ryuk | d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82

General

Target

d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
Size

188KB
MD5

28b6df2007a3b33b43a13ab518f2947d
SHA1

7ea40bac1432c34736bd0cce346d8f9b983c627b
SHA256

d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82
SHA512

e851fae2a441a1b0814d4725ea288875cd44229573449eddff2af1db66433d27461edf246a6f9ce01a32025985f008c0b6a0ada134aaaf2020b8f8d2ce683f58

Score

10^/10

ryuk ransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note

<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html��

Emails

[email protected]

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk
Executes dropped EXE 1 IoCs

Processes:

VapMbAo.exe

pid process

1596 VapMbAo.exe

pid	process
1596	VapMbAo.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exeVapMbAo.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	VapMbAo.exe

Drops file in Windows directory 2 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\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.dat	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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
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\DownloadMonthlyCacheHostBytes = "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\Config\KVFileExpirationTime = "132899719546587811"	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\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\SwarmCount = "0"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization	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\CDNConnectionCount = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.391330"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4232"	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\Config\DownloadMode_BackCompat = "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\CacheSizeBytes = "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\DownloadMonthlyCdnBytes = "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\Usage\SwarmCount = "1"	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\UplinkUsageBps = "0"	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 = "0.121360"	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\PeerInfoCount = "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\BkDownloadRatePct = "45"	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\DownloadMonthlyLinkLocalBytes = "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\Usage\DownloadMonthlyRateFrCnt = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100"	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\MemoryUsageKB = "4100"	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\DownloadMonthlyLanBytes = "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\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\FrDownloadRatePct = "90"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4224"	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\DownloadMonthlyInternetBytes = "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\LANConnectionCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "0"	svchost.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exeVapMbAo.exe

pid	process
3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
1596	VapMbAo.exe
1596	VapMbAo.exe
3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exeVapMbAo.exeTiWorker.exe

description	pid	process
Token: SeBackupPrivilege	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
Token: SeBackupPrivilege	1596	VapMbAo.exe
Token: SeSecurityPrivilege	1008	TiWorker.exe
Token: SeRestorePrivilege	1008	TiWorker.exe
Token: SeBackupPrivilege	1008	TiWorker.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exeVapMbAo.exe

description	pid	process	target process
PID 3284 wrote to memory of 1596	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	VapMbAo.exe
PID 3284 wrote to memory of 1596	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	VapMbAo.exe
PID 3284 wrote to memory of 1596	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	VapMbAo.exe
PID 3284 wrote to memory of 1512	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 1512	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 1512	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 1596 wrote to memory of 400	1596	VapMbAo.exe	net.exe
PID 1596 wrote to memory of 400	1596	VapMbAo.exe	net.exe
PID 1596 wrote to memory of 400	1596	VapMbAo.exe	net.exe
PID 3284 wrote to memory of 752	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 752	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 752	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 4052	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 4052	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 4052	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 1596 wrote to memory of 1220	1596	VapMbAo.exe	net.exe
PID 1596 wrote to memory of 1220	1596	VapMbAo.exe	net.exe
PID 1596 wrote to memory of 1220	1596	VapMbAo.exe	net.exe
PID 3284 wrote to memory of 2596	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 2596	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe
PID 3284 wrote to memory of 2596	3284	d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe	net.exe

C:\Users\Admin\AppData\Local\Temp\d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe
"C:\Users\Admin\AppData\Local\Temp\d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3284

C:\Users\Admin\AppData\Local\Temp\VapMbAo.exe
"C:\Users\Admin\AppData\Local\Temp\VapMbAo.exe" 8 LAN
2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1596

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
3⤵
PID:400

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
3⤵
PID:1220

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
2⤵
PID:1512

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
2⤵
PID:752

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
PID:4052

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
PID:2596

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:1124

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:3920

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:1008

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

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys\08e575673cce10c72090304839888e02_0d751396-3164-4736-b931-4f59d47ff1f2
MD5
93a5aadeec082ffc1bca5aa27af70f52

SHA1
47a92aee3ea4d1c1954ed4da9f86dd79d9277d31

SHA256
a1a21799e98f97f271657ce656076f33dcb020d9370f1f2671d783cafd230294

SHA512
df388c8d83e779e006d6311b2046fcf9259ec33d379fc0e2c6a4b6b90418f587a12c5c23acd488413a02568ca2d3effe04608ec7c791925c7ed53dc71093ca45

Download Submit
C:\Users\Admin\AppData\Local\Temp\VapMbAo.exe
MD5
28b6df2007a3b33b43a13ab518f2947d

SHA1
7ea40bac1432c34736bd0cce346d8f9b983c627b

SHA256
d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82

SHA512
e851fae2a441a1b0814d4725ea288875cd44229573449eddff2af1db66433d27461edf246a6f9ce01a32025985f008c0b6a0ada134aaaf2020b8f8d2ce683f58

Download Submit
C:\Users\Admin\AppData\Local\Temp\VapMbAo.exe
MD5
28b6df2007a3b33b43a13ab518f2947d

SHA1
7ea40bac1432c34736bd0cce346d8f9b983c627b

SHA256
d29d9915be6d41e899cec8593a36bf55acf63a1d574c65d7562898dab6dafa82

SHA512
e851fae2a441a1b0814d4725ea288875cd44229573449eddff2af1db66433d27461edf246a6f9ce01a32025985f008c0b6a0ada134aaaf2020b8f8d2ce683f58

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads