General

  • Target

    89f1d675850c32ef010fc8f96e597fbb8ed41a9b92434688ffd1fc4be8002606N.exe

  • Size

    1003KB

  • Sample

    250116-g6zndawpdx

  • MD5

    f1f907b229714e2a51a992a98f1dcea0

  • SHA1

    9ee1c94d609ebf7657c2c53740d264a7181fa4b2

  • SHA256

    89f1d675850c32ef010fc8f96e597fbb8ed41a9b92434688ffd1fc4be8002606

  • SHA512

    59e9baabc01ea92d10c645a9bf6a4872c426ee30c11dda7626e6c70ddc0d08946e935293292c614f2c028f330a00db3af9d680c05a754dc2c35df94473e24dda

  • SSDEEP

    24576:NGd7ccE0a+UXGSafMOjDs3Cb94oKnCV8LvxXa0qOvOZth:QAcE0a7X2MOTanCV8LdrqcQh

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

C2

85.192.29.60:2222

Mutex

hEFq7q568Cnv4s150F

Attributes
  • encryption_key

    u7RV46VO1ujjhG9W4FhR

  • install_name

    csrss.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    NET framework

  • subdirectory

    SubDir

Targets

    • Target

      89f1d675850c32ef010fc8f96e597fbb8ed41a9b92434688ffd1fc4be8002606N.exe

    • Size

      1003KB

    • MD5

      f1f907b229714e2a51a992a98f1dcea0

    • SHA1

      9ee1c94d609ebf7657c2c53740d264a7181fa4b2

    • SHA256

      89f1d675850c32ef010fc8f96e597fbb8ed41a9b92434688ffd1fc4be8002606

    • SHA512

      59e9baabc01ea92d10c645a9bf6a4872c426ee30c11dda7626e6c70ddc0d08946e935293292c614f2c028f330a00db3af9d680c05a754dc2c35df94473e24dda

    • SSDEEP

      24576:NGd7ccE0a+UXGSafMOjDs3Cb94oKnCV8LvxXa0qOvOZth:QAcE0a7X2MOTanCV8LdrqcQh

    • 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