Analysis

  • max time kernel
    151s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/01/2023, 16:54

General

  • Target
    file.exe
  • Size 213KB
  • Sample230105-vejdzacf29
  • SHA256 f04fbfcb6c3dc95153ecb44d83d1ddb80de24f52f1f74c0b26cdfc78514dba00
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • 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 SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 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 26 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 31 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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:4372
  • C:\Users\Admin\AppData\Local\Temp\F1D7.exe
    C:\Users\Admin\AppData\Local\Temp\F1D7.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4944
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Pyupydeoe.tmp",Uprsprhaot
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23975
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4984
      • C:\Users\Admin\AppData\Local\Temp\c16a1422.exe
        C:\Users\Admin\AppData\Local\Temp\c16a1422.exe
        3⤵
          PID:4500
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4944 -s 528
        2⤵
        • Program crash
        PID:4028
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4944 -ip 4944
      1⤵
        PID:4176
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:2500
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\SysWOW64\svchost.exe -k LocalService
          1⤵
            PID:4692
            • C:\Windows\SysWOW64\rundll32.exe
              "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windowspowershell\modules\adobelinguistic.dll",CQMGc1RuYUc=
              2⤵
                PID:4732
            • C:\Windows\system32\svchost.exe
              C:\Windows\system32\svchost.exe -k netsvcs -p -s seclogon
              1⤵
                PID:1412

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    AdobeLinguistic.dll

                    • Path C:\Program Files (x86)\WindowsPowerShell\Modules\AdobeLinguistic.dll
                    • Size 784KB
                    • SHA256 51b0cc190a3b07c13cf2271692ca1b78d6275b9c77c3d23c0671b8bb60cd8094
                    • MD5 SHA1 SHA512 SSDEEP

                    AdobeLinguistic.dll

                    • Path C:\Program Files (x86)\WindowsPowerShell\Modules\AdobeLinguistic.dll
                    • Size 384KB
                    • SHA256 43d732a8141c12c9872a2140d9e8262d904ef65cf766c5d771d539ac007d1eba
                    • MD5 SHA1 SHA512 SSDEEP

                    C2RManifest.OSMUX.OSMUX.x-none.msi.16.x-none.xml

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\C2RManifest.OSMUX.OSMUX.x-none.msi.16.x-none.xml
                    • Size 2KB
                    • SHA256 838e2cd11573dfcbb74c47621b30c5a7b62b2a063a41282a8e117b7b8fd5ebbc
                    • MD5 SHA1 SHA512

                    DiagnosticLogCSP_Collector_DeviceProvisioning_2022_11_11_13_34_40.etl

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\DiagnosticLogCSP_Collector_DeviceProvisioning_2022_11_11_13_34_40.etl
                    • Size 256KB
                    • SHA256 26cf983a78b3aee8b55f4f5dfb5a7ac24185feb354a005f3f27d2f295581764e
                    • MD5 SHA1 SHA512 SSDEEP

                    Microsoft.ScreenSketch_10.1907.2471.0_neutral_split.scale-100_8wekyb3d8bbwe.xml

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\Microsoft.ScreenSketch_10.1907.2471.0_neutral_split.scale-100_8wekyb3d8bbwe.xml
                    • Size 839B
                    • SHA256 6893a54cc402ac94a278294c20918a5a6d15f8bf11995a8b2388dbe9fce5b966
                    • MD5 SHA1 SHA512

                    Oreqhqoupyrw.tmp

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\Oreqhqoupyrw.tmp
                    • Size 3.5MB
                    • SHA256 ae96c901d373cc9123483d85dccf986c0d38891602e20999d241a21e08cff12c
                    • MD5 SHA1 SHA512 SSDEEP

                    background.png

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\background.png
                    • Size 126KB
                    • SHA256 d3e8d47e8c1622ec10adef672ca7a8992748c4f0a4e75f877462e7e661069698
                    • MD5 SHA1 SHA512 SSDEEP

                    resource.xml

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\resource.xml
                    • Size 1KB
                    • SHA256 50ce5d2f9497955246143e7bb7d7584f221c15574a910c7cc11af87537711d25
                    • MD5 SHA1 SHA512

                    utc.tracing.json

                    • Path C:\ProgramData\{E6FB8490-097E-1893-E5D7-72BBB5B030D6}\utc.tracing.json
                    • Size 41B
                    • SHA256 65961d7a83a876885a76d0afba18b9d4e516f784faea0fa8aa3cd800adec26ac
                    • MD5 SHA1 SHA512

                    F1D7.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\F1D7.exe
                    • Size 1013KB
                    • SHA256 fcdc00b6a7b07ff7d78d289e1995e819041bcae13fa2a42395d35040e5183238
                    • MD5 SHA1 SHA512 SSDEEP

                    F1D7.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\F1D7.exe
                    • Size 1013KB
                    • SHA256 fcdc00b6a7b07ff7d78d289e1995e819041bcae13fa2a42395d35040e5183238
                    • MD5 SHA1 SHA512 SSDEEP

                    Pyupydeoe.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\Pyupydeoe.tmp
                    • Size 784KB
                    • SHA256 20dc61c5456ea5756f432aebecf74660acebf5ace0f7c8d1b360757ed79075d8
                    • MD5 SHA1 SHA512 SSDEEP

                    Pyupydeoe.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\Pyupydeoe.tmp
                    • Size 784KB
                    • SHA256 20dc61c5456ea5756f432aebecf74660acebf5ace0f7c8d1b360757ed79075d8
                    • MD5 SHA1 SHA512 SSDEEP

                    adobelinguistic.dll

                    • Path \??\c:\program files (x86)\windowspowershell\modules\adobelinguistic.dll
                    • Size 784KB
                    • SHA256 51b0cc190a3b07c13cf2271692ca1b78d6275b9c77c3d23c0671b8bb60cd8094
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/2028-152-0x00000000047C0000-0x0000000004900000-memory.dmp

                    memory/2028-156-0x0000000004839000-0x000000000483B000-memory.dmp

                    memory/2028-148-0x00000000047C0000-0x0000000004900000-memory.dmp

                    memory/2028-149-0x00000000047C0000-0x0000000004900000-memory.dmp

                    memory/2028-150-0x00000000047C0000-0x0000000004900000-memory.dmp

                    memory/2028-151-0x00000000047C0000-0x0000000004900000-memory.dmp

                    memory/2028-146-0x00000000065A0000-0x00000000070F2000-memory.dmp

                    memory/2028-153-0x00000000047C0000-0x0000000004900000-memory.dmp

                    memory/2028-147-0x00000000065A0000-0x00000000070F2000-memory.dmp

                    memory/2028-160-0x00000000065A0000-0x00000000070F2000-memory.dmp

                    memory/4372-134-0x0000000000400000-0x0000000002B9D000-memory.dmp

                    memory/4372-135-0x0000000000400000-0x0000000002B9D000-memory.dmp

                    memory/4372-133-0x00000000048D0000-0x00000000048D9000-memory.dmp

                    memory/4372-132-0x0000000002D09000-0x0000000002D1A000-memory.dmp

                    memory/4692-164-0x0000000003F90000-0x0000000004AE2000-memory.dmp

                    memory/4692-165-0x0000000003F90000-0x0000000004AE2000-memory.dmp

                    memory/4944-144-0x0000000000400000-0x0000000002C65000-memory.dmp

                    memory/4944-143-0x0000000004A40000-0x0000000004B52000-memory.dmp

                    memory/4944-142-0x0000000004962000-0x0000000004A3A000-memory.dmp

                    memory/4944-145-0x0000000000400000-0x0000000002C65000-memory.dmp

                    memory/4984-155-0x000002585C230000-0x000002585C370000-memory.dmp

                    memory/4984-159-0x000002585A7E0000-0x000002585AA8C000-memory.dmp

                    memory/4984-158-0x0000000000410000-0x00000000006AB000-memory.dmp

                    memory/4984-157-0x000002585C230000-0x000002585C370000-memory.dmp