General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    240407-wd133aab7w

  • MD5

    145193333e64b74823c421d26f035480

  • SHA1

    f9919b3e81793fc5ccfb48dff30606c08523361c

  • SHA256

    d57cd430c390790a495769b537242d522c25dbec4b01acf7f47b992882c37bfa

  • SHA512

    353b4e0f96f95b0ba553aaecb4b27e53c6d9fe9625547e2d614820aecd4a5103fb1b7a42d0e4eac055404c384e00ee7d046167f86f6743c374a2a9f5813aaf0a

  • SSDEEP

    49152:KvjI22SsaNYfdPBldt698dBcjH361lpoGdVnTHHB72eh2NT:Kvc22SsaNYfdPBldt6+dBcjH361/F

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

2.tcp.eu.ngrok.io:16096

Mutex

755f883f-4d58-4349-bc9e-f21c4e163b6f

Attributes
  • encryption_key

    EE65D8F2E429F4900E3A17963595716D863A2455

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      145193333e64b74823c421d26f035480

    • SHA1

      f9919b3e81793fc5ccfb48dff30606c08523361c

    • SHA256

      d57cd430c390790a495769b537242d522c25dbec4b01acf7f47b992882c37bfa

    • SHA512

      353b4e0f96f95b0ba553aaecb4b27e53c6d9fe9625547e2d614820aecd4a5103fb1b7a42d0e4eac055404c384e00ee7d046167f86f6743c374a2a9f5813aaf0a

    • SSDEEP

      49152:KvjI22SsaNYfdPBldt698dBcjH361lpoGdVnTHHB72eh2NT:Kvc22SsaNYfdPBldt6+dBcjH361/F

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks