smokeloader | a3c625b0c6de6b9885470ce4e5f55e08e64c82c668cdc1df8d1a81d751f401be

Processes:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\Meis = "regsvr32.exe /s C:\\Users\\Admin\\AppData\\Roaming\\Cexaox\\fukymiyr.dll"	msiexec.exe

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

JavaScript code in executable 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\LocalLow\3098htrhpen8ifg0\nss3.dll	js

Modifies service 2 TTPs 2 IoCs

persistence

Modify Registry

Modify Existing Service

T1031

Processes:

ipconfig.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NapAgent\Shas	ipconfig.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NapAgent\Qecs	ipconfig.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

regsvr32.exe

description pid process target process

PID 1964 set thread context of 1064 1964 regsvr32.exe msiexec.exe

description	pid	process	target process
PID 1964 set thread context of 1064	1964	regsvr32.exe	msiexec.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

3Z8QHEBk.tmp.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3Z8QHEBk.tmp.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3Z8QHEBk.tmp.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3Z8QHEBk.tmp.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

688 timeout.exe
Discovers systems in the same network 1 TTPs 2 IoCs
discovery

Remote System Discovery
T1018

Processes:

net.exenet.exe

pid process

1096 net.exe
1448 net.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

ipconfig.exe

pid process

956 ipconfig.exe

pid	process
688	timeout.exe

pid	process
1096	net.exe
1448	net.exe

pid	process
956	ipconfig.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

Processes:

975F.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	975F.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	975F.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 774 IoCs

Processes:

3Z8QHEBk.tmp.exe

pid	process
1060	3Z8QHEBk.tmp.exe
1060	3Z8QHEBk.tmp.exe
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
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1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
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1324
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1324
1324
1324
1324
1324
1324
1324
1324
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1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324
1324

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

3Z8QHEBk.tmp.exe

pid process

1060 3Z8QHEBk.tmp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 1064 msiexec.exe
Token: SeSecurityPrivilege 1064 msiexec.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

pid process

1324
1324
1324
1324
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

pid process

1324
1324
1324
1324

description	pid	process
Token: SeSecurityPrivilege	1064	msiexec.exe
Token: SeSecurityPrivilege	1064	msiexec.exe

pid	process
1324
1324
1324
1324

pid	process
1324
1324
1324
1324

Suspicious use of WriteProcessMemory 69 IoCs

Processes:

regsvr32.exe975F.execmd.exeregsvr32.exemsiexec.execmd.execmd.exenet.execmd.exe

description	pid	process	target process
PID 1324 wrote to memory of 1864	1324		975F.exe
PID 1324 wrote to memory of 1864	1324		975F.exe
PID 1324 wrote to memory of 1864	1324		975F.exe
PID 1324 wrote to memory of 1864	1324		975F.exe
PID 1324 wrote to memory of 1880	1324		regsvr32.exe
PID 1324 wrote to memory of 1880	1324		regsvr32.exe
PID 1324 wrote to memory of 1880	1324		regsvr32.exe
PID 1324 wrote to memory of 1880	1324		regsvr32.exe
PID 1324 wrote to memory of 1880	1324		regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1880 wrote to memory of 1964	1880	regsvr32.exe	regsvr32.exe
PID 1864 wrote to memory of 580	1864	975F.exe	cmd.exe
PID 1864 wrote to memory of 580	1864	975F.exe	cmd.exe
PID 1864 wrote to memory of 580	1864	975F.exe	cmd.exe
PID 1864 wrote to memory of 580	1864	975F.exe	cmd.exe
PID 580 wrote to memory of 688	580	cmd.exe	timeout.exe
PID 580 wrote to memory of 688	580	cmd.exe	timeout.exe
PID 580 wrote to memory of 688	580	cmd.exe	timeout.exe
PID 580 wrote to memory of 688	580	cmd.exe	timeout.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1964 wrote to memory of 1064	1964	regsvr32.exe	msiexec.exe
PID 1064 wrote to memory of 788	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 788	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 788	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 788	1064	msiexec.exe	cmd.exe
PID 788 wrote to memory of 956	788	cmd.exe	ipconfig.exe
PID 788 wrote to memory of 956	788	cmd.exe	ipconfig.exe
PID 788 wrote to memory of 956	788	cmd.exe	ipconfig.exe
PID 788 wrote to memory of 956	788	cmd.exe	ipconfig.exe
PID 1064 wrote to memory of 1400	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1400	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1400	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1400	1064	msiexec.exe	cmd.exe
PID 1400 wrote to memory of 1320	1400	cmd.exe	net.exe
PID 1400 wrote to memory of 1320	1400	cmd.exe	net.exe
PID 1400 wrote to memory of 1320	1400	cmd.exe	net.exe
PID 1400 wrote to memory of 1320	1400	cmd.exe	net.exe
PID 1320 wrote to memory of 1332	1320	net.exe	net1.exe
PID 1320 wrote to memory of 1332	1320	net.exe	net1.exe
PID 1320 wrote to memory of 1332	1320	net.exe	net1.exe
PID 1320 wrote to memory of 1332	1320	net.exe	net1.exe
PID 1064 wrote to memory of 1068	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1068	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1068	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1068	1064	msiexec.exe	cmd.exe
PID 1068 wrote to memory of 1096	1068	cmd.exe	net.exe
PID 1068 wrote to memory of 1096	1068	cmd.exe	net.exe
PID 1068 wrote to memory of 1096	1068	cmd.exe	net.exe
PID 1068 wrote to memory of 1096	1068	cmd.exe	net.exe
PID 1064 wrote to memory of 1244	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1244	1064	msiexec.exe	cmd.exe
PID 1064 wrote to memory of 1244	1064	msiexec.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\3Z8QHEBk.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\3Z8QHEBk.tmp.exe"
1⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1060

C:\Users\Admin\AppData\Local\Temp\975F.exe
C:\Users\Admin\AppData\Local\Temp\975F.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:1864

C:\Windows\SysWOW64\cmd.exe
cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\975F.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:580

C:\Windows\SysWOW64\timeout.exe
timeout /T 10 /NOBREAK
3⤵
- Delays execution with timeout.exe
PID:688

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\982B.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1880

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\982B.dll
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1964

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Blacklisted process makes network request
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ipconfig /all
4⤵
- Suspicious use of WriteProcessMemory
PID:788

C:\Windows\SysWOW64\ipconfig.exe
ipconfig /all
5⤵
- Modifies service
- Gathers network information
PID:956

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c net config workstation
4⤵
- Suspicious use of WriteProcessMemory
PID:1400

C:\Windows\SysWOW64\net.exe
net config workstation
5⤵
- Suspicious use of WriteProcessMemory
PID:1320

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 config workstation
6⤵
PID:1332

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c net view /all
4⤵
- Suspicious use of WriteProcessMemory
PID:1068

C:\Windows\SysWOW64\net.exe
net view /all
5⤵
- Discovers systems in the same network
PID:1096

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c net view /all /domain
4⤵
PID:1244

C:\Windows\SysWOW64\net.exe
net view /all /domain
5⤵
- Discovers systems in the same network
PID:1448

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Registry Run Keys / Startup Folder

T1060

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

Modify Registry

3

Install Root Certificate

T1130

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Remote System Discovery

T1018

Lateral Movement

Collection

Data from Local System