Overview

overview

10

Static

static

6f4338a7a3...99.exe

windows7_x64

10

6f4338a7a3...99.exe

windows10_x64

10

Analysis

  • max time kernel
    48s
  • max time network
    8s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • 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 6 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\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:384
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1260

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/384-2-0x0000000076241000-0x0000000076243000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1260-3-0x0000000000000000-mapping.dmp
    Download