Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    17-06-2024 14:25

General

  • Target

    3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe

  • Size

    12.1MB

  • MD5

    702446058f451ba7dc24f6c803c2cde0

  • SHA1

    bf3a9ba6eba9b010f73b40e14af10665468726a0

  • SHA256

    3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5

  • SHA512

    d66c491708c746ed590d7394dd33b466bfec6e65268426af6996042335e9f256d6029f26434312bf401997d7bbba22688540d1a6066536c80894ce89b5d7ae43

  • SSDEEP

    3072:iaph+Lu/fY1fiDxf3AC0Rio+jbtocBO4Ie54I3swQ3swQ3swQ3swQ3swQ3swQ3s8:iG+Lu/fMaDNYizjbQ

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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe
    "C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2980
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pwpgbjxo\
      2⤵
        PID:2908
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hkdooxyy.exe" C:\Windows\SysWOW64\pwpgbjxo\
        2⤵
          PID:3056
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pwpgbjxo binPath= "C:\Windows\SysWOW64\pwpgbjxo\hkdooxyy.exe /d\"C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pwpgbjxo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pwpgbjxo
          2⤵
          • Launches sc.exe
          PID:2712
        • 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:2876
      • C:\Windows\SysWOW64\pwpgbjxo\hkdooxyy.exe
        C:\Windows\SysWOW64\pwpgbjxo\hkdooxyy.exe /d"C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2704
        • 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:2748

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        13.9MB

        MD5

        b9a110d7f02fb1c6ee0273235b6517ca

        SHA1

        7589327abfb50aff698d9cb38f56e04873ef1a2f

        SHA256

        25176b9205f73a17efa25264acb0e902b6b3b080463008c344e74781394f9da5

        SHA512

        625014f94e8de9633f536e22fc30ed245dd04c42f63d54b8fa352bf736174f94fb6bc8864d756604a19ebfc0f2475fd1b5087fefc8c4d93b003e8e15a7d31c9e

      • memory/2704-15-0x0000000000400000-0x0000000001BB5000-memory.dmp

        Filesize

        23.7MB

      • memory/2748-33-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-55-0x00000000001D0000-0x00000000001D7000-memory.dmp

        Filesize

        28KB

      • memory/2748-23-0x0000000001960000-0x0000000001B6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2748-34-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2748-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2748-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2748-54-0x0000000005450000-0x000000000585B000-memory.dmp

        Filesize

        4.0MB

      • memory/2748-51-0x0000000005450000-0x000000000585B000-memory.dmp

        Filesize

        4.0MB

      • memory/2748-16-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2748-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2748-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2748-24-0x0000000000150000-0x0000000000156000-memory.dmp

        Filesize

        24KB

      • memory/2748-27-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-20-0x0000000001960000-0x0000000001B6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2748-30-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-31-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-32-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-50-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2748-47-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2748-40-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-36-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-37-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-38-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-39-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-35-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-41-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-42-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-43-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-44-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-45-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2748-46-0x00000000001B0000-0x00000000001C0000-memory.dmp

        Filesize

        64KB

      • memory/2980-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2980-1-0x0000000001C30000-0x0000000001D30000-memory.dmp

        Filesize

        1024KB

      • memory/2980-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/2980-8-0x0000000000400000-0x0000000001BB5000-memory.dmp

        Filesize

        23.7MB

      • memory/2980-9-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/2980-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB