Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    10-05-2024 05:20

General

  • Target

    56c810d00957ea3eb8a5bc59ee7d5e04dde7c323131db0afff103c9830ae3bfd.exe

  • Size

    11.3MB

  • MD5

    aaac609f177376eeb5f5ce8c5320e85e

  • SHA1

    761a2bb1419572c47bf4d73a3f62b6b99059c043

  • SHA256

    56c810d00957ea3eb8a5bc59ee7d5e04dde7c323131db0afff103c9830ae3bfd

  • SHA512

    e15de40efac541439fce9e517b8377110c85c03df126f3b3e188eafbe9984acebc6dc9bdac9870870b89a43546e7ea99a9ed7af9c7ff21fadc8759cf4d8063ee

  • SSDEEP

    6144:qILpF81vOj1GcYGW5DSTLQaYpR/MUDoS:j84GcYGiDSLsoS

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
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\56c810d00957ea3eb8a5bc59ee7d5e04dde7c323131db0afff103c9830ae3bfd.exe
    "C:\Users\Admin\AppData\Local\Temp\56c810d00957ea3eb8a5bc59ee7d5e04dde7c323131db0afff103c9830ae3bfd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1804
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vdedcgip\
      2⤵
        PID:2268
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bndqedvz.exe" C:\Windows\SysWOW64\vdedcgip\
        2⤵
          PID:2084
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vdedcgip binPath= "C:\Windows\SysWOW64\vdedcgip\bndqedvz.exe /d\"C:\Users\Admin\AppData\Local\Temp\56c810d00957ea3eb8a5bc59ee7d5e04dde7c323131db0afff103c9830ae3bfd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vdedcgip "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vdedcgip
          2⤵
          • Launches sc.exe
          PID:2476
        • 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:2596
      • C:\Windows\SysWOW64\vdedcgip\bndqedvz.exe
        C:\Windows\SysWOW64\vdedcgip\bndqedvz.exe /d"C:\Users\Admin\AppData\Local\Temp\56c810d00957ea3eb8a5bc59ee7d5e04dde7c323131db0afff103c9830ae3bfd.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2628
        • 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:2580

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Execution

      System Services

      1
      T1569

      Service Execution

      1
      T1569.002

      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\bndqedvz.exe
        Filesize

        14.8MB

        MD5

        09d251290984dc13abe1fa8e281c1eaa

        SHA1

        649b798f95cbcba6b6b4b5ee45f38a3d92d6da65

        SHA256

        eb8ffb17fac7e3bf49c6ccb7c3f3e7ad3538c6306277ae09dfd9c1fcc5b42b8e

        SHA512

        a05f9bd40a0ebe20aaf0b662a5e7e6709e565be05f39d0ff368c211eed19a1ac79a0c1043cba37883ebfc29e0f7ab92e7adddd8d8fd3f013e5afcd9622a30c1f

      • memory/1804-10-0x0000000000400000-0x00000000007F2000-memory.dmp
        Filesize

        3.9MB

      • memory/1804-2-0x0000000000930000-0x0000000000A30000-memory.dmp
        Filesize

        1024KB

      • memory/1804-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1804-4-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/1804-0-0x0000000000400000-0x00000000007F2000-memory.dmp
        Filesize

        3.9MB

      • memory/1804-12-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/1804-11-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2580-54-0x0000000005590000-0x000000000599B000-memory.dmp
        Filesize

        4.0MB

      • memory/2580-47-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2580-14-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2580-26-0x00000000019F0000-0x0000000001BFF000-memory.dmp
        Filesize

        2.1MB

      • memory/2580-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2580-21-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2580-23-0x00000000019F0000-0x0000000001BFF000-memory.dmp
        Filesize

        2.1MB

      • memory/2580-58-0x0000000000280000-0x0000000000287000-memory.dmp
        Filesize

        28KB

      • memory/2580-30-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-39-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-57-0x0000000005590000-0x000000000599B000-memory.dmp
        Filesize

        4.0MB

      • memory/2580-27-0x0000000000160000-0x0000000000166000-memory.dmp
        Filesize

        24KB

      • memory/2580-53-0x0000000000230000-0x0000000000235000-memory.dmp
        Filesize

        20KB

      • memory/2580-50-0x0000000000230000-0x0000000000235000-memory.dmp
        Filesize

        20KB

      • memory/2580-49-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-48-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2580-46-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-45-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-44-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-43-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-42-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-41-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-40-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-38-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-37-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-36-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-35-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-34-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2580-33-0x0000000000220000-0x0000000000230000-memory.dmp
        Filesize

        64KB

      • memory/2628-8-0x0000000000400000-0x00000000007F2000-memory.dmp
        Filesize

        3.9MB

      • memory/2628-20-0x0000000000400000-0x00000000007F2000-memory.dmp
        Filesize

        3.9MB