General

  • Target

    0x001a00000002ab29-1094.bat

  • Size

    7.3MB

  • Sample

    250104-b8y7qsvkez

  • MD5

    1bec1098946595a03fa067a3ef7ce292

  • SHA1

    89cfb4a2f8800f1b944d906d959639907672317d

  • SHA256

    a8f184a333fb89f41ddca323472463b4ee2cbed63d26d105823300148e2015cb

  • SHA512

    dc7e73ed353d50b73a0eb6f1d955812a29fc5e05df300487d1eda49cc78e6748929a17cd59b58148f7e8696fd0fdfd21e8269af6788f1037bda6d8ddf30c6082

  • SSDEEP

    49152:262lW3ZtqF71E0f+DP24xmB1F+RfHhZzvTUPbFJMg0FQ5/Ai4cr5YSW7iFsihJv1:k

Malware Config

Extracted

Family

quasar

Attributes
  • encryption_key

    6F38862AF940DB0B877E1A5C024641D617D7FAB6

  • reconnect_delay

    3000

Targets

    • Target

      0x001a00000002ab29-1094.bat

    • Size

      7.3MB

    • MD5

      1bec1098946595a03fa067a3ef7ce292

    • SHA1

      89cfb4a2f8800f1b944d906d959639907672317d

    • SHA256

      a8f184a333fb89f41ddca323472463b4ee2cbed63d26d105823300148e2015cb

    • SHA512

      dc7e73ed353d50b73a0eb6f1d955812a29fc5e05df300487d1eda49cc78e6748929a17cd59b58148f7e8696fd0fdfd21e8269af6788f1037bda6d8ddf30c6082

    • SSDEEP

      49152:262lW3ZtqF71E0f+DP24xmB1F+RfHhZzvTUPbFJMg0FQ5/Ai4cr5YSW7iFsihJv1:k

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Sets service image path in registry

    • Checks BIOS information in registry

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

    • Deletes itself

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • 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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks