Analysis

  • max time kernel
    148s
  • 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
    11/01/2023, 00:52

General

  • Target
    file.exe
  • Size 267KB
  • Sample230111-a73cbsab45
  • SHA256 d9eb354ca1e313b29368d6a9a86f9451f8effb50cff8d077c41eecc5f6d91f16
  • 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 2 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 cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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 2 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 17 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 20 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 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:1336
  • C:\Users\Admin\AppData\Local\Temp\CDF3.exe
    C:\Users\Admin\AppData\Local\Temp\CDF3.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3812
    • 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
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4020
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23783
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4864
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3812 -s 544
      2⤵
      • Program crash
      PID:4888
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3812 -ip 3812
    1⤵
      PID:4216
    • C:\Users\Admin\AppData\Local\Temp\5F.exe
      C:\Users\Admin\AppData\Local\Temp\5F.exe
      1⤵
      • Executes dropped EXE
      PID:2664
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2664 -s 1304
        2⤵
        • Program crash
        PID:2016
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2664 -ip 2664
      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:2168
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\SysWOW64\svchost.exe -k LocalService
          1⤵
            PID:4648

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                5F.exe

                • Path C:\Users\Admin\AppData\Local\Temp\5F.exe
                • Size 305KB
                • SHA256 a1f83bcb5ea2f442ea87e3b08a4670c692ef26ebcfc29763cfdcfbdd06d824ee
                • MD5 SHA1 SHA512 SSDEEP

                5F.exe

                • Path C:\Users\Admin\AppData\Local\Temp\5F.exe
                • Size 305KB
                • SHA256 a1f83bcb5ea2f442ea87e3b08a4670c692ef26ebcfc29763cfdcfbdd06d824ee
                • MD5 SHA1 SHA512 SSDEEP

                CDF3.exe

                • Path C:\Users\Admin\AppData\Local\Temp\CDF3.exe
                • Size 1.1MB
                • SHA256 de986adf6658e8c6f617278104ad96b3a6cf25d86a2b945b5b1608dc283a6d2b
                • MD5 SHA1 SHA512 SSDEEP

                CDF3.exe

                • Path C:\Users\Admin\AppData\Local\Temp\CDF3.exe
                • Size 1.1MB
                • SHA256 de986adf6658e8c6f617278104ad96b3a6cf25d86a2b945b5b1608dc283a6d2b
                • 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

                memory/1336-133-0x00000000048E0000-0x00000000048E9000-memory.dmp

                memory/1336-134-0x0000000000400000-0x0000000002BAB000-memory.dmp

                memory/1336-135-0x0000000000400000-0x0000000002BAB000-memory.dmp

                memory/1336-132-0x0000000002C1D000-0x0000000002C2D000-memory.dmp

                memory/2664-150-0x0000000002C40000-0x0000000002C6A000-memory.dmp

                memory/2664-157-0x0000000000400000-0x0000000002BB4000-memory.dmp

                memory/2664-149-0x0000000002C8E000-0x0000000002CA8000-memory.dmp

                memory/2664-156-0x0000000002C8E000-0x0000000002CA8000-memory.dmp

                memory/2664-152-0x0000000000400000-0x0000000002BB4000-memory.dmp

                memory/3812-143-0x00000000049B0000-0x0000000004AD0000-memory.dmp

                memory/3812-144-0x0000000000400000-0x0000000002C7C000-memory.dmp

                memory/3812-142-0x00000000048C1000-0x00000000049A2000-memory.dmp

                memory/3812-148-0x0000000000400000-0x0000000002C7C000-memory.dmp

                memory/4020-155-0x00000000046D0000-0x0000000004810000-memory.dmp

                memory/4020-160-0x00000000046D0000-0x0000000004810000-memory.dmp

                memory/4020-153-0x0000000006210000-0x0000000006D6B000-memory.dmp

                memory/4020-151-0x0000000006210000-0x0000000006D6B000-memory.dmp

                memory/4020-158-0x00000000046D0000-0x0000000004810000-memory.dmp

                memory/4020-159-0x00000000046D0000-0x0000000004810000-memory.dmp

                memory/4020-154-0x00000000046D0000-0x0000000004810000-memory.dmp

                memory/4020-161-0x00000000046D0000-0x0000000004810000-memory.dmp

                memory/4020-168-0x0000000006210000-0x0000000006D6B000-memory.dmp

                memory/4020-165-0x0000000004749000-0x000000000474B000-memory.dmp

                memory/4864-164-0x000001315F6F0000-0x000001315F830000-memory.dmp

                memory/4864-163-0x000001315F6F0000-0x000001315F830000-memory.dmp

                memory/4864-166-0x0000000000420000-0x00000000006CA000-memory.dmp

                memory/4864-167-0x000001315F870000-0x000001315FB2B000-memory.dmp