Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
31-12-2024 02:24
Behavioral task
behavioral1
Sample
2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe
Resource
win10v2004-20241007-en
General
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Target
2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe
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Size
241KB
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MD5
5cdea7f9eb5668ea19690e9b06d6ee95
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SHA1
b8f82268f1ffa5c0cc09ad505836335dd96e41aa
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SHA256
cab9a9d7cc3aedfafa942f1c9fd8e79807927a8ba8d3536cc3bc6474c9b4bee1
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SHA512
523fd8da41de0cbf6e3aba83bfb9eb0d37ed0283aee332508142bc6886d0cddae68004b741485040fcb6ebd57d53d0f5cacb6b6117a2dfd9fe9d10fe01fee3cd
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SSDEEP
3072:eXq9GtSp2cyEQN0Y+w0RGp3UOHkDK7Pk1AgQsld6nGS0/MVF9nnJJEDOPMpBqxt5:eXq9eV5+w0RGEOAoUod0/OJJrtlEs
Malware Config
Extracted
C:\Users\Admin\AppData\Local\read_it.txt
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
resource yara_rule behavioral1/memory/2504-1-0x0000000000EC0000-0x0000000000F02000-memory.dmp family_chaos behavioral1/files/0x000a00000001225a-6.dat family_chaos behavioral1/memory/3012-8-0x0000000001240000-0x0000000001282000-memory.dmp family_chaos -
Chaos family
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 2780 bcdedit.exe 2840 bcdedit.exe -
pid Process 1744 wbadmin.exe -
Disables Task Manager via registry modification
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Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 3012 svchost.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" svchost.exe -
Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Ringtones\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\FP29B0EC\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\B8BOMT1Q\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\VSUVY3HP\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\INNMDE1C\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\WK3MU41S\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\U9KKHJMH\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\TN6BGAW3\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\L1J27TKW\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\pcpcrwdti.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2728 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1760 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 3012 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 3012 svchost.exe 3012 svchost.exe 3012 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe Token: SeDebugPrivilege 3012 svchost.exe Token: SeBackupPrivilege 2928 vssvc.exe Token: SeRestorePrivilege 2928 vssvc.exe Token: SeAuditPrivilege 2928 vssvc.exe Token: SeIncreaseQuotaPrivilege 2496 WMIC.exe Token: SeSecurityPrivilege 2496 WMIC.exe Token: SeTakeOwnershipPrivilege 2496 WMIC.exe Token: SeLoadDriverPrivilege 2496 WMIC.exe Token: SeSystemProfilePrivilege 2496 WMIC.exe Token: SeSystemtimePrivilege 2496 WMIC.exe Token: SeProfSingleProcessPrivilege 2496 WMIC.exe Token: SeIncBasePriorityPrivilege 2496 WMIC.exe Token: SeCreatePagefilePrivilege 2496 WMIC.exe Token: SeBackupPrivilege 2496 WMIC.exe Token: SeRestorePrivilege 2496 WMIC.exe Token: SeShutdownPrivilege 2496 WMIC.exe Token: SeDebugPrivilege 2496 WMIC.exe Token: SeSystemEnvironmentPrivilege 2496 WMIC.exe Token: SeRemoteShutdownPrivilege 2496 WMIC.exe Token: SeUndockPrivilege 2496 WMIC.exe Token: SeManageVolumePrivilege 2496 WMIC.exe Token: 33 2496 WMIC.exe Token: 34 2496 WMIC.exe Token: 35 2496 WMIC.exe Token: SeIncreaseQuotaPrivilege 2496 WMIC.exe Token: SeSecurityPrivilege 2496 WMIC.exe Token: SeTakeOwnershipPrivilege 2496 WMIC.exe Token: SeLoadDriverPrivilege 2496 WMIC.exe Token: SeSystemProfilePrivilege 2496 WMIC.exe Token: SeSystemtimePrivilege 2496 WMIC.exe Token: SeProfSingleProcessPrivilege 2496 WMIC.exe Token: SeIncBasePriorityPrivilege 2496 WMIC.exe Token: SeCreatePagefilePrivilege 2496 WMIC.exe Token: SeBackupPrivilege 2496 WMIC.exe Token: SeRestorePrivilege 2496 WMIC.exe Token: SeShutdownPrivilege 2496 WMIC.exe Token: SeDebugPrivilege 2496 WMIC.exe Token: SeSystemEnvironmentPrivilege 2496 WMIC.exe Token: SeRemoteShutdownPrivilege 2496 WMIC.exe Token: SeUndockPrivilege 2496 WMIC.exe Token: SeManageVolumePrivilege 2496 WMIC.exe Token: 33 2496 WMIC.exe Token: 34 2496 WMIC.exe Token: 35 2496 WMIC.exe Token: SeBackupPrivilege 1320 wbengine.exe Token: SeRestorePrivilege 1320 wbengine.exe Token: SeSecurityPrivilege 1320 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2504 wrote to memory of 3012 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 30 PID 2504 wrote to memory of 3012 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 30 PID 2504 wrote to memory of 3012 2504 2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe 30 PID 3012 wrote to memory of 2944 3012 svchost.exe 31 PID 3012 wrote to memory of 2944 3012 svchost.exe 31 PID 3012 wrote to memory of 2944 3012 svchost.exe 31 PID 2944 wrote to memory of 2728 2944 cmd.exe 33 PID 2944 wrote to memory of 2728 2944 cmd.exe 33 PID 2944 wrote to memory of 2728 2944 cmd.exe 33 PID 2944 wrote to memory of 2496 2944 cmd.exe 36 PID 2944 wrote to memory of 2496 2944 cmd.exe 36 PID 2944 wrote to memory of 2496 2944 cmd.exe 36 PID 3012 wrote to memory of 1492 3012 svchost.exe 38 PID 3012 wrote to memory of 1492 3012 svchost.exe 38 PID 3012 wrote to memory of 1492 3012 svchost.exe 38 PID 1492 wrote to memory of 2780 1492 cmd.exe 40 PID 1492 wrote to memory of 2780 1492 cmd.exe 40 PID 1492 wrote to memory of 2780 1492 cmd.exe 40 PID 1492 wrote to memory of 2840 1492 cmd.exe 41 PID 1492 wrote to memory of 2840 1492 cmd.exe 41 PID 1492 wrote to memory of 2840 1492 cmd.exe 41 PID 3012 wrote to memory of 1304 3012 svchost.exe 42 PID 3012 wrote to memory of 1304 3012 svchost.exe 42 PID 3012 wrote to memory of 1304 3012 svchost.exe 42 PID 1304 wrote to memory of 1744 1304 cmd.exe 44 PID 1304 wrote to memory of 1744 1304 cmd.exe 44 PID 1304 wrote to memory of 1744 1304 cmd.exe 44 PID 3012 wrote to memory of 1760 3012 svchost.exe 49 PID 3012 wrote to memory of 1760 3012 svchost.exe 49 PID 3012 wrote to memory of 1760 3012 svchost.exe 49 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-12-31_5cdea7f9eb5668ea19690e9b06d6ee95_wannacry.exe"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2504 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3012 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2944 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2728
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2496
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:1492 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2780
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2840
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1304 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1744
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1760
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2928
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1320
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2884
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1316
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Direct Volume Access
1Indicator Removal
3File Deletion
3Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
539B
MD5f721ae6805711d41783896c01220b519
SHA128e23c60755b9aaa8f97f30e196f1088cfe9bae4
SHA2564dea509b5086d5097cf965b4a8cb4ee6e2d5395a30643efd9226bed4b2796620
SHA512a019910bd9705a509ebaa78b5e4cf8e2467e380c83d7700069b1eb404f91e128bffa3f53dccfd8e1cf2a60b3749068901dd73d2c69159a7600d4615b4a3373ea
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Filesize
241KB
MD55cdea7f9eb5668ea19690e9b06d6ee95
SHA1b8f82268f1ffa5c0cc09ad505836335dd96e41aa
SHA256cab9a9d7cc3aedfafa942f1c9fd8e79807927a8ba8d3536cc3bc6474c9b4bee1
SHA512523fd8da41de0cbf6e3aba83bfb9eb0d37ed0283aee332508142bc6886d0cddae68004b741485040fcb6ebd57d53d0f5cacb6b6117a2dfd9fe9d10fe01fee3cd
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0