Analysis

  • max time kernel
    146s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:10

General

  • Target

    f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe

  • Size

    265KB

  • MD5

    695c14c51ae9ff59157cf69f97b2d1cc

  • SHA1

    4688eea11efa5c61c7704b5ca80196eb9099e867

  • SHA256

    f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1

  • SHA512

    e43e45420544f2fd736f2427443941f1da5b8d4a74d4c9d2e0a95c8306b2f10e12beaa6b0c2ec2715ecbd66b41431f404c942c32720a8b3ee2afa640657d4688

  • SSDEEP

    3072:d6LaowspCAE+mYgDxv5l7Iek5Ym7IQoiteVFWbVD22WsgAsR6c7ovb3TQh9:SaWCAF5Cf7Iem57InitGMxycQMrT

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe
    "C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\czbtxuaa\
      2⤵
        PID:2992
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bqipusxp.exe" C:\Windows\SysWOW64\czbtxuaa\
        2⤵
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create czbtxuaa binPath= "C:\Windows\SysWOW64\czbtxuaa\bqipusxp.exe /d\"C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2740
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description czbtxuaa "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start czbtxuaa
          2⤵
          • Launches sc.exe
          PID:2688
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:3040
      • C:\Windows\SysWOW64\czbtxuaa\bqipusxp.exe
        C:\Windows\SysWOW64\czbtxuaa\bqipusxp.exe /d"C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2528
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
            PID:2548

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\bqipusxp.exe

                Filesize

                10.7MB

                MD5

                02873941013cbb7550be3392aaa4eb9f

                SHA1

                24cf2735fdb09b6d771d18af18de08b27cf8c5dd

                SHA256

                7b72b209c31a31094c70eb4494f66b4b0271dccb268a0fdee4a0d8cfeaa3d125

                SHA512

                8736325720f89a33bd9ca4203c162278b5364747f7b3062cf5ea9f76a0cf301c336a0428718204b996245b505a70858da1ba9400f782c74f8ee8353a02b19a14

              • C:\Windows\SysWOW64\czbtxuaa\bqipusxp.exe

                Filesize

                10.7MB

                MD5

                02873941013cbb7550be3392aaa4eb9f

                SHA1

                24cf2735fdb09b6d771d18af18de08b27cf8c5dd

                SHA256

                7b72b209c31a31094c70eb4494f66b4b0271dccb268a0fdee4a0d8cfeaa3d125

                SHA512

                8736325720f89a33bd9ca4203c162278b5364747f7b3062cf5ea9f76a0cf301c336a0428718204b996245b505a70858da1ba9400f782c74f8ee8353a02b19a14

              • memory/1724-1-0x00000000005D0000-0x00000000006D0000-memory.dmp

                Filesize

                1024KB

              • memory/1724-2-0x0000000000220000-0x0000000000233000-memory.dmp

                Filesize

                76KB

              • memory/1724-3-0x0000000000400000-0x00000000004F6000-memory.dmp

                Filesize

                984KB

              • memory/1724-7-0x0000000000220000-0x0000000000233000-memory.dmp

                Filesize

                76KB

              • memory/1724-6-0x0000000000400000-0x00000000004F6000-memory.dmp

                Filesize

                984KB

              • memory/2528-10-0x0000000000590000-0x0000000000690000-memory.dmp

                Filesize

                1024KB

              • memory/2528-13-0x0000000000400000-0x00000000004F6000-memory.dmp

                Filesize

                984KB

              • memory/2528-17-0x0000000000590000-0x0000000000690000-memory.dmp

                Filesize

                1024KB

              • memory/2548-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

                Filesize

                4KB

              • memory/2548-11-0x0000000000080000-0x0000000000095000-memory.dmp

                Filesize

                84KB