Analysis
- max time kernel
150s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
22/03/2023, 18:45
General
- Target file.exe
- Size 360KB
- Sample230322-xd26ssce8t
- SHA256 d6b06f7b07cd71f55091d9d1c36556538dfe3fd8cd3b40bccd29d6ea123fb334
Malware Config
Extracted
-
smokeloader
-
pub4
Extracted
-
smokeloader
-
2022
-
http://aapu.at/tmp/
-
http://poudineh.com/tmp/
-
http://firsttrusteedrx.ru/tmp/
-
http://kingpirate.ru/tmp/
Signatures
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Blocklisted process makes network request 7 IoCs
- 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\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\E208.exeC:\Users\Admin\AppData\Local\Temp\E208.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Rpsoisahqrua.dll,start2⤵
- Blocklisted process makes network request
- Loads dropped DLL
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 4802⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4552 -ip 45521⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
E208.exe
E208.exe
Rpsoisahqrua.dll
Rpsoisahqrua.dll
memory/2648-136-0x0000000000400000-0x00000000004DA000-memory.dmp
memory/2648-134-0x0000000000660000-0x0000000000669000-memory.dmp
memory/3228-135-0x0000000003220000-0x0000000003236000-memory.dmp
memory/3380-160-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-159-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-166-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-153-0x0000000000880000-0x0000000000881000-memory.dmp
memory/3380-155-0x00000000008A0000-0x00000000008A1000-memory.dmp
memory/3380-156-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-157-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-165-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-164-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-162-0x0000000000400000-0x000000000086A000-memory.dmp
memory/3380-163-0x0000000000400000-0x000000000086A000-memory.dmp
memory/4552-147-0x0000000002AE0000-0x0000000002FE1000-memory.dmp
memory/4552-148-0x0000000000AC0000-0x0000000000AC1000-memory.dmp
memory/4552-152-0x0000000000400000-0x000000000090D000-memory.dmp