General

  • Target

    calc.exe

  • Size

    27KB

  • Sample

    230408-qlstrsdd89

  • MD5

    5da8c98136d98dfec4716edd79c7145f

  • SHA1

    ed13af4a0a754b8daee4929134d2ff15ebe053cd

  • SHA256

    58189cbd4e6dc0c7d8e66b6a6f75652fc9f4afc7ce0eba7d67d8c3feb0d5381f

  • SHA512

    6e2b067760ec178cdcc4df04c541ce6940fc2a0cdd36f57f4d6332e38119dbc5e24eb67c11d2c8c8ffeed43533c2dd8b642d2c7c997c392928091b5ccce7582a

  • SSDEEP

    384:Otj8FKzuRxmeWCJxhd2WS/YWyiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiLiiiB:QXif4CbPQ7

Malware Config

Targets

    • Target

      calc.exe

    • Size

      27KB

    • MD5

      5da8c98136d98dfec4716edd79c7145f

    • SHA1

      ed13af4a0a754b8daee4929134d2ff15ebe053cd

    • SHA256

      58189cbd4e6dc0c7d8e66b6a6f75652fc9f4afc7ce0eba7d67d8c3feb0d5381f

    • SHA512

      6e2b067760ec178cdcc4df04c541ce6940fc2a0cdd36f57f4d6332e38119dbc5e24eb67c11d2c8c8ffeed43533c2dd8b642d2c7c997c392928091b5ccce7582a

    • SSDEEP

      384:Otj8FKzuRxmeWCJxhd2WS/YWyiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiLiiiB:QXif4CbPQ7

    • Modifies security service

    • Modifies boot configuration data using bcdedit

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Registers COM server for autorun

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • 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.

    • 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 Enterprise v6

Tasks