Overview

overview

10

Static

static

10

4dc802894c...9b.exe

windows7_x64

10

4dc802894c...9b.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    134s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    06-03-2022 05:00

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General

  • Target

    4dc802894c45ec4d119d002a7569be6c99a9bba732d0057364da9350f9d3659b.exe

  • Size

    500KB

  • MD5

    83e1ca89bcd55a87f826bc6901ff7f3e

  • SHA1

    d0db4d232331234f0c430008a4320c0dea993c20

  • SHA256

    4dc802894c45ec4d119d002a7569be6c99a9bba732d0057364da9350f9d3659b

  • SHA512

    9d76d71119fa3256eb25fda06c54f1a51d547177156847ae140176868eb0d7ad41619e6bcb6dd24b523ef58cb3d5e3619172fc6868e1290fc3e956a6e136e6bc

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 4 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\4dc802894c45ec4d119d002a7569be6c99a9bba732d0057364da9350f9d3659b.exe
    "C:\Users\Admin\AppData\Local\Temp\4dc802894c45ec4d119d002a7569be6c99a9bba732d0057364da9350f9d3659b.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:1556
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
        PID:180

    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
      MD5

      b0ed554f716831162ded778822cc4844

      SHA1

      1c906fe0d9bb6cf21ad3b3dd07ee188d0dca3e68

      SHA256

      a543c54dcc9f7f2ff7a3091ddae9e7da692ab95280304ecec4383f2fc1a92d95

      SHA512

      81dc5c4c8c8b8e07e52b0522755050441aa30c49d57a3656342c281cabbc73dece94034948234c90060a5a726e828655c3eb210b739bb97dac2182827d705366

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