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

  • 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 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

  • C:\$Recycle.Bin\S-1-5-21-293278959-2699126792-324916226-1000\desktop.ini
    MD5

    a526b9e7c716b3489d8cc062fbce4005

    SHA1

    2df502a944ff721241be20a9e449d2acd07e0312

    SHA256

    e1b9ce9b57957b1a0607a72a057d6b7a9b34ea60f3f8aa8f38a3af979bd23066

    SHA512

    d83d4c656c96c3d1809ad06ce78fa09a77781461c99109e4b81d1a186fc533a7e72d65a4cb7edf689eeccda8f687a13d3276f1111a1e72f7c3cd92a49bce0f88

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

    bf99f2f8d175b9aef55db401f3c49345

    SHA1

    9beef2a4448154f943fcba2b2330aaf8e383882a

    SHA256

    492820e53f7c019a6f3ee166179378064da00c7d65e162a2432edb97467a0198

    SHA512

    edc250dae97c251446f8d71acdc95da52d8dc4ff16c08c6d0e938903b86effaa4643796fa5763f3e934dfccf16312367e25da4a06944166aaa798068b6890b35

    Download Submit

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

    Filesize

    8KB

    Download

  • memory/1332-4-0x0000000000000000-mapping.dmp

    Download