Analysis

  • max time kernel
    146s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2023, 05:23

General

  • Target

    file.exe

  • Size

    202KB

  • MD5

    0e912c89df4a4fce65d70506d0e7f233

  • SHA1

    e437ddd952485dab4dde33373c8dfc1d2cc8370d

  • SHA256

    45b199d7f3571172242647277be284df1a6fd3c4a01b084ec02bd9f661a8daf3

  • SHA512

    9063e2f1b35887ffeeeea778ac5881895ce50baa41635082b451dcbf40e81826e68f773649f36437a032769c81f80cf255f1fe6f8dd915aed2937ffa62978191

  • SSDEEP

    3072:/RqPDovM85s6O/z0U6Xz8nTNKYwPV4spZRvolZgw5HX/Vr:KDXIjkoU64R8dTRQlFPV

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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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:1900
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\snnkmgik\
      2⤵
        PID:1532
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hfucvlgc.exe" C:\Windows\SysWOW64\snnkmgik\
        2⤵
          PID:2656
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create snnkmgik binPath= "C:\Windows\SysWOW64\snnkmgik\hfucvlgc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2668
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description snnkmgik "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start snnkmgik
          2⤵
          • Launches sc.exe
          PID:2572
        • 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:2648
      • C:\Windows\SysWOW64\snnkmgik\hfucvlgc.exe
        C:\Windows\SysWOW64\snnkmgik\hfucvlgc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2628
        • 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:2512
          • 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:1552

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              12.7MB

              MD5

              039a12c21d6d6710551953c5c984a13a

              SHA1

              48e2cac6b07783469a4e70cd2f16b0f1a48570d5

              SHA256

              b3188fc1ca792e7a4ff4544dd96a700609d2f3d31acfac0044f704ef8eb6dede

              SHA512

              43466952fb20e7a6f49cda13d48842a2c524c91703f9f96a87d4cd6819f1a38fdd032e9607e3b39aafbeab681c0d62941d52dfe7d2468d5cd355bc2baa898178

            • C:\Windows\SysWOW64\snnkmgik\hfucvlgc.exe

              Filesize

              12.7MB

              MD5

              039a12c21d6d6710551953c5c984a13a

              SHA1

              48e2cac6b07783469a4e70cd2f16b0f1a48570d5

              SHA256

              b3188fc1ca792e7a4ff4544dd96a700609d2f3d31acfac0044f704ef8eb6dede

              SHA512

              43466952fb20e7a6f49cda13d48842a2c524c91703f9f96a87d4cd6819f1a38fdd032e9607e3b39aafbeab681c0d62941d52dfe7d2468d5cd355bc2baa898178

            • memory/1552-77-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-76-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-75-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-74-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-72-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-73-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-64-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1552-62-0x00000000000F0000-0x00000000001E1000-memory.dmp

              Filesize

              964KB

            • memory/1900-4-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1900-6-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/1900-1-0x0000000000780000-0x0000000000880000-memory.dmp

              Filesize

              1024KB

            • memory/1900-2-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2512-50-0x00000000001B0000-0x00000000001B5000-memory.dmp

              Filesize

              20KB

            • memory/2512-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/2512-26-0x0000000001920000-0x0000000001B2F000-memory.dmp

              Filesize

              2.1MB

            • memory/2512-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-23-0x0000000001920000-0x0000000001B2F000-memory.dmp

              Filesize

              2.1MB

            • memory/2512-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2512-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2512-53-0x00000000001B0000-0x00000000001B5000-memory.dmp

              Filesize

              20KB

            • memory/2512-54-0x0000000005430000-0x000000000583B000-memory.dmp

              Filesize

              4.0MB

            • memory/2512-57-0x0000000005430000-0x000000000583B000-memory.dmp

              Filesize

              4.0MB

            • memory/2512-58-0x0000000000250000-0x0000000000257000-memory.dmp

              Filesize

              28KB

            • memory/2512-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2512-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2512-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2512-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2512-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2628-19-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2628-10-0x0000000000400000-0x00000000005A9000-memory.dmp

              Filesize

              1.7MB

            • memory/2628-9-0x0000000000230000-0x0000000000330000-memory.dmp

              Filesize

              1024KB