Analysis

  • max time kernel
    142s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:32

General

  • Target

    ed8e31c2fccca230c75e8246d3e31ee548af0139a1e8dfb4038fa256d362c3d3.exe

  • Size

    244KB

  • MD5

    cd2eb2cfc4675f413db94ff743d195d7

  • SHA1

    bd7b6b5a94387779d88bbfe1e32fa13666be6e9b

  • SHA256

    ed8e31c2fccca230c75e8246d3e31ee548af0139a1e8dfb4038fa256d362c3d3

  • SHA512

    5c8a1460d71f6db9fede021d2b8521877f85da7ec1b101815577a19a09dfe374526c74eb5f62c38cf56a10d54c4dd2362de07388c76170a6fa7618be9ef8f782

  • SSDEEP

    3072:C7lSzmWVD0wRzLKqBKWBgOlaR+f+TmAC+3IxY1b+wiOMOl3eAwXsUvfXVkwIwC8Z:+4x0YLFoegOlaR+WCFi1bviKeXfmh8

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\ed8e31c2fccca230c75e8246d3e31ee548af0139a1e8dfb4038fa256d362c3d3.exe
    "C:\Users\Admin\AppData\Local\Temp\ed8e31c2fccca230c75e8246d3e31ee548af0139a1e8dfb4038fa256d362c3d3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bipeshey\
      2⤵
        PID:2808
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\szgjymfp.exe" C:\Windows\SysWOW64\bipeshey\
        2⤵
          PID:3068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bipeshey binPath= "C:\Windows\SysWOW64\bipeshey\szgjymfp.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed8e31c2fccca230c75e8246d3e31ee548af0139a1e8dfb4038fa256d362c3d3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bipeshey "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bipeshey
          2⤵
          • Launches sc.exe
          PID:2116
        • 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:2528
      • C:\Windows\SysWOW64\bipeshey\szgjymfp.exe
        C:\Windows\SysWOW64\bipeshey\szgjymfp.exe /d"C:\Users\Admin\AppData\Local\Temp\ed8e31c2fccca230c75e8246d3e31ee548af0139a1e8dfb4038fa256d362c3d3.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2600
        • 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:2456

      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\szgjymfp.exe
        Filesize

        13.5MB

        MD5

        134e12978a2c992f6d00c1d64650d317

        SHA1

        8240a534f0423dbecac244f98048088bd61c76f2

        SHA256

        bfdd5bf87b536c4b76b9cdad82eda264bef6187a5f1cee217bd7258b247ec62d

        SHA512

        fd51e2b12967993db2208875b296ed9caf0e890321916240508c93a5ad1af23b4c83f69120cb47a810c43b9c60c381c61ae7344bf5564db90c2d65730bd4f746

      • memory/2212-3-0x00000000001B0000-0x00000000001C3000-memory.dmp
        Filesize

        76KB

      • memory/2212-1-0x0000000000290000-0x0000000000390000-memory.dmp
        Filesize

        1024KB

      • memory/2212-4-0x0000000000400000-0x00000000007C6000-memory.dmp
        Filesize

        3.8MB

      • memory/2212-7-0x0000000000400000-0x00000000007C6000-memory.dmp
        Filesize

        3.8MB

      • memory/2456-35-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-37-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2456-57-0x00000000001B0000-0x00000000001B7000-memory.dmp
        Filesize

        28KB

      • memory/2456-12-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2456-18-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2456-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2456-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2456-22-0x0000000001A00000-0x0000000001C0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2456-25-0x0000000001A00000-0x0000000001C0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2456-26-0x0000000000120000-0x0000000000126000-memory.dmp
        Filesize

        24KB

      • memory/2456-29-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-32-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-34-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-33-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-9-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2456-36-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2456-38-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-40-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-39-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-41-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-43-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-42-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-44-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-45-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-46-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-47-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-49-0x00000000001A0000-0x00000000001A5000-memory.dmp
        Filesize

        20KB

      • memory/2456-48-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2456-52-0x00000000001A0000-0x00000000001A5000-memory.dmp
        Filesize

        20KB

      • memory/2456-53-0x0000000005890000-0x0000000005C9B000-memory.dmp
        Filesize

        4.0MB

      • memory/2456-56-0x0000000005890000-0x0000000005C9B000-memory.dmp
        Filesize

        4.0MB

      • memory/2600-15-0x0000000000400000-0x00000000007C6000-memory.dmp
        Filesize

        3.8MB

      • memory/2600-14-0x0000000000970000-0x0000000000A70000-memory.dmp
        Filesize

        1024KB