Analysis

  • max time kernel
    146s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-09-2024 16:40

General

  • Target

    f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe

  • Size

    11.7MB

  • MD5

    b8332866db45bf85ed517c599eaafe54

  • SHA1

    f86726a6a85f613e15066a7ad77cef942e3c9d28

  • SHA256

    f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71

  • SHA512

    b95ac93c7487fada804562e98f8e5db4902ab3195236c71cfa171732071d4601ce479b6eed519f61a0724a47d6cda7f9d397285c265b2c9bfb7d143ba8ef1425

  • SSDEEP

    3072:qoiqjV0QCeV75zMwb2EfDXTBrt0c5f+Z7ApWt+0krytpObPUfAGM4H1M4CjiJNx4:qoiqjWHeV9zthDjBrmA+VkDbSAgQiTx

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 6 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe
    "C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3024
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\idmdqfkz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2440
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\htauzfsa.exe" C:\Windows\SysWOW64\idmdqfkz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4960
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create idmdqfkz binPath= "C:\Windows\SysWOW64\idmdqfkz\htauzfsa.exe /d\"C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3696
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description idmdqfkz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4488
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start idmdqfkz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:680
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:4524
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3024 -s 804
      2⤵
      • Program crash
      PID:4904
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3024 -s 596
      2⤵
      • Program crash
      PID:4888
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3024 -s 1220
      2⤵
      • Program crash
      PID:4220
  • C:\Windows\SysWOW64\idmdqfkz\htauzfsa.exe
    C:\Windows\SysWOW64\idmdqfkz\htauzfsa.exe /d"C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3700
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:1736
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3700 -s 516
      2⤵
      • Program crash
      PID:1004
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3700 -s 540
      2⤵
      • Program crash
      PID:2560
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3700 -s 524
      2⤵
      • Program crash
      PID:3108
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3024 -ip 3024
    1⤵
      PID:2524
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3024 -ip 3024
      1⤵
        PID:3372
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3024 -ip 3024
        1⤵
          PID:2500
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3700 -ip 3700
          1⤵
            PID:4868
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3700 -ip 3700
            1⤵
              PID:3708
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3700 -ip 3700
              1⤵
                PID:5036

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

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

                Filesize

                13.8MB

                MD5

                7c7444f566fd2dcd8a3fbb4f97c540bf

                SHA1

                e74ddbae29813ccc6d96ff4c4578a5af0de78ca1

                SHA256

                6e3ad445b3ddd4b4eb2f7775bff9699db748387080784826328a560dc280f823

                SHA512

                bad8303214e5d79acd0090be2cda75a347c55efeb37dfc4f9985d9f266b89f31f984fc3bf85efc5ce42dc01acbd00ac57cee45218bdfaef4e351d4ec9fafe2a5

              • memory/1736-9-0x00000000009E0000-0x00000000009F5000-memory.dmp

                Filesize

                84KB

              • memory/1736-18-0x00000000009E0000-0x00000000009F5000-memory.dmp

                Filesize

                84KB

              • memory/1736-17-0x00000000009E0000-0x00000000009F5000-memory.dmp

                Filesize

                84KB

              • memory/3024-13-0x0000000000400000-0x000000000086B000-memory.dmp

                Filesize

                4.4MB

              • memory/3024-15-0x0000000000400000-0x0000000000415000-memory.dmp

                Filesize

                84KB

              • memory/3024-14-0x0000000000CD0000-0x0000000000CE3000-memory.dmp

                Filesize

                76KB

              • memory/3024-1-0x0000000000A90000-0x0000000000B90000-memory.dmp

                Filesize

                1024KB

              • memory/3024-4-0x0000000000400000-0x0000000000415000-memory.dmp

                Filesize

                84KB

              • memory/3024-2-0x0000000000CD0000-0x0000000000CE3000-memory.dmp

                Filesize

                76KB

              • memory/3700-12-0x0000000000400000-0x000000000086B000-memory.dmp

                Filesize

                4.4MB

              • memory/3700-10-0x0000000000400000-0x000000000086B000-memory.dmp

                Filesize

                4.4MB

              • memory/3700-8-0x0000000000400000-0x000000000086B000-memory.dmp

                Filesize

                4.4MB