Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/01/2023, 17:10

General

  • Target
    file.exe
  • Size 263KB
  • Sample230112-vppzhagh29
  • SHA256 f8fdee841dc8a4761cef23a6f3c6dfb054591412d486f5b100dab5ff7b772aa3
  • 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 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 4 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
  • Drops file in Program Files directory 2 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 27 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 30 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 19 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 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:2216
  • C:\Users\Admin\AppData\Local\Temp\C671.exe
    C:\Users\Admin\AppData\Local\Temp\C671.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp",Uuhpdwiyer
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook accounts
      • Accesses Microsoft Outlook profiles
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:216
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17209
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:380
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4800
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:2504
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
            3⤵
              PID:3364
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 532
            2⤵
            • Program crash
            PID:3664
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3968 -ip 3968
          1⤵
            PID:116
          • C:\Windows\System32\rundll32.exe
            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
            1⤵
              PID:4104
            • C:\Windows\SysWOW64\svchost.exe
              C:\Windows\SysWOW64\svchost.exe -k LocalService
              1⤵
                PID:2280
                • C:\Windows\SysWOW64\rundll32.exe
                  "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windows nt\tabletextservice\info.dll",GxEKTEJM
                  2⤵
                    PID:2624

                Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      info.dll

                      • Path C:\Program Files (x86)\Windows NT\TableTextService\info.dll
                      • Size 805KB
                      • SHA256 78f7e2f5db8c342b4f2262c742b468416b8081aace694ef34662bbc7e2158da1
                      • MD5 SHA1 SHA512 SSDEEP

                      info.dll

                      • Path C:\Program Files (x86)\Windows NT\TableTextService\info.dll
                      • Size 805KB
                      • SHA256 78f7e2f5db8c342b4f2262c742b468416b8081aace694ef34662bbc7e2158da1
                      • MD5 SHA1 SHA512 SSDEEP

                      Microsoft.BingWeather_4.25.20211.0_neutral_split.scale-150_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.BingWeather_4.25.20211.0_neutral_split.scale-150_8wekyb3d8bbwe.xml
                      • Size 849B
                      • SHA256 40d6a0b80770bf41ddc0a3b3607ac53eb82d0f90675e5a595a18cd3f8bdf3d94
                      • MD5 SHA1 SHA512

                      Microsoft.BingWeather_4.25.20211.0_neutral_~_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.BingWeather_4.25.20211.0_neutral_~_8wekyb3d8bbwe.xml
                      • Size 29KB
                      • SHA256 7117f778c590d79b5a434edaa09448f23332d1db26676db2c9463b0d2c2ddfb6
                      • MD5 SHA1 SHA512 SSDEEP

                      Microsoft.DesktopAppInstaller_2019.125.2243.0_neutral_~_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.DesktopAppInstaller_2019.125.2243.0_neutral_~_8wekyb3d8bbwe.xml
                      • Size 26KB
                      • SHA256 d8bd4c83debd08b1a21d24b3c4a445512ef1931717c01e113fbfc20f47157ea8
                      • MD5 SHA1 SHA512 SSDEEP

                      Microsoft.Getstarted_8.2.22942.0_neutral_split.scale-200_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.Getstarted_8.2.22942.0_neutral_split.scale-200_8wekyb3d8bbwe.xml
                      • Size 830B
                      • SHA256 225e46e9c3381e4935dc7c245ce3e3fec92d1a777b2af82c3aae05802d7420c7
                      • MD5 SHA1 SHA512

                      Microsoft.MixedReality.Portal_2000.19081.1301.0_neutral_split.scale-100_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.MixedReality.Portal_2000.19081.1301.0_neutral_split.scale-100_8wekyb3d8bbwe.xml
                      • Size 855B
                      • SHA256 5bae5febdf75a2fe0b73791d603c7c9ac5de0d00dffc909b5dbc86bcd6dd15f2
                      • MD5 SHA1 SHA512

                      Microsoft.People_10.1902.633.0_neutral_split.scale-100_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.People_10.1902.633.0_neutral_split.scale-100_8wekyb3d8bbwe.xml
                      • Size 829B
                      • SHA256 edc122dcf531bff5e772b1772cddc9a6d6e1166907c2c9e11d9125feed5f10a1
                      • MD5 SHA1 SHA512

                      MicrosoftOffice2013Office365Win64.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\MicrosoftOffice2013Office365Win64.xml
                      • Size 10KB
                      • SHA256 3fae1d780e8a63d73847dc38412952c238d0e3ca01a97caee718489a3d424893
                      • MD5 SHA1 SHA512 SSDEEP

                      Peqquspi.tmp

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Peqquspi.tmp
                      • Size 3.5MB
                      • SHA256 357384b78e1c981f5f77497fe125af888d11a0f4ff2e4e7a568fb62655d57cc8
                      • MD5 SHA1 SHA512 SSDEEP

                      overlay.png

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\overlay.png
                      • Size 28KB
                      • SHA256 5c5b0de42d55486ed61dd3a6e96ab09f467bb38ae39fced97adc51ba07426c0e
                      • MD5 SHA1 SHA512 SSDEEP

                      resource.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\resource.xml
                      • Size 1KB
                      • SHA256 af7a12135db48bf260cd6d7ce831810ef98ca05847c4b23086bc2e616e8b08f4
                      • MD5 SHA1 SHA512

                      user-192.png

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\user-192.png
                      • Size 2KB
                      • SHA256 7e9997f40d13b32c724ca4ecef283f377ce9965d31534167994e654d6e6623b6
                      • MD5 SHA1 SHA512

                      C671.exe

                      • Path C:\Users\Admin\AppData\Local\Temp\C671.exe
                      • Size 1.1MB
                      • SHA256 1b9931481e09cc30bbe27168bbd748b186da5ef8e840e2869a9839725f4ae58d
                      • MD5 SHA1 SHA512 SSDEEP

                      C671.exe

                      • Path C:\Users\Admin\AppData\Local\Temp\C671.exe
                      • Size 1.1MB
                      • SHA256 1b9931481e09cc30bbe27168bbd748b186da5ef8e840e2869a9839725f4ae58d
                      • MD5 SHA1 SHA512 SSDEEP

                      Rruwtqrefy.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp
                      • Size 805KB
                      • SHA256 c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0
                      • MD5 SHA1 SHA512 SSDEEP

                      Rruwtqrefy.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp
                      • Size 805KB
                      • SHA256 c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0
                      • MD5 SHA1 SHA512 SSDEEP

                      info.dll

                      • Path \??\c:\program files (x86)\windows nt\tabletextservice\info.dll
                      • Size 805KB
                      • SHA256 78f7e2f5db8c342b4f2262c742b468416b8081aace694ef34662bbc7e2158da1
                      • MD5 SHA1 SHA512 SSDEEP

                      memory/216-148-0x0000000005DB0000-0x0000000005EF0000-memory.dmp

                      memory/216-149-0x0000000005DB0000-0x0000000005EF0000-memory.dmp

                      memory/216-150-0x0000000005DB0000-0x0000000005EF0000-memory.dmp

                      memory/216-151-0x0000000005DB0000-0x0000000005EF0000-memory.dmp

                      memory/216-152-0x0000000005DB0000-0x0000000005EF0000-memory.dmp

                      memory/216-147-0x0000000005DB0000-0x0000000005EF0000-memory.dmp

                      memory/216-146-0x0000000005190000-0x0000000005CBF000-memory.dmp

                      memory/216-159-0x0000000005190000-0x0000000005CBF000-memory.dmp

                      memory/380-155-0x000001BD754F0000-0x000001BD75630000-memory.dmp

                      memory/380-156-0x00000000001A0000-0x0000000000438000-memory.dmp

                      memory/380-157-0x000001BD75650000-0x000001BD758F9000-memory.dmp

                      memory/380-154-0x000001BD754F0000-0x000001BD75630000-memory.dmp

                      memory/2216-135-0x0000000000400000-0x0000000002BA9000-memory.dmp

                      memory/2216-134-0x0000000000400000-0x0000000002BA9000-memory.dmp

                      memory/2216-132-0x0000000002D6D000-0x0000000002D7E000-memory.dmp

                      memory/2216-133-0x0000000002D40000-0x0000000002D49000-memory.dmp

                      memory/2280-164-0x0000000003A50000-0x000000000457F000-memory.dmp

                      memory/2280-175-0x0000000003A50000-0x000000000457F000-memory.dmp

                      memory/3968-144-0x0000000000400000-0x0000000002C7D000-memory.dmp

                      memory/3968-142-0x00000000049C2000-0x0000000004AA6000-memory.dmp

                      memory/3968-143-0x0000000004AB0000-0x0000000004BD4000-memory.dmp