General

  • Target

    NezurExternal.exe

  • Size

    16.7MB

  • Sample

    241111-zznawavrew

  • MD5

    16633521375e4c41f42795772b2f3d8c

  • SHA1

    4d91dc868bdcf8ac30e497fb228c7da7e727e8c9

  • SHA256

    c50571f4804e26df25659624ee28ab859eb10fa1040c85d6f484e236a561798a

  • SHA512

    63ec8de664fd2aa9bd43e6e7ecf3d3e451da942852b333810a80cf38ee1e2f79d3760cbc8d42e2961c3538539571a26114597caba6396205f5924941fb90ea8c

  • SSDEEP

    196608:7dtABVEjBCvHs1jgGbd/o+XhZdxc4dKFJvm80Qn3fgjtak9+rrtRyomypejC4zQT:L+s1ho+Xh1c4doJfRfgjtaRrJRyjNs

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Nezur

C2

dagoatlandon-37755.portmap.host:37755

Mutex

3ddf884f-be3a-435b-88a2-f9e41fc7a24a

Attributes
  • encryption_key

    FDDCE55D0A4786102F3BB3EE51B9C335B8CC8CCF

  • install_name

    Windows.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsUpdate

  • subdirectory

    SubDir

Targets

    • Target

      NezurExternal.exe

    • Size

      16.7MB

    • MD5

      16633521375e4c41f42795772b2f3d8c

    • SHA1

      4d91dc868bdcf8ac30e497fb228c7da7e727e8c9

    • SHA256

      c50571f4804e26df25659624ee28ab859eb10fa1040c85d6f484e236a561798a

    • SHA512

      63ec8de664fd2aa9bd43e6e7ecf3d3e451da942852b333810a80cf38ee1e2f79d3760cbc8d42e2961c3538539571a26114597caba6396205f5924941fb90ea8c

    • SSDEEP

      196608:7dtABVEjBCvHs1jgGbd/o+XhZdxc4dKFJvm80Qn3fgjtak9+rrtRyomypejC4zQT:L+s1ho+Xh1c4doJfRfgjtaRrJRyjNs

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

MITRE ATT&CK Enterprise v15

Tasks