Analysis
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max time kernel
63s -
max time network
33s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
01/06/2023, 16:49
Behavioral task
behavioral1
Sample
333333.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
333333.exe
Resource
win10v2004-20230220-en
General
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Target
333333.exe
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Size
29KB
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MD5
df47134780d2ae126fec89f9f246d0e7
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SHA1
25806ed7b5ba0284d1ac6858b0f49db39f834b16
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SHA256
3f8db4913ef08a02254be20bd04543b55be72cb97f5de3cfd1d773c140abed2a
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SHA512
388e220da35f134274bfbc68acb675eab70987fe422e9aa4d5cb581ac6db42a6695142f9d8e59edb12072dfce91c8b3183b360ab9b0669ab1678292e4465a98a
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SSDEEP
384:s0JORJcf3Q3iPdxJODbzxqXIoyOVs91J4SYUcS+arWS:0JUJFxcX1q4t93bcGv
Malware Config
Extracted
C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\Restore-your-files.txt
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral1/memory/1996-54-0x0000000000240000-0x000000000024E000-memory.dmp family_chaos behavioral1/files/0x000b0000000122df-58.dat family_chaos behavioral1/files/0x000b0000000122df-59.dat family_chaos behavioral1/memory/904-60-0x0000000001070000-0x000000000107E000-memory.dmp family_chaos -
Deletes shadow copies 2 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 812 bcdedit.exe 1724 bcdedit.exe -
pid Process 1520 wbadmin.exe -
Disables Task Manager via registry modification
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Modifies extensions of user files 9 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File created C:\Users\Admin\Pictures\AddSync.raw.enc svchost.exe File opened for modification C:\Users\Admin\Pictures\LimitProtect.png.enc svchost.exe File opened for modification C:\Users\Admin\Pictures\ResolveJoin.raw.enc svchost.exe File created C:\Users\Admin\Pictures\UnprotectSuspend.tiff.enc svchost.exe File opened for modification C:\Users\Admin\Pictures\UnprotectSuspend.tiff.enc svchost.exe File opened for modification C:\Users\Admin\Pictures\AddSync.raw.enc svchost.exe File created C:\Users\Admin\Pictures\LimitProtect.png.enc svchost.exe File created C:\Users\Admin\Pictures\ResolveJoin.raw.enc svchost.exe File opened for modification C:\Users\Admin\Pictures\UnprotectSuspend.tiff svchost.exe -
Drops startup file 4 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\desktop.ini.enc svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini.enc svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Restore-your-files.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 904 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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft Store = "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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\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\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\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\Admin\AppData\Local\Microsoft\Feeds Cache\A6DSJQQJ\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\VCT3UJZ1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\3FENPIEN\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\Pictures\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\Public\Videos\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\Content.IE5\E9J3Z65S\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\History\History.IE5\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\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\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\4EJGXEBJ\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\All Users\Microsoft\Windows\Start Menu\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\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\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\Windows PowerShell\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\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\CNVACXT5\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\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\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\JPTKCP3O\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\Favorites\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\All Users\Microsoft\Windows\Ringtones\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\Accessories\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\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\BZB8KC7X\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\Downloads\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 564 vssadmin.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 904 svchost.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1996 333333.exe 904 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1996 333333.exe Token: SeDebugPrivilege 904 svchost.exe Token: SeBackupPrivilege 1480 vssvc.exe Token: SeRestorePrivilege 1480 vssvc.exe Token: SeAuditPrivilege 1480 vssvc.exe Token: SeIncreaseQuotaPrivilege 1236 WMIC.exe Token: SeSecurityPrivilege 1236 WMIC.exe Token: SeTakeOwnershipPrivilege 1236 WMIC.exe Token: SeLoadDriverPrivilege 1236 WMIC.exe Token: SeSystemProfilePrivilege 1236 WMIC.exe Token: SeSystemtimePrivilege 1236 WMIC.exe Token: SeProfSingleProcessPrivilege 1236 WMIC.exe Token: SeIncBasePriorityPrivilege 1236 WMIC.exe Token: SeCreatePagefilePrivilege 1236 WMIC.exe Token: SeBackupPrivilege 1236 WMIC.exe Token: SeRestorePrivilege 1236 WMIC.exe Token: SeShutdownPrivilege 1236 WMIC.exe Token: SeDebugPrivilege 1236 WMIC.exe Token: SeSystemEnvironmentPrivilege 1236 WMIC.exe Token: SeRemoteShutdownPrivilege 1236 WMIC.exe Token: SeUndockPrivilege 1236 WMIC.exe Token: SeManageVolumePrivilege 1236 WMIC.exe Token: 33 1236 WMIC.exe Token: 34 1236 WMIC.exe Token: 35 1236 WMIC.exe Token: SeIncreaseQuotaPrivilege 1236 WMIC.exe Token: SeSecurityPrivilege 1236 WMIC.exe Token: SeTakeOwnershipPrivilege 1236 WMIC.exe Token: SeLoadDriverPrivilege 1236 WMIC.exe Token: SeSystemProfilePrivilege 1236 WMIC.exe Token: SeSystemtimePrivilege 1236 WMIC.exe Token: SeProfSingleProcessPrivilege 1236 WMIC.exe Token: SeIncBasePriorityPrivilege 1236 WMIC.exe Token: SeCreatePagefilePrivilege 1236 WMIC.exe Token: SeBackupPrivilege 1236 WMIC.exe Token: SeRestorePrivilege 1236 WMIC.exe Token: SeShutdownPrivilege 1236 WMIC.exe Token: SeDebugPrivilege 1236 WMIC.exe Token: SeSystemEnvironmentPrivilege 1236 WMIC.exe Token: SeRemoteShutdownPrivilege 1236 WMIC.exe Token: SeUndockPrivilege 1236 WMIC.exe Token: SeManageVolumePrivilege 1236 WMIC.exe Token: 33 1236 WMIC.exe Token: 34 1236 WMIC.exe Token: 35 1236 WMIC.exe Token: SeBackupPrivilege 688 wbengine.exe Token: SeRestorePrivilege 688 wbengine.exe Token: SeSecurityPrivilege 688 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1996 wrote to memory of 904 1996 333333.exe 28 PID 1996 wrote to memory of 904 1996 333333.exe 28 PID 1996 wrote to memory of 904 1996 333333.exe 28 PID 904 wrote to memory of 560 904 svchost.exe 29 PID 904 wrote to memory of 560 904 svchost.exe 29 PID 904 wrote to memory of 560 904 svchost.exe 29 PID 560 wrote to memory of 564 560 cmd.exe 31 PID 560 wrote to memory of 564 560 cmd.exe 31 PID 560 wrote to memory of 564 560 cmd.exe 31 PID 560 wrote to memory of 1236 560 cmd.exe 34 PID 560 wrote to memory of 1236 560 cmd.exe 34 PID 560 wrote to memory of 1236 560 cmd.exe 34 PID 904 wrote to memory of 888 904 svchost.exe 36 PID 904 wrote to memory of 888 904 svchost.exe 36 PID 904 wrote to memory of 888 904 svchost.exe 36 PID 888 wrote to memory of 812 888 cmd.exe 38 PID 888 wrote to memory of 812 888 cmd.exe 38 PID 888 wrote to memory of 812 888 cmd.exe 38 PID 888 wrote to memory of 1724 888 cmd.exe 39 PID 888 wrote to memory of 1724 888 cmd.exe 39 PID 888 wrote to memory of 1724 888 cmd.exe 39 PID 904 wrote to memory of 1388 904 svchost.exe 40 PID 904 wrote to memory of 1388 904 svchost.exe 40 PID 904 wrote to memory of 1388 904 svchost.exe 40 PID 1388 wrote to memory of 1520 1388 cmd.exe 42 PID 1388 wrote to memory of 1520 1388 cmd.exe 42 PID 1388 wrote to memory of 1520 1388 cmd.exe 42 PID 904 wrote to memory of 1296 904 svchost.exe 48 PID 904 wrote to memory of 1296 904 svchost.exe 48 PID 904 wrote to memory of 1296 904 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\333333.exe"C:\Users\Admin\AppData\Local\Temp\333333.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Modifies extensions of user files
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Drops desktop.ini file(s)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:904 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:560 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:564
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1236
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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:888 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:812
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1724
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1388 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1520
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Restore-your-files.txt3⤵PID:1296
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1480
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:688
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1204
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:324
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
1KB
MD5014e33df55d01c434ac4a65ed3dc939b
SHA1b96fd45a81947b091e70d0bebd7f32959a6f3fbc
SHA256bb8f76eae64024ecc8cb1d09db2affc6c56f808d82e0060241f8cfda803f0668
SHA512e8a38fc09d31c3c6467e5b9ff0c9ef8f568a9dfdd6e7b8dd8aaaddd32a5e156a463ec74a4e9dcf17e8bcb3aa12778e2ed960aca963650699dbce124f4d3346bc
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Filesize
1KB
MD5014e33df55d01c434ac4a65ed3dc939b
SHA1b96fd45a81947b091e70d0bebd7f32959a6f3fbc
SHA256bb8f76eae64024ecc8cb1d09db2affc6c56f808d82e0060241f8cfda803f0668
SHA512e8a38fc09d31c3c6467e5b9ff0c9ef8f568a9dfdd6e7b8dd8aaaddd32a5e156a463ec74a4e9dcf17e8bcb3aa12778e2ed960aca963650699dbce124f4d3346bc
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Filesize
29KB
MD5df47134780d2ae126fec89f9f246d0e7
SHA125806ed7b5ba0284d1ac6858b0f49db39f834b16
SHA2563f8db4913ef08a02254be20bd04543b55be72cb97f5de3cfd1d773c140abed2a
SHA512388e220da35f134274bfbc68acb675eab70987fe422e9aa4d5cb581ac6db42a6695142f9d8e59edb12072dfce91c8b3183b360ab9b0669ab1678292e4465a98a
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Filesize
29KB
MD5df47134780d2ae126fec89f9f246d0e7
SHA125806ed7b5ba0284d1ac6858b0f49db39f834b16
SHA2563f8db4913ef08a02254be20bd04543b55be72cb97f5de3cfd1d773c140abed2a
SHA512388e220da35f134274bfbc68acb675eab70987fe422e9aa4d5cb581ac6db42a6695142f9d8e59edb12072dfce91c8b3183b360ab9b0669ab1678292e4465a98a