General

  • Target

    free_robux.exe

  • Size

    2.8MB

  • Sample

    240416-2g9ghaee23

  • MD5

    1535aa21451192109b86be9bcc7c4345

  • SHA1

    1af211c686c4d4bf0239ed6620358a19691cf88c

  • SHA256

    4641af6a0071e11e13ad3b1cd950e01300542c2b9efb6ae92ffecedde974a4a6

  • SHA512

    1762b29f7b26911a7e6d244454eac7268235e2e0c27cd2ca639b8acdde2528c9ddf202ed59ca3155ee1d6ad3deba559a6eaf4ed74624c68688761e3e404e54da

  • SSDEEP

    49152:5aA7f7tlVmdqK23H2bpHI4Qs5ABV9WRHZRsgI82lcHGAaKLinXBgJ:Q+VMkX224QsWBq5SfARGRgJ

Malware Config

Targets

    • Target

      free_robux.exe

    • Size

      2.8MB

    • MD5

      1535aa21451192109b86be9bcc7c4345

    • SHA1

      1af211c686c4d4bf0239ed6620358a19691cf88c

    • SHA256

      4641af6a0071e11e13ad3b1cd950e01300542c2b9efb6ae92ffecedde974a4a6

    • SHA512

      1762b29f7b26911a7e6d244454eac7268235e2e0c27cd2ca639b8acdde2528c9ddf202ed59ca3155ee1d6ad3deba559a6eaf4ed74624c68688761e3e404e54da

    • SSDEEP

      49152:5aA7f7tlVmdqK23H2bpHI4Qs5ABV9WRHZRsgI82lcHGAaKLinXBgJ:Q+VMkX224QsWBq5SfARGRgJ

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Modifies Installed Components in the registry

    • Modifies Windows Firewall

    • Sets file execution options in registry

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • UPX packed file

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

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Checks whether UAC is enabled

    • Creates a large amount of network flows

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

    • Enumerates connected drives

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

    • Legitimate hosting services abused for malware hosting/C2

    • Writes to the Master Boot Record (MBR)

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

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks