Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    27/03/2025, 03:03

General

  • Target

    c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe

  • Size

    947KB

  • MD5

    964efbbcba7f76c77d831f02fdc30de4

  • SHA1

    1ec5e6ac8d0154eca145460e1b349cd49b06fb46

  • SHA256

    c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6

  • SHA512

    a78d5134be0c9c4cbe44fb63309f895946a666306b757622c3d7e715d3c87d056a24dcdcf8f3cd303424ad00861d113ec7aa812088015fb2ec07b2b018a3f990

  • SSDEEP

    24576:IOdMrF///F53jIWQuTXIZK131ZEhNT8rlwR4QM:ah

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office05

C2

morelogs.thruhere.net:4788

Mutex

QSR_MUTEX_vpuZcEVGdqV4nkKTlB

Attributes
  • encryption_key

    rHoRBOHzyexwZPVgy5QT

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT 3 IoCs

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 7 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
    "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
    1⤵
    • Quasar RAT
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2808
    • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
      "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2248
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\2GhKCOmsMp2F.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2776
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3060
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:2916
        • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
          "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
          4⤵
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2628
          • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
            "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
            5⤵
              PID:268
            • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
              "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
              5⤵
                PID:580
              • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
                "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
                5⤵
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:2456
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /c ""C:\Users\Admin\AppData\Local\Temp\cramUufseW39.bat" "
                  6⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:1336
                  • C:\Windows\SysWOW64\chcp.com
                    chcp 65001
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:552
                  • C:\Windows\SysWOW64\PING.EXE
                    ping -n 10 localhost
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Runs ping.exe
                    PID:964
                  • C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe
                    "C:\Users\Admin\AppData\Local\Temp\c8f09665c4c94041dd63191d0ea1b0f5092dc636eea7191242a7d7da9d7fa8b6.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1832

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\2GhKCOmsMp2F.bat

        Filesize

        261B

        MD5

        9a197e2db163470347556e2784fd538b

        SHA1

        730c76847ee7563b328c3c8698e875e6723454a7

        SHA256

        76f9d8682efd091d49c206d3af28ddb4d4500f9b85538266db6fac17c43d5cce

        SHA512

        73c3171804f0b90480106ee3ade87583bfe429ceef92eee9fef53eb8d6dadb9e637e899b6c4a065d278a38a002b532f53517c22a53de63fb9a15d75e06ae5141

      • C:\Users\Admin\AppData\Local\Temp\cramUufseW39.bat

        Filesize

        261B

        MD5

        77928ddb25d9f2bd81cc0965acb035d3

        SHA1

        cfa8e099b05a227036a7a32b6f903a09eb3667d2

        SHA256

        c3e0a75ac657f466d1ce9604cbb082d0139de9d265f71ce2804c71430e25e007

        SHA512

        4824cff2b852ea82856d076ee20361b95aba64eedcc8d561940dff560c9e10b2e32f1e077e2a68bf2b7491f8261508520189bbf6199d57e45a7726a1fa2bb5fc

      • memory/1832-53-0x0000000000220000-0x0000000000312000-memory.dmp

        Filesize

        968KB

      • memory/2248-13-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2248-19-0x0000000074300000-0x00000000749EE000-memory.dmp

        Filesize

        6.9MB

      • memory/2248-29-0x0000000074300000-0x00000000749EE000-memory.dmp

        Filesize

        6.9MB

      • memory/2248-8-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2248-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2248-10-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2248-7-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2248-15-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2248-17-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2248-20-0x0000000074300000-0x00000000749EE000-memory.dmp

        Filesize

        6.9MB

      • memory/2248-6-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2456-43-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2456-42-0x0000000000400000-0x000000000045E000-memory.dmp

        Filesize

        376KB

      • memory/2456-40-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2628-31-0x00000000001A0000-0x0000000000292000-memory.dmp

        Filesize

        968KB

      • memory/2808-5-0x0000000000320000-0x000000000033C000-memory.dmp

        Filesize

        112KB

      • memory/2808-18-0x0000000074300000-0x00000000749EE000-memory.dmp

        Filesize

        6.9MB

      • memory/2808-1-0x00000000008F0000-0x00000000009E2000-memory.dmp

        Filesize

        968KB

      • memory/2808-3-0x0000000000820000-0x0000000000886000-memory.dmp

        Filesize

        408KB

      • memory/2808-9-0x0000000074300000-0x00000000749EE000-memory.dmp

        Filesize

        6.9MB

      • memory/2808-2-0x000000007430E000-0x000000007430F000-memory.dmp

        Filesize

        4KB

      • memory/2808-0-0x000000007430E000-0x000000007430F000-memory.dmp

        Filesize

        4KB