Resubmissions

24-11-2021 13:59

211124-rahp4acghj 10

24-11-2021 09:36

211124-lk29laccgq 8

Analysis

  • max time kernel
    117s
  • max time network
    158s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    24-11-2021 13:59

General

  • Target

    emk21h33.exe

  • Size

    385KB

  • MD5

    54e8989f3595120a430b8d31ca87c0cc

  • SHA1

    30609e95e4396e7c409b21e0d96c185736cc01d2

  • SHA256

    74a717027b6212236662bf641c473b8f8cd65486898b02940357bb9b3035f38a

  • SHA512

    56d102a6723e79e0fd4bf5756cf5fe01c36d62a9f1c0575750c288ab9b6de119ce6675a5156c80f4ed3274962981a14095ced7c9d213f9e9216b4a655ab66206

Malware Config

Signatures

  • Disables Task Manager via registry modification
  • Downloads MZ/PE file
  • Downloads PsExec from SysInternals website 1 IoCs

    Sysinternals tools like PsExec are often leveraged maliciously by malware families due to being commonly used by testers/administrators.

  • Modifies Windows Firewall 1 TTPs
  • Modifies extensions of user files 7 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Modifies WinLogon 2 TTPs 2 IoCs
  • Drops file in Windows directory 13 IoCs
  • Launches sc.exe

    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.

  • Kills process with taskkill 58 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 60 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\emk21h33.exe
    "C:\Users\Admin\AppData\Local\Temp\emk21h33.exe"
    1⤵
    • Modifies extensions of user files
    • Enumerates connected drives
    • Modifies WinLogon
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1876
    • C:\Windows\SysWOW64\taskkill.exe
      "taskkill" /F /IM RaccineSettings.exe
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:832
    • C:\Windows\SysWOW64\reg.exe
      "reg" delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Raccine Tray" /F
      2⤵
        PID:1408
      • C:\Windows\SysWOW64\reg.exe
        "reg" delete HKCU\Software\Raccine /F
        2⤵
        • Modifies registry key
        PID:2408
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /DELETE /TN "Raccine Rules Updater" /F
        2⤵
          PID:656
        • C:\Windows\SysWOW64\sc.exe
          "sc.exe" config Dnscache start= auto
          2⤵
            PID:3924
          • C:\Windows\SysWOW64\sc.exe
            "sc.exe" config SQLTELEMETRY start= disabled
            2⤵
              PID:3444
            • C:\Windows\SysWOW64\sc.exe
              "sc.exe" config FDResPub start= auto
              2⤵
                PID:3576
              • C:\Windows\SysWOW64\sc.exe
                "sc.exe" config SSDPSRV start= auto
                2⤵
                  PID:980
                • C:\Windows\SysWOW64\sc.exe
                  "sc.exe" config SstpSvc start= disabled
                  2⤵
                    PID:1840
                  • C:\Windows\SysWOW64\sc.exe
                    "sc.exe" config SQLTELEMETRY$ECWDB2 start= disabled
                    2⤵
                      PID:1928
                    • C:\Windows\SysWOW64\sc.exe
                      "sc.exe" config upnphost start= auto
                      2⤵
                        PID:2180
                      • C:\Windows\SysWOW64\sc.exe
                        "sc.exe" config SQLWriter start= disabled
                        2⤵
                          PID:2948
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mspub.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:396
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM synctime.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1692
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mspub.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3496
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopqos.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1376
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2716
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM Ntrtscan.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1688
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopservice.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2136
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM isqlplussvc.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2840
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqbcoreservice.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3392
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM onenote.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3780
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM firefoxconfig.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:908
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM encsvc.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3512
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM tbirdconfig.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2176
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM PccNTMon.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:4068
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM agntsvc.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:304
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM excel.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1052
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM dbeng50.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3592
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM msaccess.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:596
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM outlook.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1924
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM CNTAoSMgr.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1844
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM thebat.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:608
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM thebat64.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:404
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM tmlisten.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3144
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlwriter.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3440
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM steam.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2220
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ocomm.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1736
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM msftesql.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3896
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" IM thunderbird.exe /F
                          2⤵
                          • Kills process with taskkill
                          PID:1996
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM wordpad.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3060
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM dbsnmp.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2448
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM infopath.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:964
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM powerpnt.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2952
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld-opt.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2192
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM xfssvccon.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3016
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mbamtray.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1936
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ocautoupds.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2704
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopqos.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3304
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ocssd.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1852
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM zoolz.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1140
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM visio.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2424
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM oracle.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:968
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopservice.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1592
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlagent.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:612
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM winword.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3488
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlbrowser.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:932
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld-nt.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1976
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlservr.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3224
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ragent.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3500
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqld.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2884
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysql.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1944
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM rmngr.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3212
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3956
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM rphost.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:864
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM vmwp.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1520
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sql.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1996
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM oracle.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1692
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM 1cv8.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:4068
                        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                          "powershell.exe" & Get-WmiObject Win32_Shadowcopy | ForEach-Object { $_Delete(); }
                          2⤵
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1192
                        • C:\Windows\SysWOW64\netsh.exe
                          "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes
                          2⤵
                          • Drops file in Windows directory
                          PID:3608
                        • C:\Windows\SysWOW64\netsh.exe
                          "netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes
                          2⤵
                            PID:1940
                          • C:\Windows\SysWOW64\arp.exe
                            "arp" -a
                            2⤵
                              PID:1212
                            • C:\Windows\SysWOW64\cmd.exe
                              "cmd.exe" /c rd /s /q %SYSTEMDRIVE%\\$Recycle.bin
                              2⤵
                                PID:400
                              • C:\Windows\SysWOW64\netsh.exe
                                "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes
                                2⤵
                                  PID:2340
                                • C:\Windows\SysWOW64\netsh.exe
                                  "netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes
                                  2⤵
                                    PID:1688
                                  • C:\Windows\SysWOW64\arp.exe
                                    "arp" -a
                                    2⤵
                                      PID:3472
                                    • C:\Windows\SysWOW64\notepad.exe
                                      "C:\Windows\System32\notepad.exe" C:\Users\Admin\Desktop\Инструкция.txt
                                      2⤵
                                        PID:2284
                                      • C:\Windows\SysWOW64\cmd.exe
                                        "cmd.exe" /C ping 127.0.0.7 -n 3 > Nul & fsutil file setZeroData offset=0 length=524288 “%s” & Del /f /q “%s”
                                        2⤵
                                          PID:1280
                                          • C:\Windows\SysWOW64\PING.EXE
                                            ping 127.0.0.7 -n 3
                                            3⤵
                                            • Runs ping.exe
                                            PID:3696
                                          • C:\Windows\SysWOW64\fsutil.exe
                                            fsutil file setZeroData offset=0 length=524288 “%s”
                                            3⤵
                                              PID:2624
                                          • C:\Windows\SysWOW64\cmd.exe
                                            "C:\Windows\System32\cmd.exe" "/C choice /C Y /N /D Y /T 3 & Del "C:\Users\Admin\AppData\Local\Temp\emk21h33.exe
                                            2⤵
                                              PID:2724
                                          • C:\Windows\splwow64.exe
                                            C:\Windows\splwow64.exe 12288
                                            1⤵
                                              PID:4032

