Overview

overview

10

Static

static

3

WindowsUpdate.exe

windows10-2004-x64

10

WindowsUpdate.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    WindowsUpdate.exe
  • Size 8.1MB
  • Sample260802-p67mzstbmc
  • SHA256 526edd03dafc3e7750292fe5a2b10a173f48da7d7559a3a3ff31a78b430f7aab
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoveryevasionexecutionimpactpersistenceprivilege_escalationpyinstallerransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\YOUR_FILES_ARE_ENCRYPTED.txt

Ransom Note
  • ╔═══════════════════════════════════════════╗ ║ YOUR SYSTEM IS FUCKED ║ ╠═══════════════════════════════════════════╣ ║ ALL YOUR FILES HAVE BEEN ENCRYPTED ║ ║ WITH MILITARY-GRADE ENCRYPTION ║ ║ ║ ║ PAY: 2.5 BITCOIN ║ ║ TO: 1FAKECRYFUCKYOU123456789 ║ ║ ║ ║ EMAIL YOUR COMPUTER ID TO: ║ ║ [email protected] ║ ║ ║ ║ COMPUTER ID: 335ba3ec60e48778 ║ ║ ║ ║ TIME REMAINING: 72 HOURS ║ ║ AFTER DEADLINE: FILES PERMANENTLY DELETED ║ ║ ║ ║ WE HAVE: ║ ║ • ENCRYPTED YOUR FILES ║ ║ • DELETED YOUR BACKUPS ║ ║ • LOCKED YOUR SCREEN ║ ║ • SPREAD TO YOUR NETWORK ║ ║ • STOLEN YOUR BROWSER DATA ║ ║ • DISABLED YOUR ANTIVIRUS ║ ║ ║ ║ PAY TO GET: ║ ║ • DECRYPTION TOOL ║ ║ • DATA DELETION PROOF ║ ║ • NO PUBLIC LEAK ║ ╚═══════════════════════════════════════════╝

Targets

    • Target
      WindowsUpdate.exe
    • Size 8.1MB
    • SHA256 526edd03dafc3e7750292fe5a2b10a173f48da7d7559a3a3ff31a78b430f7aab
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryevasionexecutionimpactpersistenceprivilege_escalationpyinstallerransomwarespywarestealer

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

      persistenceprivilege_escalation

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Adds Run key to start application

      persistence

    • Drops desktop.ini file(s)

    • Network Share Discovery

      Attempt to gather information on host network.

      discovery

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Windows Management Instrumentation

1
T1047

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Direct Volume Access

1
T1006

Indicator Removal

2
T1070

File Deletion

2
T1070.004

Modify Registry

1
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Network Share Discovery

1
T1135

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

1
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Inhibit System Recovery

3
T1490

Tasks