Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:35

General

  • Target

    755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe

  • Size

    203KB

  • MD5

    d88f7c78b3be6c96c33b80a8e1bb85de

  • SHA1

    ce07fb26b0ec69cdf563f98560aa4f7f298e6e8d

  • SHA256

    755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9

  • SHA512

    1c396a26da383d01ddc317bc4c565c5825b0e452bcf262ac849cd720acb6cb7abcc08e895041e59246dd7686e72424990728745716815a5879bce30769e3e898

  • SSDEEP

    3072:Ef3B/ALaZdXUNc8iirJiM21K7uSbrF068c0E0rBNWRDxlH+cmH:Ef32clVO598c0EHxQco

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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe
    "C:\Users\Admin\AppData\Local\Temp\755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2844
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sxfraekh\
      2⤵
        PID:2376
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kwebhuay.exe" C:\Windows\SysWOW64\sxfraekh\
        2⤵
          PID:2524
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sxfraekh binPath= "C:\Windows\SysWOW64\sxfraekh\kwebhuay.exe /d\"C:\Users\Admin\AppData\Local\Temp\755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3064
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sxfraekh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2632
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sxfraekh
          2⤵
          • Launches sc.exe
          PID:2864
        • 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:2608
      • C:\Windows\SysWOW64\sxfraekh\kwebhuay.exe
        C:\Windows\SysWOW64\sxfraekh\kwebhuay.exe /d"C:\Users\Admin\AppData\Local\Temp\755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2560
        • 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:2724

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.6MB

        MD5

        9fa38e3eeb18afc468098f572b4e77c7

        SHA1

        1895b2290e1e25c52f58ba483afdd38f8dd157f1

        SHA256

        61f0872bf858487f3e194cf4d605bf34435b6e80248d2e35bb23debc0add4ab2

        SHA512

        70a76f67fc39a6a19cb1bcf18465b01ff3661f6f833119a8074c61627b58865fd5da5e538b9591f846d8be9342283e4334b489009fddf4dcf256de796877754e

      • memory/2560-14-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2560-8-0x00000000005A0000-0x00000000006A0000-memory.dmp

        Filesize

        1024KB

      • memory/2560-13-0x00000000002E0000-0x00000000002F3000-memory.dmp

        Filesize

        76KB

      • memory/2724-36-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-58-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/2724-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2724-37-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-9-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2724-59-0x0000000000630000-0x0000000000637000-memory.dmp

        Filesize

        28KB

      • memory/2724-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2724-39-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2724-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2724-23-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2724-24-0x0000000001B00000-0x0000000001D0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2724-27-0x0000000001B00000-0x0000000001D0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2724-28-0x0000000000080000-0x0000000000086000-memory.dmp

        Filesize

        24KB

      • memory/2724-31-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-34-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-55-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/2724-35-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2724-44-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-38-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-40-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-41-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-42-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-43-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-45-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-46-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-47-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-49-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-50-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-51-0x0000000000620000-0x0000000000625000-memory.dmp

        Filesize

        20KB

      • memory/2724-48-0x00000000003D0000-0x00000000003E0000-memory.dmp

        Filesize

        64KB

      • memory/2724-54-0x0000000000620000-0x0000000000625000-memory.dmp

        Filesize

        20KB

      • memory/2844-3-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2844-1-0x0000000000230000-0x0000000000330000-memory.dmp

        Filesize

        1024KB

      • memory/2844-19-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2844-2-0x00000000003A0000-0x00000000003B3000-memory.dmp

        Filesize

        76KB