Analysis
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max time kernel
118s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system -
submitted
31-12-2024 12:25
Behavioral task
behavioral1
Sample
2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe
Resource
win10v2004-20241007-en
General
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Target
2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe
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Size
26KB
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MD5
8bf868fabc091039582a261c723dd1ad
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SHA1
7579259cc2c1bdf94dae89d63466c549475bace6
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SHA256
b633fac89696e7455bd53671f2d2cdf9495aa707be389108760ca603c39f8f33
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SHA512
dca340f2ba8e30d42ec717316ea736cfdb71ff4274f6f9732c6d6c772f231ae005399681e7212177dbda83f9a3bb3328e8c1d4733cad37485fab68cbdbeca32f
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SSDEEP
384:pYenjLLAFXrPOn6oZdieYSGdaOVp91iMfIb56xDGR:oNry6oZlc90qIbExDm
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/1952-1-0x0000000000E30000-0x0000000000E3C000-memory.dmp family_chaos behavioral1/files/0x00080000000120f9-5.dat family_chaos behavioral1/memory/2352-7-0x0000000000180000-0x000000000018C000-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 2204 bcdedit.exe 2476 bcdedit.exe -
pid Process 2924 wbadmin.exe -
Disables Task Manager via registry modification
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Drops startup file 3 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 File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2352 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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Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\MYC3PENY\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Admin\AppData\Local\Microsoft\Feeds Cache\63WZ73PY\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\Music\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\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\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\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\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\YQ90JXIE\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\Feeds Cache\7CO3PKGI\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\L2BFB2JG\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\R9C9T5AL\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\Downloads\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\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\IQBL5G2Z\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\SendTo\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\Windows\History\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ROVWYKHE\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Programs\Administrative Tools\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\All Users\Microsoft\Windows\Start Menu\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\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\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 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2548 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2688 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2352 svchost.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe 2352 svchost.exe 2352 svchost.exe 2352 svchost.exe 2352 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 2352 svchost.exe Token: SeBackupPrivilege 2184 vssvc.exe Token: SeRestorePrivilege 2184 vssvc.exe Token: SeAuditPrivilege 2184 vssvc.exe Token: SeIncreaseQuotaPrivilege 2756 WMIC.exe Token: SeSecurityPrivilege 2756 WMIC.exe Token: SeTakeOwnershipPrivilege 2756 WMIC.exe Token: SeLoadDriverPrivilege 2756 WMIC.exe Token: SeSystemProfilePrivilege 2756 WMIC.exe Token: SeSystemtimePrivilege 2756 WMIC.exe Token: SeProfSingleProcessPrivilege 2756 WMIC.exe Token: SeIncBasePriorityPrivilege 2756 WMIC.exe Token: SeCreatePagefilePrivilege 2756 WMIC.exe Token: SeBackupPrivilege 2756 WMIC.exe Token: SeRestorePrivilege 2756 WMIC.exe Token: SeShutdownPrivilege 2756 WMIC.exe Token: SeDebugPrivilege 2756 WMIC.exe Token: SeSystemEnvironmentPrivilege 2756 WMIC.exe Token: SeRemoteShutdownPrivilege 2756 WMIC.exe Token: SeUndockPrivilege 2756 WMIC.exe Token: SeManageVolumePrivilege 2756 WMIC.exe Token: 33 2756 WMIC.exe Token: 34 2756 WMIC.exe Token: 35 2756 WMIC.exe Token: SeIncreaseQuotaPrivilege 2756 WMIC.exe Token: SeSecurityPrivilege 2756 WMIC.exe Token: SeTakeOwnershipPrivilege 2756 WMIC.exe Token: SeLoadDriverPrivilege 2756 WMIC.exe Token: SeSystemProfilePrivilege 2756 WMIC.exe Token: SeSystemtimePrivilege 2756 WMIC.exe Token: SeProfSingleProcessPrivilege 2756 WMIC.exe Token: SeIncBasePriorityPrivilege 2756 WMIC.exe Token: SeCreatePagefilePrivilege 2756 WMIC.exe Token: SeBackupPrivilege 2756 WMIC.exe Token: SeRestorePrivilege 2756 WMIC.exe Token: SeShutdownPrivilege 2756 WMIC.exe Token: SeDebugPrivilege 2756 WMIC.exe Token: SeSystemEnvironmentPrivilege 2756 WMIC.exe Token: SeRemoteShutdownPrivilege 2756 WMIC.exe Token: SeUndockPrivilege 2756 WMIC.exe Token: SeManageVolumePrivilege 2756 WMIC.exe Token: 33 2756 WMIC.exe Token: 34 2756 WMIC.exe Token: 35 2756 WMIC.exe Token: SeBackupPrivilege 2884 wbengine.exe Token: SeRestorePrivilege 2884 wbengine.exe Token: SeSecurityPrivilege 2884 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1952 wrote to memory of 2352 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe 30 PID 1952 wrote to memory of 2352 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe 30 PID 1952 wrote to memory of 2352 1952 2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe 30 PID 2352 wrote to memory of 1864 2352 svchost.exe 31 PID 2352 wrote to memory of 1864 2352 svchost.exe 31 PID 2352 wrote to memory of 1864 2352 svchost.exe 31 PID 1864 wrote to memory of 2548 1864 cmd.exe 33 PID 1864 wrote to memory of 2548 1864 cmd.exe 33 PID 1864 wrote to memory of 2548 1864 cmd.exe 33 PID 1864 wrote to memory of 2756 1864 cmd.exe 36 PID 1864 wrote to memory of 2756 1864 cmd.exe 36 PID 1864 wrote to memory of 2756 1864 cmd.exe 36 PID 2352 wrote to memory of 2404 2352 svchost.exe 38 PID 2352 wrote to memory of 2404 2352 svchost.exe 38 PID 2352 wrote to memory of 2404 2352 svchost.exe 38 PID 2404 wrote to memory of 2204 2404 cmd.exe 40 PID 2404 wrote to memory of 2204 2404 cmd.exe 40 PID 2404 wrote to memory of 2204 2404 cmd.exe 40 PID 2404 wrote to memory of 2476 2404 cmd.exe 41 PID 2404 wrote to memory of 2476 2404 cmd.exe 41 PID 2404 wrote to memory of 2476 2404 cmd.exe 41 PID 2352 wrote to memory of 2160 2352 svchost.exe 42 PID 2352 wrote to memory of 2160 2352 svchost.exe 42 PID 2352 wrote to memory of 2160 2352 svchost.exe 42 PID 2160 wrote to memory of 2924 2160 cmd.exe 44 PID 2160 wrote to memory of 2924 2160 cmd.exe 44 PID 2160 wrote to memory of 2924 2160 cmd.exe 44 PID 2352 wrote to memory of 2688 2352 svchost.exe 49 PID 2352 wrote to memory of 2688 2352 svchost.exe 49 PID 2352 wrote to memory of 2688 2352 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_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-12-31_8bf868fabc091039582a261c723dd1ad_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1952 -
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:2352 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1864 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2548
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2756
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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:2404 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2204
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2476
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2160 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2924
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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:2688
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2184
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2884
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2916
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2944
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
962B
MD51a31305937bebce0ccfb0e6142831452
SHA174d6e8aed55286c66b2dd15cf16c5ee53056b1c9
SHA25662d5d9737197180da1404755041db64f82667b9bb4ae6ff6619b252ab5cb1695
SHA51267d2155954a133e395084a5fe38adbe923a99603ffffcf1981c942f4f87d1b914808a210c33c10e59eef06873d73de62e2ccaabccd88a8e1055e90a6985be3c5
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
26KB
MD58bf868fabc091039582a261c723dd1ad
SHA17579259cc2c1bdf94dae89d63466c549475bace6
SHA256b633fac89696e7455bd53671f2d2cdf9495aa707be389108760ca603c39f8f33
SHA512dca340f2ba8e30d42ec717316ea736cfdb71ff4274f6f9732c6d6c772f231ae005399681e7212177dbda83f9a3bb3328e8c1d4733cad37485fab68cbdbeca32f