Overview

overview

10

Static

static

10

4770a0447e...99.exe

windows7_x64

10

4770a0447e...99.exe

windows10_x64

10

Analysis

  • max time kernel
    47s
  • max time network
    66s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08-04-2021 04:26

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General

  • Target

    4770a0447ebc83a36e590da8d01ff4a418d58221c1f44d21f433aaf18fad5a99.exe

  • Size

    504KB

  • MD5

    e3da64fd9a0a585ebe00ac7f235104d6

  • SHA1

    52b2fc13ec0dbf8a0250c066cd3486b635a27827

  • SHA256

    4770a0447ebc83a36e590da8d01ff4a418d58221c1f44d21f433aaf18fad5a99

  • SHA512

    1620d261d7c176fcb9f93a8b178af55698b7faeb4baa8d3ca3531d211c58eb6ccbf36e57263095f254d3f5567b1b51865dcea48302e6ecfd9d56c6cff3ab98f8

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 16 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • 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 3 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:1144
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
        PID:684

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-3341490333-719741536-2920803124-1000\desktop.ini
      MD5

      54fc812a6acc37f554f18b925f0a3c76

      SHA1

      ec32bd50f94749a7d5aef2e8dd2b9a803824141d

      SHA256

      13f93021c2cd44b04518b2dbfd7e7d88950a59934b72aafadcfdc9f32cf1fb7c

      SHA512

      e7b2128500f6db9f8532734e83669d26498c905218457a709cf95ce9c1abf4a3ad0551a053b094e1c8dd31c96400a485c214e1f6a16299cdff325ac09f1aeff6

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    • C:\Users\Admin\AppData\Local\Temp\update.bat
      MD5

      bf99f2f8d175b9aef55db401f3c49345

      SHA1

      9beef2a4448154f943fcba2b2330aaf8e383882a

      SHA256

      492820e53f7c019a6f3ee166179378064da00c7d65e162a2432edb97467a0198

      SHA512

      edc250dae97c251446f8d71acdc95da52d8dc4ff16c08c6d0e938903b86effaa4643796fa5763f3e934dfccf16312367e25da4a06944166aaa798068b6890b35

      Download Submit

    • memory/684-3-0x0000000000000000-mapping.dmp

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