Overview

overview

10

Static

static

10

af99b482eb...c8.exe

windows7_x64

10

af99b482eb...c8.exe

windows10_x64

10

Analysis

  • max time kernel
    71s
  • max time network
    110s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08-04-2021 05:06

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General

  • Target

    af99b482eb0b3ff976fa719bf0079da15f62a6c203911655ed93e52ae05c4ac8.exe

  • Size

    500KB

  • MD5

    d751f54365181f544f908cc9ae3c91c5

  • SHA1

    51cbc9455b7781cf0529f299631e59016fe52e95

  • SHA256

    af99b482eb0b3ff976fa719bf0079da15f62a6c203911655ed93e52ae05c4ac8

  • SHA512

    04497dcac535c18247b13634db35a3a53369719696e700ff2c45637c616f6932ba22ddad2e3925055c92e5922f38c34f09ce8d87106f894a7a586ad0d41e6d33

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 8 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • 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\af99b482eb0b3ff976fa719bf0079da15f62a6c203911655ed93e52ae05c4ac8.exe
    "C:\Users\Admin\AppData\Local\Temp\af99b482eb0b3ff976fa719bf0079da15f62a6c203911655ed93e52ae05c4ac8.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:528
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
        PID:2252

    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

      2f88c475db8b20969e9234d1faf5f06f

      SHA1

      efc05a057ad80c482cb9600d70beda9c1d857289

      SHA256

      f0002a081ad6ca7e6b932bb63f2089d9ddf7191892590572022f34cdde7ea108

      SHA512

      bfa529272b3c55194dd4bd8ec54089faa0162abd7745d359cbc6729061d37aaab405742b50e9ec2d48a3aaffbb9de8436ed23f2e303e568ca26cc8d57229c172

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    • memory/2252-2-0x0000000000000000-mapping.dmp
      Download