Analysis

  • max time kernel
    147s
  • max time network
    150s
  • 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, 03:00

General

  • Target
    file.exe
  • Size 321KB
  • Sample230112-dhbpvsfa44
  • SHA256 ff9bcbe4a1dcfdb1bd6647cf1ddb13881adb72891452929feeb9ff0e941b4313
  • 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
  • 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 25 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 21 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:3048
  • C:\Users\Admin\AppData\Local\Temp\BF8C.exe
    C:\Users\Admin\AppData\Local\Temp\BF8C.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1476
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp",Edoqqdswdffqipe
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook accounts
      • Accesses Microsoft Outlook profiles
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:4768
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23789
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2964
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:1216
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:2804
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 564
          2⤵
          • Program crash
          PID:3340
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1476 -ip 1476
        1⤵
          PID:1364
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:1312
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\SysWOW64\svchost.exe -k LocalService
            1⤵
              PID:4236
              • C:\Windows\SysWOW64\rundll32.exe
                "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windowspowershell\modules\ccloud_retina.dll",Lg4gNHgyUA==
                2⤵
                  PID:3336

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    ccloud_retina.dll

                    • Path C:\Program Files (x86)\WindowsPowerShell\Modules\ccloud_retina.dll
                    • Size 752KB
                    • SHA256 138bd7b9e1fddda319da6a9d2c6354c029aebb97011f21d0a44b1c57c821205f
                    • MD5 SHA1 SHA512 SSDEEP

                    ccloud_retina.dll

                    • Path C:\Program Files (x86)\WindowsPowerShell\Modules\ccloud_retina.dll
                    • Size 752KB
                    • SHA256 138bd7b9e1fddda319da6a9d2c6354c029aebb97011f21d0a44b1c57c821205f
                    • MD5 SHA1 SHA512 SSDEEP

                    Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe.xml

                    • Path C:\ProgramData\{B6600257-EE8E-BC17-51D3-445AF22F69ED}\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe.xml
                    • Size 9KB
                    • SHA256 bb39de067132d2ccbb7a3c066743010f070a3c3856f42ccc892da0b40012771e
                    • MD5 SHA1 SHA512 SSDEEP

                    Microsoft.MicrosoftOfficeHub_18.1903.1152.0_neutral_~_8wekyb3d8bbwe.xml

                    • Path C:\ProgramData\{B6600257-EE8E-BC17-51D3-445AF22F69ED}\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_neutral_~_8wekyb3d8bbwe.xml
                    • Size 34KB
                    • SHA256 e9be748ed4a3c102ea57b0a8f437768ce2a2f626d4cdfa5f0e1c4b96dd688a49
                    • MD5 SHA1 SHA512 SSDEEP

                    MicrosoftSkypeForBusiness2016Win64.xml

                    • Path C:\ProgramData\{B6600257-EE8E-BC17-51D3-445AF22F69ED}\MicrosoftSkypeForBusiness2016Win64.xml
                    • Size 2KB
                    • SHA256 40ad82a3af39ac5ecca299f7d0c57a8de41c75c96e2c0fa49c0dcb5b442f14cf
                    • MD5 SHA1 SHA512

                    Twesqary.tmp

                    • Path C:\ProgramData\{B6600257-EE8E-BC17-51D3-445AF22F69ED}\Twesqary.tmp
                    • Size 3.5MB
                    • SHA256 8d9508ff23654606ed0f92d920f264ce6b9fd326576c121a30e2860b1578e935
                    • MD5 SHA1 SHA512 SSDEEP

                    setup.ini

                    • Path C:\ProgramData\{B6600257-EE8E-BC17-51D3-445AF22F69ED}\setup.ini
                    • Size 214B
                    • SHA256 00b5526d5cffb22eb22eb663fd3863c3f287c5bfc951f1d45cdd0cf0b25c2301
                    • MD5 SHA1 SHA512

                    BF8C.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\BF8C.exe
                    • Size 1.1MB
                    • SHA256 67b4ba32ea235352c931e41a1aa26927225a9a9919649c56bde80b9ae251bdd4
                    • MD5 SHA1 SHA512 SSDEEP

                    BF8C.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\BF8C.exe
                    • Size 1.1MB
                    • SHA256 67b4ba32ea235352c931e41a1aa26927225a9a9919649c56bde80b9ae251bdd4
                    • MD5 SHA1 SHA512 SSDEEP

                    Qytyaworpiotpd.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
                    • Size 752KB
                    • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
                    • MD5 SHA1 SHA512 SSDEEP

                    Qytyaworpiotpd.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
                    • Size 752KB
                    • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
                    • MD5 SHA1 SHA512 SSDEEP

                    ccloud_retina.dll

                    • Path \??\c:\program files (x86)\windowspowershell\modules\ccloud_retina.dll
                    • Size 752KB
                    • SHA256 138bd7b9e1fddda319da6a9d2c6354c029aebb97011f21d0a44b1c57c821205f
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/1476-144-0x0000000000400000-0x0000000000523000-memory.dmp

                    memory/1476-143-0x0000000002330000-0x0000000002450000-memory.dmp

                    memory/1476-142-0x00000000020D6000-0x00000000021B7000-memory.dmp

                    memory/2964-154-0x0000019BFFEB0000-0x0000019BFFFF0000-memory.dmp

                    memory/2964-155-0x0000019BFFEB0000-0x0000019BFFFF0000-memory.dmp

                    memory/2964-158-0x0000000000910000-0x0000000000BBA000-memory.dmp

                    memory/2964-159-0x0000019BFFBF0000-0x0000019BFFEAB000-memory.dmp

                    memory/3048-132-0x000000000072E000-0x0000000000743000-memory.dmp

                    memory/3048-133-0x00000000006F0000-0x00000000006F9000-memory.dmp

                    memory/3048-134-0x0000000000400000-0x0000000000456000-memory.dmp

                    memory/3048-135-0x0000000000400000-0x0000000000456000-memory.dmp

                    memory/4236-168-0x00000000043C0000-0x0000000004F1B000-memory.dmp

                    memory/4768-146-0x0000000004D50000-0x00000000058AB000-memory.dmp

                    memory/4768-152-0x00000000046F0000-0x0000000004830000-memory.dmp

                    memory/4768-163-0x0000000007023000-0x0000000007025000-memory.dmp

                    memory/4768-164-0x0000000006FE5000-0x0000000006FE7000-memory.dmp

                    memory/4768-148-0x00000000046F0000-0x0000000004830000-memory.dmp

                    memory/4768-147-0x00000000046F0000-0x0000000004830000-memory.dmp

                    memory/4768-145-0x0000000004D50000-0x00000000058AB000-memory.dmp

                    memory/4768-161-0x0000000004D50000-0x00000000058AB000-memory.dmp

                    memory/4768-149-0x0000000006F30000-0x0000000007070000-memory.dmp

                    memory/4768-156-0x0000000007023000-0x0000000007025000-memory.dmp

                    memory/4768-157-0x0000000006FE5000-0x0000000006FE7000-memory.dmp

                    memory/4768-150-0x0000000006F30000-0x0000000007070000-memory.dmp

                    memory/4768-151-0x00000000046F0000-0x0000000004830000-memory.dmp