Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/01/2023, 10:26

General

  • Target
    file.exe
  • Size 318KB
  • Sample230107-mghlfsdc82
  • SHA256 aebfdf05c9d08439cc5eb3714503a69d1f463d970782d71fb48b6bf37111ae79
  • 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 25 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 23 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:3724
  • C:\Users\Admin\AppData\Local\Temp\ED24.exe
    C:\Users\Admin\AppData\Local\Temp\ED24.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4064
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp",Iyidwoiowsw
      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:4268
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 15605
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4596
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4064 -s 528
      2⤵
      • Program crash
      PID:1856
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4064 -ip 4064
    1⤵
      PID:836
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:2592

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            ED24.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ED24.exe
            • Size 1.1MB
            • SHA256 88a881fea5323fa6b6dc147c64e8efc8bd2ae4379541d2cdd6f38d2f3b0a6a99
            • MD5 SHA1 SHA512 SSDEEP

            ED24.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ED24.exe
            • Size 1.1MB
            • SHA256 88a881fea5323fa6b6dc147c64e8efc8bd2ae4379541d2cdd6f38d2f3b0a6a99
            • MD5 SHA1 SHA512 SSDEEP

            Wtfoiq.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp
            • Size 714KB
            • SHA256 d0ac0e9021c6e231c60256198309b7f72ce4c5e772cf343b5456c2ce0664b9bd
            • MD5 SHA1 SHA512 SSDEEP

            Wtfoiq.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp
            • Size 714KB
            • SHA256 d0ac0e9021c6e231c60256198309b7f72ce4c5e772cf343b5456c2ce0664b9bd
            • MD5 SHA1 SHA512 SSDEEP

            memory/3724-135-0x0000000000400000-0x0000000003013000-memory.dmp

            memory/3724-134-0x0000000000400000-0x0000000003013000-memory.dmp

            memory/3724-132-0x00000000031DD000-0x00000000031F3000-memory.dmp

            memory/3724-133-0x0000000003170000-0x0000000003179000-memory.dmp

            memory/4064-145-0x0000000000400000-0x00000000030D2000-memory.dmp

            memory/4064-142-0x0000000004E9E000-0x0000000004F72000-memory.dmp

            memory/4064-143-0x0000000004F80000-0x0000000005095000-memory.dmp

            memory/4064-144-0x0000000000400000-0x00000000030D2000-memory.dmp

            memory/4268-146-0x00000000055B0000-0x00000000060F1000-memory.dmp

            memory/4268-152-0x0000000004FB0000-0x00000000050F0000-memory.dmp

            memory/4268-147-0x00000000055B0000-0x00000000060F1000-memory.dmp

            memory/4268-148-0x0000000004FB0000-0x00000000050F0000-memory.dmp

            memory/4268-149-0x0000000004FB0000-0x00000000050F0000-memory.dmp

            memory/4268-150-0x0000000004FB0000-0x00000000050F0000-memory.dmp

            memory/4268-151-0x0000000004FB0000-0x00000000050F0000-memory.dmp

            memory/4268-153-0x0000000004FB0000-0x00000000050F0000-memory.dmp

            memory/4268-160-0x00000000055B0000-0x00000000060F1000-memory.dmp

            memory/4268-157-0x0000000005029000-0x000000000502B000-memory.dmp

            memory/4596-156-0x0000017B3BFF0000-0x0000017B3C130000-memory.dmp

            memory/4596-155-0x0000017B3BFF0000-0x0000017B3C130000-memory.dmp

            memory/4596-158-0x0000000000280000-0x0000000000521000-memory.dmp

            memory/4596-159-0x0000017B3A720000-0x0000017B3A9D2000-memory.dmp