amadey | 5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06

Virtualization/Sandbox Evasion

Processes:

explorha.exe5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exeexplorha.exeexplorha.exebef45c0a3f.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorha.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorha.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorha.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorha.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	bef45c0a3f.exe

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

55 2452 rundll32.exe
Downloads MZ/PE file

flow	pid	process
55	2452	rundll32.exe

Checks BIOS information in registry 2 TTPs 12 IoCs

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

Query Registry

System Information Discovery

Processes:

explorha.exe5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exebef45c0a3f.exeexplorha.exeexplorha.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bef45c0a3f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bef45c0a3f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorha.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorha.exe

Checks computer location settings 2 TTPs 5 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

Processes:

5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exechrosha.exeNewB.exeISetup8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	explorha.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	chrosha.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	NewB.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	ISetup8.exe

Executes dropped EXE 12 IoCs

Processes:

explorha.exeexplorha.exeexplorha.exebef45c0a3f.exelumma21.exeexplorha.exechrosha.exeNewB.exeISetup8.exetoolspub1.exeu3ak.0.exeu3ak.1.exe

pid	process
1380	explorha.exe
4256	explorha.exe
1656	explorha.exe
3692	bef45c0a3f.exe
3144	lumma21.exe
3088	explorha.exe
4228	chrosha.exe
4112	NewB.exe
4268	ISetup8.exe
2624	toolspub1.exe
4680	u3ak.0.exe
516	u3ak.1.exe

Identifies Wine through registry keys 2 TTPs 6 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

Virtualization/Sandbox Evasion

Processes:

explorha.exeexplorha.exebef45c0a3f.exeexplorha.exe5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Wine	explorha.exe
Key opened	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Wine	explorha.exe
Key opened	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Wine	bef45c0a3f.exe
Key opened	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Wine	explorha.exe
Key opened	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Wine	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
Key opened	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Software\Wine	explorha.exe

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2452 rundll32.exe

pid	process
2452	rundll32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\u3ak.1.exe	upx
behavioral1/memory/516-234-0x0000000000400000-0x0000000000930000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

explorha.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bef45c0a3f.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1000022001\\bef45c0a3f.exe"	explorha.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
Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs

Processes:

5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exeexplorha.exeexplorha.exeexplorha.exe

pid process

3888 5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
1380 explorha.exe
4256 explorha.exe
1656 explorha.exe
3088 explorha.exe

Drops file in Windows directory 2 IoCs

Processes:

5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exelumma21.exe

description	ioc	process
File created	C:\Windows\Tasks\explorha.job	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
File created	C:\Windows\Tasks\chrosha.job	lumma21.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4628 4268 WerFault.exe ISetup8.exe

pid	pid_target	process	target process
4628	4268	WerFault.exe	ISetup8.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:

toolspub1.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	toolspub1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	toolspub1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	toolspub1.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:

u3ak.0.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3ak.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u3ak.0.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/Job
T1053

Processes:

schtasks.exe

pid process

4424 schtasks.exe

pid	process
4424	schtasks.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

Processes:

5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exeexplorha.exeexplorha.exeexplorha.exetoolspub1.exeu3ak.0.exe

pid	process
3888	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
3888	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
1380	explorha.exe
1380	explorha.exe
4256	explorha.exe
4256	explorha.exe
1656	explorha.exe
1656	explorha.exe
3088	explorha.exe
3088	explorha.exe
2624	toolspub1.exe
2624	toolspub1.exe
4680	u3ak.0.exe
4680	u3ak.0.exe
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364
3364

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

toolspub1.exe

pid process

2624 toolspub1.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

description pid process

Token: SeShutdownPrivilege 3364
Token: SeCreatePagefilePrivilege 3364
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

u3ak.1.exe

pid process

516 u3ak.1.exe

pid	process
2624	toolspub1.exe

description	pid	process
Token: SeShutdownPrivilege	3364
Token: SeCreatePagefilePrivilege	3364

pid	process
516	u3ak.1.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exeexplorha.exerundll32.exechrosha.exeNewB.exeISetup8.exe

description	pid	process	target process
PID 3888 wrote to memory of 1380	3888	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe	explorha.exe
PID 3888 wrote to memory of 1380	3888	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe	explorha.exe
PID 3888 wrote to memory of 1380	3888	5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe	explorha.exe
PID 1380 wrote to memory of 3692	1380	explorha.exe	bef45c0a3f.exe
PID 1380 wrote to memory of 3692	1380	explorha.exe	bef45c0a3f.exe
PID 1380 wrote to memory of 3692	1380	explorha.exe	bef45c0a3f.exe
PID 1380 wrote to memory of 2624	1380	explorha.exe	rundll32.exe
PID 1380 wrote to memory of 2624	1380	explorha.exe	rundll32.exe
PID 1380 wrote to memory of 2624	1380	explorha.exe	rundll32.exe
PID 2624 wrote to memory of 4524	2624	rundll32.exe	rundll32.exe
PID 2624 wrote to memory of 4524	2624	rundll32.exe	rundll32.exe
PID 1380 wrote to memory of 2452	1380	explorha.exe	rundll32.exe
PID 1380 wrote to memory of 2452	1380	explorha.exe	rundll32.exe
PID 1380 wrote to memory of 2452	1380	explorha.exe	rundll32.exe
PID 1380 wrote to memory of 4304	1380	explorha.exe	explorha.exe
PID 1380 wrote to memory of 4304	1380	explorha.exe	explorha.exe
PID 1380 wrote to memory of 4304	1380	explorha.exe	explorha.exe
PID 1380 wrote to memory of 3144	1380	explorha.exe	lumma21.exe
PID 1380 wrote to memory of 3144	1380	explorha.exe	lumma21.exe
PID 1380 wrote to memory of 3144	1380	explorha.exe	lumma21.exe
PID 4228 wrote to memory of 4112	4228	chrosha.exe	NewB.exe
PID 4228 wrote to memory of 4112	4228	chrosha.exe	NewB.exe
PID 4228 wrote to memory of 4112	4228	chrosha.exe	NewB.exe
PID 4112 wrote to memory of 4424	4112	NewB.exe	schtasks.exe
PID 4112 wrote to memory of 4424	4112	NewB.exe	schtasks.exe
PID 4112 wrote to memory of 4424	4112	NewB.exe	schtasks.exe
PID 4112 wrote to memory of 4268	4112	NewB.exe	ISetup8.exe
PID 4112 wrote to memory of 4268	4112	NewB.exe	ISetup8.exe
PID 4112 wrote to memory of 4268	4112	NewB.exe	ISetup8.exe
PID 4112 wrote to memory of 2624	4112	NewB.exe	toolspub1.exe
PID 4112 wrote to memory of 2624	4112	NewB.exe	toolspub1.exe
PID 4112 wrote to memory of 2624	4112	NewB.exe	toolspub1.exe
PID 4268 wrote to memory of 4680	4268	ISetup8.exe	u3ak.0.exe
PID 4268 wrote to memory of 4680	4268	ISetup8.exe	u3ak.0.exe
PID 4268 wrote to memory of 4680	4268	ISetup8.exe	u3ak.0.exe
PID 4268 wrote to memory of 516	4268	ISetup8.exe	u3ak.1.exe
PID 4268 wrote to memory of 516	4268	ISetup8.exe	u3ak.1.exe
PID 4268 wrote to memory of 516	4268	ISetup8.exe	u3ak.1.exe

C:\Users\Admin\AppData\Local\Temp\5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe
"C:\Users\Admin\AppData\Local\Temp\5702ca39cbae587bbc6527d25d2f68d89ba7d7578ed61fd3cbbc1b69ec059d06.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3888

C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
"C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe"
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Executes dropped EXE
- Identifies Wine through registry keys
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1380

C:\Users\Admin\AppData\Local\Temp\1000022001\bef45c0a3f.exe
"C:\Users\Admin\AppData\Local\Temp\1000022001\bef45c0a3f.exe"
3⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
PID:3692

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\a091ec0a6e2227\cred64.dll, Main
3⤵
- Suspicious use of WriteProcessMemory
PID:2624

C:\Windows\system32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\a091ec0a6e2227\cred64.dll, Main
4⤵
PID:4524

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\a091ec0a6e2227\clip64.dll, Main
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:2452

C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
"C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe"
3⤵
PID:4304

C:\Users\Admin\AppData\Local\Temp\1000037001\lumma21.exe
"C:\Users\Admin\AppData\Local\Temp\1000037001\lumma21.exe"
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3144

C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:4256

C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:1656

C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
C:\Users\Admin\AppData\Local\Temp\09fd851a4f\explorha.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:3088

C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe
C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4228

C:\Users\Admin\AppData\Local\Temp\1000100001\NewB.exe
"C:\Users\Admin\AppData\Local\Temp\1000100001\NewB.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4112

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 1 /TN NewB.exe /TR "C:\Users\Admin\AppData\Local\Temp\1000100001\NewB.exe" /F
3⤵
- Creates scheduled task(s)
PID:4424

C:\Users\Admin\AppData\Local\Temp\1000180001\ISetup8.exe
"C:\Users\Admin\AppData\Local\Temp\1000180001\ISetup8.exe"
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4268

C:\Users\Admin\AppData\Local\Temp\u3ak.0.exe
"C:\Users\Admin\AppData\Local\Temp\u3ak.0.exe"
4⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4680

C:\Users\Admin\AppData\Local\Temp\u3ak.1.exe
"C:\Users\Admin\AppData\Local\Temp\u3ak.1.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 1188
4⤵
- Program crash
PID:4628

C:\Users\Admin\AppData\Local\Temp\1000181001\toolspub1.exe
"C:\Users\Admin\AppData\Local\Temp\1000181001\toolspub1.exe"
3⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:2624

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4268 -ip 4268
1⤵
PID:3208

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Virtualization/Sandbox Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

Virtualization/Sandbox Evasion

System Information Discovery