General

  • Target

    https://cdn.discordapp.com/attachments/1242894251415703732/1242899199444652163/SolaraB_1.zip?ex=664f8395&is=664e3215&hm=c2fe8a0463a3540ede774dfe6af1ad16a6acbcca311501eaec0b618dc39d7668&

  • Sample

    240522-wkcn2sba8y

Malware Config

Targets

    • Target

      https://cdn.discordapp.com/attachments/1242894251415703732/1242899199444652163/SolaraB_1.zip?ex=664f8395&is=664e3215&hm=c2fe8a0463a3540ede774dfe6af1ad16a6acbcca311501eaec0b618dc39d7668&

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Sets file execution options in registry

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • Checks system information in the registry

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

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks