9c4807666747c9befea4427e5b9791193fdb105d53400639e8cc401d92463be2

Resubmissions

01-11-2021 12:31

211101-pp5r3ahha4 10

31-10-2021 09:03

211031-k1bwxacfaq 10

14-10-2021 01:44

211014-b6aflafeg4 10

Analysis

max time kernel
148s
max time network
136s
platform
windows11_x64
resource
win11
submitted
01-11-2021 12:31

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General

Target

67785724b67ecd79b7cd4c64a249794b9abda8b680fe52a0ce85bb83ddfb6cce.dll
Size

1.4MB
MD5

c00e0c5f7cf5ca5a1ecaf2f52cb0fe3f
SHA1

943f28aaad96f667c5afc9480f14f06701b6faf1
SHA256

67785724b67ecd79b7cd4c64a249794b9abda8b680fe52a0ce85bb83ddfb6cce
SHA512

685b3472e5a9f11fa21bc21b4c213256aaa23ed12db109ceb410f018df4e24114628ae9c6088d43e438d8f756f18dcad83797ee39562eb17c0131f1aa4133078

Score

10^/10

persistence

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 3784 created 2912 3784 WerFault.exe regsvr32.exe
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

description	pid	process	target process
PID 3784 created 2912	3784	WerFault.exe	regsvr32.exe

Drops file in Windows directory 8 IoCs

Processes:

svchost.exeTiWorker.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe
File opened for modification	C:\Windows\WinSxS\pending.xml	TiWorker.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

5076 2912 WerFault.exe regsvr32.exe

pid	pid_target	process	target process
5076	2912	WerFault.exe	regsvr32.exe

Checks processor information in registry 2 TTPs 9 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exesvchost.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision	WerFault.exe
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Platform Specific Field 1	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	WerFault.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Modifies data under HKEY_USERS 64 IoCs

Processes:

WaaSMedicAgent.exeWaaSMedicAgent.exeWaaSMedicAgent.exesvchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

5076 WerFault.exe
5076 WerFault.exe

pid	process
5076	WerFault.exe
5076	WerFault.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

WerFault.exesvchost.exesvchost.exeTiWorker.exe

description	pid	process
Token: SeRestorePrivilege	5076	WerFault.exe
Token: SeBackupPrivilege	5076	WerFault.exe
Token: SeShutdownPrivilege	1896	svchost.exe
Token: SeCreatePagefilePrivilege	1896	svchost.exe
Token: SeShutdownPrivilege	1896	svchost.exe
Token: SeCreatePagefilePrivilege	1896	svchost.exe
Token: SeShutdownPrivilege	1896	svchost.exe
Token: SeCreatePagefilePrivilege	1896	svchost.exe
Token: SeShutdownPrivilege	2904	svchost.exe
Token: SeCreatePagefilePrivilege	2904	svchost.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe
Token: SeBackupPrivilege	4064	TiWorker.exe
Token: SeRestorePrivilege	4064	TiWorker.exe
Token: SeSecurityPrivilege	4064	TiWorker.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

regsvr32.exeWerFault.exesvchost.exe

description	pid	process	target process
PID 824 wrote to memory of 2912	824	regsvr32.exe	regsvr32.exe
PID 824 wrote to memory of 2912	824	regsvr32.exe	regsvr32.exe
PID 824 wrote to memory of 2912	824	regsvr32.exe	regsvr32.exe
PID 3784 wrote to memory of 2912	3784	WerFault.exe	regsvr32.exe
PID 3784 wrote to memory of 2912	3784	WerFault.exe	regsvr32.exe
PID 2904 wrote to memory of 916	2904	svchost.exe	MoUsoCoreWorker.exe
PID 2904 wrote to memory of 916	2904	svchost.exe	MoUsoCoreWorker.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\67785724b67ecd79b7cd4c64a249794b9abda8b680fe52a0ce85bb83ddfb6cce.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:824

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\67785724b67ecd79b7cd4c64a249794b9abda8b680fe52a0ce85bb83ddfb6cce.dll
2⤵
PID:2912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2912 -s 500
3⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2912 -ip 2912
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3784

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 7de5d2a3dbb80c574e3c05d76c848a26 kW/Bv3SGgkmJZpV4BOSOAA.0.1.0.3.0
1⤵
- Modifies data under HKEY_USERS
PID:968

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1896

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s UsoSvc
1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2904

C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
2⤵
PID:916

C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.22000.100_none_04da31ff4c67c24a\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.22000.100_none_04da31ff4c67c24a\TiWorker.exe -Embedding
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4064

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 7de5d2a3dbb80c574e3c05d76c848a26 kW/Bv3SGgkmJZpV4BOSOAA.0.1.0.3.0
1⤵
- Modifies data under HKEY_USERS
PID:2808

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 7de5d2a3dbb80c574e3c05d76c848a26 kW/Bv3SGgkmJZpV4BOSOAA.0.1.0.3.0
1⤵
- Modifies data under HKEY_USERS
PID:3064

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/916-150-0x0000000000000000-mapping.dmp

Download
memory/1896-147-0x000001B34A960000-0x000001B34A970000-memory.dmp

Filesize
64KB

Download
memory/1896-148-0x000001B34B020000-0x000001B34B030000-memory.dmp

Filesize
64KB

Download
memory/1896-149-0x000001B34D740000-0x000001B34D744000-memory.dmp

Filesize
16KB

Download
memory/2912-146-0x0000000000000000-mapping.dmp

Download