smokeloader | 74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc

System Information Discovery

Processes:

2A6C.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	2A6C.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	2A6C.exe

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

28D5.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 28D5.exe
Loads dropped DLL 2 IoCs

Processes:

2A6C.exe

pid process

5048 2A6C.exe
5048 2A6C.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

2A6C.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 2A6C.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

2A6C.exe

pid process

5048 2A6C.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

4588 4140 WerFault.exe 28D5.exe
2424 5048 WerFault.exe 2A6C.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	28D5.exe

pid	process
5048	2A6C.exe
5048	2A6C.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	2A6C.exe

pid	process
5048	2A6C.exe

pid	pid_target	process	target process
4588	4140	WerFault.exe	28D5.exe
2424	5048	WerFault.exe	2A6C.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

Processes:

74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe

description	ioc	process
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

2A6C.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	2A6C.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2A6C.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1108 schtasks.exe

pid	process
1108	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe

pid	process
4972	74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe
4972	74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980
2980

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid process

2980
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe

pid process

4972 74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe

pid	process
2980

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

description	pid	process
Token: SeShutdownPrivilege	2980
Token: SeCreatePagefilePrivilege	2980
Token: SeShutdownPrivilege	2980
Token: SeCreatePagefilePrivilege	2980
Token: SeShutdownPrivilege	2980
Token: SeCreatePagefilePrivilege	2980
Token: SeShutdownPrivilege	2980
Token: SeCreatePagefilePrivilege	2980
Token: SeShutdownPrivilege	2980
Token: SeCreatePagefilePrivilege	2980

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

28D5.exe

description	pid	process	target process
PID 2980 wrote to memory of 4140	2980		28D5.exe
PID 2980 wrote to memory of 4140	2980		28D5.exe
PID 2980 wrote to memory of 4140	2980		28D5.exe
PID 2980 wrote to memory of 5048	2980		2A6C.exe
PID 2980 wrote to memory of 5048	2980		2A6C.exe
PID 2980 wrote to memory of 5048	2980		2A6C.exe
PID 4140 wrote to memory of 1108	4140	28D5.exe	schtasks.exe
PID 4140 wrote to memory of 1108	4140	28D5.exe	schtasks.exe
PID 4140 wrote to memory of 1108	4140	28D5.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe
"C:\Users\Admin\AppData\Local\Temp\74b86eed28104c9f459d08d48044192745239f643d8896892acf46ce60deb3fc.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4972

C:\Users\Admin\AppData\Local\Temp\28D5.exe
C:\Users\Admin\AppData\Local\Temp\28D5.exe
1⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4140

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 /f
2⤵
- Creates scheduled task(s)
PID:1108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 1032
2⤵
- Program crash
PID:4588

C:\Users\Admin\AppData\Local\Temp\2A6C.exe
C:\Users\Admin\AppData\Local\Temp\2A6C.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 1868
2⤵
- Program crash
PID:2424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4140 -ip 4140
1⤵
PID:1572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 5048 -ip 5048
1⤵
PID:3188

C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe
C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe
1⤵
- Executes dropped EXE
PID:2812

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

6

Virtualization/Sandbox Evasion

T1497

System Information Discovery

6

Peripheral Device Discovery