ryuk | 300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83

Analysis

max time kernel
197s
max time network
193s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
20-02-2022 08:47

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General

Target

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
Size

1.4MB
MD5

82b1966d0d47be793b1dacf5449d5dd4
SHA1

f5e64f4122242c7b4068b83eaf31ce0f0806a746
SHA256

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83
SHA512

1986630db561bcff63186e2cf3ccef34aa6a07d5286766507e31315cb57c981055b1843489b883559973d5998e482149a4ede78bcf049d96c5352b133e58f795

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]

Extracted

Path

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

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Signatures

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

Processes:

LilTEpX.exe

pid process

392 LilTEpX.exe

pid	process
392	LilTEpX.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:

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exeLilTEpX.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	LilTEpX.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 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

MusNotifyIcon.exeMusNotifyIcon.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
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 3 IoCs

Processes:

svchost.exe

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

Runs net.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exeLilTEpX.exe

pid	process
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
392	LilTEpX.exe
392	LilTEpX.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
392	LilTEpX.exe
392	LilTEpX.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exeLilTEpX.exe

description	pid	process
Token: SeBackupPrivilege	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
Token: SeBackupPrivilege	392	LilTEpX.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exeLilTEpX.exenet.exenet.exenet.exenet.exenet.exenet.exenet.exenet.exenet.exenet.exe

description	pid	process	target process
PID 2096 wrote to memory of 392	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	LilTEpX.exe
PID 2096 wrote to memory of 392	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	LilTEpX.exe
PID 2096 wrote to memory of 392	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	LilTEpX.exe
PID 2096 wrote to memory of 1072	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 1072	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 1072	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 1816	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 1816	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 1816	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 544	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 544	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 544	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 392 wrote to memory of 364	392	LilTEpX.exe	net.exe
PID 392 wrote to memory of 364	392	LilTEpX.exe	net.exe
PID 392 wrote to memory of 364	392	LilTEpX.exe	net.exe
PID 2096 wrote to memory of 396	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 396	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 396	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 392 wrote to memory of 2808	392	LilTEpX.exe	net.exe
PID 392 wrote to memory of 2808	392	LilTEpX.exe	net.exe
PID 392 wrote to memory of 2808	392	LilTEpX.exe	net.exe
PID 1072 wrote to memory of 2452	1072	net.exe	net1.exe
PID 1072 wrote to memory of 2452	1072	net.exe	net1.exe
PID 1072 wrote to memory of 2452	1072	net.exe	net1.exe
PID 544 wrote to memory of 688	544	net.exe	net1.exe
PID 544 wrote to memory of 688	544	net.exe	net1.exe
PID 544 wrote to memory of 688	544	net.exe	net1.exe
PID 1816 wrote to memory of 3888	1816	net.exe	net1.exe
PID 1816 wrote to memory of 3888	1816	net.exe	net1.exe
PID 1816 wrote to memory of 3888	1816	net.exe	net1.exe
PID 2808 wrote to memory of 3600	2808	net.exe	net1.exe
PID 2808 wrote to memory of 3600	2808	net.exe	net1.exe
PID 2808 wrote to memory of 3600	2808	net.exe	net1.exe
PID 396 wrote to memory of 2848	396	net.exe	net1.exe
PID 396 wrote to memory of 2848	396	net.exe	net1.exe
PID 396 wrote to memory of 2848	396	net.exe	net1.exe
PID 364 wrote to memory of 1880	364	net.exe	net1.exe
PID 364 wrote to memory of 1880	364	net.exe	net1.exe
PID 364 wrote to memory of 1880	364	net.exe	net1.exe
PID 2096 wrote to memory of 3452	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 3452	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 3452	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 2924	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 2924	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 2924	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 3452 wrote to memory of 2576	3452	net.exe	net1.exe
PID 3452 wrote to memory of 2576	3452	net.exe	net1.exe
PID 3452 wrote to memory of 2576	3452	net.exe	net1.exe
PID 2924 wrote to memory of 2104	2924	net.exe	net1.exe
PID 2924 wrote to memory of 2104	2924	net.exe	net1.exe
PID 2924 wrote to memory of 2104	2924	net.exe	net1.exe
PID 2096 wrote to memory of 4248	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 4248	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 4248	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 4260	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 4260	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 2096 wrote to memory of 4260	2096	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	net.exe
PID 4248 wrote to memory of 2416	4248	net.exe	net1.exe
PID 4248 wrote to memory of 2416	4248	net.exe	net1.exe
PID 4248 wrote to memory of 2416	4248	net.exe	net1.exe
PID 4260 wrote to memory of 1160	4260	net.exe	net1.exe
PID 4260 wrote to memory of 1160	4260	net.exe	net1.exe
PID 4260 wrote to memory of 1160	4260	net.exe	net1.exe
PID 392 wrote to memory of 5648	392	LilTEpX.exe	net.exe

C:\Users\Admin\AppData\Local\Temp\300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
"C:\Users\Admin\AppData\Local\Temp\300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Users\Admin\AppData\Local\Temp\LilTEpX.exe
  "C:\Users\Admin\AppData\Local\Temp\LilTEpX.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:392
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:364
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:1880
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2808
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:3600
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    PID:5648
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:5744
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:5668
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:5756
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1072
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2452
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1816
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:3888
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:688
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:396
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2848
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2104
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3452
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2576
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4248
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2416
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4260
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1160

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:3128

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p
1⤵
- Modifies data under HKEY_USERS
PID:5124

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
1⤵
- Checks processor information in registry
PID:5604

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

Replay Monitor

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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\LilTEpX.exe

MD5
82b1966d0d47be793b1dacf5449d5dd4

SHA1
f5e64f4122242c7b4068b83eaf31ce0f0806a746

SHA256
300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83

SHA512
1986630db561bcff63186e2cf3ccef34aa6a07d5286766507e31315cb57c981055b1843489b883559973d5998e482149a4ede78bcf049d96c5352b133e58f795

Download Submit
C:\Users\Admin\AppData\Local\Temp\LilTEpX.exe

MD5
82b1966d0d47be793b1dacf5449d5dd4

SHA1
f5e64f4122242c7b4068b83eaf31ce0f0806a746

SHA256
300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83

SHA512
1986630db561bcff63186e2cf3ccef34aa6a07d5286766507e31315cb57c981055b1843489b883559973d5998e482149a4ede78bcf049d96c5352b133e58f795

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

MD5
62429300ef3f095ae37a58b737c60ab5

SHA1
6036c4e454eb6fed69504e7a5ae2227153757e93

SHA256
dbcb799862fb04f74c3a3fd880a35a3f87c1a5d87ee57235f84c33bf51a97b46

SHA512
028db4e3928a3d7a4eb7377a423d700e1c9c52c0da147690ae3d373274e08b20896d4732b1e647f441be74fce9dafa5f17434f79bdb977595a635a7cafd182a4

Download Submit