General

  • Target
    RollbackDolby-v1.2.0.81-20260626.rar
  • Size 5.8MB
  • Sample260919-pkgjns1sax
  • SHA256 1002b1af8d44a395083e97ce9b1c5b4023c7523cfda85804c207fd6c92d779de
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      RollbackDolby-v1.2.0.81-20260626.rar
    • Size 5.8MB
    • SHA256 1002b1af8d44a395083e97ce9b1c5b4023c7523cfda85804c207fd6c92d779de
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Contacts a large (582) amount of remote hosts

      This may indicate a network scan to discover remotely running services.

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Possible privilege escalation attempt

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • 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 desktop.ini file(s)

    • Mark of the Web detected: This indicates that the page was originally saved or cloned.

    • Executes a VBScript file via the Windows Script Host.

    • Target
      RollbackDolby.exe
    • Size 7.4MB
    • SHA256 45cbc4c70c22d67f12a648a1e23f2026e6b3e21bfdb824765fbb3ec69c5cd7b3
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Enumerates connected drives

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

MITRE ATT&CK Enterprise v16

Tasks