Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/01/2023, 00:11

General

  • Target
    file.exe
  • Size 264KB
  • Sample230113-agla5aca67
  • SHA256 5d2df40ae44fd1ad54cc934db6ad71a2eb519ed55af279a26d983f2d6555a7b5
  • 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
  • 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 12 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 18 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:4760
  • C:\Users\Admin\AppData\Local\Temp\F4C5.exe
    C:\Users\Admin\AppData\Local\Temp\F4C5.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3428
    • 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
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:3184
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17179
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4636
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3428 -s 564
      2⤵
      • Program crash
      PID:3628
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3428 -ip 3428
    1⤵
      PID:4104
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:728
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe -k LocalService
        1⤵
          PID:1668
          • C:\Windows\SysWOW64\rundll32.exe
            "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windows nt\tabletextservice\bib.dll",WSI3
            2⤵
              PID:4068

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                BIB.dll

                • Path C:\Program Files (x86)\Windows NT\TableTextService\BIB.dll
                • Size 805KB
                • SHA256 42acb88c12f99a9c218d2594ecfb80c41aecfe2f7389f1905f0e7390b3fa7cca
                • MD5 SHA1 SHA512 SSDEEP

                BIB.dll

                • Path C:\Program Files (x86)\Windows NT\TableTextService\BIB.dll
                • Size 805KB
                • SHA256 42acb88c12f99a9c218d2594ecfb80c41aecfe2f7389f1905f0e7390b3fa7cca
                • MD5 SHA1 SHA512 SSDEEP

                DiagnosticLogCSP_Collector_DeviceProvisioning_2022_11_11_13_34_6.etl

                • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\DiagnosticLogCSP_Collector_DeviceProvisioning_2022_11_11_13_34_6.etl
                • Size 256KB
                • SHA256 0cb5476c09391a9aa162dab319070f54ad3befb8cb202acfd274613985912aea
                • MD5 SHA1 SHA512 SSDEEP

                Microsoft.MicrosoftEdgeDevToolsClient_1000.19041.1023.0_neutral_neutral_8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.MicrosoftEdgeDevToolsClient_1000.19041.1023.0_neutral_neutral_8wekyb3d8bbwe.xml
                • Size 1KB
                • SHA256 9727e4d3cf3fcc5dcc364cd990f41a4be98d227b0ce975fa97cef0ef8eaa5b78
                • MD5 SHA1 SHA512

                Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe.xml
                • Size 8KB
                • SHA256 8e5dd7465c39d653c1ba79e4b154321413b4f3dd7b62f485848a5122fbb868b6
                • MD5 SHA1 SHA512 SSDEEP

                MicrosoftEdgeUpdate.log

                • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\MicrosoftEdgeUpdate.log
                • Size 103KB
                • SHA256 d786b67ba29815370580be2c6eccd29adc09a1095a38d7ceff3279f6ab68a325
                • MD5 SHA1 SHA512 SSDEEP

                Peqquspi.tmp

                • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Peqquspi.tmp
                • Size 3.5MB
                • SHA256 e7f90d241a57476773387534cf06238caa48725d45ded48d85734f582f2d08ec
                • MD5 SHA1 SHA512 SSDEEP

                s641033.hash

                • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\s641033.hash
                • Size 106B
                • SHA256 2621f92f43d06d28d28c0bf72909ea4da8232cdee0704e84c2b1310075f5890a
                • MD5 SHA1 SHA512

                F4C5.exe

                • Path C:\Users\Admin\AppData\Local\Temp\F4C5.exe
                • Size 1.1MB
                • SHA256 44d0d7a26b261812c9980b03239fd15fffd5b5eb5422e5779be1e253d09237e4
                • MD5 SHA1 SHA512 SSDEEP

                F4C5.exe

                • Path C:\Users\Admin\AppData\Local\Temp\F4C5.exe
                • Size 1.1MB
                • SHA256 44d0d7a26b261812c9980b03239fd15fffd5b5eb5422e5779be1e253d09237e4
                • 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

                bib.dll

                • Path \??\c:\program files (x86)\windows nt\tabletextservice\bib.dll
                • Size 805KB
                • SHA256 42acb88c12f99a9c218d2594ecfb80c41aecfe2f7389f1905f0e7390b3fa7cca
                • MD5 SHA1 SHA512 SSDEEP

                memory/1668-172-0x0000000003F60000-0x0000000004A8F000-memory.dmp

                memory/1668-164-0x0000000003F60000-0x0000000004A8F000-memory.dmp

                memory/3184-159-0x0000000004C80000-0x00000000057AF000-memory.dmp

                memory/3184-149-0x0000000005970000-0x0000000005AB0000-memory.dmp

                memory/3184-150-0x0000000005970000-0x0000000005AB0000-memory.dmp

                memory/3184-151-0x0000000005970000-0x0000000005AB0000-memory.dmp

                memory/3184-152-0x0000000005970000-0x0000000005AB0000-memory.dmp

                memory/3184-147-0x0000000005970000-0x0000000005AB0000-memory.dmp

                memory/3184-148-0x0000000005970000-0x0000000005AB0000-memory.dmp

                memory/3184-155-0x00000000059E9000-0x00000000059EB000-memory.dmp

                memory/3184-146-0x0000000004C80000-0x00000000057AF000-memory.dmp

                memory/3428-145-0x0000000000400000-0x0000000002C7E000-memory.dmp

                memory/3428-143-0x00000000048B9000-0x000000000499D000-memory.dmp

                memory/3428-144-0x00000000049A0000-0x0000000004AC4000-memory.dmp

                memory/4068-173-0x0000000004D60000-0x000000000588F000-memory.dmp

                memory/4068-174-0x0000000004D60000-0x000000000588F000-memory.dmp

                memory/4636-154-0x000001D6E53A0000-0x000001D6E54E0000-memory.dmp

                memory/4636-160-0x000001D6E3950000-0x000001D6E3BF9000-memory.dmp

                memory/4636-158-0x000001D6E3950000-0x000001D6E3BF9000-memory.dmp

                memory/4636-156-0x000001D6E53A0000-0x000001D6E54E0000-memory.dmp

                memory/4636-157-0x0000000000620000-0x00000000008B8000-memory.dmp

                memory/4760-133-0x00000000048E0000-0x00000000048E9000-memory.dmp

                memory/4760-136-0x0000000000400000-0x0000000002BAA000-memory.dmp

                memory/4760-135-0x0000000002E0D000-0x0000000002E1E000-memory.dmp

                memory/4760-134-0x0000000000400000-0x0000000002BAA000-memory.dmp

                memory/4760-132-0x0000000002E0D000-0x0000000002E1E000-memory.dmp