Analysis

  • max time kernel
    152s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/11/2022, 19:26

General

  • Target
    93385a74fc808e3b7d978c021956dd31.exe
  • Size 292KB
  • Sample221104-x5hapscbel
  • SHA256 19633da847079d57f96c20babc5462365c83a6f33db7a4399ea532b301ee2f67
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 3 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 43 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 19 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 23 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\93385a74fc808e3b7d978c021956dd31.exe
    "C:\Users\Admin\AppData\Local\Temp\93385a74fc808e3b7d978c021956dd31.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:2440
  • C:\Users\Admin\AppData\Local\Temp\5BDB.exe
    C:\Users\Admin\AppData\Local\Temp\5BDB.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1396
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1396 -s 816
      2⤵
      • Program crash
      PID:1004
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1396 -s 816
      2⤵
      • Program crash
      PID:3164
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3100
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 30830
        3⤵
          PID:4320
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1396 -s 888
        2⤵
        • Program crash
        PID:636
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1396 -ip 1396
      1⤵
        PID:440
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1396 -ip 1396
        1⤵
          PID:4780
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1396 -ip 1396
          1⤵
            PID:964

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                02fc4909-db62-4fee-8646-109dbf6b271b.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\02fc4909-db62-4fee-8646-109dbf6b271b.tmp
                • Size 21KB
                • SHA256 7f4e382d1c6724a5f173f3617e35d5ad74c28ffce9a918f00b48c88f978dc34e
                • MD5 SHA1 SHA512 SSDEEP

                185a0208-d15a-42cc-a6bd-26fded261d7b.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\185a0208-d15a-42cc-a6bd-26fded261d7b.tmp
                • Size 22KB
                • SHA256 d6f11c606729d553e9c9b3d0db9e5d51567ea969bedd98008cce7b9415a17490
                • MD5 SHA1 SHA512 SSDEEP

                5BDB.exe

                • Path C:\Users\Admin\AppData\Local\Temp\5BDB.exe
                • Size 4.9MB
                • SHA256 a89e9d77c3da116fa19821acf9e6ac4f78f9e8ec0a57f67f407aa29cc334eabf
                • MD5 SHA1 SHA512 SSDEEP

                5BDB.exe

                • Path C:\Users\Admin\AppData\Local\Temp\5BDB.exe
                • Size 4.9MB
                • SHA256 a89e9d77c3da116fa19821acf9e6ac4f78f9e8ec0a57f67f407aa29cc334eabf
                • MD5 SHA1 SHA512 SSDEEP

                Microsoft .NET Framework 4.7.2 Setup_20220812_194409742.html

                • Path C:\Users\Admin\AppData\Local\Temp\Microsoft .NET Framework 4.7.2 Setup_20220812_194409742.html
                • Size 93KB
                • SHA256 62bfa55487dface1cb7989308d91488315e79714153a4e40e1c14d4ca7a4a1c2
                • MD5 SHA1 SHA512 SSDEEP

                Rpiidpytrto.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Rpiidpytrto.tmp
                • Size 3.5MB
                • SHA256 8c67a70fe070595fda6ec977af7da0085d40df299f04cdd5669156752fee3f31
                • MD5 SHA1 SHA512 SSDEEP

                jawshtml.html

                • Path C:\Users\Admin\AppData\Local\Temp\jawshtml.html
                • Size 13B
                • SHA256 7b4f72a40bd21934680f085afe8a30bf85acff1a8365af43102025c4ccf52b73
                • MD5 SHA1 SHA512

                jusched.log

                • Path C:\Users\Admin\AppData\Local\Temp\jusched.log
                • Size 266KB
                • SHA256 196626328a25c36cff2d8aceb59a8add1afcc3ec1d0e2e4e7e1fa31620758d1b
                • MD5 SHA1 SHA512 SSDEEP

                wct5E8C.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\wct5E8C.tmp
                • Size 62KB
                • SHA256 094754a618b102b7ad0800dd4c9c02c882cf2d1e7996ba864f422fa4312427e1
                • MD5 SHA1 SHA512 SSDEEP

                wct7D63.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\wct7D63.tmp
                • Size 62KB
                • SHA256 094754a618b102b7ad0800dd4c9c02c882cf2d1e7996ba864f422fa4312427e1
                • MD5 SHA1 SHA512 SSDEEP

                memory/1396-143-0x0000000005E50000-0x00000000069B9000-memory.dmp

                memory/1396-150-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-144-0x0000000005E50000-0x00000000069B9000-memory.dmp

                memory/1396-145-0x0000000005E50000-0x00000000069B9000-memory.dmp

                memory/1396-146-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-147-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-148-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-149-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-151-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-142-0x0000000000400000-0x00000000030CE000-memory.dmp

                memory/1396-152-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-172-0x0000000005E50000-0x00000000069B9000-memory.dmp

                memory/1396-153-0x0000000006B80000-0x0000000006CC0000-memory.dmp

                memory/1396-155-0x0000000000400000-0x00000000030CE000-memory.dmp

                memory/1396-139-0x0000000004D84000-0x000000000522E000-memory.dmp

                memory/1396-140-0x0000000005230000-0x0000000005885000-memory.dmp

                memory/1396-141-0x0000000000400000-0x00000000030CE000-memory.dmp

                memory/2440-133-0x0000000002E90000-0x0000000002E99000-memory.dmp

                memory/2440-135-0x0000000000400000-0x0000000002C37000-memory.dmp

                memory/2440-132-0x0000000002F58000-0x0000000002F6E000-memory.dmp

                memory/2440-134-0x0000000000400000-0x0000000002C37000-memory.dmp

                memory/3100-156-0x0000000002FF0000-0x0000000003B59000-memory.dmp

                memory/3100-159-0x0000000002FF0000-0x0000000003B59000-memory.dmp

                memory/3100-157-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-158-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-168-0x0000000000A20000-0x000000000146A000-memory.dmp

                memory/3100-169-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-170-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-171-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-173-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-174-0x0000000003B60000-0x0000000003CA0000-memory.dmp

                memory/3100-175-0x0000000002FF0000-0x0000000003B59000-memory.dmp