General

  • Target

    dd9597fa53774b4c390543d13cd559d0d5223e1d4e3207b4ca5dd90acff8dbbd.exe

  • Size

    1003KB

  • Sample

    250116-bl4hyatmfy

  • MD5

    3e52270d58f81602e1004c6b4f72098f

  • SHA1

    c9b006dbcee2d2faa333cc1b3b2a4c47419f697d

  • SHA256

    dd9597fa53774b4c390543d13cd559d0d5223e1d4e3207b4ca5dd90acff8dbbd

  • SHA512

    7926b744b212a02a5c90242e58bc6f6ee7864d16c523569e2f8d2577dcbc30ee70fd0712cea00892e1e122991b6f283edb40182bdd106b280f723ed4092606d8

  • 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

      dd9597fa53774b4c390543d13cd559d0d5223e1d4e3207b4ca5dd90acff8dbbd.exe

    • Size

      1003KB

    • MD5

      3e52270d58f81602e1004c6b4f72098f

    • SHA1

      c9b006dbcee2d2faa333cc1b3b2a4c47419f697d

    • SHA256

      dd9597fa53774b4c390543d13cd559d0d5223e1d4e3207b4ca5dd90acff8dbbd

    • SHA512

      7926b744b212a02a5c90242e58bc6f6ee7864d16c523569e2f8d2577dcbc30ee70fd0712cea00892e1e122991b6f283edb40182bdd106b280f723ed4092606d8

    • 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