Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231130-en
  • resource tags

    arch:x64arch:x86image:win7-20231130-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2023 15:09

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:2152
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\XWMigcC5EOGm.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2520
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2704
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          3⤵
          • Runs ping.exe
          PID:2716
        • 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:2216
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\G12e28CnefKZ.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:2368
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              5⤵
                PID:940
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                5⤵
                • Runs ping.exe
                PID:1712
              • C:\Users\Admin\AppData\Local\Temp\bSee.exe
                "C:\Users\Admin\AppData\Local\Temp\bSee.exe"
                5⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2188

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\G12e28CnefKZ.bat

        Filesize

        201B

        MD5

        fa3a07a7016ec1129c111c02d2e00eef

        SHA1

        4c22695e4e807a403a830835afdd04f730d56437

        SHA256

        923538176eb63cd36d3ae2453443f10b3103be940ae8968074acf87b5bd55442

        SHA512

        521c9e3e3e3fcc627420d67d3a1f8ad04c32141b36d4b030dbf0fcd3714cd4256727f49a496d4bc45f0e65075c60e00dbe240245ba96fc4fea02b5ddaba14df4

      • C:\Users\Admin\AppData\Local\Temp\G12e28CnefKZ.bat

        Filesize

        201B

        MD5

        fa3a07a7016ec1129c111c02d2e00eef

        SHA1

        4c22695e4e807a403a830835afdd04f730d56437

        SHA256

        923538176eb63cd36d3ae2453443f10b3103be940ae8968074acf87b5bd55442

        SHA512

        521c9e3e3e3fcc627420d67d3a1f8ad04c32141b36d4b030dbf0fcd3714cd4256727f49a496d4bc45f0e65075c60e00dbe240245ba96fc4fea02b5ddaba14df4

      • C:\Users\Admin\AppData\Local\Temp\XWMigcC5EOGm.bat

        Filesize

        201B

        MD5

        4dc76c3377b620a56ee5078c0a9cb6af

        SHA1

        5d725ccad6a8061fc3e10412e4029280d072deb9

        SHA256

        8854f4ee91da04aaaf99aa72deb0352f2fbea4ccf408b254953aa2c33903e77e

        SHA512

        9b015c49079df55db5f4ae17f67876fb72c3a333ae080d85dce0cebd7b8030f245ec37d2043959d549a25170cfef98994791bdb3701de06ee1a1002595864ef4

      • C:\Users\Admin\AppData\Local\Temp\XWMigcC5EOGm.bat

        Filesize

        201B

        MD5

        4dc76c3377b620a56ee5078c0a9cb6af

        SHA1

        5d725ccad6a8061fc3e10412e4029280d072deb9

        SHA256

        8854f4ee91da04aaaf99aa72deb0352f2fbea4ccf408b254953aa2c33903e77e

        SHA512

        9b015c49079df55db5f4ae17f67876fb72c3a333ae080d85dce0cebd7b8030f245ec37d2043959d549a25170cfef98994791bdb3701de06ee1a1002595864ef4

      • memory/2152-1-0x0000000074BD0000-0x00000000752BE000-memory.dmp

        Filesize

        6.9MB

      • memory/2152-3-0x0000000074BD0000-0x00000000752BE000-memory.dmp

        Filesize

        6.9MB

      • memory/2152-13-0x0000000074BD0000-0x00000000752BE000-memory.dmp

        Filesize

        6.9MB

      • memory/2152-0-0x0000000000D70000-0x0000000000DCE000-memory.dmp

        Filesize

        376KB

      • memory/2152-2-0x0000000000650000-0x0000000000690000-memory.dmp

        Filesize

        256KB

      • memory/2188-30-0x0000000004420000-0x0000000004460000-memory.dmp

        Filesize

        256KB

      • memory/2188-28-0x0000000000E10000-0x0000000000E6E000-memory.dmp

        Filesize

        376KB

      • memory/2188-29-0x0000000074BD0000-0x00000000752BE000-memory.dmp

        Filesize

        6.9MB

      • memory/2216-17-0x0000000074B80000-0x000000007526E000-memory.dmp

        Filesize

        6.9MB

      • memory/2216-27-0x0000000074B80000-0x000000007526E000-memory.dmp

        Filesize

        6.9MB

      • memory/2216-16-0x00000000044D0000-0x0000000004510000-memory.dmp

        Filesize

        256KB

      • memory/2216-14-0x0000000000D70000-0x0000000000DCE000-memory.dmp

        Filesize

        376KB

      • memory/2216-15-0x0000000074B80000-0x000000007526E000-memory.dmp

        Filesize

        6.9MB