Analysis
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max time kernel
119s -
max time network
128s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
08-03-2024 11:34
Behavioral task
behavioral1
Sample
2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe
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Size
25KB
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MD5
c8442c67afe3f7e280c6e61d21967012
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SHA1
29f679eaf365915eedf23f2fdb5f845d31efd423
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SHA256
d1b76aa2d80409484f1c3908adfadbe713dbf62f82765ea3317ff8210f9f1e37
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SHA512
f162dcc9f4d06d685188bde4fe58f8a74fc36acba3964170fb6fcfad22013d0ed893c8eb481ee18d7e044b4fc47755e8160c8011808adc1f9c636e74bdde70bb
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SSDEEP
384:zYenjLLAyI/1B7mwOcqNHPj6ABmFWcOVp91YWUxDG/:azfqweWbc9etxD8
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt
19ZMqCng2FjuoDkCZQMvVuMaaW7V19komh
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/2208-0-0x00000000013D0000-0x00000000013DC000-memory.dmp family_chaos behavioral1/files/0x000d0000000122c7-5.dat family_chaos behavioral1/memory/1616-7-0x00000000008A0000-0x00000000008AC000-memory.dmp family_chaos -
Deletes shadow copies 2 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/2208-0-0x00000000013D0000-0x00000000013DC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/files/0x000d0000000122c7-5.dat INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/1616-7-0x00000000008A0000-0x00000000008AC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware -
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 2396 bcdedit.exe 1944 bcdedit.exe -
Renames multiple (174) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2652 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 1616 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\Roaming\Microsoft\Internet Explorer\Quick Launch\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\Local\Microsoft\Feeds Cache\JQHF6B80\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZKWCFGN8\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\Downloads\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\CJQLK5UF\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\Y3HLRHFA\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Ringtones\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\3DCZZ4GN\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Music\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\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\Temporary Internet Files\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\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\All Users\Microsoft\Windows\Start Menu\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 F:\$RECYCLE.BIN\S-1-5-21-1658372521-4246568289-2509113762-1000\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\Favorites\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\Admin\AppData\Local\Microsoft\Feeds Cache\5B8DS9TT\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Startup\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\Recent\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\Public\Recorded TV\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\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Z9MW37VJ\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\Public\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\System Tools\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\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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 2668 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2140 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1616 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2208 2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe 2208 2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe 1616 svchost.exe 1616 svchost.exe 1616 svchost.exe 1616 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2208 2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 1616 svchost.exe Token: SeBackupPrivilege 2708 vssvc.exe Token: SeRestorePrivilege 2708 vssvc.exe Token: SeAuditPrivilege 2708 vssvc.exe Token: SeIncreaseQuotaPrivilege 2416 WMIC.exe Token: SeSecurityPrivilege 2416 WMIC.exe Token: SeTakeOwnershipPrivilege 2416 WMIC.exe Token: SeLoadDriverPrivilege 2416 WMIC.exe Token: SeSystemProfilePrivilege 2416 WMIC.exe Token: SeSystemtimePrivilege 2416 WMIC.exe Token: SeProfSingleProcessPrivilege 2416 WMIC.exe Token: SeIncBasePriorityPrivilege 2416 WMIC.exe Token: SeCreatePagefilePrivilege 2416 WMIC.exe Token: SeBackupPrivilege 2416 WMIC.exe Token: SeRestorePrivilege 2416 WMIC.exe Token: SeShutdownPrivilege 2416 WMIC.exe Token: SeDebugPrivilege 2416 WMIC.exe Token: SeSystemEnvironmentPrivilege 2416 WMIC.exe Token: SeRemoteShutdownPrivilege 2416 WMIC.exe Token: SeUndockPrivilege 2416 WMIC.exe Token: SeManageVolumePrivilege 2416 WMIC.exe Token: 33 2416 WMIC.exe Token: 34 2416 WMIC.exe Token: 35 2416 WMIC.exe Token: SeIncreaseQuotaPrivilege 2416 WMIC.exe Token: SeSecurityPrivilege 2416 WMIC.exe Token: SeTakeOwnershipPrivilege 2416 WMIC.exe Token: SeLoadDriverPrivilege 2416 WMIC.exe Token: SeSystemProfilePrivilege 2416 WMIC.exe Token: SeSystemtimePrivilege 2416 WMIC.exe Token: SeProfSingleProcessPrivilege 2416 WMIC.exe Token: SeIncBasePriorityPrivilege 2416 WMIC.exe Token: SeCreatePagefilePrivilege 2416 WMIC.exe Token: SeBackupPrivilege 2416 WMIC.exe Token: SeRestorePrivilege 2416 WMIC.exe Token: SeShutdownPrivilege 2416 WMIC.exe Token: SeDebugPrivilege 2416 WMIC.exe Token: SeSystemEnvironmentPrivilege 2416 WMIC.exe Token: SeRemoteShutdownPrivilege 2416 WMIC.exe Token: SeUndockPrivilege 2416 WMIC.exe Token: SeManageVolumePrivilege 2416 WMIC.exe Token: 33 2416 WMIC.exe Token: 34 2416 WMIC.exe Token: 35 2416 WMIC.exe Token: SeBackupPrivilege 2800 wbengine.exe Token: SeRestorePrivilege 2800 wbengine.exe Token: SeSecurityPrivilege 2800 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2208 wrote to memory of 1616 2208 2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe 28 PID 2208 wrote to memory of 1616 2208 2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe 28 PID 2208 wrote to memory of 1616 2208 2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe 28 PID 1616 wrote to memory of 1500 1616 svchost.exe 29 PID 1616 wrote to memory of 1500 1616 svchost.exe 29 PID 1616 wrote to memory of 1500 1616 svchost.exe 29 PID 1500 wrote to memory of 2668 1500 cmd.exe 31 PID 1500 wrote to memory of 2668 1500 cmd.exe 31 PID 1500 wrote to memory of 2668 1500 cmd.exe 31 PID 1500 wrote to memory of 2416 1500 cmd.exe 34 PID 1500 wrote to memory of 2416 1500 cmd.exe 34 PID 1500 wrote to memory of 2416 1500 cmd.exe 34 PID 1616 wrote to memory of 1780 1616 svchost.exe 36 PID 1616 wrote to memory of 1780 1616 svchost.exe 36 PID 1616 wrote to memory of 1780 1616 svchost.exe 36 PID 1780 wrote to memory of 2396 1780 cmd.exe 38 PID 1780 wrote to memory of 2396 1780 cmd.exe 38 PID 1780 wrote to memory of 2396 1780 cmd.exe 38 PID 1780 wrote to memory of 1944 1780 cmd.exe 39 PID 1780 wrote to memory of 1944 1780 cmd.exe 39 PID 1780 wrote to memory of 1944 1780 cmd.exe 39 PID 1616 wrote to memory of 320 1616 svchost.exe 40 PID 1616 wrote to memory of 320 1616 svchost.exe 40 PID 1616 wrote to memory of 320 1616 svchost.exe 40 PID 320 wrote to memory of 2652 320 cmd.exe 42 PID 320 wrote to memory of 2652 320 cmd.exe 42 PID 320 wrote to memory of 2652 320 cmd.exe 42 PID 1616 wrote to memory of 2140 1616 svchost.exe 48 PID 1616 wrote to memory of 2140 1616 svchost.exe 48 PID 1616 wrote to memory of 2140 1616 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\2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-08_c8442c67afe3f7e280c6e61d21967012_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2208 -
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:1616 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1500 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2668
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2416
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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:1780 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2396
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1944
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:320 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2652
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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:2140
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2708
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2800
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1464
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:884
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
733B
MD53d6814cd217fc6a01c9ab54ea869f562
SHA15a416a63e739fc8abcb794eff2ff1966e9926746
SHA2563c2dcb23d4b73e8ce0b2e8e94c312c78a673b23ecab6c7bb98b61db7fb1aeb57
SHA512729a69f699e8d60d1810b6b101c6ec92cd6f3d735084901d309660e5f75a25f045c04e2c09f46fe8402dd1af19317ea2abfe6020ee321f8f3dde8fd1b3b48a80
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
25KB
MD5c8442c67afe3f7e280c6e61d21967012
SHA129f679eaf365915eedf23f2fdb5f845d31efd423
SHA256d1b76aa2d80409484f1c3908adfadbe713dbf62f82765ea3317ff8210f9f1e37
SHA512f162dcc9f4d06d685188bde4fe58f8a74fc36acba3964170fb6fcfad22013d0ed893c8eb481ee18d7e044b4fc47755e8160c8011808adc1f9c636e74bdde70bb