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Analysis

  • max time kernel
    143s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    19/09/2023, 23:25

General

  • Target

    file.exe

  • Size

    214KB

  • MD5

    853a0ef89b1532e80c7e14d14cbf0073

  • SHA1

    8d83ff39485dab7df49d527cca9bfc53938597e8

  • SHA256

    a34e57fcf36648d26b35a8e3e43d4c523bd07216bda22c2a283c4a6a22e7d070

  • SHA512

    b1eb21f26a6c7857356b7b8578cfbc0bdb1bb9a3ae6d0c7b9d0968e9bce4c06544124f03f4cbcd7e975be6f8237cdd10f22c12fecaddfbd8854c687503839c9d

  • SSDEEP

    3072:+AXMadk9mLIqG7/IovYa4EVFW5hgWAErvf+XSLwVtxjpkwnwxLB5bSDT0K:TMaO9mL07/IrMF1WFVLwlZwdnSDT

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:1964
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\caglngfb\
      2⤵
        PID:2596
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ubezyssm.exe" C:\Windows\SysWOW64\caglngfb\
        2⤵
          PID:1892
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create caglngfb binPath= "C:\Windows\SysWOW64\caglngfb\ubezyssm.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2396
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description caglngfb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2740
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start caglngfb
          2⤵
          • Launches sc.exe
          PID:2736
        • 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:2124
      • C:\Windows\SysWOW64\caglngfb\ubezyssm.exe
        C:\Windows\SysWOW64\caglngfb\ubezyssm.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3004
        • 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:2684
          • 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:1992

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.3MB

        MD5

        3f9fddab14cc720ef7770510e8ae2703

        SHA1

        fa51b969aea8f38697e606618e9c7f5e3a29e060

        SHA256

        56b271ffbc686eb6f0525f3c3145e3234fd17916635a4ed462297abcad0ea1f8

        SHA512

        a2216590f59e3a3573711f2eabde39e8e60c5d59154b846175ef8df16aa257564478289ed76f50ba8803c776f99bbb2e8f9d59f27802060f70410fcc6e39eb67

      • C:\Windows\SysWOW64\caglngfb\ubezyssm.exe

        Filesize

        11.3MB

        MD5

        3f9fddab14cc720ef7770510e8ae2703

        SHA1

        fa51b969aea8f38697e606618e9c7f5e3a29e060

        SHA256

        56b271ffbc686eb6f0525f3c3145e3234fd17916635a4ed462297abcad0ea1f8

        SHA512

        a2216590f59e3a3573711f2eabde39e8e60c5d59154b846175ef8df16aa257564478289ed76f50ba8803c776f99bbb2e8f9d59f27802060f70410fcc6e39eb67

      • memory/1964-0-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/1964-1-0x00000000002C0000-0x00000000002D3000-memory.dmp

        Filesize

        76KB

      • memory/1964-2-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/1964-6-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/1964-7-0x00000000002C0000-0x00000000002D3000-memory.dmp

        Filesize

        76KB

      • memory/1964-8-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/1992-77-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-76-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-75-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-74-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-73-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-72-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1992-64-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1992-62-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2684-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-26-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2684-30-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-23-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2684-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-27-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2684-47-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-48-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-49-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/2684-50-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/2684-53-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/2684-54-0x0000000005380000-0x000000000578B000-memory.dmp

        Filesize

        4.0MB

      • memory/2684-58-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

      • memory/2684-57-0x0000000005380000-0x000000000578B000-memory.dmp

        Filesize

        4.0MB

      • memory/2684-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2684-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2684-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2684-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2684-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2684-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3004-16-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/3004-10-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/3004-9-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB