Analysis

  • max time kernel
    298s
  • max time network
    306s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2023, 04:49

General

  • Target

    e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a.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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a.exe
    "C:\Users\Admin\AppData\Local\Temp\e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2944
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zungkxqm\
      2⤵
        PID:3056
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xjvaxdcq.exe" C:\Windows\SysWOW64\zungkxqm\
        2⤵
          PID:2144
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zungkxqm binPath= "C:\Windows\SysWOW64\zungkxqm\xjvaxdcq.exe /d\"C:\Users\Admin\AppData\Local\Temp\e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zungkxqm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2600
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zungkxqm
          2⤵
          • Launches sc.exe
          PID:2776
        • 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:1304
      • C:\Windows\SysWOW64\zungkxqm\xjvaxdcq.exe
        C:\Windows\SysWOW64\zungkxqm\xjvaxdcq.exe /d"C:\Users\Admin\AppData\Local\Temp\e6eba455a3dec3f3b4f52ec852f0335b4955b6508d9d6d6b90e9c21ab293cf0a.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2788
        • 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:2732
          • 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:1616

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.1MB

        MD5

        51e8c27efd5e74962ddb05fd994da7af

        SHA1

        d979d1521390beb9d69ca0582f07a3214f527026

        SHA256

        73cb79863cde6de5e5532e681de5e2bbf4aba91c63995933a7162ce2d20c4eb7

        SHA512

        363e871466eb09054400f594ee511c50a036dbf796ecc3498849155ad1222a5dc688698e5d17e8b5992f0b59d8917177d854896c45eb4f299975db2a625608ba

      • C:\Windows\SysWOW64\zungkxqm\xjvaxdcq.exe

        Filesize

        11.1MB

        MD5

        51e8c27efd5e74962ddb05fd994da7af

        SHA1

        d979d1521390beb9d69ca0582f07a3214f527026

        SHA256

        73cb79863cde6de5e5532e681de5e2bbf4aba91c63995933a7162ce2d20c4eb7

        SHA512

        363e871466eb09054400f594ee511c50a036dbf796ecc3498849155ad1222a5dc688698e5d17e8b5992f0b59d8917177d854896c45eb4f299975db2a625608ba

      • memory/1616-62-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-77-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-76-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-75-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-74-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-73-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-72-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/1616-64-0x00000000000F0000-0x00000000001E1000-memory.dmp

        Filesize

        964KB

      • memory/2732-37-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-42-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2732-19-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2732-20-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2732-22-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2732-23-0x0000000001A50000-0x0000000001C5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2732-27-0x0000000000220000-0x0000000000226000-memory.dmp

        Filesize

        24KB

      • memory/2732-26-0x0000000001A50000-0x0000000001C5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2732-30-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-33-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-34-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-35-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-36-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-12-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2732-38-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-39-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-40-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-41-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-15-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2732-43-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-44-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-45-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-47-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-46-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-48-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-49-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2732-50-0x00000000003B0000-0x00000000003B5000-memory.dmp

        Filesize

        20KB

      • memory/2732-53-0x00000000003B0000-0x00000000003B5000-memory.dmp

        Filesize

        20KB

      • memory/2732-54-0x00000000059A0000-0x0000000005DAB000-memory.dmp

        Filesize

        4.0MB

      • memory/2732-57-0x00000000059A0000-0x0000000005DAB000-memory.dmp

        Filesize

        4.0MB

      • memory/2732-58-0x00000000003C0000-0x00000000003C7000-memory.dmp

        Filesize

        28KB

      • memory/2788-16-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/2788-11-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/2788-10-0x00000000002D0000-0x00000000003D0000-memory.dmp

        Filesize

        1024KB

      • memory/2944-1-0x00000000006E0000-0x00000000007E0000-memory.dmp

        Filesize

        1024KB

      • memory/2944-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2944-6-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/2944-3-0x0000000000400000-0x00000000005A9000-memory.dmp

        Filesize

        1.7MB

      • memory/2944-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB