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Analysis

  • max time kernel
    298s
  • max time network
    313s
  • platform
    windows10-1703_x64
  • resource
    win10-20231020-en
  • resource tags

    arch:x64arch:x86image:win10-20231020-enlocale:en-usos:windows10-1703-x64system
  • submitted
    20/11/2023, 04:49

General

  • Target

    799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe

  • Size

    276KB

  • MD5

    579bef931c82955a57587da5bbb15866

  • SHA1

    49524805286b19afc22f227531bf64146c88ae48

  • SHA256

    799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4

  • SHA512

    f21dff5d462696a067aab843a06dfb7b0cb3e1fa931693046089f33dcb9011e331bd83a99b5c5666df2d7ed59b7af5b2c02f4138cb1280a1b0d4733a0aa0ca65

  • SSDEEP

    3072:X6qeH/j3LXZp9I+LmqGm1+0C+7Fys1/mQqeZApUn2/LhRXQLOPf7ovbeB4:AH3f9I+aJmYEhys1/mdDp5/TQOPTM

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 10 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 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe
    "C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kjpntyqz\
      2⤵
        PID:4520
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ndzojbzh.exe" C:\Windows\SysWOW64\kjpntyqz\
        2⤵
          PID:1064
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kjpntyqz binPath= "C:\Windows\SysWOW64\kjpntyqz\ndzojbzh.exe /d\"C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1312
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kjpntyqz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:912
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kjpntyqz
          2⤵
          • Launches sc.exe
          PID:1468
        • 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:2608
      • C:\Windows\SysWOW64\kjpntyqz\ndzojbzh.exe
        C:\Windows\SysWOW64\kjpntyqz\ndzojbzh.exe /d"C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1372
        • 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:5116
          • 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:4416

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.1MB

        MD5

        27d15675dbfdb94d0747830cf636c383

        SHA1

        33e8bde60ddb57493d720421e56ead8a1f095940

        SHA256

        ae7068b9dc1a45b2c5cb65e9036d043f0866fc9377ac416e03a0165ccf6c70b9

        SHA512

        abef2c0c5f713cb1c7e55542352271611c67e8efbd6a7fdf8bf0a8890be5f847deeb0ed21c2bcc6106d43cf1381006c5e57f0a9d0b456389599a3c499a56d7b7

      • C:\Windows\SysWOW64\kjpntyqz\ndzojbzh.exe

        Filesize

        11.1MB

        MD5

        27d15675dbfdb94d0747830cf636c383

        SHA1

        33e8bde60ddb57493d720421e56ead8a1f095940

        SHA256

        ae7068b9dc1a45b2c5cb65e9036d043f0866fc9377ac416e03a0165ccf6c70b9

        SHA512

        abef2c0c5f713cb1c7e55542352271611c67e8efbd6a7fdf8bf0a8890be5f847deeb0ed21c2bcc6106d43cf1381006c5e57f0a9d0b456389599a3c499a56d7b7

      • memory/1372-11-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/1372-10-0x0000000000810000-0x0000000000910000-memory.dmp

        Filesize

        1024KB

      • memory/1372-14-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/4416-69-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-68-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-61-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-66-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-67-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-70-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-72-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-73-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-74-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/4416-71-0x0000000000A00000-0x0000000000AF1000-memory.dmp

        Filesize

        964KB

      • memory/5096-8-0x0000000000560000-0x0000000000573000-memory.dmp

        Filesize

        76KB

      • memory/5096-1-0x00000000006A0000-0x00000000007A0000-memory.dmp

        Filesize

        1024KB

      • memory/5096-2-0x0000000000560000-0x0000000000573000-memory.dmp

        Filesize

        76KB

      • memory/5096-7-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/5096-4-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/5116-39-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-48-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-35-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-36-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-37-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-38-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-34-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-40-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-41-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-43-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-42-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-44-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-45-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-46-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-47-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-33-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-49-0x0000000000DF0000-0x0000000000DF5000-memory.dmp

        Filesize

        20KB

      • memory/5116-52-0x0000000000DF0000-0x0000000000DF5000-memory.dmp

        Filesize

        20KB

      • memory/5116-53-0x0000000008710000-0x0000000008B1B000-memory.dmp

        Filesize

        4.0MB

      • memory/5116-56-0x0000000008710000-0x0000000008B1B000-memory.dmp

        Filesize

        4.0MB

      • memory/5116-57-0x00000000037F0000-0x00000000037F7000-memory.dmp

        Filesize

        28KB

      • memory/5116-32-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-29-0x00000000005D0000-0x00000000005E0000-memory.dmp

        Filesize

        64KB

      • memory/5116-26-0x00000000005C0000-0x00000000005C6000-memory.dmp

        Filesize

        24KB

      • memory/5116-25-0x0000000003F40000-0x000000000414F000-memory.dmp

        Filesize

        2.1MB

      • memory/5116-22-0x0000000003F40000-0x000000000414F000-memory.dmp

        Filesize

        2.1MB

      • memory/5116-20-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/5116-19-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/5116-18-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/5116-17-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/5116-12-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/5116-75-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB