Analysis
- max time kernel
152s - max time network
142s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
11/10/2022, 07:08
General
- Target da3c5e5fcab7da1eff36118243392b99.exe
- Size 274KB
- Sample221011-hx74tsbfer
- SHA256 4f6c62edaefbf759cdb1c848ecac90ed248501be5876d0a62c90a86322ff14b4
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 8 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 2 IoCs
- Checks SCSI registry key(s) 3 TTPs 6 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 20 IoCs
- Suspicious use of AdjustPrivilegeToken 46 IoCs
- Suspicious use of WriteProcessMemory 54 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\da3c5e5fcab7da1eff36118243392b99.exe"C:\Users\Admin\AppData\Local\Temp\da3c5e5fcab7da1eff36118243392b99.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\B44C.exeC:\Users\Admin\AppData\Local\Temp\B44C.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\B74B.exeC:\Users\Admin\AppData\Local\Temp\B74B.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\BA88.exeC:\Users\Admin\AppData\Local\Temp\BA88.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\C595.exeC:\Users\Admin\AppData\Local\Temp\C595.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 5012 -s 8962⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\C920.exeC:\Users\Admin\AppData\Local\Temp\C920.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 5012 -ip 50121⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Users\Admin\AppData\Local\Temp\0fd408e638\wfyoot.exeC:\Users\Admin\AppData\Local\Temp\0fd408e638\wfyoot.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2792 -s 3122⤵
- Program crash
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C:\Users\Admin\AppData\Roaming\ttjhhihC:\Users\Admin\AppData\Roaming\ttjhhih1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2792 -ip 27921⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
wfyoot.exe
wfyoot.exe
wfyoot.exe
B44C.exe
B44C.exe
B74B.exe
B74B.exe
BA88.exe
BA88.exe
C595.exe
C595.exe
C920.exe
C920.exe
ttjhhih
ttjhhih
memory/944-167-0x0000000001100000-0x0000000001105000-memory.dmp
memory/944-192-0x0000000001100000-0x0000000001105000-memory.dmp
memory/944-168-0x00000000010F0000-0x00000000010F9000-memory.dmp
memory/1264-184-0x0000000000700000-0x0000000000707000-memory.dmp
memory/1264-196-0x0000000000700000-0x0000000000707000-memory.dmp
memory/1264-185-0x00000000006F0000-0x00000000006FD000-memory.dmp
memory/1280-175-0x0000000000D60000-0x0000000000D82000-memory.dmp
memory/1280-193-0x0000000000D60000-0x0000000000D82000-memory.dmp
memory/1280-176-0x0000000000D30000-0x0000000000D57000-memory.dmp
memory/1704-165-0x000000000083C000-0x0000000000858000-memory.dmp
memory/1704-191-0x000000000083C000-0x0000000000858000-memory.dmp
memory/1704-166-0x0000000000400000-0x000000000059E000-memory.dmp
memory/2084-205-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2084-204-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2084-203-0x00000000005E7000-0x00000000005F7000-memory.dmp
memory/2332-194-0x0000000000470000-0x0000000000475000-memory.dmp
memory/2332-179-0x0000000000460000-0x0000000000469000-memory.dmp
memory/2332-178-0x0000000000470000-0x0000000000475000-memory.dmp
memory/2596-195-0x00000000012C0000-0x00000000012C6000-memory.dmp
memory/2596-182-0x00000000012B0000-0x00000000012BB000-memory.dmp
memory/2596-181-0x00000000012C0000-0x00000000012C6000-memory.dmp
memory/2792-202-0x0000000000400000-0x000000000059E000-memory.dmp
memory/2792-201-0x0000000000960000-0x000000000097C000-memory.dmp
memory/2976-197-0x00000000010E0000-0x00000000010E8000-memory.dmp
memory/2976-188-0x00000000010D0000-0x00000000010DB000-memory.dmp
memory/2976-187-0x00000000010E0000-0x00000000010E8000-memory.dmp
memory/3268-160-0x0000000000900000-0x000000000090B000-memory.dmp
memory/3268-189-0x0000000000910000-0x0000000000917000-memory.dmp
memory/3268-159-0x0000000000910000-0x0000000000917000-memory.dmp
memory/3460-171-0x0000000000430000-0x000000000043C000-memory.dmp
memory/3460-170-0x0000000000440000-0x0000000000446000-memory.dmp
memory/4232-133-0x0000000000590000-0x0000000000599000-memory.dmp
memory/4232-134-0x0000000000400000-0x000000000044A000-memory.dmp
memory/4232-135-0x0000000000400000-0x000000000044A000-memory.dmp
memory/4232-132-0x0000000000777000-0x0000000000787000-memory.dmp
memory/4572-162-0x00000000009B0000-0x00000000009BF000-memory.dmp
memory/4572-161-0x00000000009C0000-0x00000000009C9000-memory.dmp
memory/4572-190-0x00000000009C0000-0x00000000009C9000-memory.dmp
memory/5012-173-0x0000000000400000-0x000000000059E000-memory.dmp
memory/5012-153-0x0000000000400000-0x000000000059E000-memory.dmp
memory/5012-152-0x00000000006E0000-0x0000000000717000-memory.dmp
memory/5012-151-0x000000000090E000-0x000000000092A000-memory.dmp
memory/5012-172-0x000000000090E000-0x000000000092A000-memory.dmp