Overview

overview

10

Static

static

051fb65440...d6.exe

windows7_x64

10

051fb65440...d6.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    91s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • 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 24 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\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:1864
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:864

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/864-3-0x0000000000000000-mapping.dmp
    Download
  • memory/1864-2-0x00000000760B1000-0x00000000760B3000-memory.dmp
    Filesize

    8KB

    Download