Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20231201-en
  • resource tags

    arch:x64arch:x86image:win7-20231201-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2023 15:08

General

  • Target

    bSee.exe

  • Size

    348KB

  • MD5

    629cefe795be0f1fd1ae952cc1eb79de

  • SHA1

    faedb770efe20006272183a5f6e4c99e39754c12

  • SHA256

    d47e620d1c305da86a151ae4e615aedcb53448c66808998251b407831d8f669b

  • SHA512

    0d774ce706def61a647b02bad28e76ef1d16475ac0b89faf50901b0496fe46e730f857eb8755dc6880fbf0f7e119518cc0dd67d930c7037bb2d3f6b75d0fb5af

  • SSDEEP

    6144:izNHXf500MJb3+/8baFioEbNX3OaHZ77T4RRC:8d50XLo+5XT4RRC

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

nodetecton.ddns.net:5552

Mutex

QSR_MUTEX_PV7LCoiUmiwD1RBPCq

Attributes
  • encryption_key

    eZUVZ8omJzgRh5woZARI

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 IoCs
  • Looks up external IP address via web service 5 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bSee.exe
    "C:\Users\Admin\AppData\Local\Temp\bSee.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\pFtLFvLBa3ZG.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2568
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2616
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          3⤵
          • Runs ping.exe
          PID:2648
        • C:\Users\Admin\AppData\Local\Temp\bSee.exe
          "C:\Users\Admin\AppData\Local\Temp\bSee.exe"
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1848
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\uRlhpQVuyEQZ.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1896
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              5⤵
                PID:1740
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                5⤵
                • Runs ping.exe
                PID:2296
              • C:\Users\Admin\AppData\Local\Temp\bSee.exe
                "C:\Users\Admin\AppData\Local\Temp\bSee.exe"
                5⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:1496

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\pFtLFvLBa3ZG.bat

        Filesize

        201B

        MD5

        0115c0f61b78219b7c53994dd7efbc40

        SHA1

        669521deacdd15c81098dd4d2d67049eebbe98a2

        SHA256

        ead907f8aadbb143cf22a393bbaf19bb369a9cb041195726eb1bff9a476aa467

        SHA512

        ee9d5373c5319ca47be96fe1eacac0eee6238c577045701711873fc1039896d940e56304522ae2e38fcb0a2bb7f797c172bd76cb828ce90b5896eb971ebd34e1

      • C:\Users\Admin\AppData\Local\Temp\pFtLFvLBa3ZG.bat

        Filesize

        201B

        MD5

        0115c0f61b78219b7c53994dd7efbc40

        SHA1

        669521deacdd15c81098dd4d2d67049eebbe98a2

        SHA256

        ead907f8aadbb143cf22a393bbaf19bb369a9cb041195726eb1bff9a476aa467

        SHA512

        ee9d5373c5319ca47be96fe1eacac0eee6238c577045701711873fc1039896d940e56304522ae2e38fcb0a2bb7f797c172bd76cb828ce90b5896eb971ebd34e1

      • C:\Users\Admin\AppData\Local\Temp\uRlhpQVuyEQZ.bat

        Filesize

        201B

        MD5

        c6e5f13489731f3b0e106a6d628ba419

        SHA1

        6ca0fc67ef2c4923bd6148aa63dfd73efc02a64c

        SHA256

        a83c3d6ab33c01b54c99c309fbb68feb6113546e348b261ecd05d7ab6d4ff041

        SHA512

        862eeda7c906a6d024908a71a28a4a0846fb96d2a7dfd0c2388772f9cefa8f8be09f3bf6286ccc2180a9b174be1524d580a55c6358726bec2ee44f576e1f73ef

      • C:\Users\Admin\AppData\Local\Temp\uRlhpQVuyEQZ.bat

        Filesize

        201B

        MD5

        c6e5f13489731f3b0e106a6d628ba419

        SHA1

        6ca0fc67ef2c4923bd6148aa63dfd73efc02a64c

        SHA256

        a83c3d6ab33c01b54c99c309fbb68feb6113546e348b261ecd05d7ab6d4ff041

        SHA512

        862eeda7c906a6d024908a71a28a4a0846fb96d2a7dfd0c2388772f9cefa8f8be09f3bf6286ccc2180a9b174be1524d580a55c6358726bec2ee44f576e1f73ef

      • memory/1496-31-0x0000000074A70000-0x000000007515E000-memory.dmp

        Filesize

        6.9MB

      • memory/1496-30-0x0000000074A70000-0x000000007515E000-memory.dmp

        Filesize

        6.9MB

      • memory/1496-29-0x0000000001220000-0x000000000127E000-memory.dmp

        Filesize

        376KB

      • memory/1640-0-0x0000000000020000-0x000000000007E000-memory.dmp

        Filesize

        376KB

      • memory/1640-3-0x0000000074A70000-0x000000007515E000-memory.dmp

        Filesize

        6.9MB

      • memory/1640-13-0x0000000074A70000-0x000000007515E000-memory.dmp

        Filesize

        6.9MB

      • memory/1640-1-0x0000000074A70000-0x000000007515E000-memory.dmp

        Filesize

        6.9MB

      • memory/1640-2-0x0000000004940000-0x0000000004980000-memory.dmp

        Filesize

        256KB

      • memory/1848-15-0x0000000074A20000-0x000000007510E000-memory.dmp

        Filesize

        6.9MB

      • memory/1848-16-0x0000000004A40000-0x0000000004A80000-memory.dmp

        Filesize

        256KB

      • memory/1848-17-0x0000000074A20000-0x000000007510E000-memory.dmp

        Filesize

        6.9MB

      • memory/1848-18-0x0000000004A40000-0x0000000004A80000-memory.dmp

        Filesize

        256KB

      • memory/1848-14-0x0000000001220000-0x000000000127E000-memory.dmp

        Filesize

        376KB

      • memory/1848-28-0x0000000074A20000-0x000000007510E000-memory.dmp

        Filesize

        6.9MB