Overview

overview

10

Static

static

10

RBypass.exe

windows7-x64

10

RBypass.exe

windows10-2004-x64

Sharing

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General

  • Target
    RBypass.exe
  • Size 3.1MB
  • Sample240227-ynbl9sac4s
  • SHA256 4cb1ad9188a93cc51b8a41d69b1fd8217ea2e16e6f94616ffc759737abda8755
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • 86.13.66.89:4782

Mutex

  • 584f887c-7024-4e16-a56b-684919f2613f

Attributes
  • encryption_key

    F478C43DE74A681AD4F5AF6B28E598051B310CDC

  • install_name

    WPShell.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows PowerShell

  • subdirectory

    SubDir

Targets

    • Target
      RBypass.exe
    • Size 3.1MB
    • SHA256 4cb1ad9188a93cc51b8a41d69b1fd8217ea2e16e6f94616ffc759737abda8755
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks