Overview

overview

8

Static

static

1

CalendlySetup.vbs

windows10-2004-x64

8

CalendlySetup.vbs

windows11-ltsc_2024-x64

8

Sharing

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General

  • Target
    CalendlySetup.vbs
  • Size 4.9MB
  • Sample260728-bl91qavgnc
  • SHA256 8bd895000f7e43962381a1d4746bcaa4a6ea6c7845c103e56694f1d6780be2a2
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
defense_evasiondiscoveryexecutionpersistenceprivilege_escalationrevoked_codesign

Malware Config

Targets

    • Target
      CalendlySetup.vbs
    • Size 4.9MB
    • SHA256 8bd895000f7e43962381a1d4746bcaa4a6ea6c7845c103e56694f1d6780be2a2
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    8/10
    defense_evasiondiscoveryexecutionpersistenceprivilege_escalationrevoked_codesign

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

      persistence

    • Signed with revoked ConnectWise certificate

      Binary is signed using a ConnectWise certificate revoked for key compromise.

      revoked_codesign

    • Checks computer location settings

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

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

      persistenceprivilege_escalation

    • Executes dropped EXE

    • Loads dropped DLL

    • Deobfuscate/Decode Files or Information

      Payload decoded via CertUtil.

      defense_evasion

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Boot or Logon Autostart Execution: Authentication Package

      Suspicious Windows Authentication Registry Modification.

      persistenceprivilege_escalation

    • 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

1
T1059

Visual Basic

1
T1059.005

Persistence

Boot or Logon Autostart Execution

2
T1547

Authentication Package

1
T1547.002

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Component Object Model Hijacking

1
T1546.015

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Authentication Package

1
T1547.002

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Component Object Model Hijacking

1
T1546.015

Defense Evasion

Deobfuscate/Decode Files or Information

1
T1140

Modify Registry

1
T1112

Credential Access

Discovery

Browser Information Discovery

1
T1217

Peripheral Device Discovery

1
T1120

Query Registry

4
T1012

System Information Discovery

5
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Time Discovery

1
T1124

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks