Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 14:06

General

  • Target

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe

  • Size

    170KB

  • MD5

    f5fd4237e550503a8eab51ae35f147b6

  • SHA1

    869d44d58fb734b3692500dae1f42f0d6e3b3434

  • SHA256

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd

  • SHA512

    32327ca44e09d46ba8e656124f7480979b3eeb3769a94259d536a5223b2c532bd21654d8b4551d26265903f5c2be87a8da73d4571eee6fd9bfc887ea9e88350f

  • SSDEEP

    1536:Js5KSNeteSXSI4nZ7OyP8p7+C1xIhQ6M3dfUMJn325pDedDT50ZXXKVXRKX:e5ScSHCO1p7hiO4AI1edHK56lR

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\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe
    "C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2236
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kvizvmwf\
      2⤵
        PID:2204
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe" C:\Windows\SysWOW64\kvizvmwf\
        2⤵
          PID:2820
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kvizvmwf binPath= "C:\Windows\SysWOW64\kvizvmwf\knkduwqg.exe /d\"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2652
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kvizvmwf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2940
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kvizvmwf
          2⤵
          • Launches sc.exe
          PID:3040
        • 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:2476
      • C:\Windows\SysWOW64\kvizvmwf\knkduwqg.exe
        C:\Windows\SysWOW64\kvizvmwf\knkduwqg.exe /d"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2528
        • 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:2512

      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\knkduwqg.exe
        Filesize

        12.4MB

        MD5

        e63e2159b3653a41fdd04d6a4a950d8a

        SHA1

        f9abba680dd54254dc9b999bffaebe01d9290f82

        SHA256

        382bf2661f7cc45294d1f40f06fe32ad3b7cc1717c4509e3366fdbf8bfe73618

        SHA512

        b24be85fc2d42249e2125aa6048072696ab82ca5e89f3db48b955f58b754b158b0a6d065a36de29a4df2edbaea02b515208ae3afc51492a58d1e77030f347514

      • memory/2236-1-0x0000000000580000-0x0000000000680000-memory.dmp
        Filesize

        1024KB

      • memory/2236-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2236-3-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB

      • memory/2236-6-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB

      • memory/2236-7-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2512-35-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-38-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2512-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2512-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2512-58-0x00000000002C0000-0x00000000002C7000-memory.dmp
        Filesize

        28KB

      • memory/2512-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2512-21-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2512-23-0x0000000001870000-0x0000000001A7F000-memory.dmp
        Filesize

        2.1MB

      • memory/2512-26-0x0000000001870000-0x0000000001A7F000-memory.dmp
        Filesize

        2.1MB

      • memory/2512-27-0x00000000000B0000-0x00000000000B6000-memory.dmp
        Filesize

        24KB

      • memory/2512-30-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-33-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-34-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-57-0x00000000053B0000-0x00000000057BB000-memory.dmp
        Filesize

        4.0MB

      • memory/2512-36-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-37-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2512-39-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-40-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-41-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-42-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-43-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-44-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-45-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-46-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-47-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-48-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-49-0x00000000000C0000-0x00000000000D0000-memory.dmp
        Filesize

        64KB

      • memory/2512-50-0x0000000000250000-0x0000000000255000-memory.dmp
        Filesize

        20KB

      • memory/2512-53-0x0000000000250000-0x0000000000255000-memory.dmp
        Filesize

        20KB

      • memory/2512-54-0x00000000053B0000-0x00000000057BB000-memory.dmp
        Filesize

        4.0MB

      • memory/2528-10-0x0000000000550000-0x0000000000650000-memory.dmp
        Filesize

        1024KB

      • memory/2528-18-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB

      • memory/2528-12-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB