Overview

overview

10

Static

static

10

af99b482eb...c8.exe

windows7_x64

10

af99b482eb...c8.exe

windows10_x64

10

Analysis

  • max time kernel
    41s
  • max time network
    40s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • 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 16 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\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:1108
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:556

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/556-3-0x0000000000000000-mapping.dmp
    Download
  • memory/1108-2-0x00000000760D1000-0x00000000760D3000-memory.dmp
    Filesize

    8KB

    Download