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Analysis

  • max time kernel
    13s
  • max time network
    17s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/11/2022, 19:55

General

  • Target

    file.exe

  • Size

    147KB

  • MD5

    47ce9ed9195c4e612073ae5e1672e5b4

  • SHA1

    59ce202ca406b8231beb7e21d93ef273723a66e0

  • SHA256

    365774579036398a227dd43ab69bfb57221aa97700cd37e0bc7bd764420db839

  • SHA512

    785bb50a883500b0dcbd11e59b6bcafa30a737c50b7dccc3502a29f4fb107fab98d954b51e123112b9692e4f8d9d300f5f81c1275389b9223acb22f149018e16

  • SSDEEP

    3072:K+LFVOQgneprGk53rCVioI4owCnK1lDGD4x+99:LFVonkr/rgioI4owCn+IDD

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

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

  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ahtpbhwn\
      2⤵
        PID:3400
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ncqngmil.exe" C:\Windows\SysWOW64\ahtpbhwn\
        2⤵
          PID:2316
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ahtpbhwn binPath= "C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1104
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ahtpbhwn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2628
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ahtpbhwn
          2⤵
          • Launches sc.exe
          PID:2092
        • 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:4140
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 584
          2⤵
          • Program crash
          PID:4012
      • C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe
        C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        PID:220
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
            PID:4352
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4868 -ip 4868
          1⤵
            PID:3296
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 220 -ip 220
            1⤵
              PID:4648

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

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

              Filesize

              10.8MB

              MD5

              d11ce882ad0e49e35cbfd45718b5d24e

              SHA1

              7f23d44269a35f15a6ad06bfc4d8b59fa2abb718

              SHA256

              85c5430fec52ec4da2e649d040a672d8c97d22e8694f90133ede26a8c6b84656

              SHA512

              b3dcfaa4769c9e03acf3f0875f62b1182fc45451e5df845fcb9d17c6abd50448f4f5e86893ac657fb7bad834e3a446a89e63ece5510462962a461ab21524458f

            • C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe

              Filesize

              10.8MB

              MD5

              d11ce882ad0e49e35cbfd45718b5d24e

              SHA1

              7f23d44269a35f15a6ad06bfc4d8b59fa2abb718

              SHA256

              85c5430fec52ec4da2e649d040a672d8c97d22e8694f90133ede26a8c6b84656

              SHA512

              b3dcfaa4769c9e03acf3f0875f62b1182fc45451e5df845fcb9d17c6abd50448f4f5e86893ac657fb7bad834e3a446a89e63ece5510462962a461ab21524458f

            • memory/220-145-0x0000000000400000-0x000000000045A000-memory.dmp

              Filesize

              360KB

            • memory/220-144-0x00000000007A9000-0x00000000007B9000-memory.dmp

              Filesize

              64KB

            • memory/4352-147-0x0000000001020000-0x0000000001035000-memory.dmp

              Filesize

              84KB

            • memory/4868-132-0x00000000005DD000-0x00000000005ED000-memory.dmp

              Filesize

              64KB

            • memory/4868-143-0x0000000000400000-0x000000000045A000-memory.dmp

              Filesize

              360KB

            • memory/4868-134-0x0000000000400000-0x000000000045A000-memory.dmp

              Filesize

              360KB

            • memory/4868-133-0x0000000000520000-0x0000000000533000-memory.dmp

              Filesize

              76KB