Resubmissions

29-03-2024 11:57

240329-n4j88sgh75 1

28-03-2024 17:14

240328-vsb7tacd23 10

27-03-2024 09:26

240327-legqpscd2x 7

26-03-2024 10:44

240326-msx6aabc2s 10

25-03-2024 13:29

240325-qrh7hscb7s 10

General

  • Target

    https://youtube.com

  • Sample

    240326-msx6aabc2s

Malware Config

Targets

    • Target

      https://youtube.com

    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

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

    • XMRig Miner payload

    • Creates new service(s)

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Stops running service(s)

    • 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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • UPX packed file

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks