Overview

overview

10

Static

static

5

YellowSkull 2.0.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    YellowSkull 2.0.exe
  • Size 2.5MB
  • Sample260805-qabfcayamc
  • SHA256 1811c7b5ddcc6637a782bf32db70b60bd0bf3ec2b3498716591f718cda25fd14
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoveryexecutionpersistenceransomwaretrojanupx

Malware Config

Targets

    • Target
      YellowSkull 2.0.exe
    • Size 2.5MB
    • SHA256 1811c7b5ddcc6637a782bf32db70b60bd0bf3ec2b3498716591f718cda25fd14
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryexecutionpersistenceransomwaretrojanupx

    • UAC bypass

      defense_evasiontrojan

    • Disables Task Manager via registry modification

      defense_evasion

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Executes a VBScript file via the Windows Script Host.

      execution

    • Sets desktop wallpaper using registry

      ransomware

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx
    behavioral1

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

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

4
T1112

Credential Access

Discovery

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1
T1491

Tasks