vidar | cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76

General

Target

cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe
Size

764KB
MD5

6803564f8d27498decae376b90142e4f
SHA1

41faef623fe7f6eaf120ac22d66e7c6fc1779db4
SHA256

cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76
SHA512

79b3e8eaa9539995738b281c842861f118e85449094ef8d8a7e5c4774bba1a3cfadc27fc88353b3411acbbef8780c7a0348545844d461e94751aed4ade8f3f29

Score

10^/10

vidar 937 stealer

Malware Config

Extracted

Family

vidar

Version

48.2

Botnet

937

C2

https://koyu.space/@qmashton

Attributes

profile_id
937

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 2912 created 3920 2912 WerFault.exe cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

description	pid	process	target process
PID 2912 created 3920	2912	WerFault.exe	cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe

Vidar Stealer 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3920-132-0x0000000004950000-0x0000000004A25000-memory.dmp	family_vidar
behavioral2/memory/3920-133-0x0000000000400000-0x00000000004D8000-memory.dmp	family_vidar

Drops file in Windows directory 4 IoCs

Processes:

svchost.exeTiWorker.exeWerFault.exe

description	ioc	process
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
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	WerFault.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3992 3920 WerFault.exe cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe

pid	pid_target	process	target process
3992	3920	WerFault.exe	cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.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 49 IoCs

Processes:

svchost.exe

description	ioc	process
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\UplinkBps = "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\FrDownloadRatePct = "90"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "4.195836"	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\DownloadMonthlyLanBytes = "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\MemoryUsageKB = "4284"	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\DownloadMonthlyCdnBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrCnt = "0"	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 (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\UploadRatePct = "100"	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\MonthlyUploadRestriction = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadPendingCount = "0"	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\UploadMonthlyLanBytes = "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\CacheSizeBytes = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "7.143073"	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\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\DownlinkBps = "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\UploadMonthlyInternetBytes = "0"	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\LANConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4080"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132895552292804432"	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\PeerInfoCount = "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\InternetConnectionCount = "0"	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\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\DownloadMonthlyRateFrBps = "0"	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 (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "3.571123"	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

3992 WerFault.exe
3992 WerFault.exe

pid	process
3992	WerFault.exe
3992	WerFault.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

TiWorker.exe

description	pid	process
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe
Token: SeRestorePrivilege	1364	TiWorker.exe
Token: SeSecurityPrivilege	1364	TiWorker.exe
Token: SeBackupPrivilege	1364	TiWorker.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WerFault.exe

description	pid	process	target process
PID 2912 wrote to memory of 3920	2912	WerFault.exe	cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe
PID 2912 wrote to memory of 3920	2912	WerFault.exe	cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe

C:\Users\Admin\AppData\Local\Temp\cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe
"C:\Users\Admin\AppData\Local\Temp\cba4bf2713f913043fd6aa5990aa937a470f48c11c3d0361fe1cb951d6a74c76.exe"
1⤵
PID:3920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3920 -s 1032
2⤵
- Drops file in Windows directory
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
PID:3992

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:3696

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:2632

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:1364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3920 -ip 3920
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:2912

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3920-130-0x0000000002EC8000-0x0000000002F44000-memory.dmp

Filesize
496KB

Download
memory/3920-131-0x0000000002EC8000-0x0000000002F44000-memory.dmp

Filesize
496KB

Download
memory/3920-132-0x0000000004950000-0x0000000004A25000-memory.dmp

Filesize
852KB

Download
memory/3920-133-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads