Analysis

  • max time kernel
    151s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/12/2022, 10:31

General

  • Target
    file.exe
  • Size 250KB
  • Sample221230-mkc55sfd69
  • SHA256 9756d646cb166f9726e6f2ddcaaca9dd5d73cb1c5df38b40f8b86b94d265389c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 3 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 47 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 27 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:5100
  • C:\Users\Admin\AppData\Local\Temp\5285.exe
    C:\Users\Admin\AppData\Local\Temp\5285.exe
    1⤵
    • Executes dropped EXE
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:4628
    • C:\Users\Admin\AppData\Local\Temp\Sppyteaet.exe
      "C:\Users\Admin\AppData\Local\Temp\Sppyteaet.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:3388
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      PID:2640
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2640 -s 1344
        3⤵
        • Program crash
        PID:484
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4628 -s 1156
      2⤵
      • Program crash
      PID:1948
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --no-first-run --no-default-browser-check --silent-launch --disable-backgrounding-occluded-windows --disable-background-timer-throttling --ran-launcher --profile-directory="Default"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Enumerates system info in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4768
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=89.0.4389.114 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ffb6df44f50,0x7ffb6df44f60,0x7ffb6df44f70
      2⤵
        PID:4756
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1636,4240911135685592887,15631384442182321344,131072 --lang=en-US --service-sandbox-type=network --mojo-platform-channel-handle=2012 /prefetch:8
        2⤵
          PID:4980
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1636,4240911135685592887,15631384442182321344,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1656 /prefetch:2
          2⤵
            PID:3128
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1636,4240911135685592887,15631384442182321344,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2280 /prefetch:8
            2⤵
              PID:4824
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1636,4240911135685592887,15631384442182321344,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3548 /prefetch:8
              2⤵
                PID:2220
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1636,4240911135685592887,15631384442182321344,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3568 /prefetch:8
                2⤵
                  PID:4660
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 4768 -s 3588
                  2⤵
                  • Program crash
                  PID:4636
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2640 -ip 2640
                1⤵
                  PID:4112
                • C:\Windows\System32\CompPkgSrv.exe
                  C:\Windows\System32\CompPkgSrv.exe -Embedding
                  1⤵
                    PID:3956
                  • C:\Windows\system32\WerFault.exe
                    C:\Windows\system32\WerFault.exe -pss -s 528 -p 4768 -ip 4768
                    1⤵
                      PID:5064
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4628 -ip 4628
                      1⤵
                        PID:4480

                      Network

                            MITRE ATT&CK Enterprise v6

                            Replay Monitor

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                            Downloads

                            5285.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\5285.exe
                            • Size 5.5MB
                            • SHA256 6f5d20c53ad290b668b80f4561c165d10cc963c47655e8f8090003f074d35ff4
                            • MD5 SHA1 SHA512 SSDEEP

                            5285.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\5285.exe
                            • Size 5.5MB
                            • SHA256 6f5d20c53ad290b668b80f4561c165d10cc963c47655e8f8090003f074d35ff4
                            • MD5 SHA1 SHA512 SSDEEP

                            Sppyteaet.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\Sppyteaet.exe
                            • Size 1.3MB
                            • SHA256 366ee3319c995b995fcfcc3f2228a18a09d0461a94964b4b4ad9a89dcbf669f4
                            • MD5 SHA1 SHA512 SSDEEP

                            Sppyteaet.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\Sppyteaet.exe
                            • Size 1.3MB
                            • SHA256 366ee3319c995b995fcfcc3f2228a18a09d0461a94964b4b4ad9a89dcbf669f4
                            • MD5 SHA1 SHA512 SSDEEP

                            memory/1028-179-0x00000000082F0000-0x0000000008418000-memory.dmp

                            memory/1028-164-0x00000000082F0000-0x0000000008418000-memory.dmp

                            memory/1028-155-0x00000000082F0000-0x0000000008418000-memory.dmp

                            memory/2640-168-0x00000000012E0000-0x0000000001D05000-memory.dmp

                            memory/2640-176-0x0000000003850000-0x0000000004394000-memory.dmp

                            memory/2640-174-0x00000000043B0000-0x00000000044F0000-memory.dmp

                            memory/2640-173-0x00000000043B0000-0x00000000044F0000-memory.dmp

                            memory/2640-172-0x00000000043B0000-0x00000000044F0000-memory.dmp

                            memory/2640-171-0x00000000043B0000-0x00000000044F0000-memory.dmp

                            memory/2640-170-0x0000000003850000-0x0000000004394000-memory.dmp

                            memory/2640-169-0x0000000003850000-0x0000000004394000-memory.dmp

                            memory/3388-153-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/3388-152-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/3388-154-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/3388-145-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/3388-149-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/3388-150-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/3388-151-0x0000000000400000-0x0000000000534000-memory.dmp

                            memory/4628-140-0x0000000002C40000-0x00000000031F3000-memory.dmp

                            memory/4628-157-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-162-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-163-0x0000000007140000-0x0000000007C84000-memory.dmp

                            memory/4628-165-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-166-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-160-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-180-0x0000000000400000-0x00000000009B4000-memory.dmp

                            memory/4628-178-0x0000000007140000-0x0000000007C84000-memory.dmp

                            memory/4628-159-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-158-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-161-0x0000000007F40000-0x0000000008080000-memory.dmp

                            memory/4628-156-0x0000000007140000-0x0000000007C84000-memory.dmp

                            memory/4628-139-0x00000000026D0000-0x0000000002C31000-memory.dmp

                            memory/4628-141-0x0000000000400000-0x00000000009B4000-memory.dmp

                            memory/4628-177-0x0000000000400000-0x00000000009B4000-memory.dmp

                            memory/5100-134-0x0000000000400000-0x0000000000463000-memory.dmp

                            memory/5100-132-0x0000000000749000-0x000000000075A000-memory.dmp

                            memory/5100-133-0x0000000000700000-0x0000000000709000-memory.dmp

                            memory/5100-135-0x0000000000400000-0x0000000000463000-memory.dmp