Analysis
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max time kernel
122s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
31-01-2025 19:30
Behavioral task
behavioral1
Sample
boy.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
boy.exe
Resource
win10v2004-20250129-en
General
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Target
boy.exe
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Size
27KB
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MD5
a19b3e37b27c83fd3662dcd00b836edf
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SHA1
17fef5759015c1cd073f1d62cd97642e8cbaccee
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SHA256
9f64413abd5c442456a4424192df1fec6bd172814dc753d3eeaf266df030a00f
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SHA512
c0eba8ae80f2301154772939d83f18c602daf016b4fd1f72674bca4f139207fbaf6fee8fbf5dfc2a310771ddbc7f5016009b04b3adb03d74af75f3aad3530668
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SSDEEP
384:6PtWZPzzxAm1vL3j/ZREWx0noBeuBbzOlJOy5o91iPA82v4:6m7zxAmB9R70nWeu1iho9QI82Q
Malware Config
Extracted
C:\ProgramData\Adobe\Updater6\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/1660-1-0x0000000000D30000-0x0000000000D3E000-memory.dmp family_chaos behavioral1/files/0x000e000000013b4c-6.dat family_chaos behavioral1/memory/1976-8-0x0000000000CC0000-0x0000000000CCE000-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 712 bcdedit.exe 2284 bcdedit.exe -
pid Process 2044 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 1976 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-1-5-21-3290804112-2823094203-3137964600-1000\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\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\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\Administrative Tools\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\History\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\All Users\Microsoft\Windows\Start Menu\Programs\Startup\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 F:\$RECYCLE.BIN\S-1-5-21-3290804112-2823094203-3137964600-1000\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\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\8NROS34R\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\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\Public\Videos\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\AppData\Local\Microsoft\Feeds Cache\QJELLEL3\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\Links for United States\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\HE9LBEC2\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\Games\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\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Temporary Internet Files\Content.IE5\Y3Z0XF05\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\History\History.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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\HWUYADN5\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\WY6T2DFU\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\Admin\AppData\Roaming\Microsoft\Windows\Libraries\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\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\RM4QEUM4\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\Downloads\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\Videos\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\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\Windows\Temporary Internet Files\Content.IE5\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\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 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2900 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1772 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 1660 boy.exe 1976 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1660 boy.exe 1660 boy.exe 1660 boy.exe 1976 svchost.exe 1976 svchost.exe 1976 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1660 boy.exe Token: SeDebugPrivilege 1976 svchost.exe Token: SeBackupPrivilege 3056 vssvc.exe Token: SeRestorePrivilege 3056 vssvc.exe Token: SeAuditPrivilege 3056 vssvc.exe Token: SeIncreaseQuotaPrivilege 2992 WMIC.exe Token: SeSecurityPrivilege 2992 WMIC.exe Token: SeTakeOwnershipPrivilege 2992 WMIC.exe Token: SeLoadDriverPrivilege 2992 WMIC.exe Token: SeSystemProfilePrivilege 2992 WMIC.exe Token: SeSystemtimePrivilege 2992 WMIC.exe Token: SeProfSingleProcessPrivilege 2992 WMIC.exe Token: SeIncBasePriorityPrivilege 2992 WMIC.exe Token: SeCreatePagefilePrivilege 2992 WMIC.exe Token: SeBackupPrivilege 2992 WMIC.exe Token: SeRestorePrivilege 2992 WMIC.exe Token: SeShutdownPrivilege 2992 WMIC.exe Token: SeDebugPrivilege 2992 WMIC.exe Token: SeSystemEnvironmentPrivilege 2992 WMIC.exe Token: SeRemoteShutdownPrivilege 2992 WMIC.exe Token: SeUndockPrivilege 2992 WMIC.exe Token: SeManageVolumePrivilege 2992 WMIC.exe Token: 33 2992 WMIC.exe Token: 34 2992 WMIC.exe Token: 35 2992 WMIC.exe Token: SeIncreaseQuotaPrivilege 2992 WMIC.exe Token: SeSecurityPrivilege 2992 WMIC.exe Token: SeTakeOwnershipPrivilege 2992 WMIC.exe Token: SeLoadDriverPrivilege 2992 WMIC.exe Token: SeSystemProfilePrivilege 2992 WMIC.exe Token: SeSystemtimePrivilege 2992 WMIC.exe Token: SeProfSingleProcessPrivilege 2992 WMIC.exe Token: SeIncBasePriorityPrivilege 2992 WMIC.exe Token: SeCreatePagefilePrivilege 2992 WMIC.exe Token: SeBackupPrivilege 2992 WMIC.exe Token: SeRestorePrivilege 2992 WMIC.exe Token: SeShutdownPrivilege 2992 WMIC.exe Token: SeDebugPrivilege 2992 WMIC.exe Token: SeSystemEnvironmentPrivilege 2992 WMIC.exe Token: SeRemoteShutdownPrivilege 2992 WMIC.exe Token: SeUndockPrivilege 2992 WMIC.exe Token: SeManageVolumePrivilege 2992 WMIC.exe Token: 33 2992 WMIC.exe Token: 34 2992 WMIC.exe Token: 35 2992 WMIC.exe Token: SeBackupPrivilege 1508 wbengine.exe Token: SeRestorePrivilege 1508 wbengine.exe Token: SeSecurityPrivilege 1508 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1660 wrote to memory of 1976 1660 boy.exe 31 PID 1660 wrote to memory of 1976 1660 boy.exe 31 PID 1660 wrote to memory of 1976 1660 boy.exe 31 PID 1976 wrote to memory of 2788 1976 svchost.exe 32 PID 1976 wrote to memory of 2788 1976 svchost.exe 32 PID 1976 wrote to memory of 2788 1976 svchost.exe 32 PID 2788 wrote to memory of 2900 2788 cmd.exe 34 PID 2788 wrote to memory of 2900 2788 cmd.exe 34 PID 2788 wrote to memory of 2900 2788 cmd.exe 34 PID 2788 wrote to memory of 2992 2788 cmd.exe 37 PID 2788 wrote to memory of 2992 2788 cmd.exe 37 PID 2788 wrote to memory of 2992 2788 cmd.exe 37 PID 1976 wrote to memory of 1680 1976 svchost.exe 39 PID 1976 wrote to memory of 1680 1976 svchost.exe 39 PID 1976 wrote to memory of 1680 1976 svchost.exe 39 PID 1680 wrote to memory of 712 1680 cmd.exe 41 PID 1680 wrote to memory of 712 1680 cmd.exe 41 PID 1680 wrote to memory of 712 1680 cmd.exe 41 PID 1680 wrote to memory of 2284 1680 cmd.exe 42 PID 1680 wrote to memory of 2284 1680 cmd.exe 42 PID 1680 wrote to memory of 2284 1680 cmd.exe 42 PID 1976 wrote to memory of 1544 1976 svchost.exe 43 PID 1976 wrote to memory of 1544 1976 svchost.exe 43 PID 1976 wrote to memory of 1544 1976 svchost.exe 43 PID 1544 wrote to memory of 2044 1544 cmd.exe 45 PID 1544 wrote to memory of 2044 1544 cmd.exe 45 PID 1544 wrote to memory of 2044 1544 cmd.exe 45 PID 1976 wrote to memory of 1772 1976 svchost.exe 50 PID 1976 wrote to memory of 1772 1976 svchost.exe 50 PID 1976 wrote to memory of 1772 1976 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\boy.exe"C:\Users\Admin\AppData\Local\Temp\boy.exe"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1660 -
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:1976 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2788 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2900
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2992
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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:1680 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:712
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2284
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1544 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2044
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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:1772
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3056
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1508
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1948
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1516
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
MD5a19b3e37b27c83fd3662dcd00b836edf
SHA117fef5759015c1cd073f1d62cd97642e8cbaccee
SHA2569f64413abd5c442456a4424192df1fec6bd172814dc753d3eeaf266df030a00f
SHA512c0eba8ae80f2301154772939d83f18c602daf016b4fd1f72674bca4f139207fbaf6fee8fbf5dfc2a310771ddbc7f5016009b04b3adb03d74af75f3aad3530668
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0