Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
23-10-2024 07:25
Behavioral task
behavioral1
Sample
aaaa/enc.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
aaaa/info.docx
Resource
win7-20241010-en
Behavioral task
behavioral3
Sample
aaaa/wiper.exe
Resource
win7-20240708-en
General
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Target
aaaa/enc.exe
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Size
779KB
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MD5
646a228c774409c285c256a8faa49bde
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SHA1
e8fd96815fa181b40e3b1597b817c9905df9da59
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SHA256
35f7fa926804c2a9a49b25d6709de2d018bc32333df2e51471a69c55cbf072a0
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SHA512
7f73a607602e06d8f3126a5fad88c0c7cc8ff58fed28e7840ca47ecf50f575c8d8b751441b4c7ac7aa48e65226c1219c7afa543db9f553bef1173330a3f64c13
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SSDEEP
12288:bCyAGey4UN8Pn55NRi9Q2i8xLmLCNWyReZsk0Clrbk68zn2fVCBLhjuxWhn8+klX:juy0cXzVRnjfioO5mX/
Malware Config
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/2956-1-0x00000000013B0000-0x000000000147A000-memory.dmp family_chaos behavioral1/files/0x000e0000000162b2-6.dat family_chaos behavioral1/memory/2752-8-0x0000000000150000-0x000000000021A000-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 1660 bcdedit.exe 1400 bcdedit.exe -
pid Process 1296 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 twelve.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Twelve.txt twelve.exe -
Executes dropped EXE 1 IoCs
pid Process 2752 twelve.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\twelve.exe" twelve.exe -
Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\8YJ7JBZ2\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\D3UCK9EB\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\Links\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini twelve.exe File opened for modification C:\Users\Public\Desktop\desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Ringtones\desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini twelve.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini twelve.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini twelve.exe File opened for modification C:\Users\Public\Videos\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini twelve.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini twelve.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Searches\desktop.ini twelve.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\HUSZWRNT\desktop.ini twelve.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini twelve.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini twelve.exe File opened for modification C:\Users\Public\desktop.ini twelve.exe File opened for modification C:\Users\Public\Music\desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini twelve.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2872745919-2748461613-2989606286-1000\desktop.ini twelve.exe File opened for modification C:\Users\Public\Libraries\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\TUVLNS83\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\2DZXJZH2\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini twelve.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini twelve.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\OIPA882W\desktop.ini twelve.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\F17E26FP\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini twelve.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini twelve.exe File opened for modification C:\Users\Public\Documents\desktop.ini twelve.exe File opened for modification C:\Users\Public\Pictures\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Videos\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\M1ITRGY5\desktop.ini twelve.exe File opened for modification C:\Users\Public\Downloads\desktop.ini twelve.exe File opened for modification C:\Users\Admin\Documents\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini twelve.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini twelve.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tgpgho739.jpg" twelve.exe Set value (str) \REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" twelve.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 2844 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1424 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2752 twelve.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2956 enc.exe 2956 enc.exe 2956 enc.exe 2752 twelve.exe 2752 twelve.exe 2752 twelve.