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Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    07/11/2023, 03:18

General

  • Target

    f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199.exe

  • Size

    253KB

  • MD5

    cc2a72f82d92baff8f3f98da48101ab4

  • SHA1

    e2377c18ce0858f84b50ac9317de81f15c196b8c

  • SHA256

    f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199

  • SHA512

    369ae41f47dbb81fd7a0afb2504aadf2713b887a6c424c63a5cb7b7ceda28cae1eef4fa1c005fa33cde8ec0c93d51f8cfb25aaa0ec0039cc2277b9160e491e7f

  • SSDEEP

    3072:HFRhzXDDoLnJJDCEtGKL+5mDyHZMctBDnuUY7yHjP4q5XWtlV1f:lRhzXPoLnvDPtGE6gyHdtfYmHj3WpV

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
  • Looks up external IP address via web service 1 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\f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199.exe
    "C:\Users\Admin\AppData\Local\Temp\f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qupjcdgi\
      2⤵
        PID:2764
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fvrgbtrz.exe" C:\Windows\SysWOW64\qupjcdgi\
        2⤵
          PID:1864
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qupjcdgi binPath= "C:\Windows\SysWOW64\qupjcdgi\fvrgbtrz.exe /d\"C:\Users\Admin\AppData\Local\Temp\f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2620
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qupjcdgi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2596
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qupjcdgi
          2⤵
          • Launches sc.exe
          PID:2500
        • 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:2760
      • C:\Windows\SysWOW64\qupjcdgi\fvrgbtrz.exe
        C:\Windows\SysWOW64\qupjcdgi\fvrgbtrz.exe /d"C:\Users\Admin\AppData\Local\Temp\f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2836
        • 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:2700
          • 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:1448

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.8MB

        MD5

        5b4e5f6ce14195fd18d49a01f229ac2d

        SHA1

        3c90e0dc1ddda6bff0b5552bc9d1b80d76642163

        SHA256

        4a5d2466b95840fcc295da033cc60d71a6810e7b83f2f832a9c3ab97a2c6963d

        SHA512

        1a844bb1d32df5b625f06f06ec63c48716d0de28baece0f4fe8c9fe228cc1d2faa4312acdf272a2d54d526e73de4e94180f5298e623d7056a70076aa0841f691

      • C:\Windows\SysWOW64\qupjcdgi\fvrgbtrz.exe

        Filesize

        10.8MB

        MD5

        5b4e5f6ce14195fd18d49a01f229ac2d

        SHA1

        3c90e0dc1ddda6bff0b5552bc9d1b80d76642163

        SHA256

        4a5d2466b95840fcc295da033cc60d71a6810e7b83f2f832a9c3ab97a2c6963d

        SHA512

        1a844bb1d32df5b625f06f06ec63c48716d0de28baece0f4fe8c9fe228cc1d2faa4312acdf272a2d54d526e73de4e94180f5298e623d7056a70076aa0841f691

      • memory/1448-72-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-73-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-62-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-63-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-71-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-77-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-76-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-75-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1448-74-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/2208-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2208-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

        Filesize

        1024KB

      • memory/2208-3-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/2208-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2208-6-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/2700-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-27-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2700-30-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-33-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-23-0x00000000019D0000-0x0000000001BDF000-memory.dmp

        Filesize

        2.1MB

      • memory/2700-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-26-0x00000000019D0000-0x0000000001BDF000-memory.dmp

        Filesize

        2.1MB

      • memory/2700-47-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-49-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-48-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2700-50-0x0000000000160000-0x0000000000165000-memory.dmp

        Filesize

        20KB

      • memory/2700-53-0x0000000000160000-0x0000000000165000-memory.dmp

        Filesize

        20KB

      • memory/2700-54-0x00000000059D0000-0x0000000005DDB000-memory.dmp

        Filesize

        4.0MB

      • memory/2700-57-0x00000000059D0000-0x0000000005DDB000-memory.dmp

        Filesize

        4.0MB

      • memory/2700-58-0x00000000001B0000-0x00000000001B7000-memory.dmp

        Filesize

        28KB

      • memory/2700-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2700-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2700-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2700-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2700-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2700-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2836-16-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/2836-11-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/2836-10-0x00000000005F0000-0x00000000006F0000-memory.dmp

        Filesize

        1024KB