Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
04-06-2024 23:25
Behavioral task
behavioral1
Sample
2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe
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Size
26KB
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MD5
3fff2238987f726ab33c7092c8741d28
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SHA1
a066d01132b678838e80e1f064b6063211e86864
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SHA256
c4d530c93203f70224ead8aa3c45239095580883ba39a44ecd9f9346eeda75eb
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SHA512
77a0b9c1294ec12cb64824b8c69a2bd5f00459068961d8e40463bbb536de9fa812334f309f09a05edd52387eedcbb8fad54760a281c24e1d03e5be672472c34f
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SSDEEP
384:cwYenjLLAG9rPOBXb0SABdxOVp91fcfIb5WxDGF:O+ruXcc9pcfIbMxDK
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt
chaos
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/3060-1-0x00000000010E0000-0x00000000010EC000-memory.dmp family_chaos behavioral1/files/0x000a000000015f7a-4.dat family_chaos behavioral1/memory/2524-7-0x0000000000F20000-0x0000000000F2C000-memory.dmp family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Detects command variations typically used by ransomware 3 IoCs
resource yara_rule behavioral1/memory/3060-1-0x00000000010E0000-0x00000000010EC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/files/0x000a000000015f7a-4.dat INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/2524-7-0x0000000000F20000-0x0000000000F2C000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware -
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 2516 bcdedit.exe 2560 bcdedit.exe -
pid Process 2108 wbadmin.exe -
Disables Task Manager via registry modification
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Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe 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 2524 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\0U93YK0N\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\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\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\All Users\Microsoft\Windows\Start Menu\Programs\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\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\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Recorded TV\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\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\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\CMDLW4SJ\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\4XCMPANZ\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Saved Games\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\FW0P2MZH\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\2GIU3NG8\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\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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 F:\$RECYCLE.BIN\S-1-5-21-3627615824-4061627003-3019543961-1000\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\AppData\Local\Microsoft\Feeds Cache\BP3UABCB\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\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Public\Pictures\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\JJ7YKCO8\desktop.ini 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 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 3052 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2920 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2524 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3060 2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe 3060 2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe 2524 svchost.exe 2524 svchost.exe 2524 svchost.exe 2524 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 3060 2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 2524 svchost.exe Token: SeBackupPrivilege 2160 vssvc.exe Token: SeRestorePrivilege 2160 vssvc.exe Token: SeAuditPrivilege 2160 vssvc.exe Token: SeIncreaseQuotaPrivilege 2812 WMIC.exe Token: SeSecurityPrivilege 2812 WMIC.exe Token: SeTakeOwnershipPrivilege 2812 WMIC.exe Token: SeLoadDriverPrivilege 2812 WMIC.exe Token: SeSystemProfilePrivilege 2812 WMIC.exe Token: SeSystemtimePrivilege 2812 WMIC.exe Token: SeProfSingleProcessPrivilege 2812 WMIC.exe Token: SeIncBasePriorityPrivilege 2812 WMIC.exe Token: SeCreatePagefilePrivilege 2812 WMIC.exe Token: SeBackupPrivilege 2812 WMIC.exe Token: SeRestorePrivilege 2812 WMIC.exe Token: SeShutdownPrivilege 2812 WMIC.exe Token: SeDebugPrivilege 2812 WMIC.exe Token: SeSystemEnvironmentPrivilege 2812 WMIC.exe Token: SeRemoteShutdownPrivilege 2812 WMIC.exe Token: SeUndockPrivilege 2812 WMIC.exe Token: SeManageVolumePrivilege 2812 WMIC.exe Token: 33 2812 WMIC.exe Token: 34 2812 WMIC.exe Token: 35 2812 WMIC.exe Token: SeIncreaseQuotaPrivilege 2812 WMIC.exe Token: SeSecurityPrivilege 2812 WMIC.exe Token: SeTakeOwnershipPrivilege 2812 WMIC.exe Token: SeLoadDriverPrivilege 2812 WMIC.exe Token: SeSystemProfilePrivilege 2812 WMIC.exe Token: SeSystemtimePrivilege 2812 WMIC.exe Token: SeProfSingleProcessPrivilege 2812 WMIC.exe Token: SeIncBasePriorityPrivilege 2812 WMIC.exe Token: SeCreatePagefilePrivilege 2812 WMIC.exe Token: SeBackupPrivilege 2812 WMIC.exe Token: SeRestorePrivilege 2812 WMIC.exe Token: SeShutdownPrivilege 2812 WMIC.exe Token: SeDebugPrivilege 2812 WMIC.exe Token: SeSystemEnvironmentPrivilege 2812 WMIC.exe Token: SeRemoteShutdownPrivilege 2812 WMIC.exe Token: SeUndockPrivilege 2812 WMIC.exe Token: SeManageVolumePrivilege 2812 WMIC.exe Token: 33 2812 WMIC.exe Token: 34 2812 WMIC.exe Token: 35 2812 WMIC.exe Token: SeBackupPrivilege 2004 wbengine.exe Token: SeRestorePrivilege 2004 wbengine.exe Token: SeSecurityPrivilege 2004 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 3060 wrote to memory of 2524 3060 2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe 28 PID 3060 wrote to memory of 2524 3060 2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe 28 PID 3060 wrote to memory of 2524 3060 2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe 28 PID 2524 wrote to memory of 2036 2524 svchost.exe 29 PID 2524 wrote to memory of 2036 2524 svchost.exe 29 PID 2524 wrote to memory of 2036 2524 svchost.exe 29 PID 2036 wrote to memory of 3052 2036 cmd.exe 31 PID 2036 wrote to memory of 3052 2036 cmd.exe 31 PID 2036 wrote to memory of 3052 2036 cmd.exe 31 PID 2036 wrote to memory of 2812 2036 cmd.exe 34 PID 2036 wrote to memory of 2812 2036 cmd.exe 34 PID 2036 wrote to memory of 2812 2036 cmd.exe 34 PID 2524 wrote to memory of 2456 2524 svchost.exe 36 PID 2524 wrote to memory of 2456 2524 svchost.exe 36 PID 2524 wrote to memory of 2456 2524 svchost.exe 36 PID 2456 wrote to memory of 2516 2456 cmd.exe 38 PID 2456 wrote to memory of 2516 2456 cmd.exe 38 PID 2456 wrote to memory of 2516 2456 cmd.exe 38 PID 2456 wrote to memory of 2560 2456 cmd.exe 39 PID 2456 wrote to memory of 2560 2456 cmd.exe 39 PID 2456 wrote to memory of 2560 2456 cmd.exe 39 PID 2524 wrote to memory of 2824 2524 svchost.exe 40 PID 2524 wrote to memory of 2824 2524 svchost.exe 40 PID 2524 wrote to memory of 2824 2524 svchost.exe 40 PID 2824 wrote to memory of 2108 2824 cmd.exe 42 PID 2824 wrote to memory of 2108 2824 cmd.exe 42 PID 2824 wrote to memory of 2108 2824 cmd.exe 42 PID 2524 wrote to memory of 2920 2524 svchost.exe 48 PID 2524 wrote to memory of 2920 2524 svchost.exe 48 PID 2524 wrote to memory of 2920 2524 svchost.exe 48 -
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\2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_3fff2238987f726ab33c7092c8741d28_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3060 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2036 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:3052
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2812
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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:2456 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2516
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2560
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2824 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2108
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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:2920
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2160
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2004
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1088
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2332
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
26KB
MD53fff2238987f726ab33c7092c8741d28
SHA1a066d01132b678838e80e1f064b6063211e86864
SHA256c4d530c93203f70224ead8aa3c45239095580883ba39a44ecd9f9346eeda75eb
SHA51277a0b9c1294ec12cb64824b8c69a2bd5f00459068961d8e40463bbb536de9fa812334f309f09a05edd52387eedcbb8fad54760a281c24e1d03e5be672472c34f