ryuk | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9

General

Target

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
Size

191KB
MD5

708f63f5ef0bafa61743f242f470480f
SHA1

96233bf3b488a31852b8e32f7cb91dd5d935f9c2
SHA256

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9
SHA512

5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9

Score

10^/10

ryuk persistence 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:

QUkJTEr.exe

pid process

1660 QUkJTEr.exe

pid	process
1660	QUkJTEr.exe

Loads dropped DLL 2 IoCs

Processes:

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

pid	process
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exereg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\QUkJTEr.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"	reg.exe

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

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exeQUkJTEr.exe

pid	process
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1660	QUkJTEr.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1660	QUkJTEr.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exeQUkJTEr.exe

description	pid	process
Token: SeDebugPrivilege	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
Token: SeBackupPrivilege	1660	QUkJTEr.exe
Token: SeBackupPrivilege	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exeQUkJTEr.exenet.exenet.exenet.exenet.exenet.execmd.exenet.exe

description	pid	process	target process
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	QUkJTEr.exe
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	QUkJTEr.exe
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	QUkJTEr.exe
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	QUkJTEr.exe
PID 1700 wrote to memory of 1108	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	taskhost.exe
PID 1700 wrote to memory of 1172	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	Dwm.exe
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	net.exe
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	cmd.exe
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	cmd.exe
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	cmd.exe
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	cmd.exe
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	net.exe
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	net.exe
PID 1816 wrote to memory of 1680	1816	net.exe	net1.exe
PID 1816 wrote to memory of 1680	1816	net.exe	net1.exe
PID 1816 wrote to memory of 1680	1816	net.exe	net1.exe
PID 1816 wrote to memory of 1680	1816	net.exe	net1.exe
PID 1156 wrote to memory of 1548	1156	net.exe	net1.exe
PID 1156 wrote to memory of 1548	1156	net.exe	net1.exe
PID 1156 wrote to memory of 1548	1156	net.exe	net1.exe
PID 1156 wrote to memory of 1548	1156	net.exe	net1.exe
PID 528 wrote to memory of 1668	528	net.exe	net1.exe
PID 528 wrote to memory of 1668	528	net.exe	net1.exe
PID 528 wrote to memory of 1668	528	net.exe	net1.exe
PID 528 wrote to memory of 1668	528	net.exe	net1.exe
PID 1864 wrote to memory of 1620	1864	net.exe	net1.exe
PID 1864 wrote to memory of 1620	1864	net.exe	net1.exe
PID 1864 wrote to memory of 1620	1864	net.exe	net1.exe
PID 1864 wrote to memory of 1620	1864	net.exe	net1.exe
PID 1488 wrote to memory of 1336	1488	net.exe	net1.exe
PID 1488 wrote to memory of 1336	1488	net.exe	net1.exe
PID 1488 wrote to memory of 1336	1488	net.exe	net1.exe
PID 1488 wrote to memory of 1336	1488	net.exe	net1.exe
PID 1860 wrote to memory of 1868	1860	cmd.exe	reg.exe
PID 1860 wrote to memory of 1868	1860	cmd.exe	reg.exe
PID 1860 wrote to memory of 1868	1860	cmd.exe	reg.exe
PID 1860 wrote to memory of 1868	1860	cmd.exe	reg.exe
PID 1904 wrote to memory of 916	1904	net.exe	net1.exe
PID 1904 wrote to memory of 916	1904	net.exe	net1.exe
PID 1904 wrote to memory of 916	1904	net.exe	net1.exe
PID 1904 wrote to memory of 916	1904	net.exe	net1.exe
PID 1660 wrote to memory of 3064	1660	QUkJTEr.exe	cmd.exe
PID 1660 wrote to memory of 3064	1660	QUkJTEr.exe	cmd.exe

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1108

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1172

C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
"C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1700

C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
"C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" 8 LAN
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1660

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
3⤵
- Suspicious use of WriteProcessMemory
PID:1864

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
4⤵
PID:1620

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
3⤵
- Suspicious use of WriteProcessMemory
PID:1904

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
4⤵
PID:916

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" /f /reg:64
3⤵
PID:3064

C:\Windows\SysWOW64\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" /f /reg:64
4⤵
- Adds Run key to start application
PID:932

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
3⤵
PID:36236

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
4⤵
PID:36272

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:528

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
3⤵
PID:1668

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:1488

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:1336

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:1816

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
3⤵
PID:1680

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:1156

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:1548

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
2⤵
- Suspicious use of WriteProcessMemory
PID:1860

C:\Windows\SysWOW64\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
3⤵
- Adds Run key to start application
PID:1868

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
PID:4304

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:4328

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
PID:4752

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:4976

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
PID:36384

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:36504

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
PID:36740

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:36020

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys\08e575673cce10c72090304839888e02_3bd845b8-ce6a-4337-9974-31490196462a
MD5
93a5aadeec082ffc1bca5aa27af70f52

SHA1
47a92aee3ea4d1c1954ed4da9f86dd79d9277d31

SHA256
a1a21799e98f97f271657ce656076f33dcb020d9370f1f2671d783cafd230294

SHA512
df388c8d83e779e006d6311b2046fcf9259ec33d379fc0e2c6a4b6b90418f587a12c5c23acd488413a02568ca2d3effe04608ec7c791925c7ed53dc71093ca45

Download Submit
C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
MD5
708f63f5ef0bafa61743f242f470480f

SHA1
96233bf3b488a31852b8e32f7cb91dd5d935f9c2

SHA256
7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9

SHA512
5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9

Download Submit
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
MD5
b99d47f48bba763d4eded8882f9d3fae

SHA1
aa0b195e158e91b93ea7aa97c3f02461b86b0163

SHA256
577cfa8bd59e6c4b007b33f03fffe15adf180ca48b121bfe6a837cf481a234fb

SHA512
ce3186e760f8c441a14a01cb52ed147985946d5a672095024aade10db7238ef38ee71fecbe2b3266a0c5018f694c79f28e4a87849861c1ba74a307240548714b

Download Submit
\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
MD5
708f63f5ef0bafa61743f242f470480f

SHA1
96233bf3b488a31852b8e32f7cb91dd5d935f9c2

SHA256
7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9

SHA512
5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9

Download Submit
\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
MD5
708f63f5ef0bafa61743f242f470480f

SHA1
96233bf3b488a31852b8e32f7cb91dd5d935f9c2

SHA256
7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9

SHA512
5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9

Download Submit
memory/1108-60-0x0000000030000000-0x0000000030170000-memory.dmp

Filesize
1.4MB

Download
memory/1700-55-0x0000000075F91000-0x0000000075F93000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads