Analysis
- max time kernel
140s - max time network
135s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
03/01/2024, 09:45
General
- Target ef06ab5cd57598acc6b4222249dbe5b4.exe
- Size 1.5MB
- Sample240103-lrd6caceej
- SHA256 3675ddb9d16e43fd54dd441f57a0aa0c20ae7b6a85b81f2b867c753c3503934f
Malware Config
Extracted
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nullmixer
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http://marisana.xyz/
Extracted
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smokeloader
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pub6
Extracted
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smokeloader
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2020
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http://conceitosseg.com/upload/
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http://integrasidata.com/upload/
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http://ozentekstil.com/upload/
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http://finbelportal.com/upload/
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http://telanganadigital.com/upload/
Signatures
- Modifies Windows Defender Real-time Protection settings 3 TTPs 7 IoCs
- NullMixer
NullMixer is a malware dropper leading to an infection chain of a wide variety of malware families.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- ASPack v2.12-2.42 1 IoCs
Detects executables packed with ASPack v2.12-2.42
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 4 IoCs
- Loads dropped DLL 7 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 2 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of UnmapMainImage 1 IoCs
- Suspicious use of WriteProcessMemory 18 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\ef06ab5cd57598acc6b4222249dbe5b4.exe"C:\Users\Admin\AppData\Local\Temp\ef06ab5cd57598acc6b4222249dbe5b4.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\7zS00D46807\setup_install.exe"C:\Users\Admin\AppData\Local\Temp\7zS00D46807\setup_install.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3796 -s 4244⤵
- Program crash
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c karotima_2.exe1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\7zS00D46807\karotima_2.exekarotima_2.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1272 -s 3443⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\7zS00D46807\karotima_1.exekarotima_1.exe1⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c karotima_1.exe1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1272 -ip 12721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3796 -ip 37961⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
setup_installer.exe
setup_installer.exe
setup_installer.exe
memory/1272-77-0x0000000000400000-0x00000000008A5000-memory.dmp
memory/1272-81-0x0000000000400000-0x00000000008A5000-memory.dmp
memory/1272-72-0x00000000009E0000-0x0000000000AE0000-memory.dmp
memory/1272-73-0x0000000000930000-0x0000000000939000-memory.dmp
memory/3340-78-0x0000000002A40000-0x0000000002A55000-memory.dmp
memory/3796-63-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-61-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-59-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/3796-58-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/3796-57-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/3796-56-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/3796-54-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/3796-53-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/3796-52-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/3796-50-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/3796-49-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/3796-48-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/3796-46-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/3796-60-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-64-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-65-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-62-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-55-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/3796-51-0x0000000064940000-0x0000000064959000-memory.dmp
memory/3796-34-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3796-87-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/3796-86-0x000000006EB40000-0x000000006EB63000-memory.dmp
memory/3796-85-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/3796-84-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/3796-83-0x0000000064940000-0x0000000064959000-memory.dmp
memory/3796-82-0x0000000000400000-0x000000000051E000-memory.dmp