General

  • Target

    https://www.google.com/search?q=(https%3A%2F%2Fsupport.frescologic.com%2Fportal%2Fkb%2Farticles%2Flatest-drivers)&rlz=1C1GCEW_enUS1051US1051&oq=(https%3A%2F%2Fsupport.frescologic.com%2Fportal%2Fkb%2Farticles%2Flatest-drivers)&aqs=chrome..69i57j0i22i30.1470j0j7&sourceid=chrome&ie=UTF-8&safe=active&ssui=on

  • Sample

    230406-res2mafc6t

Malware Config

Targets

    • Target

      https://www.google.com/search?q=(https%3A%2F%2Fsupport.frescologic.com%2Fportal%2Fkb%2Farticles%2Flatest-drivers)&rlz=1C1GCEW_enUS1051US1051&oq=(https%3A%2F%2Fsupport.frescologic.com%2Fportal%2Fkb%2Farticles%2Flatest-drivers)&aqs=chrome..69i57j0i22i30.1470j0j7&sourceid=chrome&ie=UTF-8&safe=active&ssui=on

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Checks computer location settings

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

    • 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.

    • UPX packed file

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

    • 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.

    • Enumerates connected drives

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

    • Writes to the Master Boot Record (MBR)

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

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

6
T1012

System Information Discovery

5
T1082

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

1
T1005

Tasks