Analysis

  • max time kernel
    144s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/01/2023, 23:21

General

  • Target
    file.exe
  • Size 193KB
  • Sample230119-3by91sef4x
  • SHA256 28f20c35c818d5d93bd818c41ceeaae59cda765d1954afd797a9d338ae959301
  • 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
  • Drops file in Program Files directory 16 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 22 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 18 IoCs
  • Suspicious use of FindShellTrayWindow 1 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:4920
  • C:\Users\Admin\AppData\Local\Temp\BDD6.exe
    C:\Users\Admin\AppData\Local\Temp\BDD6.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2196
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Thhqeqq.tmp",Yeytaeyds
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:1552
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 13810
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2328
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2196 -s 528
      2⤵
      • Program crash
      PID:4228
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 2196 -ip 2196
    1⤵
      PID:2700
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:1548
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe -k LocalService
        1⤵
          PID:3256
          • C:\Windows\SysWOW64\rundll32.exe
            "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\google\update\bib.dll",aRlQVjlJ
            2⤵
              PID:484

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                BIB.dll

                • Path C:\Program Files (x86)\Google\Update\BIB.dll
                • Size 762KB
                • SHA256 928da0cb6fbf96a3cc9c8c9253eb5d91fd7b5e3927d7181a58a087036dd87f9f
                • MD5 SHA1 SHA512 SSDEEP

                BIB.dll

                • Path C:\Program Files (x86)\Google\Update\BIB.dll
                • Size 762KB
                • SHA256 928da0cb6fbf96a3cc9c8c9253eb5d91fd7b5e3927d7181a58a087036dd87f9f
                • MD5 SHA1 SHA512 SSDEEP

                C2RManifest.Proof.Culture.msi.16.es-es.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\C2RManifest.Proof.Culture.msi.16.es-es.xml
                • Size 23KB
                • SHA256 5fba15e64d0ff7075951a8e6bf758d81d4c14fa98e6b8604d5bbc43317da8c01
                • MD5 SHA1 SHA512 SSDEEP

                E2A4F912-2574-4A75-9BB0-0D023378592B_10.0.19041.1023_neutral_neutral_cw5n1h2txyewy.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\E2A4F912-2574-4A75-9BB0-0D023378592B_10.0.19041.1023_neutral_neutral_cw5n1h2txyewy.xml
                • Size 2KB
                • SHA256 c8c2ac11232a448dd5d78c34752f56b8f5b8e18fe79b3176fdd88759d5b703d5
                • MD5 SHA1 SHA512

                Microsoft.MicrosoftEdge_44.19041.1266.0_neutral__8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\Microsoft.MicrosoftEdge_44.19041.1266.0_neutral__8wekyb3d8bbwe.xml
                • Size 24KB
                • SHA256 df14300ee7cae37c4264ca6b10a60e30f8f94cba7b0e6430576decbf031c4eaa
                • MD5 SHA1 SHA512 SSDEEP

                Microsoft.NET.Native.Runtime.2.2_2.2.27328.0_x64__8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\Microsoft.NET.Native.Runtime.2.2_2.2.27328.0_x64__8wekyb3d8bbwe.xml
                • Size 1KB
                • SHA256 d97e577008c9cf9baa9939be4babe4690e5f1e6ad1e97234b2f40ee22927d7fe
                • MD5 SHA1 SHA512

                MicrosoftLync2013Win64.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\MicrosoftLync2013Win64.xml
                • Size 2KB
                • SHA256 11031974100f363daebe2d5c9e4bf67418d662c73e0341eb71e10b91a33280ac
                • MD5 SHA1 SHA512

                MicrosoftOutlook2016CAWin64.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\MicrosoftOutlook2016CAWin64.xml
                • Size 1KB
                • SHA256 5f45e2be37f33052a97235462325f5ae32d3713bdaa6eeeea49e92f0e9fc6ed0
                • MD5 SHA1 SHA512

                Tqeowahqrywaui.tmp

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\Tqeowahqrywaui.tmp
                • Size 3.5MB
                • SHA256 7ab0c37dd7c003b3fa3db88fdffd396d8428bb1a2539a5848f007402a6cef19e
                • MD5 SHA1 SHA512 SSDEEP

                BDD6.exe

                • Path C:\Users\Admin\AppData\Local\Temp\BDD6.exe
                • Size 1.0MB
                • SHA256 d3c7e752caf186b3a9f469efcd668f9e1beb4310f9eac5dcbc48aaea1698e11a
                • MD5 SHA1 SHA512 SSDEEP

                BDD6.exe

                • Path C:\Users\Admin\AppData\Local\Temp\BDD6.exe
                • Size 1.0MB
                • SHA256 d3c7e752caf186b3a9f469efcd668f9e1beb4310f9eac5dcbc48aaea1698e11a
                • MD5 SHA1 SHA512 SSDEEP

                Thhqeqq.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Thhqeqq.tmp
                • Size 762KB
                • SHA256 fdafcea4a906ec7204c7b6991ca6c9640c9a54f1679bc1df6684f6716cef56ef
                • MD5 SHA1 SHA512 SSDEEP

                Thhqeqq.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Thhqeqq.tmp
                • Size 762KB
                • SHA256 fdafcea4a906ec7204c7b6991ca6c9640c9a54f1679bc1df6684f6716cef56ef
                • MD5 SHA1 SHA512 SSDEEP

                bib.dll

                • Path \??\c:\program files (x86)\google\update\bib.dll
                • Size 762KB
                • SHA256 928da0cb6fbf96a3cc9c8c9253eb5d91fd7b5e3927d7181a58a087036dd87f9f
                • MD5 SHA1 SHA512 SSDEEP

                memory/484-175-0x0000000004E70000-0x00000000059EC000-memory.dmp

                memory/1552-160-0x0000000006240000-0x0000000006DBC000-memory.dmp

                memory/1552-150-0x0000000004730000-0x0000000004870000-memory.dmp

                memory/1552-151-0x0000000004730000-0x0000000004870000-memory.dmp

                memory/1552-152-0x0000000004730000-0x0000000004870000-memory.dmp

                memory/1552-153-0x0000000004730000-0x0000000004870000-memory.dmp

                memory/1552-146-0x0000000006240000-0x0000000006DBC000-memory.dmp

                memory/1552-147-0x0000000006240000-0x0000000006DBC000-memory.dmp

                memory/1552-148-0x0000000004730000-0x0000000004870000-memory.dmp

                memory/1552-157-0x00000000047A9000-0x00000000047AB000-memory.dmp

                memory/1552-149-0x0000000004730000-0x0000000004870000-memory.dmp

                memory/2196-143-0x0000000000400000-0x0000000002C6C000-memory.dmp

                memory/2196-145-0x0000000000400000-0x0000000002C6C000-memory.dmp

                memory/2196-139-0x00000000048B7000-0x000000000499B000-memory.dmp

                memory/2196-140-0x0000000004AA0000-0x0000000004BC6000-memory.dmp

                memory/2328-155-0x0000015881850000-0x0000015881990000-memory.dmp

                memory/2328-156-0x0000015881850000-0x0000015881990000-memory.dmp

                memory/2328-159-0x0000015880000000-0x00000158802B0000-memory.dmp

                memory/2328-158-0x00000000009B0000-0x0000000000C4F000-memory.dmp

                memory/3256-164-0x0000000004350000-0x0000000004ECC000-memory.dmp

                memory/3256-173-0x0000000004350000-0x0000000004ECC000-memory.dmp

                memory/4920-132-0x0000000002CFD000-0x0000000002D10000-memory.dmp

                memory/4920-135-0x0000000000400000-0x0000000002B9A000-memory.dmp

                memory/4920-134-0x0000000000400000-0x0000000002B9A000-memory.dmp

                memory/4920-133-0x0000000002C20000-0x0000000002C29000-memory.dmp