Analysis

  • max time kernel
    141s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    20-06-2024 08:29

General

  • Target

    0f3b00054eb936e4064cccf117770df301e571f94d6a84ab2b9e7313c35008ec.exe

  • Size

    10.8MB

  • MD5

    8b1a03576a343231a6dea02fb795c4f2

  • SHA1

    268ea8a541dd86d02f34770ebdafc5ef7a4a348a

  • SHA256

    0f3b00054eb936e4064cccf117770df301e571f94d6a84ab2b9e7313c35008ec

  • SHA512

    e09e55f60a1db195acd3de91bc900a8516641f32e2c51b6e3341580c249def8e84daecaed393ff49698f26dba81c37fad8c44d67c2beb15eea34d5b083700403

  • SSDEEP

    3072:SCnHFEJgedCWkkqh6hQ7W7U+o/63uGRg/0JUxq6R/lGEk/Ib1Vbfhrq6JppppppZ:S46VdFq4of+oixRC+slxFOITbo6

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
  • 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0f3b00054eb936e4064cccf117770df301e571f94d6a84ab2b9e7313c35008ec.exe
    "C:\Users\Admin\AppData\Local\Temp\0f3b00054eb936e4064cccf117770df301e571f94d6a84ab2b9e7313c35008ec.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2524
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\onmtxwig\
      2⤵
        PID:2404
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eqchekjx.exe" C:\Windows\SysWOW64\onmtxwig\
        2⤵
          PID:1728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create onmtxwig binPath= "C:\Windows\SysWOW64\onmtxwig\eqchekjx.exe /d\"C:\Users\Admin\AppData\Local\Temp\0f3b00054eb936e4064cccf117770df301e571f94d6a84ab2b9e7313c35008ec.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2576
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description onmtxwig "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start onmtxwig
          2⤵
          • Launches sc.exe
          PID:2588
        • 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
          • Event Triggered Execution: Netsh Helper DLL
          PID:2688
      • C:\Windows\SysWOW64\onmtxwig\eqchekjx.exe
        C:\Windows\SysWOW64\onmtxwig\eqchekjx.exe /d"C:\Users\Admin\AppData\Local\Temp\0f3b00054eb936e4064cccf117770df301e571f94d6a84ab2b9e7313c35008ec.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2708
        • 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:2740

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.9MB

        MD5

        80d978fb46a84adac91fc74718702c97

        SHA1

        a0f5dfda2320763b9be23b3592a5199dceb31992

        SHA256

        c1a60af7f13e5c00d171bf0b79c62e3af15ba7f2e5046778173322d05911eb83

        SHA512

        92126484a4b8de5ff8e645ec2ecba85b5f26d34dfb4be8f8a0e826dc19640df741ce52801cc89cd4554f556dad2ae14cc3d5dfe12740b941da2187336c4ffdf9

      • memory/2524-15-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2524-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2524-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2524-1-0x00000000023F0000-0x00000000024F0000-memory.dmp

        Filesize

        1024KB

      • memory/2524-14-0x0000000000400000-0x00000000022EB000-memory.dmp

        Filesize

        30.9MB

      • memory/2708-13-0x0000000000400000-0x00000000022EB000-memory.dmp

        Filesize

        30.9MB

      • memory/2740-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2740-16-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2740-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2740-19-0x00000000019E0000-0x0000000001BEF000-memory.dmp

        Filesize

        2.1MB

      • memory/2740-26-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-23-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2740-22-0x00000000019E0000-0x0000000001BEF000-memory.dmp

        Filesize

        2.1MB

      • memory/2740-31-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2740-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-8-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2740-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-33-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-32-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-30-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-29-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-54-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

      • memory/2740-50-0x0000000005590000-0x000000000599B000-memory.dmp

        Filesize

        4.0MB

      • memory/2740-49-0x0000000000240000-0x0000000000245000-memory.dmp

        Filesize

        20KB

      • memory/2740-46-0x0000000000240000-0x0000000000245000-memory.dmp

        Filesize

        20KB

      • memory/2740-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2740-53-0x0000000005590000-0x000000000599B000-memory.dmp

        Filesize

        4.0MB