General

  • Target
    PDF_Upgrade_Installation.vbs
  • Size 16.0MB
  • Sample260910-amxw4scj2y
  • SHA256 3199b8a0398994b0126a1e642618b5ba903acaeec64afd48f59a7bffd9045971
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      PDF_Upgrade_Installation.vbs
    • Size 16.0MB
    • SHA256 3199b8a0398994b0126a1e642618b5ba903acaeec64afd48f59a7bffd9045971
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Sets service image path in registry

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

    • Signed with revoked ConnectWise certificate

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

    • Checks computer location settings

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

    • ConnectWise ScreenConnect remote access tool

      ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

    • 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.

    • Executes dropped EXE

    • Loads dropped DLL

    • Deobfuscate/Decode Files or Information

      Payload decoded via CertUtil.

    • 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.

    • Drops file in System32 directory

    • Executes a VBScript file via the Windows Script Host.

MITRE ATT&CK Enterprise v16

Tasks