Analysis
- max time kernel
150s - max time network
103s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
21/02/2023, 02:10
General
- Target 101345f206a311b2f8e5d2dbe5deaead.exe
- Size 212KB
- Sample230221-clpkfsfb6v
- SHA256 3af1fc031ddbed621380b99ea34ea261e5e5b79a4cfb918898bad80f1f6822c5
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Program crash 1 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: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 6 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
-
C:\Users\Admin\AppData\Local\Temp\101345f206a311b2f8e5d2dbe5deaead.exe"C:\Users\Admin\AppData\Local\Temp\101345f206a311b2f8e5d2dbe5deaead.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\66B9.exeC:\Users\Admin\AppData\Local\Temp\66B9.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Ruifriwreh.dll,start2⤵
- Loads dropped DLL
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 772 -s 5082⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 772 -ip 7721⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
66B9.exe
66B9.exe
Ruifriwreh.dll
Ruifriwreh.dll
memory/772-147-0x00000000029B0000-0x0000000002E9A000-memory.dmp
memory/772-156-0x0000000000400000-0x00000000008F6000-memory.dmp
memory/772-148-0x0000000002530000-0x0000000002531000-memory.dmp
memory/772-149-0x0000000000400000-0x00000000008F6000-memory.dmp
memory/772-150-0x0000000000400000-0x00000000008F6000-memory.dmp
memory/772-151-0x0000000000400000-0x00000000008F6000-memory.dmp
memory/804-157-0x0000000000400000-0x0000000000855000-memory.dmp
memory/804-155-0x0000000000F00000-0x0000000000F01000-memory.dmp
memory/804-158-0x0000000000400000-0x0000000000855000-memory.dmp
memory/804-160-0x0000000000400000-0x0000000000855000-memory.dmp
memory/804-161-0x0000000000400000-0x0000000000855000-memory.dmp
memory/804-163-0x0000000000400000-0x0000000000855000-memory.dmp
memory/804-164-0x0000000000400000-0x0000000000855000-memory.dmp
memory/3140-135-0x0000000001510000-0x0000000001526000-memory.dmp
memory/4892-136-0x0000000000400000-0x000000000056A000-memory.dmp
memory/4892-134-0x00000000007C0000-0x00000000007C9000-memory.dmp