Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system -
submitted
29-08-2024 08:01
Behavioral task
behavioral1
Sample
6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe
Resource
win10v2004-20240802-en
General
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Target
6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe
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Size
96KB
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MD5
b2692504c14981764eba95b5cda1aac8
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SHA1
f35d3653f2c166caea51977042877cb6e1544b85
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SHA256
6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a
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SHA512
66c73af4e0db0463c46bb7443c56eeac1dded76f19d7512be287c944944e753c2db8d4ebe523493f39a70965c27c5c51ec1d44eb286ed70319e775b35cdd2b33
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SSDEEP
1536:dNpn7Ddnq9VXNlEOr/9bq9q7ExehRN2Qk4BHqhiGgiFMzLPwiSfiKxNXCGEP9jFY:Rndnq9VdMtj
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\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/816-1-0x0000000001340000-0x000000000135E000-memory.dmp family_chaos behavioral1/files/0x0008000000018718-6.dat family_chaos behavioral1/memory/1240-8-0x0000000000970000-0x000000000098E000-memory.dmp family_chaos -
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 2828 bcdedit.exe 1056 bcdedit.exe -
pid Process 532 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 1240 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-1-5-21-940600906-3464502421-4240639183-1000\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\Admin\AppData\Local\Microsoft\Windows\History\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\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-940600906-3464502421-4240639183-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\CDYA2V22\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I17U52WV\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\5KCSK57A\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\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\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\Pictures\Sample Pictures\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\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Accessories\Accessibility\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\Burn\Burn\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\Windows\Recent\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\Saved 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\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\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\Windows\Temporary Internet Files\Content.IE5\542OWCDO\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\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\XR0R6AOK\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\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 for United States\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Desktop\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\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\BIXBDSBU\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I2MIHKBD\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\Documents\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\rbxjyxhjf.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 2788 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 856 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1240 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe 1240 svchost.exe 1240 svchost.exe 1240 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe Token: SeDebugPrivilege 1240 svchost.exe Token: SeBackupPrivilege 2700 vssvc.exe Token: SeRestorePrivilege 2700 vssvc.exe Token: SeAuditPrivilege 2700 vssvc.exe Token: SeIncreaseQuotaPrivilege 1328 WMIC.exe Token: SeSecurityPrivilege 1328 WMIC.exe Token: SeTakeOwnershipPrivilege 1328 WMIC.exe Token: SeLoadDriverPrivilege 1328 WMIC.exe Token: SeSystemProfilePrivilege 1328 WMIC.exe Token: SeSystemtimePrivilege 1328 WMIC.exe Token: SeProfSingleProcessPrivilege 1328 WMIC.exe Token: SeIncBasePriorityPrivilege 1328 WMIC.exe Token: SeCreatePagefilePrivilege 1328 WMIC.exe Token: SeBackupPrivilege 1328 WMIC.exe Token: SeRestorePrivilege 1328 WMIC.exe Token: SeShutdownPrivilege 1328 WMIC.exe Token: SeDebugPrivilege 1328 WMIC.exe Token: SeSystemEnvironmentPrivilege 1328 WMIC.exe Token: SeRemoteShutdownPrivilege 1328 WMIC.exe Token: SeUndockPrivilege 1328 WMIC.exe Token: SeManageVolumePrivilege 1328 WMIC.exe Token: 33 1328 WMIC.exe Token: 34 1328 WMIC.exe Token: 35 1328 WMIC.exe Token: SeIncreaseQuotaPrivilege 1328 WMIC.exe Token: SeSecurityPrivilege 1328 WMIC.exe Token: SeTakeOwnershipPrivilege 1328 WMIC.exe Token: SeLoadDriverPrivilege 1328 WMIC.exe Token: SeSystemProfilePrivilege 1328 WMIC.exe Token: SeSystemtimePrivilege 1328 WMIC.exe Token: SeProfSingleProcessPrivilege 1328 WMIC.exe Token: SeIncBasePriorityPrivilege 1328 WMIC.exe Token: SeCreatePagefilePrivilege 1328 WMIC.exe Token: SeBackupPrivilege 1328 WMIC.exe Token: SeRestorePrivilege 1328 WMIC.exe Token: SeShutdownPrivilege 1328 WMIC.exe Token: SeDebugPrivilege 1328 WMIC.exe Token: SeSystemEnvironmentPrivilege 1328 WMIC.exe Token: SeRemoteShutdownPrivilege 1328 WMIC.exe Token: SeUndockPrivilege 1328 WMIC.exe Token: SeManageVolumePrivilege 1328 WMIC.exe Token: 33 1328 WMIC.exe Token: 34 1328 WMIC.exe Token: 35 1328 WMIC.exe Token: SeBackupPrivilege 392 wbengine.exe Token: SeRestorePrivilege 392 wbengine.exe Token: SeSecurityPrivilege 392 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 816 wrote to memory of 1240 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe 31 PID 816 wrote to memory of 1240 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe 31 PID 816 wrote to memory of 1240 816 6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe 31 PID 1240 wrote to memory of 2748 1240 svchost.exe 32 PID 1240 wrote to memory of 2748 1240 svchost.exe 32 PID 1240 wrote to memory of 2748 1240 svchost.exe 32 PID 2748 wrote to memory of 2788 2748 cmd.exe 34 PID 2748 wrote to memory of 2788 2748 cmd.exe 34 PID 2748 wrote to memory of 2788 2748 cmd.exe 34 PID 2748 wrote to memory of 1328 2748 cmd.exe 37 PID 2748 wrote to memory of 1328 2748 cmd.exe 37 PID 2748 wrote to memory of 1328 2748 cmd.exe 37 PID 1240 wrote to memory of 1812 1240 svchost.exe 39 PID 1240 wrote to memory of 1812 1240 svchost.exe 39 PID 1240 wrote to memory of 1812 1240 svchost.exe 39 PID 1812 wrote to memory of 2828 1812 cmd.exe 41 PID 1812 wrote to memory of 2828 1812 cmd.exe 41 PID 1812 wrote to memory of 2828 1812 cmd.exe 41 PID 1812 wrote to memory of 1056 1812 cmd.exe 42 PID 1812 wrote to memory of 1056 1812 cmd.exe 42 PID 1812 wrote to memory of 1056 1812 cmd.exe 42 PID 1240 wrote to memory of 1820 1240 svchost.exe 43 PID 1240 wrote to memory of 1820 1240 svchost.exe 43 PID 1240 wrote to memory of 1820 1240 svchost.exe 43 PID 1820 wrote to memory of 532 1820 cmd.exe 45 PID 1820 wrote to memory of 532 1820 cmd.exe 45 PID 1820 wrote to memory of 532 1820 cmd.exe 45 PID 1240 wrote to memory of 856 1240 svchost.exe 50 PID 1240 wrote to memory of 856 1240 svchost.exe 50 PID 1240 wrote to memory of 856 1240 svchost.exe 50 -
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\6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe"C:\Users\Admin\AppData\Local\Temp\6e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:816 -
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:1240 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2748 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2788
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1328
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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:1812 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2828
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1056
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1820 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:532
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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:856
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2700
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:392
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1584
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2836
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
582B
MD5ed5cc52876db869de48a4783069c2a5e
SHA1a9d51ceaeff715ace430f9462ab2ee4e7f33e70e
SHA25645726f2f29967ef016f8d556fb6468a577307d67388cc4530295a9ca10fdfa36
SHA5121745aefb9b4db4cdd7c08ee3a7d133db08f35a336fd18b598211519b481ef25ac84a3e8a3da3db06caef9f531288d1cf0ca8d4b2560637945e7953e8b45421f5
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Filesize
96KB
MD5b2692504c14981764eba95b5cda1aac8
SHA1f35d3653f2c166caea51977042877cb6e1544b85
SHA2566e951ec3eefa660258a0e12350e3e477348467f15feb77b71b5a89c73532ce8a
SHA51266c73af4e0db0463c46bb7443c56eeac1dded76f19d7512be287c944944e753c2db8d4ebe523493f39a70965c27c5c51ec1d44eb286ed70319e775b35cdd2b33
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0