Overview

overview

10

Static

static

10

931772ac59...43.exe

windows7_x64

10

931772ac59...43.exe

windows10_x64

10

Analysis

  • max time kernel
    51s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    08-04-2021 05:06

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General

  • Target

    931772ac59f5859e053589202c8db81edc01911391fe5b32c9abb5bbc2b06e43.exe

  • Size

    500KB

  • MD5

    3f558a6a53c72b726b42d21fa1faaf83

  • SHA1

    6f5f822260e4deaa859f3f17e81d9349950d9e34

  • SHA256

    931772ac59f5859e053589202c8db81edc01911391fe5b32c9abb5bbc2b06e43

  • SHA512

    932442ae873bdd196142d9fc023d8c7ca05eeb55f728aa78dd451aaae5e35c13e701a3ca17bd8d79b8f924901677668275d325e7182d40f71e9b931a7ad568cd

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\931772ac59f5859e053589202c8db81edc01911391fe5b32c9abb5bbc2b06e43.exe
    "C:\Users\Admin\AppData\Local\Temp\931772ac59f5859e053589202c8db81edc01911391fe5b32c9abb5bbc2b06e43.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:324
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1728

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

    79c47726d14e13408e08f173d4d2c69e

    SHA1

    51ae7eb08aba4b0c60ff5f22a067ae14531fb93e

    SHA256

    a2e5cd6212a4b765358dc1be8bf573aca36991541df25efa10a2b8d7041bd08b

    SHA512

    ecc8913879ee0b50061a621af62c1327814c64cb2f69e04d3a9a32ed0c384741d091787618d370c3430f9e5a56b11a4b424d4f1a23175fa024b6171469281d4e

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  • memory/324-2-0x00000000766C1000-0x00000000766C3000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1728-3-0x0000000000000000-mapping.dmp
    Download