ryuk | a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672

Analysis

max time kernel
180s
max time network
198s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
20-02-2022 03:32

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General

Target

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
Size

168KB
MD5

966251a415b5abbf2d4b9699abde3fe8
SHA1

e63c35c79badc0a6846ed33a9f30eeda66698350
SHA256

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672
SHA512

d47b1ab889550af3bb826fefedb9164f6670269897bb02f01f970fb6e8b32d26c464fa3e0a2771257b2dd3cc5652665796c3aa5a2f326dc528fa30d89f244886

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> [email protected] </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

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 1 IoCs

Processes:

svchost.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

pid	process
1840	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
1840	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

description pid process

Token: SeBackupPrivilege 1840 a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

description	pid	process
Token: SeBackupPrivilege	1840	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

C:\Users\Admin\AppData\Local\Temp\a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
"C:\Users\Admin\AppData\Local\Temp\a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1840

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:3964

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p
1⤵
- Modifies data under HKEY_USERS
PID:1584

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads