arkei | af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c

General

Target

af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe
Size

1.5MB
MD5

571352cab6f177ac071bfb5a1c76b29c
SHA1

524706f5d4ad20c86a0002d58e01714016c8d759
SHA256

af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c
SHA512

7e380e339021a63f7b163830dc0f5f84dd36d18ff6f91a41e4e42a484d04fb1472b5349060aca65fa3a76f892cf2ed79c992e71ef5f828158b072130a3516630

Score

10^/10

arkei default evasion stealer themida trojan

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://86.105.252.194/JlAvGw13CF.php

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
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:

af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/3080-131-0x0000000000080000-0x00000000004B9000-memory.dmp	themida
behavioral2/memory/3080-133-0x0000000000080000-0x00000000004B9000-memory.dmp	themida
behavioral2/memory/3080-132-0x0000000000080000-0x00000000004B9000-memory.dmp	themida
behavioral2/memory/3080-134-0x0000000000080000-0x00000000004B9000-memory.dmp	themida
behavioral2/memory/3080-135-0x0000000000080000-0x00000000004B9000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

pid process

3080 af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

Drops file in Windows directory 3 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\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.dat	svchost.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

MusNotifyIcon.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

Modifies data under HKEY_USERS 50 IoCs

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "3.845642"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization	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\UploadMonthlyInternetBytes = "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 (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 = "7.352865"	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\NormalDownloadPendingCount = "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\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\InternetConnectionCount = "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\UplinkUsageBps = "0"	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\UplinkBps = "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\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 (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\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\UploadCount = "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\PriorityDownloadPendingCount = "0"	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\DownloadMonthlyCdnBytes = "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\BkDownloadRatePct = "45"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "3988"	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\DownloadMonthlyCacheHostBytes = "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\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\PriorityDownloadCount = "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\DownloadMonthlyGroupBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132895068797782718"	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\MemoryUsageKB = "4108"	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\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\DownloadMonthlyRateFrBps = "0"	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\MemoryUsageKB = "4292"	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

pid	process
3080	af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe
3080	af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

TiWorker.exe

description	pid	process
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe
Token: SeRestorePrivilege	2392	TiWorker.exe
Token: SeSecurityPrivilege	2392	TiWorker.exe
Token: SeBackupPrivilege	2392	TiWorker.exe

C:\Users\Admin\AppData\Local\Temp\af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe
"C:\Users\Admin\AppData\Local\Temp\af0d4a19bc18d9002101530069ff92be605f9d2e782c90c3166d156916a75e8c.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:3080

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:556

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:1292

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:2392

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3080-130-0x0000000077094000-0x0000000077096000-memory.dmp

Filesize
8KB

Download
memory/3080-131-0x0000000000080000-0x00000000004B9000-memory.dmp

Filesize
4.2MB

Download
memory/3080-133-0x0000000000080000-0x00000000004B9000-memory.dmp

Filesize
4.2MB

Download
memory/3080-132-0x0000000000080000-0x00000000004B9000-memory.dmp

Filesize
4.2MB

Download
memory/3080-134-0x0000000000080000-0x00000000004B9000-memory.dmp

Filesize
4.2MB

Download
memory/3080-135-0x0000000000080000-0x00000000004B9000-memory.dmp

Filesize
4.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads