General

  • Target

    a5fa5d614116a0fe39b35350d908a55d509b6fd1653d67bc5038df3a9c1016d5N.exe

  • Size

    1.1MB

  • Sample

    241123-ng72satnhw

  • MD5

    367bbab6aba76421003746f805a24c90

  • SHA1

    bd9661a5b2dd0f74c561448979b302bc864d89b4

  • SHA256

    a5fa5d614116a0fe39b35350d908a55d509b6fd1653d67bc5038df3a9c1016d5

  • SHA512

    ab37bff13e60a0ef9eac6e3bd67dbd11fec8206bf30c944cd8594d7f7986402b2ca35678adec1010a37e3c0f086e234f57c48c627e4b95117eef7d919e40d9dc

  • SSDEEP

    24576:9zZKZ6kSKsCiYqKg3ADrO2paC5fgV2kx9h6ujUh/ivuWIWI:9E63KsCbgm9paCyVi4q

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

__6__

C2

64.52.80.186:3978

Mutex

ulOlko6PwDtcon56WvJZSFPEGU5NfnDPI9Bag8WGNvXDkhbNG4aj8Z

Attributes
  • encryption_key

    Pj9FPvaD3lwN1r1o4n87

  • install_name

    csrss.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    NET framework

  • subdirectory

    SubDir

Targets

    • Target

      a5fa5d614116a0fe39b35350d908a55d509b6fd1653d67bc5038df3a9c1016d5N.exe

    • Size

      1.1MB

    • MD5

      367bbab6aba76421003746f805a24c90

    • SHA1

      bd9661a5b2dd0f74c561448979b302bc864d89b4

    • SHA256

      a5fa5d614116a0fe39b35350d908a55d509b6fd1653d67bc5038df3a9c1016d5

    • SHA512

      ab37bff13e60a0ef9eac6e3bd67dbd11fec8206bf30c944cd8594d7f7986402b2ca35678adec1010a37e3c0f086e234f57c48c627e4b95117eef7d919e40d9dc

    • SSDEEP

      24576:9zZKZ6kSKsCiYqKg3ADrO2paC5fgV2kx9h6ujUh/ivuWIWI:9E63KsCbgm9paCyVi4q

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Enumerates processes with tasklist

MITRE ATT&CK Enterprise v15

Tasks