Analysis

  • max time kernel
    297s
  • max time network
    304s
  • platform
    windows10-1703_x64
  • resource
    win10-20231023-en
  • resource tags

    arch:x64arch:x86image:win10-20231023-enlocale:en-usos:windows10-1703-x64system
  • submitted
    05/11/2023, 22:23

General

  • Target

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe

  • Size

    262KB

  • MD5

    81f5904645e44483a57226ab60e0390b

  • SHA1

    0bd97534d23998b6d554b48bddd0015d199808ec

  • SHA256

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7

  • SHA512

    5403b05a65105351fa5b6bc351b3613f930d16bbc0507045a340282029fdc688234fe3f92ef15fcdc9011650a3f96533f9254348bcf33159f381e8914abf281e

  • SSDEEP

    3072:pFzu3GMDmWLo3NrmuvLLCRpKbm/EJx9teHFKe0fk02q5XI7lVEaP:zzu2MqWLo9rmCXCR38biHF080VIjt

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).

  • Modifies data under HKEY_USERS 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe
    "C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2920
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ipfjmlwv\
      2⤵
        PID:324
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jddvyimy.exe" C:\Windows\SysWOW64\ipfjmlwv\
        2⤵
          PID:4108
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ipfjmlwv binPath= "C:\Windows\SysWOW64\ipfjmlwv\jddvyimy.exe /d\"C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ipfjmlwv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2112
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ipfjmlwv
          2⤵
          • Launches sc.exe
          PID:204
        • 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:4444
      • C:\Windows\SysWOW64\ipfjmlwv\jddvyimy.exe
        C:\Windows\SysWOW64\ipfjmlwv\jddvyimy.exe /d"C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3668
        • 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:3780
          • 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:2404

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.6MB

              MD5

              9830d5f13a0fc86a5d90380c9ea548df

              SHA1

              0df60d9229acfd9dc0eca4bcaa8e1a806648d8b1

              SHA256

              66d50f99944d30a85ed73bd2fab22549a0857f406cfc2c48e3791f8f2776f601

              SHA512

              ff0a7797a32e1fbb74bef9aab2d534977c8ba9f210caf425462678b53be128db5abf6023435dff4f6059562f634aaa3550bf3f9ea5aafad936f976d998f184f8

            • C:\Windows\SysWOW64\ipfjmlwv\jddvyimy.exe

              Filesize

              14.6MB

              MD5

              9830d5f13a0fc86a5d90380c9ea548df

              SHA1

              0df60d9229acfd9dc0eca4bcaa8e1a806648d8b1

              SHA256

              66d50f99944d30a85ed73bd2fab22549a0857f406cfc2c48e3791f8f2776f601

              SHA512

              ff0a7797a32e1fbb74bef9aab2d534977c8ba9f210caf425462678b53be128db5abf6023435dff4f6059562f634aaa3550bf3f9ea5aafad936f976d998f184f8

            • memory/2404-73-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-62-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-67-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-68-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-69-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-70-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-71-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-72-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-74-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2404-75-0x0000000000B00000-0x0000000000BF1000-memory.dmp

              Filesize

              964KB

            • memory/2920-2-0x00000000009E0000-0x00000000009F3000-memory.dmp

              Filesize

              76KB

            • memory/2920-8-0x00000000009E0000-0x00000000009F3000-memory.dmp

              Filesize

              76KB

            • memory/2920-6-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2920-3-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2920-1-0x0000000000BC0000-0x0000000000CC0000-memory.dmp

              Filesize

              1024KB

            • memory/3668-15-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/3668-13-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/3668-10-0x0000000000A60000-0x0000000000B60000-memory.dmp

              Filesize

              1024KB

            • memory/3780-37-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-49-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-35-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-36-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-33-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-38-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-39-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-40-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-42-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-41-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-45-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-46-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-47-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-48-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-44-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-34-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-43-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-50-0x00000000008F0000-0x00000000008F5000-memory.dmp

              Filesize

              20KB

            • memory/3780-53-0x00000000008F0000-0x00000000008F5000-memory.dmp

              Filesize

              20KB

            • memory/3780-54-0x0000000008B50000-0x0000000008F5B000-memory.dmp

              Filesize

              4.0MB

            • memory/3780-30-0x00000000008A0000-0x00000000008B0000-memory.dmp

              Filesize

              64KB

            • memory/3780-27-0x0000000000890000-0x0000000000896000-memory.dmp

              Filesize

              24KB

            • memory/3780-26-0x0000000004350000-0x000000000455F000-memory.dmp

              Filesize

              2.1MB

            • memory/3780-23-0x0000000004350000-0x000000000455F000-memory.dmp

              Filesize

              2.1MB

            • memory/3780-22-0x0000000000700000-0x0000000000715000-memory.dmp

              Filesize

              84KB

            • memory/3780-20-0x0000000000700000-0x0000000000715000-memory.dmp

              Filesize

              84KB

            • memory/3780-19-0x0000000000700000-0x0000000000715000-memory.dmp

              Filesize

              84KB

            • memory/3780-11-0x0000000000700000-0x0000000000715000-memory.dmp

              Filesize

              84KB

            • memory/3780-57-0x0000000008B50000-0x0000000008F5B000-memory.dmp

              Filesize

              4.0MB

            • memory/3780-58-0x00000000011A0000-0x00000000011A7000-memory.dmp

              Filesize

              28KB