Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    22-05-2024 09:24

General

  • Target

    914f74e19d0a6b1501f2942ddd8eb78ed51ffd25da203c779ee05591dbb9b0b1.exe

  • Size

    11.5MB

  • MD5

    342973c7facd1fbbfbfdae4e873dc4a0

  • SHA1

    782bdc0091de61f185e018b7b7756b95e0233b91

  • SHA256

    914f74e19d0a6b1501f2942ddd8eb78ed51ffd25da203c779ee05591dbb9b0b1

  • SHA512

    a7348615c23e18a48decbfda93e9a7b8862abf680bafdfff8daf558ae64567b431ee1cac4f05a044e9703a513a77e8dff9ef42f0d135efe7d03cb2aaa96cea15

  • SSDEEP

    6144:5S8dp/oVs7UHb+KCmkxdUtCEUiiqpL3ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZv:IgAVwUHbNKdZPqN

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
  • 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\914f74e19d0a6b1501f2942ddd8eb78ed51ffd25da203c779ee05591dbb9b0b1.exe
    "C:\Users\Admin\AppData\Local\Temp\914f74e19d0a6b1501f2942ddd8eb78ed51ffd25da203c779ee05591dbb9b0b1.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\colrlqut\
      2⤵
        PID:2396
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pspizbvl.exe" C:\Windows\SysWOW64\colrlqut\
        2⤵
          PID:1444
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create colrlqut binPath= "C:\Windows\SysWOW64\colrlqut\pspizbvl.exe /d\"C:\Users\Admin\AppData\Local\Temp\914f74e19d0a6b1501f2942ddd8eb78ed51ffd25da203c779ee05591dbb9b0b1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description colrlqut "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2652
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start colrlqut
          2⤵
          • Launches sc.exe
          PID:2640
        • 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:2468
      • C:\Windows\SysWOW64\colrlqut\pspizbvl.exe
        C:\Windows\SysWOW64\colrlqut\pspizbvl.exe /d"C:\Users\Admin\AppData\Local\Temp\914f74e19d0a6b1501f2942ddd8eb78ed51ffd25da203c779ee05591dbb9b0b1.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2584
        • 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:2760

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\pspizbvl.exe

        Filesize

        13.2MB

        MD5

        ad867838e7c8a747a2cf466cce1a81a9

        SHA1

        cd088f1d7e4dd44d5b64839aa899c480b1319d96

        SHA256

        7083b99798beac7348b25fe4799c85af38a8e9a9daf8cb9f154b6de242399427

        SHA512

        0c5fbfb3f6998d5ac0460edfb71ab6dcc04c9bd71602b7cd1391c0ad3f9fa8159515daa7cfcc77244b73d929028c686b20ff587b0f3eb88da7f49ac527b2da59

      • memory/1228-15-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1228-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1228-1-0x0000000002520000-0x0000000002620000-memory.dmp

        Filesize

        1024KB

      • memory/1228-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1228-14-0x0000000000400000-0x000000000246F000-memory.dmp

        Filesize

        32.4MB

      • memory/2584-13-0x0000000000400000-0x000000000246F000-memory.dmp

        Filesize

        32.4MB

      • memory/2760-49-0x0000000000280000-0x0000000000285000-memory.dmp

        Filesize

        20KB

      • memory/2760-43-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-11-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2760-16-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2760-17-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2760-19-0x0000000001940000-0x0000000001B4F000-memory.dmp

        Filesize

        2.1MB

      • memory/2760-22-0x0000000001940000-0x0000000001B4F000-memory.dmp

        Filesize

        2.1MB

      • memory/2760-23-0x0000000000120000-0x0000000000126000-memory.dmp

        Filesize

        24KB

      • memory/2760-34-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-53-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2760-50-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2760-8-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2760-46-0x0000000000280000-0x0000000000285000-memory.dmp

        Filesize

        20KB

      • memory/2760-45-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-44-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2760-42-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-41-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-40-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-39-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-38-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-37-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-36-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-35-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-33-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-32-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-31-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-30-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-29-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-26-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/2760-54-0x00000000002D0000-0x00000000002D7000-memory.dmp

        Filesize

        28KB