Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    18-04-2024 19:32

General

  • Target

    1d4e2d006bff0bb6eb9cb7cf757b4003fd87386da931f844fede941868849749.exe

  • Size

    267KB

  • MD5

    6736700e3dfb47ac9beba3c2eff9e7ca

  • SHA1

    00d5f83f5bfd1bf889a0991882457db790c95c17

  • SHA256

    1d4e2d006bff0bb6eb9cb7cf757b4003fd87386da931f844fede941868849749

  • SHA512

    ffd04ada229530484d250ecba1c51b5175ac62dbdc872045c4b3426367c1545ee0eff9a90bba617d75f034d6e452e4a56ea753f7b0810b9268fefb41f55bdc5a

  • SSDEEP

    3072:7QOPm6aPQb9A3Hd1fWSol++S8/5QvstAj9gQ7HUjzNR4hT/ydzUtmMG/:Lm6aoiXd13olaesstABE4hCwtY/

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 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).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1d4e2d006bff0bb6eb9cb7cf757b4003fd87386da931f844fede941868849749.exe
    "C:\Users\Admin\AppData\Local\Temp\1d4e2d006bff0bb6eb9cb7cf757b4003fd87386da931f844fede941868849749.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vocicdqj\
      2⤵
        PID:2188
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dmsdbqi.exe" C:\Windows\SysWOW64\vocicdqj\
        2⤵
          PID:2868
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vocicdqj binPath= "C:\Windows\SysWOW64\vocicdqj\dmsdbqi.exe /d\"C:\Users\Admin\AppData\Local\Temp\1d4e2d006bff0bb6eb9cb7cf757b4003fd87386da931f844fede941868849749.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2776
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vocicdqj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2900
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vocicdqj
          2⤵
          • Launches sc.exe
          PID:3024
        • 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:2852
      • C:\Windows\SysWOW64\vocicdqj\dmsdbqi.exe
        C:\Windows\SysWOW64\vocicdqj\dmsdbqi.exe /d"C:\Users\Admin\AppData\Local\Temp\1d4e2d006bff0bb6eb9cb7cf757b4003fd87386da931f844fede941868849749.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2948
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2596

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\dmsdbqi.exe
        Filesize

        14.6MB

        MD5

        325da81ce8296df5e6a02657724f5642

        SHA1

        6ca7749dee8f9cb1b369fdf5375a152d3f18c0da

        SHA256

        2ee263503c31df2d37477bb766b56d636ea3306e63e23a3f75eb5f09ed1a4529

        SHA512

        c3f9086d5e2fafe182d32c906a6bd7e892b03d8fabc395340ace57d739221c3e312881739d4cb97e3ddd2d1e70941e1affdb8a46f2f7584151090338d0704854

      • memory/1640-1-0x00000000005F0000-0x00000000006F0000-memory.dmp
        Filesize

        1024KB

      • memory/1640-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1640-3-0x0000000000400000-0x0000000000547000-memory.dmp
        Filesize

        1.3MB

      • memory/1640-7-0x0000000000400000-0x0000000000547000-memory.dmp
        Filesize

        1.3MB

      • memory/1640-8-0x00000000005F0000-0x00000000006F0000-memory.dmp
        Filesize

        1024KB

      • memory/1640-9-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2596-35-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-47-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2596-13-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2596-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2596-16-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2596-21-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2596-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2596-22-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2596-24-0x0000000001960000-0x0000000001B6F000-memory.dmp
        Filesize

        2.1MB

      • memory/2596-27-0x0000000001960000-0x0000000001B6F000-memory.dmp
        Filesize

        2.1MB

      • memory/2596-28-0x0000000000360000-0x0000000000366000-memory.dmp
        Filesize

        24KB

      • memory/2596-31-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-59-0x0000000000530000-0x0000000000537000-memory.dmp
        Filesize

        28KB

      • memory/2596-34-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-38-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-42-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-58-0x0000000005950000-0x0000000005D5B000-memory.dmp
        Filesize

        4.0MB

      • memory/2596-48-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-46-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-45-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-51-0x0000000000520000-0x0000000000525000-memory.dmp
        Filesize

        20KB

      • memory/2596-54-0x0000000000520000-0x0000000000525000-memory.dmp
        Filesize

        20KB

      • memory/2596-55-0x0000000005950000-0x0000000005D5B000-memory.dmp
        Filesize

        4.0MB

      • memory/2596-50-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-49-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-44-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-43-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-41-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-40-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-39-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-37-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2596-36-0x00000000004B0000-0x00000000004C0000-memory.dmp
        Filesize

        64KB

      • memory/2948-12-0x0000000000400000-0x0000000000547000-memory.dmp
        Filesize

        1.3MB

      • memory/2948-11-0x0000000000990000-0x0000000000A90000-memory.dmp
        Filesize

        1024KB

      • memory/2948-17-0x0000000000400000-0x0000000000547000-memory.dmp
        Filesize

        1.3MB