Overview

overview

10

Static

static

10

svchost.exe

windows7-x64

10

svchost.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    125s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-12-2022 10:49

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General

  • Target

    svchost.exe

  • Size

    500KB

  • MD5

    4dc8cae2cfff6ac862aea48b014937bb

  • SHA1

    80486ca4caa5cb4ce42885dcd66d7a1b4a27d5ce

  • SHA256

    ab0774b4ac9eb7e50c82abad03293ae39b668e81712b6ceb0d35ffe7e330881b

  • SHA512

    79eb56d858b21743ca565d22bb56cd3d8e4ecfdf462f03124672dca090c95ca51f8908f8dea22c3631dddba0a1a2bf443f41fdf8bf70e826335bcc56d0def47d

  • SSDEEP

    12288:YLrjOlAQS+OeO+OeNhBBhhBBYIeVZkD097u8HvaEs1Mm7Q:YLrjSGtVGD05u4yVMm

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 14 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • 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.

    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\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
    1⤵
    • Modifies extensions of user files
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2436
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
        PID:3492

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Query Registry

    2
    T1012

    System Information Discovery

    2
    T1082

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Data Encrypted for Impact

    1
    T1486

    Replay Monitor

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    Downloads

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

      225B

      MD5

      28818933fcf3ede3b45e0f5f36cf9629

      SHA1

      c522061c91847b9c32ef744f04ee9526bfbb694f

      SHA256

      7c3550b6fbf86eb37a37a5c79e66b9984a7ee1f74f6b16dddf8b53163f17e008

      SHA512

      3cbbc70359bf5d94524ae12db7213cac96f9bb745cc7dfec35b5d3b1d99365867862d9da7a4118d46fad2a920e5d956f76a767b06f10c92bd8a1a43cfa57ea04

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    • memory/3492-132-0x0000000000000000-mapping.dmp
      Download