Analysis

  • max time kernel
    154s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02/10/2022, 05:02

General

  • Target
    05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe
  • Size 211KB
  • Sample221002-fpclvaahdr
  • SHA256 05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • 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
  • Loads dropped DLL 3 IoCs
  • 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
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe
    "C:\Users\Admin\AppData\Local\Temp\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe"
    1⤵
    • Modifies system executable filetype association
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1996
    • C:\Users\Admin\AppData\Local\Temp\3582-490\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1496
      • C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
        "C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe" _?=C:\Users\Admin\AppData\Local\Temp\3582-490\
        3⤵
        • Executes dropped EXE
        PID:1296

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe
        • Size 171KB
        • SHA256 c2379eef7899cf6090f831bb05c1bb047b4569f27a0e0eb63ddba7479c21c27d
        • MD5 SHA1 SHA512 SSDEEP

        05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe
        • Size 171KB
        • SHA256 c2379eef7899cf6090f831bb05c1bb047b4569f27a0e0eb63ddba7479c21c27d
        • MD5 SHA1 SHA512 SSDEEP

        Au_.exe

        • Path C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
        • Size 171KB
        • SHA256 c2379eef7899cf6090f831bb05c1bb047b4569f27a0e0eb63ddba7479c21c27d
        • MD5 SHA1 SHA512 SSDEEP

        Au_.exe

        • Path C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
        • Size 171KB
        • SHA256 c2379eef7899cf6090f831bb05c1bb047b4569f27a0e0eb63ddba7479c21c27d
        • MD5 SHA1 SHA512 SSDEEP

        LOGTRA~1.EXE

        • Path \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
        • Size 252KB
        • SHA256 8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043
        • MD5 SHA1 SHA512 SSDEEP

        05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe

        • Path \Users\Admin\AppData\Local\Temp\3582-490\05b395c52a2e20fc6ed53d4e71290b6072b897261624a774e6edea099042417e.exe
        • Size 171KB
        • SHA256 c2379eef7899cf6090f831bb05c1bb047b4569f27a0e0eb63ddba7479c21c27d
        • MD5 SHA1 SHA512 SSDEEP

        Au_.exe

        • Path \Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
        • Size 171KB
        • SHA256 c2379eef7899cf6090f831bb05c1bb047b4569f27a0e0eb63ddba7479c21c27d
        • MD5 SHA1 SHA512 SSDEEP

        memory/1996-54-0x0000000076171000-0x0000000076173000-memory.dmp