Analysis

  • max time kernel
    145s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:00

General

  • Target

    b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe

  • Size

    281KB

  • MD5

    45c66a2034297abfc6b5543dfbac04f2

  • SHA1

    21aea98d43c6d0aa86b8ee1777cc51cfae5a634f

  • SHA256

    b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9

  • SHA512

    a341910130e4a040f02405c553556851cddf6ac2396f7e0d38aa0c7a97894aa9dece5cb9a7ce323bb50f221cfbc27d29641a4ccdc4843af09f9f54a14e6c19ce

  • SSDEEP

    3072:auyDaJPZdL7cHeyf3XJ+rs+MlhxMMKe4uquK9RbPf65xfzW5ffXq3B1k48cV1JD2:auyWJDLwHzf8412Mebd36/fkfAB1pJd

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\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe
    "C:\Users\Admin\AppData\Local\Temp\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\luvdqkgf\
      2⤵
        PID:1964
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gpvgetl.exe" C:\Windows\SysWOW64\luvdqkgf\
        2⤵
          PID:2532
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create luvdqkgf binPath= "C:\Windows\SysWOW64\luvdqkgf\gpvgetl.exe /d\"C:\Users\Admin\AppData\Local\Temp\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2776
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description luvdqkgf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2868
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start luvdqkgf
          2⤵
          • Launches sc.exe
          PID:2664
        • 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:2240
      • C:\Windows\SysWOW64\luvdqkgf\gpvgetl.exe
        C:\Windows\SysWOW64\luvdqkgf\gpvgetl.exe /d"C:\Users\Admin\AppData\Local\Temp\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2604
        • 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:2616

      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\gpvgetl.exe
        Filesize

        11.1MB

        MD5

        2b5863f35787b6efc82d6513fa15458d

        SHA1

        633d5a1033edd89771ea5fdfc4947ecb2f8a74a9

        SHA256

        492a177fe22a4bf99dca5904f33e23e95656ce6f85375e3d279adc8d78be01a8

        SHA512

        3a6a6f238f83f1068a1d5550d079939b5b28ce3f474ac1b1b6765a0160f66b065d3e21eb1da94fe773cb4a81439b126ea7bef25bd4310f40c25ed71ca982fd82

      • memory/2364-1-0x0000000000910000-0x0000000000A10000-memory.dmp
        Filesize

        1024KB

      • memory/2364-4-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2364-8-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2364-9-0x0000000000910000-0x0000000000A10000-memory.dmp
        Filesize

        1024KB

      • memory/2364-10-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2364-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2604-18-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2604-11-0x0000000000980000-0x0000000000A80000-memory.dmp
        Filesize

        1024KB

      • memory/2604-12-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2616-45-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-47-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-13-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2616-20-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2616-21-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2616-22-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2616-24-0x00000000019A0000-0x0000000001BAF000-memory.dmp
        Filesize

        2.1MB

      • memory/2616-27-0x00000000019A0000-0x0000000001BAF000-memory.dmp
        Filesize

        2.1MB

      • memory/2616-28-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/2616-31-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2616-44-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-51-0x0000000000190000-0x0000000000195000-memory.dmp
        Filesize

        20KB

      • memory/2616-50-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-54-0x0000000000190000-0x0000000000195000-memory.dmp
        Filesize

        20KB

      • memory/2616-49-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-48-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-16-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/2616-46-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-43-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-42-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-41-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-40-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-55-0x0000000005970000-0x0000000005D7B000-memory.dmp
        Filesize

        4.0MB

      • memory/2616-39-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-38-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-37-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-36-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-35-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-34-0x0000000000180000-0x0000000000190000-memory.dmp
        Filesize

        64KB

      • memory/2616-58-0x0000000005970000-0x0000000005D7B000-memory.dmp
        Filesize

        4.0MB

      • memory/2616-59-0x00000000001A0000-0x00000000001A7000-memory.dmp
        Filesize

        28KB

      • memory/2616-63-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB