Analysis
- max time kernel
152s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
12/10/2022, 22:37
General
- Target a5bff0e953f87b927d2aea29460e7b58.exe
- Size 206KB
- Sample221012-2jslrsfdcn
- SHA256 ffd2dd34c696d7c8ee4385523a64fe4921aed62e24f30ca4cfdb4026bf5cdbe1
Malware Config
Signatures
- Detects Smokeloader packer 2 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 5 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 18 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\a5bff0e953f87b927d2aea29460e7b58.exe"C:\Users\Admin\AppData\Local\Temp\a5bff0e953f87b927d2aea29460e7b58.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\8410.exeC:\Users\Admin\AppData\Local\Temp\8410.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\86C0.exeC:\Users\Admin\AppData\Local\Temp\86C0.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\918F.exeC:\Users\Admin\AppData\Local\Temp\918F.exe1⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\0fd408e638\wfyoot.exe"C:\Users\Admin\AppData\Local\Temp\0fd408e638\wfyoot.exe"2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 1 /TN wfyoot.exe /TR "C:\Users\Admin\AppData\Local\Temp\0fd408e638\wfyoot.exe" /F3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 940 -s 11282⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 940 -ip 9401⤵
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C:\Users\Admin\AppData\Local\Temp\9F3C.exeC:\Users\Admin\AppData\Local\Temp\9F3C.exe1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
wfyoot.exe
wfyoot.exe
8410.exe
8410.exe
86C0.exe
86C0.exe
918F.exe
918F.exe
9F3C.exe
9F3C.exe
memory/684-154-0x0000000000400000-0x000000000045A000-memory.dmp
memory/684-153-0x000000000073E000-0x000000000075A000-memory.dmp
memory/940-147-0x000000000058E000-0x00000000005AB000-memory.dmp
memory/940-148-0x0000000002060000-0x0000000002097000-memory.dmp
memory/940-149-0x0000000000400000-0x000000000045A000-memory.dmp
memory/4908-137-0x0000000000400000-0x000000000047F000-memory.dmp
memory/4908-136-0x00000000005C0000-0x00000000005C9000-memory.dmp
memory/4908-135-0x000000000080E000-0x000000000081E000-memory.dmp
memory/4908-132-0x000000000080E000-0x000000000081E000-memory.dmp
memory/4908-134-0x0000000000400000-0x000000000047F000-memory.dmp
memory/4908-133-0x00000000005C0000-0x00000000005C9000-memory.dmp