Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2023, 12:44

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:2244
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vtcgskmm\
      2⤵
        PID:2240
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iuglionb.exe" C:\Windows\SysWOW64\vtcgskmm\
        2⤵
          PID:2032
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vtcgskmm binPath= "C:\Windows\SysWOW64\vtcgskmm\iuglionb.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2808
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vtcgskmm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vtcgskmm
          2⤵
          • Launches sc.exe
          PID:2652
        • 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:2724
      • C:\Windows\SysWOW64\vtcgskmm\iuglionb.exe
        C:\Windows\SysWOW64\vtcgskmm\iuglionb.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2640
        • 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:2680
          • 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:1288

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.0MB

        MD5

        44dd7fb95a196cc2bc693da272d3d48d

        SHA1

        3d92731c5b34162240ad474ff94c7c091fea29c4

        SHA256

        5d4ece2e3488a8fb9b61e1e9875510907420ea80cf2384e0c41440280898855a

        SHA512

        08874325c91a53dc83ebfd28929e58237b36f24caada47480a9f71ce9ba5c3a85e3dd43424330c976995dd92d4e87bf95e627c17b04cb2b866d057673fdb539c

      • C:\Windows\SysWOW64\vtcgskmm\iuglionb.exe

        Filesize

        11.0MB

        MD5

        44dd7fb95a196cc2bc693da272d3d48d

        SHA1

        3d92731c5b34162240ad474ff94c7c091fea29c4

        SHA256

        5d4ece2e3488a8fb9b61e1e9875510907420ea80cf2384e0c41440280898855a

        SHA512

        08874325c91a53dc83ebfd28929e58237b36f24caada47480a9f71ce9ba5c3a85e3dd43424330c976995dd92d4e87bf95e627c17b04cb2b866d057673fdb539c

      • memory/1288-78-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-63-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-65-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1288-73-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-74-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-75-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-76-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/1288-77-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/2244-1-0x00000000006E0000-0x00000000007E0000-memory.dmp

        Filesize

        1024KB

      • memory/2244-9-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2244-7-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2244-3-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2244-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2640-18-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2640-12-0x0000000000400000-0x00000000005A8000-memory.dmp

        Filesize

        1.7MB

      • memory/2640-10-0x0000000000770000-0x0000000000870000-memory.dmp

        Filesize

        1024KB

      • memory/2680-36-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-46-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-31-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-34-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-35-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-27-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2680-37-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-38-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-39-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-40-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-41-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-42-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-43-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-44-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-45-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-28-0x00000000000E0000-0x00000000000E6000-memory.dmp

        Filesize

        24KB

      • memory/2680-47-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-48-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-50-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-49-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/2680-51-0x0000000000350000-0x0000000000355000-memory.dmp

        Filesize

        20KB

      • memory/2680-54-0x0000000000350000-0x0000000000355000-memory.dmp

        Filesize

        20KB

      • memory/2680-55-0x00000000059F0000-0x0000000005DFB000-memory.dmp

        Filesize

        4.0MB

      • memory/2680-24-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2680-23-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2680-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2680-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2680-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2680-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2680-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2680-58-0x00000000059F0000-0x0000000005DFB000-memory.dmp

        Filesize

        4.0MB

      • memory/2680-59-0x0000000000360000-0x0000000000367000-memory.dmp

        Filesize

        28KB