Analysis
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max time kernel
152s -
max time network
129s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
11-04-2024 08:53
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe
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Size
170KB
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MD5
b70b4f1a3b72fa2c76814d97b4dae493
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SHA1
6ea045b469eea3eabfed96263ff4bb97e1a6b2c3
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SHA256
dc8074b3b2a22876150975c7abf68296f232246cbbcae06d2bddc114d3a77905
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SHA512
f0906f7de8517cc0ff658ba4395d7085d16026043fa4d48482e18b16bdba4a958740e769bacbc89f4ec2aab2c7fc3e31ab0fe5002cb6ae8e7eac5e40baa751ff
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SSDEEP
3072:2HeriftL/WSo1vDb53j/8WGUzaqVh4LI8zQpn3:2+rA/WSo1rl3ALrlHQpn3
Malware Config
Extracted
C:\RyukReadMe.txt
ryuk
14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk
Signatures
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Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
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Detects command variations typically used by ransomware 42 IoCs
resource yara_rule behavioral1/memory/1116-2-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-3-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-17-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-18-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-19-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-21-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-22-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-24-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-26-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-30-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-28-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-33-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-36-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-38-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-44-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-42-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-47-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-49-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-55-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-53-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-61-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-63-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-66-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-77-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-70-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-75-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-80-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-83-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-87-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-89-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-94-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-92-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-91-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-97-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-102-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-105-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-106-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-108-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-111-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-115-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1116-367-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1192-368-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware -
Detects executables containing many references to VEEAM. Observed in ransomware 42 IoCs
resource yara_rule behavioral1/memory/1116-2-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-3-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-17-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-18-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-19-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-21-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-22-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-24-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-26-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-30-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-28-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-33-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-36-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-38-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-44-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-42-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-47-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-49-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-55-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-53-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-61-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-63-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-66-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-77-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-70-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-75-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-80-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-83-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-87-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-89-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-94-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-92-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-91-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-97-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-102-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-105-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-106-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-108-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-111-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-115-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1116-367-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM behavioral1/memory/1192-368-0x000000013FAB0000-0x000000013FE3E000-memory.dmp INDICATOR_SUSPICOUS_EXE_References_VEEAM -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe" reg.exe -
Drops file in Program Files directory 26 IoCs
description ioc Process File opened for modification C:\Program Files\7-Zip\descript.ion taskhost.exe File opened for modification C:\Program Files\7-Zip\History.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\an.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\ba.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\ca.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\da.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\7zCon.sfx taskhost.exe File opened for modification C:\Program Files\7-Zip\RyukReadMe.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\af.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\ar.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\bg.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\br.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\co.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\de.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\en.ttt taskhost.exe File opened for modification C:\Program Files\7-Zip\7-zip.chm taskhost.exe File opened for modification C:\Program Files\RyukReadMe.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\az.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\be.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\bn.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\el.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\7z.sfx taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\ast.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\cy.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\cs.txt taskhost.exe File opened for modification C:\Program Files\7-Zip\Lang\eo.txt taskhost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 1220 wrote to memory of 2740 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe 28 PID 1220 wrote to memory of 2740 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe 28 PID 1220 wrote to memory of 2740 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe 28 PID 1220 wrote to memory of 1116 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe 19 PID 2740 wrote to memory of 2484 2740 cmd.exe 30 PID 2740 wrote to memory of 2484 2740 cmd.exe 30 PID 2740 wrote to memory of 2484 2740 cmd.exe 30 PID 1220 wrote to memory of 1192 1220 2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe 20
Processes
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C:\Windows\system32\taskhost.exe"taskhost.exe"1⤵
- Drops file in Program Files directory
PID:1116
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C:\Windows\system32\Dwm.exe"C:\Windows\system32\Dwm.exe"1⤵PID:1192
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C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1220 -
C:\Windows\System32\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\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe" /f2⤵
- Suspicious use of WriteProcessMemory
PID:2740 -
C:\Windows\system32\reg.exeREG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe" /f3⤵
- Adds Run key to start application
PID:2484
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
804B
MD5cd99cba6153cbc0b14b7a849e4d0180f
SHA1375961866404a705916cbc6cd4915de7d9778923
SHA25674c43a177917b1d57ea2eaf6212ccf3b9012b4d68bc45284349443eed0bf5ee2
SHA5120c9f250c0e2ec9736b072a9807b6c3bec4b670ab2f511e65cf5d79e9a8c9a209eb91736ce2765b52b6d94a57c6aa1c16bb08e16727660699b70608439c8b7cda