Overview

overview

10

Static

static

6f4338a7a3...99.exe

windows7_x64

10

6f4338a7a3...99.exe

windows10_x64

10

Analysis

  • max time kernel
    32s
  • max time network
    115s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08-04-2021 05:05

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General

  • Target

    6f4338a7a3ef8e491279ae81543a08554cad15d1bce6007047bc4449d945b799.exe

  • Size

    500KB

  • MD5

    35ac0fcbe2b73a541366f2ef83e801cf

  • SHA1

    a80b1f9f44156bc876b9f1e641745af1a5a77be2

  • SHA256

    6f4338a7a3ef8e491279ae81543a08554cad15d1bce6007047bc4449d945b799

  • SHA512

    8a6e9fe27d5235fdcc1ce8429b891c93330d2dde0687cc7fdd590622314bebf56b3948f169bf913cf0786ab8d30439e1ba4b4ca01739a636c1f7e04df92a05f9

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
  • 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\6f4338a7a3ef8e491279ae81543a08554cad15d1bce6007047bc4449d945b799.exe
    "C:\Users\Admin\AppData\Local\Temp\6f4338a7a3ef8e491279ae81543a08554cad15d1bce6007047bc4449d945b799.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:4092
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
        PID:3372

    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

    1
    T1012

    System Information Discovery

    1
    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
      MD5

      589152556c60550f99f21262a4e27104

      SHA1

      9cd9c48b41c2310de84516bcc31a4d54d140405a

      SHA256

      334e3caba33749c9a7b9937e5c7c874fd497063987c5b178ece54826b610a4d2

      SHA512

      e88dc327608d9e2066289bfe3dc540cb5a3503f9fd36059ac992431be647cfad4430bd386efbb83e90754a833dcee6a483e497546a5becc1cc8f7c87e472c67a

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    • memory/3372-2-0x0000000000000000-mapping.dmp
      Download