Overview

overview

10

Static

static

3

2026-07-31...ck.exe

windows10-2004-x64

10

2026-07-31...ck.exe

windows11-ltsc_2024-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target
    2026-07-31_3bce957bb92701dbea6567f8273ed182_elex_virlock
  • Size 157KB
  • Sample260801-abcf2atcla
  • SHA256 c96a5ec43a96cfdcac6f16288390154eebf442f4b4b2e0e27324be9c104a26d8
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
nabucurdefense_evasiondiscoveryexecutionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target
      2026-07-31_3bce957bb92701dbea6567f8273ed182_elex_virlock
    • Size 157KB
    • SHA256 c96a5ec43a96cfdcac6f16288390154eebf442f4b4b2e0e27324be9c104a26d8
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryexecutionpersistencetrojannabucurransomwarespywarestealer

    • Family: Nabucur

      Nabucur is a ransomware first seen in 2015.

      ransomwarenabucur

    • Modifies visibility of file extensions in Explorer

      defense_evasion

    • UAC bypass

      defense_evasiontrojan

    • Renames multiple (78) files with added filename extension

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

      ransomware

    • Executes dropped EXE

    • 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
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

4
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

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks