Analysis
- max time kernel
156s - max time network
159s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
22/01/2023, 16:13
General
- Target file.exe
- Size 195KB
- Sample230122-tn3njaac7z
- SHA256 dd14921b8274f08aebcfe6d02359191fec130e13feffbde9b4cb88f9810bc10b
Malware Config
Signatures
- Detects Smokeloader packer 2 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Blocklisted process makes network request 1 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Accesses Microsoft Outlook profiles 1 TTPs 4 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
- 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 25 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 11 IoCs
- Suspicious use of FindShellTrayWindow 9 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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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
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C:\Users\Admin\AppData\Local\Temp\1388.exeC:\Users\Admin\AppData\Local\Temp\1388.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll,start2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Accesses Microsoft Outlook accounts
- Accesses Microsoft Outlook profiles
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 225933⤵
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 4196 -s 5044⤵
- Program crash
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C:\Windows\SysWOW64\schtasks.exeschtasks /End /tn \Microsoft\Windows\Wininet\CacheTask3⤵
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C:\Windows\SysWOW64\schtasks.exeschtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask3⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4588 -s 4802⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4588 -ip 45881⤵
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -pss -s 520 -p 4196 -ip 41961⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
1388.exe
1388.exe
Athusdiuuhasd.dll
Athusdiuuhasd.dll
Athusdiuuhasd.dll
memory/1052-133-0x0000000002CB0000-0x0000000002CB9000-memory.dmp
memory/1052-137-0x0000000000400000-0x0000000002B9B000-memory.dmp
memory/1052-135-0x0000000002CFB000-0x0000000002D0E000-memory.dmp
memory/1052-134-0x0000000000400000-0x0000000002B9B000-memory.dmp
memory/1052-136-0x0000000002CB0000-0x0000000002CB9000-memory.dmp
memory/1052-132-0x0000000002CFB000-0x0000000002D0E000-memory.dmp
memory/2108-151-0x00000000020B0000-0x000000000251E000-memory.dmp
memory/2108-159-0x0000000003FB0000-0x00000000040F0000-memory.dmp
memory/2108-164-0x0000000003FB0000-0x00000000040F0000-memory.dmp
memory/2108-162-0x0000000003FB0000-0x00000000040F0000-memory.dmp
memory/2108-161-0x0000000003FB0000-0x00000000040F0000-memory.dmp
memory/2108-160-0x0000000003390000-0x0000000003EEA000-memory.dmp
memory/2108-155-0x0000000003390000-0x0000000003EEA000-memory.dmp
memory/2108-157-0x0000000003FB0000-0x00000000040F0000-memory.dmp
memory/2108-158-0x0000000003FB0000-0x00000000040F0000-memory.dmp
memory/2108-153-0x00000000020B0000-0x000000000251E000-memory.dmp
memory/2108-154-0x0000000003390000-0x0000000003EEA000-memory.dmp
memory/2108-150-0x00000000020B0000-0x000000000251E000-memory.dmp
memory/2108-156-0x0000000003390000-0x0000000003EEA000-memory.dmp
memory/4196-166-0x000001502C490000-0x000001502C5D0000-memory.dmp
memory/4196-167-0x000001502CCC0000-0x000001502CE00000-memory.dmp
memory/4196-170-0x000001502CA10000-0x000001502CCB3000-memory.dmp
memory/4196-165-0x000001502C490000-0x000001502C5D0000-memory.dmp
memory/4196-169-0x000001502C1E0000-0x000001502C483000-memory.dmp
memory/4196-168-0x00000000006C0000-0x0000000000951000-memory.dmp
memory/4588-142-0x0000000004FE0000-0x00000000054D0000-memory.dmp
memory/4588-152-0x0000000000400000-0x0000000002F19000-memory.dmp
memory/4588-145-0x0000000000400000-0x0000000002F19000-memory.dmp
memory/4588-144-0x0000000004FE0000-0x00000000054D0000-memory.dmp
memory/4588-143-0x0000000000400000-0x0000000002F19000-memory.dmp
memory/4588-141-0x0000000004C4A000-0x0000000004FDB000-memory.dmp