Analysis

  • max time kernel
    140s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:32

General

  • Target

    e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe

  • Size

    307KB

  • MD5

    f4eb02f3a2587ba66f1036cae85e4770

  • SHA1

    e8ed42963f946e33ec99af067eeabf0412436b62

  • SHA256

    e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8

  • SHA512

    6cfc6f6a07c5e36d678f9999ca9377549843f81cef9f23e3819c0dcde7d8f68668469c65c9690a6e8139c216f2b79058dc5255f5f8efa1def6bd7be2919e6719

  • SSDEEP

    3072:TTgg3xOPn/SpLwMMrcDPXDzGkP2NakC5p+WrjxxMu63jXdo:gOOf/mLwMMrcDPXDzdvN+WvxajX

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\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe
    "C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lmhksenj\
      2⤵
        PID:2880
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vekvtia.exe" C:\Windows\SysWOW64\lmhksenj\
        2⤵
          PID:2224
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lmhksenj binPath= "C:\Windows\SysWOW64\lmhksenj\vekvtia.exe /d\"C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lmhksenj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2664
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lmhksenj
          2⤵
          • Launches sc.exe
          PID:2612
        • 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:2812
      • C:\Windows\SysWOW64\lmhksenj\vekvtia.exe
        C:\Windows\SysWOW64\lmhksenj\vekvtia.exe /d"C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2460
        • 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:2716

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        10.8MB

        MD5

        378ee565d81d187f4e97d29ac762b190

        SHA1

        3b7955e29c00889ac5eea96122ee277f849a568f

        SHA256

        7e3ab25f18c89e1d9e52652131bd212a2de7ac5224cc8bfe1746e0608215a102

        SHA512

        38e0a50b7c3cef640f568e69cbe39000dda2d512015eea1f3a5041006d86477fdc83c60197576af485ac08c3a347351aa6e1a5f3f4c2aa5a6a82934ec426383b

      • memory/2188-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2188-4-0x0000000000400000-0x0000000002AC2000-memory.dmp
        Filesize

        38.8MB

      • memory/2188-7-0x0000000000400000-0x0000000002AC2000-memory.dmp
        Filesize

        38.8MB

      • memory/2188-10-0x0000000002F10000-0x0000000003010000-memory.dmp
        Filesize

        1024KB

      • memory/2188-1-0x0000000002F10000-0x0000000003010000-memory.dmp
        Filesize

        1024KB

      • memory/2460-18-0x0000000000400000-0x0000000002AC2000-memory.dmp
        Filesize

        38.8MB

      • memory/2460-9-0x00000000002B0000-0x00000000003B0000-memory.dmp
        Filesize

        1024KB

      • memory/2460-13-0x0000000000400000-0x0000000002AC2000-memory.dmp
        Filesize

        38.8MB

      • memory/2716-41-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-42-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2716-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2716-21-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2716-23-0x0000000001A50000-0x0000000001C5F000-memory.dmp
        Filesize

        2.1MB

      • memory/2716-26-0x0000000001A50000-0x0000000001C5F000-memory.dmp
        Filesize

        2.1MB

      • memory/2716-27-0x0000000000270000-0x0000000000276000-memory.dmp
        Filesize

        24KB

      • memory/2716-30-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-33-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-37-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2716-43-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-44-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-45-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2716-47-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-46-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-50-0x00000000003D0000-0x00000000003D5000-memory.dmp
        Filesize

        20KB

      • memory/2716-49-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-48-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-40-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-39-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-38-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-36-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-35-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-34-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2716-53-0x00000000003D0000-0x00000000003D5000-memory.dmp
        Filesize

        20KB

      • memory/2716-54-0x00000000059F0000-0x0000000005DFB000-memory.dmp
        Filesize

        4.0MB

      • memory/2716-57-0x00000000059F0000-0x0000000005DFB000-memory.dmp
        Filesize

        4.0MB

      • memory/2716-58-0x0000000000420000-0x0000000000427000-memory.dmp
        Filesize

        28KB

      • memory/2716-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB