cf2a9cb8aa8b0aaf

      SHA1

      661127923af05bae029e15b9813fccaa359c33e3

      SHA256

      909a18fdec9d4d1883f6de3a20cba1a6cbd5a638dee8e71b754d5ca738001c27

      SHA512

      b56e25048106c8ba0b49bdc7a38761018f07be2ec07b026763255c7488d10d6533c680c590288df5c69eb1fdbfb377303909bcf28a3c62ec0e635240893753b0

    • \??\c:\programdata\1be588a5b7\gdsun.exe
      Filesize

      49KB

      MD5

      82299831a18cbbf8cf2a9cb8aa8b0aaf

      SHA1

      661127923af05bae029e15b9813fccaa359c33e3

      SHA256

      909a18fdec9d4d1883f6de3a20cba1a6cbd5a638dee8e71b754d5ca738001c27

      SHA512

      b56e25048106c8ba0b49bdc7a38761018f07be2ec07b026763255c7488d10d6533c680c590288df5c69eb1fdbfb377303909bcf28a3c62ec0e635240893753b0

    • memory/804-134-0x0000000000000000-mapping.dmp
    • memory/1040-138-0x0000000000000000-mapping.dmp
    • memory/3836-130-0x0000000000400000-0x000000000041B000-memory.dmp
      Filesize

      108KB

    • memory/3836-139-0x0000000000400000-0x000000000041B000-memory.dmp
      Filesize

      108KB

    • memory/4880-131-0x0000000000000000-mapping.dmp