Resubmissions

22-05-2024 02:46

240522-c9r1gshh44 10

22-05-2024 02:41

240522-c6yzmahh8x 8

General

  • Target

    utweb_installer.exe

  • Size

    1.7MB

  • Sample

    240522-c6yzmahh8x

  • MD5

    5285ef6e9757a6d1335cdae5cbf4e05f

  • SHA1

    cf79734fceb53a6871d8c5b50f0479d466c05144

  • SHA256

    a75c4cafd609535d2a23100e403be32723d8d64541f28389f2c857cd2d0b74cc

  • SHA512

    f0c551557cef134a8a47183337063453833e2b11a0c6ff57e1a209338bb57b5884eb52fbe9d5e83f3f549e0f1dbd46bd877d3749e8dbf7f8b34e25d6bcb907e6

  • SSDEEP

    24576:u7FUDowAyrTVE3U5FPF248wUMYSAba9ZA3mKZtMr3c7YB/LfDUkPV39qJ3XNEQh:uBuZrEUpx8wUGAuhKrMr3gE/LbUp3dRh

Malware Config

Targets

    • Target

      utweb_installer.exe

    • Size

      1.7MB

    • MD5

      5285ef6e9757a6d1335cdae5cbf4e05f

    • SHA1

      cf79734fceb53a6871d8c5b50f0479d466c05144

    • SHA256

      a75c4cafd609535d2a23100e403be32723d8d64541f28389f2c857cd2d0b74cc

    • SHA512

      f0c551557cef134a8a47183337063453833e2b11a0c6ff57e1a209338bb57b5884eb52fbe9d5e83f3f549e0f1dbd46bd877d3749e8dbf7f8b34e25d6bcb907e6

    • SSDEEP

      24576:u7FUDowAyrTVE3U5FPF248wUMYSAba9ZA3mKZtMr3c7YB/LfDUkPV39qJ3XNEQh:uBuZrEUpx8wUGAuhKrMr3gE/LbUp3dRh

    • 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.

    • Sets service image path in registry

    • 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 for any installed AV software in registry

    • Checks whether UAC is enabled

    • Downloads MZ/PE file

    • Modifies Installed Components in the registry

    • Sets file execution options in registry

    • Writes to the Master Boot Record (MBR)

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

    • Checks computer location settings

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks