a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2

General

Target

a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe
Size

4.6MB
MD5

806294c4fd3cbc73898592172a91010b
SHA1

d13d2aaeeff97a0f32f8779c4ffc19ab999a1b9c
SHA256

a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2
SHA512

01e076dabe4ebfde90b6379914e89ff1ce4ce3f9f8a5e19d99aca4ede2f658e1a0d4a064c3610d495a2f3a9c8aeb9513262e55538144c5dcfd3ae4de4e68dfa5

Score

4^/10

Malware Config

Signatures

Drops file in Windows directory 2 IoCs

Processes:

TiWorker.exe

description	ioc	process
File opened for modification	C:\Windows\WinSxS\pending.xml	TiWorker.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
3848	756	WerFault.exe	a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe
3992	756	WerFault.exe	a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe

Checks processor information in registry 2 TTPs 5 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

MusNotifyIcon.exeWerFault.exe

description	ioc	process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MusNotifyIcon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	MusNotifyIcon.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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 47 IoCs

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyInternetBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkBps = "0"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadCount = "0"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Settings	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DODownloadMode = "1"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLinkLocalBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkUsageBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\BkDownloadRatePct = "45"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4272"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DownloadMode_BackCompat = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyInternetBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyGroupBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrCnt = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PeerInfoCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyLanBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLanBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CDNConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadPendingCount = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.211376"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "2"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CacheSizeBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LANConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LinkLocalConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\GroupConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\FrDownloadRatePct = "90"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.000000"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4220"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCacheHostBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\InternetConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthlyUploadRestriction = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "3.332273"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "3876"	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

3848 WerFault.exe
3848 WerFault.exe

pid	process
3848	WerFault.exe
3848	WerFault.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

TiWorker.exeWerFault.exe

description	pid	process
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	3848	WerFault.exe
Token: SeBackupPrivilege	3848	WerFault.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe
Token: SeSecurityPrivilege	1216	TiWorker.exe
Token: SeBackupPrivilege	1216	TiWorker.exe
Token: SeRestorePrivilege	1216	TiWorker.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe

description	pid	process	target process
PID 756 wrote to memory of 3848	756	a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe	WerFault.exe
PID 756 wrote to memory of 3848	756	a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe	WerFault.exe
PID 756 wrote to memory of 3848	756	a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe
"C:\Users\Admin\AppData\Local\Temp\a2a00bf52d0343707f9501f481e4df4ea91419b634fc1ae6bca593aab132aed2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 756 -s 372
2⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 756 -s 372
2⤵
- Program crash
PID:3992

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:1060

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p
1⤵
- Modifies data under HKEY_USERS
PID:872

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 756 -ip 756
1⤵
PID:2748

C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1216

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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