Analysis
- max time kernel
150s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
25/01/2023, 06:31
General
- Target file.exe
- Size 336KB
- Sample230125-g92l5sfa92
- SHA256 a3aea103b419665bacda87f8752ab1ebde31ef6b692a5ddaaf08122487deed2d
Malware Config
Signatures
- Detects Smokeloader packer 2 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 6 IoCs
- VMProtect packed file 6 IoCs
Detects executables packed with VMProtect commercial packer.
- Checks computer location settings 2 TTPs 1 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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 16 IoCs
Processes
-
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\4BED.exeC:\Users\Admin\AppData\Local\Temp\4BED.exe1⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn "svcupdater" /tr "C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe" /st 00:00 /du 9999:59 /sc once /ri 1 /f2⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1432 -s 10282⤵
- Program crash
-
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C:\Users\Admin\AppData\Local\Temp\4E7F.exeC:\Users\Admin\AppData\Local\Temp\4E7F.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3904 -s 3402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\4F4B.exeC:\Users\Admin\AppData\Local\Temp\4F4B.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\54F9.exeC:\Users\Admin\AppData\Local\Temp\54F9.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\5BFF.exeC:\Users\Admin\AppData\Local\Temp\5BFF.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3904 -ip 39041⤵
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1432 -ip 14321⤵
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C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exeC:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
4BED.exe
4BED.exe
4E7F.exe
4E7F.exe
4F4B.exe
4F4B.exe
54F9.exe
54F9.exe
5BFF.exe
5BFF.exe
svcupdater.exe
svcupdater.exe
memory/1432-161-0x0000000001FA0000-0x0000000001FE7000-memory.dmp
memory/1432-170-0x0000000000400000-0x000000000046D000-memory.dmp
memory/1432-162-0x0000000000400000-0x000000000046D000-memory.dmp
memory/1432-160-0x0000000000470000-0x0000000000570000-memory.dmp
memory/1660-156-0x0000000140000000-0x0000000140623000-memory.dmp
memory/2848-168-0x0000000000400000-0x0000000002B96000-memory.dmp
memory/2848-164-0x0000000002DF0000-0x0000000002DF9000-memory.dmp
memory/2848-165-0x0000000000400000-0x0000000002B96000-memory.dmp
memory/2848-163-0x0000000002E2D000-0x0000000002E3F000-memory.dmp
memory/3904-166-0x0000000000400000-0x000000000045B000-memory.dmp
memory/3904-167-0x000000000065D000-0x0000000000672000-memory.dmp
memory/4140-149-0x0000000140000000-0x0000000140623000-memory.dmp
memory/4588-173-0x000000000057C000-0x00000000005A6000-memory.dmp
memory/4588-174-0x0000000000400000-0x000000000046D000-memory.dmp
memory/4772-132-0x00000000005ED000-0x0000000000603000-memory.dmp
memory/4772-133-0x00000000005B0000-0x00000000005B9000-memory.dmp
memory/4772-134-0x0000000000400000-0x000000000045C000-memory.dmp
memory/4772-135-0x0000000000400000-0x000000000045C000-memory.dmp