                                            Network

                                            MITRE ATT&CK Enterprise v6

                                            Replay Monitor

                                            Loading Replay Monitor...

                                            Downloads

                                            • memory/1192-188-0x00000000042D0000-0x00000000042D1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-191-0x0000000007510000-0x0000000007511000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-189-0x00000000067F0000-0x00000000067F1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-187-0x00000000042D0000-0x00000000042D1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-199-0x0000000008170000-0x0000000008171000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-200-0x00000000042D0000-0x00000000042D1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-190-0x0000000006E60000-0x0000000006E61000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-198-0x0000000008020000-0x0000000008021000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-197-0x0000000007870000-0x0000000007871000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-196-0x00000000067A2000-0x00000000067A3000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-210-0x00000000042D0000-0x00000000042D1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-195-0x00000000067A0000-0x00000000067A1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-194-0x00000000078A0000-0x00000000078A1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1192-212-0x00000000067A4000-0x00000000067A6000-memory.dmp

                                              Filesize

                                              8KB

                                            • memory/1192-211-0x00000000067A3000-0x00000000067A4000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1876-126-0x00000000052D0000-0x00000000052D1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1876-213-0x0000000008460000-0x0000000008461000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1876-120-0x0000000004BC0000-0x0000000004BC1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1876-121-0x0000000005350000-0x0000000005351000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1876-118-0x0000000000370000-0x0000000000371000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/1876-214-0x0000000007F60000-0x0000000007F61000-memory.dmp

                                              Filesize

                                              4KB