Resubmissions

24-11-2021 13:59

211124-rahp4acghj 10

24-11-2021 09:36

211124-lk29laccgq 8

Analysis

  • max time kernel
    110s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    24-11-2021 09:36

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 13 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 59 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:2688
    • C:\Windows\SysWOW64\taskkill.exe
      "taskkill" /F /IM RaccineSettings.exe
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:3932
    • C:\Windows\SysWOW64\reg.exe
      "reg" delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Raccine Tray" /F
      2⤵
        PID:896
      • C:\Windows\SysWOW64\reg.exe
        "reg" delete HKCU\Software\Raccine /F
        2⤵
        • Modifies registry key
        PID:4020
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /DELETE /TN "Raccine Rules Updater" /F
        2⤵
          PID:636
        • C:\Windows\SysWOW64\sc.exe
          "sc.exe" config Dnscache start= auto
          2⤵
            PID:3920
          • C:\Windows\SysWOW64\sc.exe
            "sc.exe" config FDResPub start= auto
            2⤵
              PID:3332
            • C:\Windows\SysWOW64\sc.exe
              "sc.exe" config SQLTELEMETRY start= disabled
              2⤵
                PID:3712
              • C:\Windows\SysWOW64\sc.exe
                "sc.exe" config SSDPSRV start= auto
                2⤵
                  PID:2584
                • C:\Windows\SysWOW64\sc.exe
                  "sc.exe" config SstpSvc start= disabled
                  2⤵
                    PID:668
                  • C:\Windows\SysWOW64\sc.exe
                    "sc.exe" config SQLTELEMETRY$ECWDB2 start= disabled
                    2⤵
                      PID:1708
                    • C:\Windows\SysWOW64\sc.exe
                      "sc.exe" config SQLWriter start= disabled
                      2⤵
                        PID:400
                      • C:\Windows\SysWOW64\sc.exe
                        "sc.exe" config upnphost start= auto
                        2⤵
                          PID:1072
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mspub.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1224
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mspub.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1004
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM synctime.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1116
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM Ntrtscan.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:4008
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1860
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopqos.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2020
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopservice.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2164
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM isqlplussvc.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3496
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqbcoreservice.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:3168
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM encsvc.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3592
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM tbirdconfig.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:4032
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM onenote.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1724
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM agntsvc.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3800
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM excel.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1032
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM dbeng50.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2316
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM PccNTMon.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3144
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM thebat.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:508
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM CNTAoSMgr.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1168
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM msaccess.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3488
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM thebat64.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1288
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM steam.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1912
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlwriter.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:756
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ocomm.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2344
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" IM thunderbird.exe /F
                          2⤵
                          • Kills process with taskkill
                          PID:2504
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM dbsnmp.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2112
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM outlook.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2400
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM infopath.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2816
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM tmlisten.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3104
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM xfssvccon.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1336
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mbamtray.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3912
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM wordpad.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2432
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM msftesql.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3604
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM powerpnt.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2172
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM zoolz.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2368
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld-opt.exe /F
                          2⤵
                          • Kills process with taskkill
                          PID:1200
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopqos.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3128
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ocautoupds.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:900
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM visio.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2428
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ocssd.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1460
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mydesktopservice.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3316
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM oracle.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1232
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM winword.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:432
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlagent.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:600
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld-nt.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1616
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlbrowser.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1608
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqlservr.exe /F
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2092
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sqld.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2904
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM ragent.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2928
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM rmngr.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3824
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysql.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2136
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM mysqld.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3332
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM rphost.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2020
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM vmwp.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3616
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM sql.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3132
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM oracle.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1100
                        • C:\Windows\SysWOW64\taskkill.exe
                          "taskkill.exe" /IM 1cv8.exe /f
                          2⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1888
                        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                          "powershell.exe" & Get-WmiObject Win32_Shadowcopy | ForEach-Object { $_Delete(); }
                          2⤵
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2288
                        • C:\Windows\SysWOW64\netsh.exe
                          "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes
                          2⤵
                          • Drops file in Windows directory
                          PID:1056
                        • C:\Windows\SysWOW64\netsh.exe
                          "netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes
                          2⤵
                            PID:2720
                          • C:\Windows\SysWOW64\arp.exe
                            "arp" -a
                            2⤵
                              PID:1572
                            • C:\Windows\SysWOW64\cmd.exe
                              "cmd.exe" /c rd /s /q %SYSTEMDRIVE%\\$Recycle.bin
                              2⤵
                                PID:896
                              • C:\Windows\SysWOW64\netsh.exe
                                "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes
                                2⤵
                                  PID:2920
                                • C:\Windows\SysWOW64\netsh.exe
                                  "netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes
                                  2⤵
                                    PID:3156
                                  • C:\Windows\SysWOW64\arp.exe
                                    "arp" -a
                                    2⤵
                                      PID:3916
                                    • C:\Windows\SysWOW64\notepad.exe
                                      "C:\Windows\System32\notepad.exe" C:\Users\Admin\Desktop\Инструкция.txt
                                      2⤵
                                        PID:2012
                                      • 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:1288
                                          • C:\Windows\SysWOW64\PING.EXE
                                            ping 127.0.0.7 -n 3
                                            3⤵
                                            • Runs ping.exe
                                            PID:2400
                                          • C:\Windows\SysWOW64\fsutil.exe
                                            fsutil file setZeroData offset=0 length=524288 “%s”
                                            3⤵
                                              PID:4004
                                          • 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:2920
                                          • C:\Windows\splwow64.exe
                                            C:\Windows\splwow64.exe 12288
                                            1⤵
                                              PID:3748

                                            Network

                                            MITRE ATT&CK Enterprise v6

                                            Replay Monitor

                                            Loading Replay Monitor...

                                            Downloads

                                            • memory/2288-200-0x0000000004490000-0x0000000004491000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-187-0x0000000004490000-0x0000000004491000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-191-0x00000000045B0000-0x00000000045B1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-189-0x0000000004610000-0x0000000004611000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-190-0x0000000007140000-0x0000000007141000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-193-0x0000000007060000-0x0000000007061000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-211-0x00000000045B3000-0x00000000045B4000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-196-0x0000000007A00000-0x0000000007A01000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-197-0x00000000079D0000-0x00000000079D1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-192-0x00000000045B2000-0x00000000045B3000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-198-0x0000000008340000-0x0000000008341000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-199-0x0000000008060000-0x0000000008061000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-188-0x0000000004490000-0x0000000004491000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-210-0x0000000004490000-0x0000000004491000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2288-212-0x00000000045B4000-0x00000000045B6000-memory.dmp

                                              Filesize

                                              8KB

                                            • memory/2688-125-0x0000000005180000-0x0000000005181000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2688-120-0x00000000049B0000-0x00000000049B1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2688-214-0x0000000006BB0000-0x0000000006BB1000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2688-126-0x0000000005200000-0x0000000005201000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2688-118-0x0000000000150000-0x0000000000151000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/2688-213-0x000000000A570000-0x000000000A571000-memory.dmp

                                              Filesize

                                              4KB