e097cde0f76df948f039584045acfa6bd7ef863141560815d12c3c6e6452dce4

General

Target

xxx.exe
Size

38KB
MD5

2e936942613b9ef1a90b5216ef830fbf
SHA1

32c2ecf9703aec725034ab4a8a4c7b2944c1f0b7
SHA256

e097cde0f76df948f039584045acfa6bd7ef863141560815d12c3c6e6452dce4
SHA512

e0c456502fb397b212fd480cda44cb404bfde11e1392842d4b81059881e3db8f93d8b72bbdb7d35a95680f89ee91022b7662a1902dc6e21be86db0f3c4389e27

Score

10^/10

ransomware

Malware Config

Extracted

Path

C:\NOKOYAWA_readme.txt

Ransom Note

Dear usernamme, your files were encrypted, some are compromised. Be sure, you can't restore it without our help. You need a private key that only we have. Contact us to reach an agreement or we will leak your black shit to media: Brookslambert@protonmail.com Sheppardarmstrong@tutanota.com 亲爱的用户名，您的文件已加密，有些已被泄露。请确保，如果没有我们的帮助，您将无法恢复它。您需要一个只有我们拥有的私钥。联系我们以达成协议，否则我们会将您的黑屎泄露给媒体： Brookslambert@protonmail.com Sheppardarmstrong@tutanota.com

Emails

Brookslambert@protonmail.com

Sheppardarmstrong@tutanota.com

Signatures

Modifies extensions of user files 9 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

xxx.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\InstallReset.raw => C:\Users\Admin\Pictures\InstallReset.raw.NOKOYAWA	xxx.exe
File renamed	C:\Users\Admin\Pictures\ResolveConfirm.raw => C:\Users\Admin\Pictures\ResolveConfirm.raw.NOKOYAWA	xxx.exe
File renamed	C:\Users\Admin\Pictures\RestartInitialize.tif => C:\Users\Admin\Pictures\RestartInitialize.tif.NOKOYAWA	xxx.exe
File renamed	C:\Users\Admin\Pictures\AssertRemove.tif => C:\Users\Admin\Pictures\AssertRemove.tif.NOKOYAWA	xxx.exe
File renamed	C:\Users\Admin\Pictures\ConvertLock.png => C:\Users\Admin\Pictures\ConvertLock.png.NOKOYAWA	xxx.exe
File opened for modification	C:\Users\Admin\Pictures\EditRepair.tiff	xxx.exe
File renamed	C:\Users\Admin\Pictures\RestartUpdate.png => C:\Users\Admin\Pictures\RestartUpdate.png.NOKOYAWA	xxx.exe
File renamed	C:\Users\Admin\Pictures\EditRepair.tiff => C:\Users\Admin\Pictures\EditRepair.tiff.NOKOYAWA	xxx.exe
File renamed	C:\Users\Admin\Pictures\UpdateWrite.raw => C:\Users\Admin\Pictures\UpdateWrite.raw.NOKOYAWA	xxx.exe

Drops desktop.ini file(s) 16 IoCs

Processes:

xxx.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\3D Objects\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	xxx.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	xxx.exe

Drops file in Windows directory 2 IoCs

Processes:

svchost.exeTiWorker.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

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 49 IoCs

Processes:

svchost.exe

description	ioc	process
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 (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthlyUploadRestriction = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.000000"	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\DownloadMonthlyRateFrCnt = "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\DownlinkBps = "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\DownloadMonthlyCacheHostBytes = "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\InternetConnectionCount = "0"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config	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\DownloadMonthlyLinkLocalBytes = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4096"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.090623"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.072014"	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 (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\BkDownloadRatePct = "45"	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\SwarmCount = "1"	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\SwarmCount = "0"	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\UplinkBps = "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\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\DownloadMonthlyLanBytes = "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\UploadMonthlyInternetBytes = "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\LANConnectionCount = "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\DownloadMonthlyRateBkCnt = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132893740465059143"	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\PriorityDownloadPendingCount = "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\MemoryUsageKB = "4316"	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\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\PeerInfoCount = "0"	svchost.exe

Opens file in notepad (likely ransom note) 3 IoCs
ransomware

Processes:

NOTEPAD.EXENOTEPAD.EXENOTEPAD.EXE

pid process

2896 NOTEPAD.EXE
1540 NOTEPAD.EXE
3352 NOTEPAD.EXE

pid	process
2896	NOTEPAD.EXE
1540	NOTEPAD.EXE
3352	NOTEPAD.EXE

Suspicious use of AdjustPrivilegeToken 15 IoCs

Processes:

TiWorker.exe

description	pid	process
Token: SeSecurityPrivilege	1088	TiWorker.exe
Token: SeRestorePrivilege	1088	TiWorker.exe
Token: SeBackupPrivilege	1088	TiWorker.exe
Token: SeBackupPrivilege	1088	TiWorker.exe
Token: SeRestorePrivilege	1088	TiWorker.exe
Token: SeSecurityPrivilege	1088	TiWorker.exe
Token: SeBackupPrivilege	1088	TiWorker.exe
Token: SeRestorePrivilege	1088	TiWorker.exe
Token: SeSecurityPrivilege	1088	TiWorker.exe
Token: SeBackupPrivilege	1088	TiWorker.exe
Token: SeRestorePrivilege	1088	TiWorker.exe
Token: SeSecurityPrivilege	1088	TiWorker.exe
Token: SeBackupPrivilege	1088	TiWorker.exe
Token: SeRestorePrivilege	1088	TiWorker.exe
Token: SeSecurityPrivilege	1088	TiWorker.exe

C:\Users\Admin\AppData\Local\Temp\xxx.exe
"C:\Users\Admin\AppData\Local\Temp\xxx.exe"
1⤵
- Modifies extensions of user files
- Drops desktop.ini file(s)
PID:332

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 0
1⤵
- Checks processor information in registry
PID:4044

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\NOKOYAWA_readme.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:3352

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\NOKOYAWA_readme.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:2896

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:3772

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\NOKOYAWA_readme.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:1540

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:1088

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Desktop\NOKOYAWA_readme.txt
MD5
5aea0bfd70679b3285da2ce305e5d992

SHA1
bd90c1be51b76fb43dcb46d9781cfbebdf655520

SHA256
91b4c8028e4a86fb2fa57ef0e4f01e860ba23c1fe5ed88aa84915e281a57deb5

SHA512
c5ef4fa016103775c9581010e845cca0291ce8e33bbc16fa7c4b8059367cddcdc7a02aedc26959fba3437cef70b2167d0f815fc8f3698ba0b85da447c6e0fb96

Download Submit
C:\Users\All Users\USOShared\Logs\User\NotifyIcon.e370fe84-f6af-4ca1-b69e-5d904d8e27be.1.etl
MD5
2b936f8b77190c4859eae9af8eaf7d5b

SHA1
8f37ae902b62fb39b6eaa4d35b9cb78cb94b2ebd

SHA256
2900cc8880ff83848855b63afa5c634626e627b22184bc5d8798bc092492a79e

SHA512
b5a64ec43630862162c5211bf6932d9ccd34860d5e850ac081f887d9f9cf45aaf8f644c7ce48eb7e0202d870355343643f8d3dc870872aab2442dfeb5170f5a7

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads