Resubmissions

24/09/2026, 16:49

260924-vb2fdayzdx7

24/09/2026, 16:27

260924-tx2slaysfs10

General

  • Target
    AP Biology - Macromolecules.pptx
  • Size 4.0MB
  • Sample260924-tx2slaysfs
  • SHA256 73a668f89d727015962a727cf2d3edc5a446b9da10718cba4dfec6525ed6bc20
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      AP Biology - Macromolecules.pptx
    • Size 4.0MB
    • SHA256 73a668f89d727015962a727cf2d3edc5a446b9da10718cba4dfec6525ed6bc20
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Chaos Ransomware

    • Family: Chaos

      Ransomware family first seen in June 2021.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Modifies boot configuration data using bcdedit

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

    • Disables Task Manager via registry modification

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • 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)

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Executes a VBScript file via the Windows Script Host.

    • Sets desktop wallpaper using registry

    • UPX packed file

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

MITRE ATT&CK Enterprise v16

Tasks