Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    07-05-2024 04:20

General

  • Target

    c49861692de468b53502757aeecebd9e9c4f1be1e4811951a11ad690e2a89e5f.exe

  • Size

    11.3MB

  • MD5

    1c497241aaa3f1d435dd89c1d93e9047

  • SHA1

    3f9191171b51378e6a8dc316937254e1113eabae

  • SHA256

    c49861692de468b53502757aeecebd9e9c4f1be1e4811951a11ad690e2a89e5f

  • SHA512

    fae106f6b4770265d048576d056eea2c8df780b3388d5cc379f207a926296b0229a4dfe9d370e3573aa2a8237b351d460d01eaa5cc2d2bfd9eae3ef37a439f96

  • SSDEEP

    3072:9wMyTh7hc3pJIMe/uc0El2ah/CKplmgxg40nT8gILkJfIv/4GEgaPoutktwtwtwB:9wMyTlhc7P8uUIah6Kpl7tp/agMoS

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) 2 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
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c49861692de468b53502757aeecebd9e9c4f1be1e4811951a11ad690e2a89e5f.exe
    "C:\Users\Admin\AppData\Local\Temp\c49861692de468b53502757aeecebd9e9c4f1be1e4811951a11ad690e2a89e5f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gpjzssza\
      2⤵
        PID:2216
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe" C:\Windows\SysWOW64\gpjzssza\
        2⤵
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gpjzssza binPath= "C:\Windows\SysWOW64\gpjzssza\ipwzocvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\c49861692de468b53502757aeecebd9e9c4f1be1e4811951a11ad690e2a89e5f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2496
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gpjzssza "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2228
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gpjzssza
          2⤵
          • Launches sc.exe
          PID:2392
        • 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:2436
      • C:\Windows\SysWOW64\gpjzssza\ipwzocvf.exe
        C:\Windows\SysWOW64\gpjzssza\ipwzocvf.exe /d"C:\Users\Admin\AppData\Local\Temp\c49861692de468b53502757aeecebd9e9c4f1be1e4811951a11ad690e2a89e5f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2124
        • 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:2364

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        593bd4afd08347c9a50ade85ba2a7067

        SHA1

        e58ff1a9fce85e0cd206d097ae98a55e9ae4eba3

        SHA256

        cb1aec901e95d61169a9a526786da7b845e56fc9376880f3a27fbe3dabe43916

        SHA512

        9da19542f17d01e851f406291fe30b956046e35f251adf6b1665859ab74b106bc9f1c14f90b5f35102ac0b6cf8dcca4dda030b2a3acd0c47aef642067a8528a7

      • memory/2124-8-0x0000000000400000-0x0000000000804000-memory.dmp

        Filesize

        4.0MB

      • memory/2124-17-0x0000000000400000-0x0000000000804000-memory.dmp

        Filesize

        4.0MB

      • memory/2240-18-0x0000000000400000-0x0000000000804000-memory.dmp

        Filesize

        4.0MB

      • memory/2240-2-0x0000000000900000-0x0000000000A00000-memory.dmp

        Filesize

        1024KB

      • memory/2240-4-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2240-3-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2240-0-0x0000000000400000-0x0000000000804000-memory.dmp

        Filesize

        4.0MB

      • memory/2240-19-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2364-47-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2364-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2364-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2364-23-0x0000000001890000-0x0000000001A9F000-memory.dmp

        Filesize

        2.1MB

      • memory/2364-55-0x0000000005390000-0x000000000579B000-memory.dmp

        Filesize

        4.0MB

      • memory/2364-57-0x0000000005390000-0x000000000579B000-memory.dmp

        Filesize

        4.0MB

      • memory/2364-53-0x0000000000180000-0x0000000000185000-memory.dmp

        Filesize

        20KB

      • memory/2364-50-0x0000000000180000-0x0000000000185000-memory.dmp

        Filesize

        20KB

      • memory/2364-48-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2364-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2364-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-30-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-27-0x00000000000B0000-0x00000000000B6000-memory.dmp

        Filesize

        24KB

      • memory/2364-26-0x0000000001890000-0x0000000001A9F000-memory.dmp

        Filesize

        2.1MB

      • memory/2364-58-0x0000000000190000-0x0000000000197000-memory.dmp

        Filesize

        28KB

      • memory/2364-49-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB

      • memory/2364-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

        Filesize

        64KB