Overview

overview

10

Static

static

7fd3000a3a...c3.exe

windows7_x64

10

7fd3000a3a...c3.exe

windows10_x64

10

Analysis

  • max time kernel
    52s
  • max time network
    39s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    08-04-2021 05:06

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General

  • Target

    7fd3000a3afbf077589c300f90b59864ec1fb716feba8e288ed87291c8fdf7c3.exe

  • Size

    500KB

  • MD5

    f812e7d373c3bf1f449560b88cfbb6bb

  • SHA1

    f7d7567d1721478eee276001aeeba44473a713ef

  • SHA256

    7fd3000a3afbf077589c300f90b59864ec1fb716feba8e288ed87291c8fdf7c3

  • SHA512

    31abccfb4e6491999943c4710c6c77b8d8fb2b1b3947b11f7867a8e778c8f70b0515cf13b9daca034088367d6616b4d3be7343f1526cd066cb530daa9d18154f

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
  • 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\7fd3000a3afbf077589c300f90b59864ec1fb716feba8e288ed87291c8fdf7c3.exe
    "C:\Users\Admin\AppData\Local\Temp\7fd3000a3afbf077589c300f90b59864ec1fb716feba8e288ed87291c8fdf7c3.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:1856
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1096

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

    683791746e500ac80ca5bc146ecbef9f

    SHA1

    0ee93cd9766d6b0b6425a9d94aeb0088ac863098

    SHA256

    6fee48de976ddf0617c5d54449c238f161d7fc9217596ad0da97a759cdca9edf

    SHA512

    a0867bd0893618485fc772e440f2ec0c39de95351913b2769ea17f33d108edbfa7ff5cac958d3960f9b322d5c90b6a5e950865a34eac51e1930a46c55192d2bd

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  • memory/1096-3-0x0000000000000000-mapping.dmp
    Download
  • memory/1856-2-0x00000000767E1000-0x00000000767E3000-memory.dmp
    Filesize

    8KB

    Download