Overview

overview

10

Static

static

10

4770a0447e...99.exe

windows7_x64

10

4770a0447e...99.exe

windows10_x64

10

Analysis

  • max time kernel
    60s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    08/04/2021, 04:26

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General

  • Target
    4770a0447ebc83a36e590da8d01ff4a418d58221c1f44d21f433aaf18fad5a99.exe
  • Size 504KB
  • Sample210408-m4swb7bm4e
  • SHA256 4770a0447ebc83a36e590da8d01ff4a418d58221c1f44d21f433aaf18fad5a99
  • MD5 SHA1 SHA512
Score
10/10
mespinozaransomwarespywarestealer

Malware Config

Signatures

  • Mespinoza Ransomware 2 TTPs

    Also known as Pysa. Ransomware-as-a-servoce which first appeared in 2020.

    ransomwaremespinoza
  • Modifies extensions of user files 18 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • 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.

  • Suspicious use of WriteProcessMemory 7 IoCs
  • System policy modification 1 TTPs 2 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\4770a0447ebc83a36e590da8d01ff4a418d58221c1f44d21f433aaf18fad5a99.exe
    "C:\Users\Admin\AppData\Local\Temp\4770a0447ebc83a36e590da8d01ff4a418d58221c1f44d21f433aaf18fad5a99.exe"
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1040
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1332

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1040-2-0x0000000076311000-0x0000000076313000-memory.dmp
        Download