Overview

overview

10

Static

static

3

2026-10-30...ck.exe

windows10-2004-x64

10

2026-10-30...ck.exe

windows11-ltsc_2024-x64

10

Resubmissions

01/11/2026, 05:59

261101-gp3zgabd5610

01/11/2026, 05:57

261101-gn38vas1ax10

01/11/2026, 05:55

261101-gmrtesav5q10

01/11/2026, 05:47

261101-ghdq1agx4110

01/11/2026, 05:36

261101-gaw8dagw8110

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General

  • Target
    2026-10-30_1afc2c1b80caf51f17a9a69013d59d1d_elex_virlock
  • Size 1.6MB
  • Sample261101-gp3zgabd56
  • SHA256 aec4842ad29a660f67064021e8ce6490785e38dda1a942122da77933ad149ba9
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
nabucurdefense_evasiondiscoveryexecutionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target
      2026-10-30_1afc2c1b80caf51f17a9a69013d59d1d_elex_virlock
    • Size 1.6MB
    • SHA256 aec4842ad29a660f67064021e8ce6490785e38dda1a942122da77933ad149ba9
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryexecutionnabucurpersistenceransomwarespywarestealertrojan

    • 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 (148) files with added filename extension

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

      ransomware

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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

    • Drops file in System32 directory

    • Executes a VBScript file via the Windows Script Host.

      execution
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2
T1059

Visual Basic

1
T1059.005

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

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks