Analysis
- max time kernel
100s - max time network
107s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
20/02/2024, 18:05
General
- Target setup_installer.exe
- Size 1.5MB
- Sample240220-wpjcdsdc35
- SHA256 b14218cb639c6afa35a66cf418035ce10475b53f5386896a44327fd48d8447c8
Malware Config
Extracted
-
nullmixer
-
http://wxkeww.xyz/
Extracted
-
smokeloader
-
pub6
Extracted
-
smokeloader
-
2020
-
http://conceitosseg.com/upload/
-
http://integrasidata.com/upload/
-
http://ozentekstil.com/upload/
-
http://finbelportal.com/upload/
-
http://telanganadigital.com/upload/
Signatures
- Modifies Windows Defender Real-time Protection settings 3 TTPs 7 IoCs
- NullMixer
NullMixer is a malware dropper leading to an infection chain of a wide variety of malware families.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- ASPack v2.12-2.42 6 IoCs
Detects executables packed with ASPack v2.12-2.42
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 7 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 15 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\setup_installer.exe"C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\7zSCDD53D27\setup_install.exe"C:\Users\Admin\AppData\Local\Temp\7zSCDD53D27\setup_install.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c karotima_1.exe3⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\7zSCDD53D27\karotima_1.exekarotima_1.exe4⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
-
-
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c karotima_2.exe3⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\7zSCDD53D27\karotima_2.exekarotima_2.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2508 -s 5243⤵
- Program crash
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2508 -ip 25081⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
karotima_1.txt
karotima_2.txt
libcurl.dll
libcurlpp.dll
libgcc_s_dw2-1.dll
libstdc++-6.dll
libstdc++-6.dll
libwinpthread-1.dll
libwinpthread-1.dll
setup_install.exe
CC4F.tmp
memory/2508-48-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/2508-49-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/2508-41-0x0000000064940000-0x0000000064959000-memory.dmp
memory/2508-39-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/2508-40-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/2508-44-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/2508-45-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/2508-46-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/2508-47-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/2508-36-0x0000000000F10000-0x0000000000F9F000-memory.dmp
memory/2508-51-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-50-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-53-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-52-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-42-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/2508-54-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-37-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/2508-32-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/2508-60-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2508-61-0x000000006B280000-0x000000006B2A6000-memory.dmp
memory/2508-62-0x0000000064940000-0x0000000064959000-memory.dmp
memory/2508-63-0x000000006EB40000-0x000000006EB63000-memory.dmp
memory/2508-72-0x0000000000F10000-0x0000000000F9F000-memory.dmp
memory/2508-70-0x000000006B440000-0x000000006B4CF000-memory.dmp
memory/2508-64-0x000000006FE40000-0x000000006FFC6000-memory.dmp
memory/2508-22-0x0000000000400000-0x000000000051E000-memory.dmp
memory/3172-71-0x0000000002CD0000-0x0000000002CD9000-memory.dmp
memory/3172-66-0x0000000002E50000-0x0000000002F50000-memory.dmp
memory/3172-73-0x0000000000400000-0x0000000002B7B000-memory.dmp
memory/3172-76-0x0000000000400000-0x0000000002B7B000-memory.dmp
memory/3248-74-0x00000000028E0000-0x00000000028F5000-memory.dmp