Analysis

  • max time kernel
    186s
  • max time network
    204s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:19

General

  • Target

    3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe

  • Size

    203KB

  • MD5

    e80ed6ccb333b7fc33ffc98bca43b57d

  • SHA1

    170281a608fe94eee06a9f45466f6a47bd2272e3

  • SHA256

    3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3

  • SHA512

    3209c004cebb1e2f544f7d8457175a62da8a225bc08bcbb051c240eddc610ca8e1ddfe7f6d758d2e09517030afad689b6805fc2b8b801a1f182c04369191a30d

  • SSDEEP

    3072:eafjdfYraZJXENc8uCXJiXK1K2LEpzUCV+PaIh9bwdANblLNBNKRrxbU+cmH:eafjqQ15OCyLLkCVkxbDco

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.

  • 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\3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe
    "C:\Users\Admin\AppData\Local\Temp\3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\egwahxud\
      2⤵
        PID:2804
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kawlgywe.exe" C:\Windows\SysWOW64\egwahxud\
        2⤵
          PID:1660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create egwahxud binPath= "C:\Windows\SysWOW64\egwahxud\kawlgywe.exe /d\"C:\Users\Admin\AppData\Local\Temp\3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2936
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description egwahxud "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2384
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start egwahxud
          2⤵
          • Launches sc.exe
          PID:2392
        • 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:2708
      • C:\Windows\SysWOW64\egwahxud\kawlgywe.exe
        C:\Windows\SysWOW64\egwahxud\kawlgywe.exe /d"C:\Users\Admin\AppData\Local\Temp\3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2736
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2780

      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

      1
      T1562

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      1
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        10.8MB

        MD5

        46cbd24adeb7165df3f07c63ff161ba2

        SHA1

        ce6a216075ec2559f473d65340b866be0cb6acd3

        SHA256

        fef02ed6c7f9862e1413cdae53390de5659917fdc12ad0dffbcd34af6ca28122

        SHA512

        a58b66c3e96e66d452925452a088af15c426031b97c13d3be8181233b298af17fc5553fccec8c2a78c7f5a563879a5b02f928746e60b6de394b0fafd8156afd9

      • memory/2736-10-0x0000000000540000-0x0000000000640000-memory.dmp
        Filesize

        1024KB

      • memory/2736-16-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2736-11-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2780-34-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-58-0x0000000005980000-0x0000000005D8B000-memory.dmp
        Filesize

        4.0MB

      • memory/2780-59-0x00000000006C0000-0x00000000006C7000-memory.dmp
        Filesize

        28KB

      • memory/2780-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2780-15-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-12-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-37-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-18-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-36-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-20-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-21-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-23-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-24-0x0000000001860000-0x0000000001A6F000-memory.dmp
        Filesize

        2.1MB

      • memory/2780-27-0x0000000001860000-0x0000000001A6F000-memory.dmp
        Filesize

        2.1MB

      • memory/2780-28-0x0000000000270000-0x0000000000276000-memory.dmp
        Filesize

        24KB

      • memory/2780-31-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-55-0x0000000005980000-0x0000000005D8B000-memory.dmp
        Filesize

        4.0MB

      • memory/2780-35-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-19-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2780-54-0x00000000006B0000-0x00000000006B5000-memory.dmp
        Filesize

        20KB

      • memory/2780-43-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-39-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-40-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-42-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-41-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-38-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-44-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-45-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-46-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-47-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-48-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-49-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-50-0x0000000000280000-0x0000000000290000-memory.dmp
        Filesize

        64KB

      • memory/2780-51-0x00000000006B0000-0x00000000006B5000-memory.dmp
        Filesize

        20KB

      • memory/3012-7-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/3012-1-0x00000000002B0000-0x00000000003B0000-memory.dmp
        Filesize

        1024KB

      • memory/3012-4-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/3012-3-0x00000000001B0000-0x00000000001C3000-memory.dmp
        Filesize

        76KB