91cd8bfbe714acc43beff32856c3d56ded48706d3c92c492a1acb994b606003b

Analysis

max time kernel
1547s
max time network
1738s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
16-02-2022 17:24

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General

Target

all/gcs/kura.exe
Size

3.3MB
MD5

208a92b2100ef3dc268b709e7a9aa3e2
SHA1

2825a5777445dd584289fe35e41c836f8743dbcb
SHA256

5e8394b44ba1373b36214d09b16a43ada6d001e55509de72c1f85928481422b0
SHA512

fa64f5ab44d63ee3963dfbc4c49f089fb9395c55a4847096c7791935876bfdb91af6653dc27db6a012cfba02ef97b7e5ac278a5145f1ad3b80fa735f1d86699a

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

kura.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	kura.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	kura.exe

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral32/memory/3528-131-0x00007FF78D6B0000-0x00007FF78DFB4000-memory.dmp	themida
behavioral32/memory/3528-132-0x00007FF78D6B0000-0x00007FF78DFB4000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

kura.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA kura.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

kura.exe

pid process

3528 kura.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	kura.exe

pid	process
3528	kura.exe

Drops file in Windows directory 8 IoCs

Processes:

TiWorker.exesvchost.exe

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

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

svchost.exeTiWorker.exe

description	pid	process
Token: SeShutdownPrivilege	2776	svchost.exe
Token: SeCreatePagefilePrivilege	2776	svchost.exe
Token: SeShutdownPrivilege	2776	svchost.exe
Token: SeCreatePagefilePrivilege	2776	svchost.exe
Token: SeShutdownPrivilege	2776	svchost.exe
Token: SeCreatePagefilePrivilege	2776	svchost.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe
Token: SeRestorePrivilege	3856	TiWorker.exe
Token: SeSecurityPrivilege	3856	TiWorker.exe
Token: SeBackupPrivilege	3856	TiWorker.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

kura.exe

description pid process target process

PID 3528 wrote to memory of 3704 3528 kura.exe cmd.exe
PID 3528 wrote to memory of 3704 3528 kura.exe cmd.exe

description	pid	process	target process
PID 3528 wrote to memory of 3704	3528	kura.exe	cmd.exe
PID 3528 wrote to memory of 3704	3528	kura.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\all\gcs\kura.exe
"C:\Users\Admin\AppData\Local\Temp\all\gcs\kura.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:3528

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c cls
2⤵
PID:3704

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:2776

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:3856

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2776-133-0x000001D13D530000-0x000001D13D540000-memory.dmp

Filesize
64KB

Download
memory/2776-134-0x000001D13D5A0000-0x000001D13D5B0000-memory.dmp

Filesize
64KB

Download
memory/2776-135-0x000001D1402B0000-0x000001D1402B4000-memory.dmp

Filesize
16KB

Download
memory/2776-136-0x000001D1402D0000-0x000001D1402D4000-memory.dmp

Filesize
16KB

Download
memory/2776-137-0x000001D140210000-0x000001D140211000-memory.dmp

Filesize
4KB

Download
memory/2776-139-0x000001D1401D0000-0x000001D1401D1000-memory.dmp

Filesize
4KB

Download
memory/3528-130-0x00007FFF998F0000-0x00007FFF998F2000-memory.dmp

Filesize
8KB

Download
memory/3528-131-0x00007FF78D6B0000-0x00007FF78DFB4000-memory.dmp

Filesize
9.0MB

Download
memory/3528-132-0x00007FF78D6B0000-0x00007FF78DFB4000-memory.dmp

Filesize
9.0MB

Download