Analysis

  • max time kernel
    151s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/11/2022, 20:38

General

  • Target
    file.exe
  • Size 188KB
  • Sample221124-zep9qsbh4w
  • SHA256 2cb95b7d309f60e6f3c3db63d2a1347ce949271d5d0ca216e89e926de7026322
  • 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
  • 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 6 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 2 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:4872
  • C:\Users\Admin\AppData\Local\Temp\5BEB.exe
    C:\Users\Admin\AppData\Local\Temp\5BEB.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4752
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Tdryuqayh.tmp",Worhdhqfpryr
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:544
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 20161
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2988
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 556
      2⤵
      • Program crash
      PID:732
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4752 -ip 4752
    1⤵
      PID:4328
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3156
      • C:\Users\Admin\AppData\Roaming\cigejjs
        C:\Users\Admin\AppData\Roaming\cigejjs
        1⤵
        • Executes dropped EXE
        • Checks SCSI registry key(s)
        • Suspicious behavior: MapViewOfSection
        PID:1552

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            5BEB.exe

            • Path C:\Users\Admin\AppData\Local\Temp\5BEB.exe
            • Size 1017KB
            • SHA256 c46c40bf67a73dde44a2747a40dcb27782a813815e6a537a8c8bb3d80d4d7fb7
            • MD5 SHA1 SHA512 SSDEEP

            5BEB.exe

            • Path C:\Users\Admin\AppData\Local\Temp\5BEB.exe
            • Size 1017KB
            • SHA256 c46c40bf67a73dde44a2747a40dcb27782a813815e6a537a8c8bb3d80d4d7fb7
            • MD5 SHA1 SHA512 SSDEEP

            Tdryuqayh.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Tdryuqayh.tmp
            • Size 767KB
            • SHA256 3d63ad175a34e4c89ea6eca4a1161bb5dd514a5e58302707edc03473eb1f656e
            • MD5 SHA1 SHA512 SSDEEP

            Tdryuqayh.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Tdryuqayh.tmp
            • Size 767KB
            • SHA256 3d63ad175a34e4c89ea6eca4a1161bb5dd514a5e58302707edc03473eb1f656e
            • MD5 SHA1 SHA512 SSDEEP

            cigejjs

            • Path C:\Users\Admin\AppData\Roaming\cigejjs
            • Size 188KB
            • SHA256 2cb95b7d309f60e6f3c3db63d2a1347ce949271d5d0ca216e89e926de7026322
            • MD5 SHA1 SHA512 SSDEEP

            cigejjs

            • Path C:\Users\Admin\AppData\Roaming\cigejjs
            • Size 188KB
            • SHA256 2cb95b7d309f60e6f3c3db63d2a1347ce949271d5d0ca216e89e926de7026322
            • MD5 SHA1 SHA512 SSDEEP

            memory/544-148-0x0000000005290000-0x00000000053D0000-memory.dmp

            memory/544-152-0x0000000005309000-0x000000000530B000-memory.dmp

            memory/544-159-0x00000000058F0000-0x0000000006469000-memory.dmp

            memory/544-153-0x0000000005290000-0x00000000053D0000-memory.dmp

            memory/544-151-0x0000000005290000-0x00000000053D0000-memory.dmp

            memory/544-150-0x0000000005290000-0x00000000053D0000-memory.dmp

            memory/544-145-0x00000000058F0000-0x0000000006469000-memory.dmp

            memory/544-146-0x00000000058F0000-0x0000000006469000-memory.dmp

            memory/544-147-0x0000000005290000-0x00000000053D0000-memory.dmp

            memory/544-149-0x0000000005290000-0x00000000053D0000-memory.dmp

            memory/1552-162-0x00000000008FD000-0x000000000090D000-memory.dmp

            memory/1552-164-0x0000000000400000-0x000000000064C000-memory.dmp

            memory/1552-163-0x0000000000400000-0x000000000064C000-memory.dmp

            memory/2988-157-0x0000000000E90000-0x000000000113B000-memory.dmp

            memory/2988-155-0x000001FE5BCC0000-0x000001FE5BE00000-memory.dmp

            memory/2988-156-0x000001FE5BCC0000-0x000001FE5BE00000-memory.dmp

            memory/2988-158-0x000001FE5A260000-0x000001FE5A51C000-memory.dmp

            memory/4752-142-0x00000000023C3000-0x00000000024A2000-memory.dmp

            memory/4752-143-0x00000000024B0000-0x00000000025D0000-memory.dmp

            memory/4752-144-0x0000000000400000-0x000000000071B000-memory.dmp

            memory/4872-135-0x0000000000400000-0x000000000064C000-memory.dmp

            memory/4872-132-0x00000000007AD000-0x00000000007BD000-memory.dmp

            memory/4872-134-0x0000000000400000-0x000000000064C000-memory.dmp

            memory/4872-133-0x0000000002240000-0x0000000002249000-memory.dmp