General

  • Target

    Client-built.exe

  • Size

    502KB

  • Sample

    240727-xpw4xsxand

  • MD5

    b11cfa8acb693b17695f12c8c864af68

  • SHA1

    6ea82c6078f49894329e62636a3662aef379bb6c

  • SHA256

    a61f6f2d56a993cb1e1aaf9f83efb9b3bc83df0d8f8b8f142dc36e2f7d66b27b

  • SHA512

    86b7ea4110e59f2089aa43506b62195ab79aae90f86f15f60c2832e5dccd6b16b9724d7e733e7eb467cd971555dbc7cdc7cba85c9592fb82475483d60681a2b6

  • SSDEEP

    6144:cTEgdc0YyXiPUEXaR8AN85qmqKQVXzzqqncEgDb8UX0PoGz89cycTR3g:cTEgdfYzUEZqdwfEgeccycdg

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

me:4782

Mutex

4e19accb-bc80-45aa-917d-d5dca33ad8f0

Attributes
  • encryption_key

    3B611D04AAFAB02940B8BD5BC8618AF575293F55

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    2996

  • startup_key

    system

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      502KB

    • MD5

      b11cfa8acb693b17695f12c8c864af68

    • SHA1

      6ea82c6078f49894329e62636a3662aef379bb6c

    • SHA256

      a61f6f2d56a993cb1e1aaf9f83efb9b3bc83df0d8f8b8f142dc36e2f7d66b27b

    • SHA512

      86b7ea4110e59f2089aa43506b62195ab79aae90f86f15f60c2832e5dccd6b16b9724d7e733e7eb467cd971555dbc7cdc7cba85c9592fb82475483d60681a2b6

    • SSDEEP

      6144:cTEgdc0YyXiPUEXaR8AN85qmqKQVXzzqqncEgDb8UX0PoGz89cycTR3g:cTEgdfYzUEZqdwfEgeccycdg

    • 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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks