Overview

overview

10

Static

static

3

a568037d8a...7f.exe

windows11-21h2-x64

10

Resubmissions

27/08/2026, 10:11

260827-l71dhssgjg

27/08/2026, 10:06

260827-l448assfqa10

27/08/2026, 09:53

260827-lw1j5ssfjc10

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General

  • Target
    a568037d8ab341f3049755bdaa2b099cc4a2aded8ecad00bcd5af96de8b2d07f
  • Size 4.0MB
  • Sample260827-l448assfqa
  • SHA256 a568037d8ab341f3049755bdaa2b099cc4a2aded8ecad00bcd5af96de8b2d07f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
nabucurdefense_evasiondiscoveryexecutionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target
      a568037d8ab341f3049755bdaa2b099cc4a2aded8ecad00bcd5af96de8b2d07f
    • Size 4.0MB
    • SHA256 a568037d8ab341f3049755bdaa2b099cc4a2aded8ecad00bcd5af96de8b2d07f
    • 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 (177) files with added filename extension

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

      ransomware

    • Disables service(s)

      defense_evasionexecution

    • 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

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

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

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

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

2
T1562

Disable or Modify Tools

2
T1562.001

Modify Registry

5
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

Web Service

1
T1102

Exfiltration

Impact

Service Stop

1
T1489

Tasks