Overview

overview

10

Static

static

051fb65440...d6.exe

windows7_x64

10

051fb65440...d6.exe

windows10_x64

10

Analysis

  • max time kernel
    41s
  • max time network
    115s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08-04-2021 05:06

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General

  • Target

    051fb654403340420102430f807ea41ab790666488d897dc5b0008e99fed47d6.exe

  • Size

    500KB

  • MD5

    768ba1196f9534928ad2f8ffa12bd7f7

  • SHA1

    b435fedf7e40e3ef24dba050102d63e2d5aa2e1e

  • SHA256

    051fb654403340420102430f807ea41ab790666488d897dc5b0008e99fed47d6

  • SHA512

    17c8fcf034b6e9d41aace6486eaa1d550e77b305ca0c72804d9825d0bebccb1b2f639324bc5f0c75b565e26494edefa4219dc8f17db0162dbf402b9d5a6382a7

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\051fb654403340420102430f807ea41ab790666488d897dc5b0008e99fed47d6.exe
    "C:\Users\Admin\AppData\Local\Temp\051fb654403340420102430f807ea41ab790666488d897dc5b0008e99fed47d6.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:744
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
        PID:4080

    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

      eeb6ef1b9ac438f40e400b22ee7bd0e1

      SHA1

      207cc8e35a7ad3edae9d8648737c1945fa08deab

      SHA256

      83b3681140956baae979cb4a612081d6748922ad92b5c8f43833508dcdd1e10c

      SHA512

      7479906b31c3066c3e5c51648ada57e1b5510160fcb8acabd8b1a4e37df5e03304ea4d628ac1a991290ca1fadaa7f17a5792adaeca350775cf18c5eeeefe91ba

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    • memory/4080-2-0x0000000000000000-mapping.dmp
      Download