Overview

overview

10

Static

static

3

uwcryptoRR.exe

windows10-2004-x64

10

uwcryptoRR.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    uwcryptoRR.exe
  • Size 31.5MB
  • Sample261014-vs799aywcy
  • SHA256 eff78cd51cd506d1aaeb9ed79f1e0f2259d00c6dc35dcdda7863707aa4328d47
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
bootkitdefense_evasionexecutionpersistencepyinstallerransomware

Malware Config

Targets

    • Target
      uwcryptoRR.exe
    • Size 31.5MB
    • SHA256 eff78cd51cd506d1aaeb9ed79f1e0f2259d00c6dc35dcdda7863707aa4328d47
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    bootkitdefense_evasionexecutionpersistenceransomware

    • Modifies WinLogon for persistence

      persistence

    • Renames multiple (111) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Disables RegEdit via registry modification

      defense_evasion

    • Disables Task Manager via registry modification

      defense_evasion

    • Event Triggered Execution: Image File Execution Options Injection

      persistence

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Drops desktop.ini file(s)

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence
    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

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Event Triggered Execution

1
T1546

Image File Execution Options Injection

1
T1546.012

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Event Triggered Execution

1
T1546

Image File Execution Options Injection

1
T1546.012

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

2
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

2
T1012

System Information Discovery

1
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks