General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    241110-r2we9syja1

  • MD5

    403d20c63335b299c8bcbe4c6e49231e

  • SHA1

    b581c2ca151a033dd10dca736ea76cf29278f498

  • SHA256

    db857bc6602026ddfd794ec8c167ede510ca24d46d1de71fac1357c1f4f34bfb

  • SHA512

    68418311a5e6cf5a81205513cb2beefc164a913c8f361c7405698948977f77ef4e682aeef651844f9e2da1b6fba978d6f5b97f9fe0780d6b0b91d34a0ea6570a

  • SSDEEP

    49152:rvrhBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkadReEErHgk/uVkoGduLTHHB72eh2NT:rvjt2d5aKCuVPzlEmVQ0wvwfdRe6C+

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

gorodpro-37914.portmap.host:37914

Mutex

1c5ec883-e96d-4a3a-9035-7a940d47aeb7

Attributes
  • encryption_key

    99E87F88E9E967A51725453CB8223ADDB8256DE2

  • install_name

    WindowsDefender.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Defender

  • subdirectory

    WindowsDefender

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      403d20c63335b299c8bcbe4c6e49231e

    • SHA1

      b581c2ca151a033dd10dca736ea76cf29278f498

    • SHA256

      db857bc6602026ddfd794ec8c167ede510ca24d46d1de71fac1357c1f4f34bfb

    • SHA512

      68418311a5e6cf5a81205513cb2beefc164a913c8f361c7405698948977f77ef4e682aeef651844f9e2da1b6fba978d6f5b97f9fe0780d6b0b91d34a0ea6570a

    • SSDEEP

      49152:rvrhBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkadReEErHgk/uVkoGduLTHHB72eh2NT:rvjt2d5aKCuVPzlEmVQ0wvwfdRe6C+

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Executes dropped EXE

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

MITRE ATT&CK Enterprise v15

Tasks