Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:33

General

  • Target

    26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924.exe

  • Size

    221KB

  • MD5

    bb0693796c43e3b4954321a201c124a7

  • SHA1

    5066abedd5fd1aebc207a056b1a2af7d7999d583

  • SHA256

    26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924

  • SHA512

    1e9a673951f26c1e081d3698145343056d81cd42c229feafd904f7cbc09096da8bb751de8263e0dd9e7482d162481ea7e723239d11a23f03547f1acf8d0d2b37

  • SSDEEP

    3072:EwJsPvd045hJkKkuW0MwA05h4TAQ2Jcx/MLm1nHvBQVy/eLWc8:gu45TkT0G2SLHvsae

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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924.exe
    "C:\Users\Admin\AppData\Local\Temp\26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2848
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mmgvnkk\
      2⤵
        PID:2992
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ziozxme.exe" C:\Windows\SysWOW64\mmgvnkk\
        2⤵
          PID:2556
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mmgvnkk binPath= "C:\Windows\SysWOW64\mmgvnkk\ziozxme.exe /d\"C:\Users\Admin\AppData\Local\Temp\26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2512
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mmgvnkk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2584
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mmgvnkk
          2⤵
          • Launches sc.exe
          PID:2256
        • 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:2736
      • C:\Windows\SysWOW64\mmgvnkk\ziozxme.exe
        C:\Windows\SysWOW64\mmgvnkk\ziozxme.exe /d"C:\Users\Admin\AppData\Local\Temp\26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2000
        • 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:2528

      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\ziozxme.exe
        Filesize

        13.8MB

        MD5

        5afd3e538dc977cdfabc2ddb5df81093

        SHA1

        305c4c91c95916679534ab7dabb89dba2491c14c

        SHA256

        97e0ef91d82920229581895230d95a3bb7714577e34c1080e06d315adf1547f7

        SHA512

        45442b84b174ebf6a5d2444e540ca568543e2ffd096929240ec7037b3508ea63cd8cf317e88f66b7a34dee1b18a29ad71ab1a56cd266ead9be613b802c62a4ce

      • memory/2000-9-0x0000000000A40000-0x0000000000B40000-memory.dmp
        Filesize

        1024KB

      • memory/2000-15-0x0000000000400000-0x00000000008E8000-memory.dmp
        Filesize

        4.9MB

      • memory/2000-11-0x0000000000400000-0x00000000008E8000-memory.dmp
        Filesize

        4.9MB

      • memory/2528-35-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-10-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2528-58-0x00000000006C0000-0x00000000006C7000-memory.dmp
        Filesize

        28KB

      • memory/2528-36-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2528-14-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2528-57-0x0000000005810000-0x0000000005C1B000-memory.dmp
        Filesize

        4.0MB

      • memory/2528-19-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2528-20-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2528-22-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2528-23-0x0000000001D00000-0x0000000001F0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2528-26-0x0000000001D00000-0x0000000001F0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2528-27-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/2528-30-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-33-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-34-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-53-0x0000000000500000-0x0000000000505000-memory.dmp
        Filesize

        20KB

      • memory/2528-37-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-54-0x0000000005810000-0x0000000005C1B000-memory.dmp
        Filesize

        4.0MB

      • memory/2528-38-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-39-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-40-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-41-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-42-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-43-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-44-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-45-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-46-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-47-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-48-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-49-0x0000000000330000-0x0000000000340000-memory.dmp
        Filesize

        64KB

      • memory/2528-50-0x0000000000500000-0x0000000000505000-memory.dmp
        Filesize

        20KB

      • memory/2848-6-0x0000000000400000-0x00000000008E8000-memory.dmp
        Filesize

        4.9MB

      • memory/2848-4-0x0000000000400000-0x00000000008E8000-memory.dmp
        Filesize

        4.9MB

      • memory/2848-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2848-1-0x0000000000D50000-0x0000000000E50000-memory.dmp
        Filesize

        1024KB