ryuk | 943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1

General

Target

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
Size

188KB
MD5

a17dd2f7ad9f6aceffe1cebe038035af
SHA1

3e792a39abc45eb3c10084e76c8ddaeb48cb2f93
SHA256

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1
SHA512

1f968febf046ec88644d4ddfc9ba1e4180b9dad8b671f337ded2c350bbea73d2fd25b68741a649c4e0974e0db0b5bd8520092327f6b1f65b2361d2c0db859ede

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:

LvQGODy.exe

pid process

2884 LvQGODy.exe

pid	process
2884	LvQGODy.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:

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exeLvQGODy.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	LvQGODy.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

description	ioc	process
File opened (read-only)	\??\a:	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
File opened (read-only)	\??\A:	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

Drops file in Windows directory 1 IoCs

Processes:

svchost.exe

description	ioc	process
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

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\CacheSizeBytes = "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\GroupConnectionCount = "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\UploadMonthlyLanBytes = "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\MonthID = "2"	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\NormalDownloadPendingCount = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4144"	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\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\NormalDownloadCount = "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 = "132899835851529699"	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\CDNConnectionCount = "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
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\UplinkBps = "0"	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\DownloadMonthlyRateBkCnt = "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\UploadCount = "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\DownloadMonthlyGroupBytes = "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\InternetConnectionCount = "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\PriorityDownloadPendingCount = "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\DownloadMonthlyCacheHostBytes = "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\DownlinkBps = "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\BkDownloadRatePct = "45"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4380"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "1.166198"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.083472"	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\Config\DownloadMode_BackCompat = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "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\UploadRatePct = "100"	svchost.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

pid	process
2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

description pid process

Token: SeBackupPrivilege 2576 943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

description	pid	process
Token: SeBackupPrivilege	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exenet.exenet.exenet.exenet.exenet.exenet.exe

description	pid	process	target process
PID 2576 wrote to memory of 2884	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	LvQGODy.exe
PID 2576 wrote to memory of 2884	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	LvQGODy.exe
PID 2576 wrote to memory of 2884	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	LvQGODy.exe
PID 2576 wrote to memory of 3016	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 3016	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 3016	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 3652	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 3652	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 3652	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 3652 wrote to memory of 3312	3652	net.exe	net1.exe
PID 3652 wrote to memory of 3312	3652	net.exe	net1.exe
PID 3652 wrote to memory of 3312	3652	net.exe	net1.exe
PID 3016 wrote to memory of 844	3016	net.exe	net1.exe
PID 3016 wrote to memory of 844	3016	net.exe	net1.exe
PID 3016 wrote to memory of 844	3016	net.exe	net1.exe
PID 2576 wrote to memory of 424	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 424	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 424	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 424 wrote to memory of 1416	424	net.exe	net1.exe
PID 424 wrote to memory of 1416	424	net.exe	net1.exe
PID 424 wrote to memory of 1416	424	net.exe	net1.exe
PID 2576 wrote to memory of 1212	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 1212	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 2576 wrote to memory of 1212	2576	943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe	net.exe
PID 1212 wrote to memory of 3188	1212	net.exe	net1.exe
PID 1212 wrote to memory of 3188	1212	net.exe	net1.exe
PID 1212 wrote to memory of 3188	1212	net.exe	net1.exe
PID 3564 wrote to memory of 1724	3564	net.exe	net1.exe
PID 3564 wrote to memory of 1724	3564	net.exe	net1.exe
PID 3564 wrote to memory of 1724	3564	net.exe	net1.exe
PID 4196 wrote to memory of 4256	4196	net.exe	net1.exe
PID 4196 wrote to memory of 4256	4196	net.exe	net1.exe
PID 4196 wrote to memory of 4256	4196	net.exe	net1.exe

C:\Users\Admin\AppData\Local\Temp\943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe
"C:\Users\Admin\AppData\Local\Temp\943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1.exe"
1⤵
- Checks computer location settings
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Users\Admin\AppData\Local\Temp\LvQGODy.exe
  "C:\Users\Admin\AppData\Local\Temp\LvQGODy.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  PID:2884
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3564
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:1724
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4196
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:4256
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3016
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:844
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3652
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:3312
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:424
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1416
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1212
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:3188

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:372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\LvQGODy.exe

MD5
a17dd2f7ad9f6aceffe1cebe038035af

SHA1
3e792a39abc45eb3c10084e76c8ddaeb48cb2f93

SHA256
943a8b4e4811321db2013618261ae4b7ea7ec55b78afbe0bab7123e0ba4436f1

SHA512
1f968febf046ec88644d4ddfc9ba1e4180b9dad8b671f337ded2c350bbea73d2fd25b68741a649c4e0974e0db0b5bd8520092327f6b1f65b2361d2c0db859ede

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads