vidar | 43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c

General

Target

43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe
Size

612KB
MD5

2055b95f66dd6c98d5d3fd11f3a68587
SHA1

9292ef053d0395fd6084caacdf5e126a2062ff19
SHA256

43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c
SHA512

d5e10ec696d8e900d3e5b05c1ce4034eeec7ea56f30adb2516e028962029fc5dc4e89715c9f28487839b038b9eec0b1471c49eaa25934b04010462cfc140d643

Score

10^/10

vidar 937 stealer

Malware Config

Extracted

Family

vidar

Version

47.8

Botnet

937

C2

https://mas.to/@romashkin

Attributes

profile_id
937

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 1328 created 2720 1328 WerFault.exe 43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

description	pid	process	target process
PID 1328 created 2720	1328	WerFault.exe	43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe

Vidar Stealer 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2720-131-0x00000000022F0000-0x00000000023C6000-memory.dmp	family_vidar
behavioral2/memory/2720-132-0x0000000000400000-0x00000000004D9000-memory.dmp	family_vidar

Drops file in Windows directory 8 IoCs

Processes:

TiWorker.exesvchost.exe

description	ioc	process
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
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4420 2720 WerFault.exe 43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe

pid	pid_target	process	target process
4420	2720	WerFault.exe	43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
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

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

4420 WerFault.exe
4420 WerFault.exe

pid	process
4420	WerFault.exe
4420	WerFault.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

WerFault.exesvchost.exeTiWorker.exe

description	pid	process
Token: SeRestorePrivilege	4420	WerFault.exe
Token: SeBackupPrivilege	4420	WerFault.exe
Token: SeShutdownPrivilege	1332	svchost.exe
Token: SeCreatePagefilePrivilege	1332	svchost.exe
Token: SeShutdownPrivilege	1332	svchost.exe
Token: SeCreatePagefilePrivilege	1332	svchost.exe
Token: SeShutdownPrivilege	1332	svchost.exe
Token: SeCreatePagefilePrivilege	1332	svchost.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe
Token: SeSecurityPrivilege	4932	TiWorker.exe
Token: SeBackupPrivilege	4932	TiWorker.exe
Token: SeRestorePrivilege	4932	TiWorker.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WerFault.exe

description	pid	process	target process
PID 1328 wrote to memory of 2720	1328	WerFault.exe	43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe
PID 1328 wrote to memory of 2720	1328	WerFault.exe	43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe

C:\Users\Admin\AppData\Local\Temp\43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe
"C:\Users\Admin\AppData\Local\Temp\43e7ee9e95c1b1c52aa97394cba30a5432c0ef81d28c5460c48686e1a0628f6c.exe"
1⤵
PID:2720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 1016
2⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2720 -ip 2720
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:1328

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1332

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:4932

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/1332-133-0x0000015315190000-0x00000153151A0000-memory.dmp

Filesize
64KB

Download
memory/1332-134-0x00000153159E0000-0x00000153159F0000-memory.dmp

Filesize
64KB

Download
memory/1332-135-0x0000015317F10000-0x0000015317F14000-memory.dmp

Filesize
16KB

Download
memory/2720-130-0x0000000002270000-0x00000000022EC000-memory.dmp

Filesize
496KB

Download
memory/2720-131-0x00000000022F0000-0x00000000023C6000-memory.dmp

Filesize
856KB

Download
memory/2720-132-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads