Analysis
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max time kernel
18s -
max time network
19s -
platform
windows7_x64 -
resource
win7-20241010-en -
resource tags
arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system -
submitted
30-01-2025 01:15
Behavioral task
behavioral1
Sample
chat.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
chat.exe
Resource
win10v2004-20250129-en
General
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Target
chat.exe
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Size
27KB
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MD5
bb45c811961c699e90d80cc770fd828b
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SHA1
bab510ce8e9413bfcb907964e7f29c6f0af740ac
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SHA256
e5c6c05c353d24bb71d61de48ec945c4284df2ac6aabd751405b7f9349973bab
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SHA512
2f5c64b96ad289d38b498d949c2d7d89006d4c19a61efd53fdda48342817febdd1b1ffdf6f53d99296101d88a3d669bc9d3fef5017eb4254c759148eb410cd6b
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SSDEEP
384:+tWZPzzxAm1vS5ZooqGhvLKe2cIS2NirglyOy5o91XOkHpg82vO:j7zxAmOS/Gee2VSSifho9pOkHq822
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/2076-1-0x0000000001220000-0x000000000122E000-memory.dmp family_chaos behavioral1/files/0x001c000000016cab-6.dat family_chaos behavioral1/memory/2472-8-0x0000000000E30000-0x0000000000E3E000-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 1612 bcdedit.exe 1260 bcdedit.exe -
pid Process 896 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 2472 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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\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\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\Maintenance\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\Windows\History\History.IE5\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\Windows PowerShell\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\Default\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\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\Feeds Cache\1U7Y9BT8\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\ADWO43R6\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\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\Links\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\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\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\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\4KNYJNXZ\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\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\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\BBWU148F\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\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\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\AppData\Local\Microsoft\Feeds Cache\5O2ZS8DL\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\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\Admin\AppData\Roaming\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\Public\Music\Sample Music\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\Windows\Start Menu\Programs\Accessories\System Tools\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\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\Links\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\Temporary Internet Files\Content.IE5\SEGJVAZC\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\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\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\4TDQSVWU\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\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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 2936 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1884 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2472 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2076 chat.exe 2076 chat.exe 2076 chat.exe 2472 svchost.exe 2472 svchost.exe 2472 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2076 chat.exe Token: SeDebugPrivilege 2472 svchost.exe Token: SeBackupPrivilege 2912 vssvc.exe Token: SeRestorePrivilege 2912 vssvc.exe Token: SeAuditPrivilege 2912 vssvc.exe Token: SeIncreaseQuotaPrivilege 1420 WMIC.exe Token: SeSecurityPrivilege 1420 WMIC.exe Token: SeTakeOwnershipPrivilege 1420 WMIC.exe Token: SeLoadDriverPrivilege 1420 WMIC.exe Token: SeSystemProfilePrivilege 1420 WMIC.exe Token: SeSystemtimePrivilege 1420 WMIC.exe Token: SeProfSingleProcessPrivilege 1420 WMIC.exe Token: SeIncBasePriorityPrivilege 1420 WMIC.exe Token: SeCreatePagefilePrivilege 1420 WMIC.exe Token: SeBackupPrivilege 1420 WMIC.exe Token: SeRestorePrivilege 1420 WMIC.exe Token: SeShutdownPrivilege 1420 WMIC.exe Token: SeDebugPrivilege 1420 WMIC.exe Token: SeSystemEnvironmentPrivilege 1420 WMIC.exe Token: SeRemoteShutdownPrivilege 1420 WMIC.exe Token: SeUndockPrivilege 1420 WMIC.exe Token: SeManageVolumePrivilege 1420 WMIC.exe Token: 33 1420 WMIC.exe Token: 34 1420 WMIC.exe Token: 35 1420 WMIC.exe Token: SeIncreaseQuotaPrivilege 1420 WMIC.exe Token: SeSecurityPrivilege 1420 WMIC.exe Token: SeTakeOwnershipPrivilege 1420 WMIC.exe Token: SeLoadDriverPrivilege 1420 WMIC.exe Token: SeSystemProfilePrivilege 1420 WMIC.exe Token: SeSystemtimePrivilege 1420 WMIC.exe Token: SeProfSingleProcessPrivilege 1420 WMIC.exe Token: SeIncBasePriorityPrivilege 1420 WMIC.exe Token: SeCreatePagefilePrivilege 1420 WMIC.exe Token: SeBackupPrivilege 1420 WMIC.exe Token: SeRestorePrivilege 1420 WMIC.exe Token: SeShutdownPrivilege 1420 WMIC.exe Token: SeDebugPrivilege 1420 WMIC.exe Token: SeSystemEnvironmentPrivilege 1420 WMIC.exe Token: SeRemoteShutdownPrivilege 1420 WMIC.exe Token: SeUndockPrivilege 1420 WMIC.exe Token: SeManageVolumePrivilege 1420 WMIC.exe Token: 33 1420 WMIC.exe Token: 34 1420 WMIC.exe Token: 35 1420 WMIC.exe Token: SeBackupPrivilege 2684 wbengine.exe Token: SeRestorePrivilege 2684 wbengine.exe Token: SeSecurityPrivilege 2684 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2076 wrote to memory of 2472 2076 chat.exe 30 PID 2076 wrote to memory of 2472 2076 chat.exe 30 PID 2076 wrote to memory of 2472 2076 chat.exe 30 PID 2472 wrote to memory of 3012 2472 svchost.exe 31 PID 2472 wrote to memory of 3012 2472 svchost.exe 31 PID 2472 wrote to memory of 3012 2472 svchost.exe 31 PID 3012 wrote to memory of 2936 3012 cmd.exe 33 PID 3012 wrote to memory of 2936 3012 cmd.exe 33 PID 3012 wrote to memory of 2936 3012 cmd.exe 33 PID 3012 wrote to memory of 1420 3012 cmd.exe 36 PID 3012 wrote to memory of 1420 3012 cmd.exe 36 PID 3012 wrote to memory of 1420 3012 cmd.exe 36 PID 2472 wrote to memory of 2152 2472 svchost.exe 38 PID 2472 wrote to memory of 2152 2472 svchost.exe 38 PID 2472 wrote to memory of 2152 2472 svchost.exe 38 PID 2152 wrote to memory of 1612 2152 cmd.exe 40 PID 2152 wrote to memory of 1612 2152 cmd.exe 40 PID 2152 wrote to memory of 1612 2152 cmd.exe 40 PID 2152 wrote to memory of 1260 2152 cmd.exe 41 PID 2152 wrote to memory of 1260 2152 cmd.exe 41 PID 2152 wrote to memory of 1260 2152 cmd.exe 41 PID 2472 wrote to memory of 1680 2472 svchost.exe 42 PID 2472 wrote to memory of 1680 2472 svchost.exe 42 PID 2472 wrote to memory of 1680 2472 svchost.exe 42 PID 1680 wrote to memory of 896 1680 cmd.exe 44 PID 1680 wrote to memory of 896 1680 cmd.exe 44 PID 1680 wrote to memory of 896 1680 cmd.exe 44 PID 2472 wrote to memory of 1884 2472 svchost.exe 49 PID 2472 wrote to memory of 1884 2472 svchost.exe 49 PID 2472 wrote to memory of 1884 2472 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\chat.exe"C:\Users\Admin\AppData\Local\Temp\chat.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2076 -
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)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2472 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:3012 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2936
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1420
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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:2152 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1612
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1260
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1680 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:896
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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:1884
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2912
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2684
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3048
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2104
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Direct Volume Access
1Indicator Removal
3File Deletion
3Modify Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
582B
MD5ed5cc52876db869de48a4783069c2a5e
SHA1a9d51ceaeff715ace430f9462ab2ee4e7f33e70e
SHA25645726f2f29967ef016f8d556fb6468a577307d67388cc4530295a9ca10fdfa36
SHA5121745aefb9b4db4cdd7c08ee3a7d133db08f35a336fd18b598211519b481ef25ac84a3e8a3da3db06caef9f531288d1cf0ca8d4b2560637945e7953e8b45421f5
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Filesize
27KB
MD5bb45c811961c699e90d80cc770fd828b
SHA1bab510ce8e9413bfcb907964e7f29c6f0af740ac
SHA256e5c6c05c353d24bb71d61de48ec945c4284df2ac6aabd751405b7f9349973bab
SHA5122f5c64b96ad289d38b498d949c2d7d89006d4c19a61efd53fdda48342817febdd1b1ffdf6f53d99296101d88a3d669bc9d3fef5017eb4254c759148eb410cd6b
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0