systembc | 3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a370689dc516c2418a58e

General

Target

3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
Size

344KB
MD5

0c8e60e686bed8b0debc760b085f89a7
SHA1

60eae9962d92223a448f978004972f4be2f10588
SHA256

3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a370689dc516c2418a58e
SHA512

e0be1a48c2715c820306ca43443f010ab65589525e35755e42df8291dfad083cb2f6f8204f44c4248269221212eaf8f73fdf1c44f24be217d40e42a0b62648f3

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

107.155.124.13:4001

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 3308 created 3656 3308 WerFault.exe 3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

description	pid	process	target process
PID 3308 created 3656	3308	WerFault.exe	3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe

Drops file in Windows directory 5 IoCs

Processes:

3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exesvchost.exeTiWorker.exe

description	ioc	process
File created	C:\Windows\Tasks\wow64.job	3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
File opened for modification	C:\Windows\Tasks\wow64.job	3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
File opened for modification	C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.dat	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

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2340 3656 WerFault.exe 3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe

pid	pid_target	process	target process
2340	3656	WerFault.exe	3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.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:

WerFault.exeMusNotifyIcon.exe

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

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 56 IoCs

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "4"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "14.282691"	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\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\GroupConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DODownloadMode = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "1157726"	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\UploadRatePct = "100"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "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\Usage\DownloadMonthlyInternetBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "14.289712"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\Geo_EndpointFullUri = "https://geo.prod.do.dsp.mp.microsoft.com/geo"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\GeoVersion_EndpointFullUri = "https://geover.prod.do.dsp.mp.microsoft.com/geoversion"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "1"	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\UplinkUsageBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4076"	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\NormalDownloadPendingCount = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "7.812148"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "1"	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\UplinkBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4020"	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\Config\KVFileExpirationTime = "132896824362164762"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "90228624"	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\SwarmCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4296"	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\DownlinkUsageBps = "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\DownloadMonthlyCacheHostBytes = "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\UploadCount = "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\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\MonthlyUploadRestriction = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "0"	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\DownloadMonthlyRateBkCnt = "0"	svchost.exe
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\DownloadMonthlyLinkLocalBytes = "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\InternetConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkBps = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\FrDownloadRatePct = "90"	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\MemoryUsageKB = "4292"	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

2340 WerFault.exe
2340 WerFault.exe

pid	process
2340	WerFault.exe
2340	WerFault.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

TiWorker.exe

description	pid	process
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe
Token: SeRestorePrivilege	2056	TiWorker.exe
Token: SeSecurityPrivilege	2056	TiWorker.exe
Token: SeBackupPrivilege	2056	TiWorker.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WerFault.exe

description	pid	process	target process
PID 3308 wrote to memory of 3656	3308	WerFault.exe	3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
PID 3308 wrote to memory of 3656	3308	WerFault.exe	3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe

C:\Users\Admin\AppData\Local\Temp\3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
"C:\Users\Admin\AppData\Local\Temp\3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe"
1⤵
- Drops file in Windows directory
PID:3656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3656 -s 480
2⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
PID:2340

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:3124

C:\Users\Admin\AppData\Local\Temp\3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe
C:\Users\Admin\AppData\Local\Temp\3d44aa7a97608eb72bb53fc9c679e21381867f6e5a2a3.exe start
1⤵
PID:2296

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
PID:3956

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:2056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3656 -ip 3656
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3308

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2296-134-0x0000000000A0C000-0x0000000000A1C000-memory.dmp

Filesize
64KB

Download
memory/2296-135-0x0000000000A0C000-0x0000000000A1C000-memory.dmp

Filesize
64KB

Download
memory/2296-136-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/3656-130-0x0000000000A69000-0x0000000000A7A000-memory.dmp

Filesize
68KB

Download
memory/3656-131-0x0000000000A69000-0x0000000000A7A000-memory.dmp

Filesize
68KB

Download
memory/3656-132-0x00000000009F0000-0x00000000009F5000-memory.dmp

Filesize
20KB

Download
memory/3656-133-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads