Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 23:33

General

  • Target

    35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe

  • Size

    274KB

  • MD5

    59e1227450eb946f0eb83fad2f72b1f5

  • SHA1

    b78400bfe2fb0dbe892b1dff5220a7de2c43dfc6

  • SHA256

    35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652

  • SHA512

    19fd57f8a026cd2cc64f4d8ac99538b9d90f9a33a3d70c2061131ea5094a53fa0c4bf23a6adaf51d06bdd799236860311cb4f67e7503ac43259461aedfeda1c2

  • SSDEEP

    3072:QlnO9lcF4LS5ZUsBHS9R071uEcR647ovb3Trh6e:UnXKL+By9R0ooMMrT

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 6 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 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe
    "C:\Users\Admin\AppData\Local\Temp\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rnmryywo\
      2⤵
        PID:2296
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qggdpbrp.exe" C:\Windows\SysWOW64\rnmryywo\
        2⤵
          PID:2740
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rnmryywo binPath= "C:\Windows\SysWOW64\rnmryywo\qggdpbrp.exe /d\"C:\Users\Admin\AppData\Local\Temp\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2832
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rnmryywo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rnmryywo
          2⤵
          • Launches sc.exe
          PID:2260
        • 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:2628
      • C:\Windows\SysWOW64\rnmryywo\qggdpbrp.exe
        C:\Windows\SysWOW64\rnmryywo\qggdpbrp.exe /d"C:\Users\Admin\AppData\Local\Temp\35da7aab0d190d5aeb04eaaa179c1cbd2302004c7671d6c71bc078a3df97d652.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2608
        • 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:624
          • 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:2900

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              12.6MB

              MD5

              30c3f00acb7113dd6a4be1e276dad0ab

              SHA1

              6e90e0ecb2ede77f8615a3057620d762f5e86a7c

              SHA256

              0822abe58fb66b773b06563638c1e717cbadfb4df88295d52c541221c4fd25ee

              SHA512

              a42e118a68c9587ddad7c7a1bbb1d8cf36ee99a89670c092a980354e2e4699236a5a63e8d800be5e4af7cf73e8fa8997d412ab1c5c92eb598ab0eb69f95f1a6f

            • C:\Windows\SysWOW64\rnmryywo\qggdpbrp.exe

              Filesize

              12.6MB

              MD5

              30c3f00acb7113dd6a4be1e276dad0ab

              SHA1

              6e90e0ecb2ede77f8615a3057620d762f5e86a7c

              SHA256

              0822abe58fb66b773b06563638c1e717cbadfb4df88295d52c541221c4fd25ee

              SHA512

              a42e118a68c9587ddad7c7a1bbb1d8cf36ee99a89670c092a980354e2e4699236a5a63e8d800be5e4af7cf73e8fa8997d412ab1c5c92eb598ab0eb69f95f1a6f

            • memory/624-37-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-64-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/624-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/624-40-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-60-0x0000000000200000-0x0000000000207000-memory.dmp

              Filesize

              28KB

            • memory/624-59-0x00000000058F0000-0x0000000005CFB000-memory.dmp

              Filesize

              4.0MB

            • memory/624-56-0x00000000058F0000-0x0000000005CFB000-memory.dmp

              Filesize

              4.0MB

            • memory/624-55-0x00000000001F0000-0x00000000001F5000-memory.dmp

              Filesize

              20KB

            • memory/624-52-0x00000000001F0000-0x00000000001F5000-memory.dmp

              Filesize

              20KB

            • memory/624-51-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-50-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-49-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-48-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/624-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/624-23-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/624-25-0x0000000001900000-0x0000000001B0F000-memory.dmp

              Filesize

              2.1MB

            • memory/624-28-0x0000000001900000-0x0000000001B0F000-memory.dmp

              Filesize

              2.1MB

            • memory/624-29-0x00000000000E0000-0x00000000000E6000-memory.dmp

              Filesize

              24KB

            • memory/624-32-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-35-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-36-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-39-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-38-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/624-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/624-41-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-42-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-43-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-44-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-45-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-46-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/624-47-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2220-1-0x0000000000650000-0x0000000000750000-memory.dmp

              Filesize

              1024KB

            • memory/2220-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2220-3-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2220-9-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2220-8-0x0000000000650000-0x0000000000750000-memory.dmp

              Filesize

              1024KB

            • memory/2220-7-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2220-6-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2608-18-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2608-15-0x0000000000400000-0x00000000004F9000-memory.dmp

              Filesize

              996KB

            • memory/2608-12-0x0000000000620000-0x0000000000720000-memory.dmp

              Filesize

              1024KB

            • memory/2900-65-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB

            • memory/2900-67-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB

            • memory/2900-76-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB

            • memory/2900-75-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB

            • memory/2900-77-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB

            • memory/2900-78-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB

            • memory/2900-79-0x0000000000270000-0x0000000000361000-memory.dmp

              Filesize

              964KB