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2956 enc.exe Token: SeDebugPrivilege 2752 twelve.exe Token: SeBackupPrivilege 2720 vssvc.exe Token: SeRestorePrivilege 2720 vssvc.exe Token: SeAuditPrivilege 2720 vssvc.exe Token: SeIncreaseQuotaPrivilege 2856 WMIC.exe Token: SeSecurityPrivilege 2856 WMIC.exe Token: SeTakeOwnershipPrivilege 2856 WMIC.exe Token: SeLoadDriverPrivilege 2856 WMIC.exe Token: SeSystemProfilePrivilege 2856 WMIC.exe Token: SeSystemtimePrivilege 2856 WMIC.exe Token: SeProfSingleProcessPrivilege 2856 WMIC.exe Token: SeIncBasePriorityPrivilege 2856 WMIC.exe Token: SeCreatePagefilePrivilege 2856 WMIC.exe Token: SeBackupPrivilege 2856 WMIC.exe Token: SeRestorePrivilege 2856 WMIC.exe Token: SeShutdownPrivilege 2856 WMIC.exe Token: SeDebugPrivilege 2856 WMIC.exe Token: SeSystemEnvironmentPrivilege 2856 WMIC.exe Token: SeRemoteShutdownPrivilege 2856 WMIC.exe Token: SeUndockPrivilege 2856 WMIC.exe Token: SeManageVolumePrivilege 2856 WMIC.exe Token: 33 2856 WMIC.exe Token: 34 2856 WMIC.exe Token: 35 2856 WMIC.exe Token: SeIncreaseQuotaPrivilege 2856 WMIC.exe Token: SeSecurityPrivilege 2856 WMIC.exe Token: SeTakeOwnershipPrivilege 2856 WMIC.exe Token: SeLoadDriverPrivilege 2856 WMIC.exe Token: SeSystemProfilePrivilege 2856 WMIC.exe Token: SeSystemtimePrivilege 2856 WMIC.exe Token: SeProfSingleProcessPrivilege 2856 WMIC.exe Token: SeIncBasePriorityPrivilege 2856 WMIC.exe Token: SeCreatePagefilePrivilege 2856 WMIC.exe Token: SeBackupPrivilege 2856 WMIC.exe Token: SeRestorePrivilege 2856 WMIC.exe Token: SeShutdownPrivilege 2856 WMIC.exe Token: SeDebugPrivilege 2856 WMIC.exe Token: SeSystemEnvironmentPrivilege 2856 WMIC.exe Token: SeRemoteShutdownPrivilege 2856 WMIC.exe Token: SeUndockPrivilege 2856 WMIC.exe Token: SeManageVolumePrivilege 2856 WMIC.exe Token: 33 2856 WMIC.exe Token: 34 2856 WMIC.exe Token: 35 2856 WMIC.exe Token: SeBackupPrivilege 1932 wbengine.exe Token: SeRestorePrivilege 1932 wbengine.exe Token: SeSecurityPrivilege 1932 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2956 wrote to memory of 2752 2956 enc.exe 31 PID 2956 wrote to memory of 2752 2956 enc.exe 31 PID 2956 wrote to memory of 2752 2956 enc.exe 31 PID 2752 wrote to memory of 2576 2752 twelve.exe 32 PID 2752 wrote to memory of 2576 2752 twelve.exe 32 PID 2752 wrote to memory of 2576 2752 twelve.exe 32 PID 2576 wrote to memory of 2844 2576 cmd.exe 34 PID 2576 wrote to memory of 2844 2576 cmd.exe 34 PID 2576 wrote to memory of 2844 2576 cmd.exe 34 PID 2576 wrote to memory of 2856 2576 cmd.exe 37 PID 2576 wrote to memory of 2856 2576 cmd.exe 37 PID 2576 wrote to memory of 2856 2576 cmd.exe 37 PID 2752 wrote to memory of 2136 2752 twelve.exe 39 PID 2752 wrote to memory of 2136 2752 twelve.exe 39 PID 2752 wrote to memory of 2136 2752 twelve.exe 39 PID 2136 wrote to memory of 1660 2136 cmd.exe 41 PID 2136 wrote to memory of 1660 2136 cmd.exe 41 PID 2136 wrote to memory of 1660 2136 cmd.exe 41 PID 2136 wrote to memory of 1400 2136 cmd.exe 42 PID 2136 wrote to memory of 1400 2136 cmd.exe 42 PID 2136 wrote to memory of 1400 2136 cmd.exe 42 PID 2752 wrote to memory of 700 2752 twelve.exe 43 PID 2752 wrote to memory of 700 2752 twelve.exe 43 PID 2752 wrote to memory of 700 2752 twelve.exe 43 PID 700 wrote to memory of 1296 700 cmd.exe 45 PID 700 wrote to memory of 1296 700 cmd.exe 45 PID 700 wrote to memory of 1296 700 cmd.exe 45 PID 2752 wrote to memory of 1424 2752 twelve.exe 50 PID 2752 wrote to memory of 1424 2752 twelve.exe 50 PID 2752 wrote to memory of 1424 2752 twelve.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\aaaa\enc.exe"C:\Users\Admin\AppData\Local\Temp\aaaa\enc.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956 -
C:\Users\Admin\AppData\Roaming\twelve.exe"C:\Users\Admin\AppData\Roaming\twelve.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:2752 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2576 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2844
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2856
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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:2136 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1660
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1400
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:700 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1296
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Twelve.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1424
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2720
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1932
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2460
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1264
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
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
38B
MD57afeb3bf9a9a994a6444958adf75bfff
SHA14fdf7442d158a752a174054ec8fa73c149968f17
SHA256d69ff81bffe7a3f4d8e5374ffea18a5b22856dd85459ddfcd047b82943201f11
SHA5121c3edca1046a167dcb33797375cfeab2b66985630e85e6cb14862c70aae3a0d8c067c94d1de772d46226ea391b8ca5b434951eba5cb50f6c92afddc5c051bdb0
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Filesize
779KB
MD5646a228c774409c285c256a8faa49bde
SHA1e8fd96815fa181b40e3b1597b817c9905df9da59
SHA25635f7fa926804c2a9a49b25d6709de2d018bc32333df2e51471a69c55cbf072a0
SHA5127f73a607602e06d8f3126a5fad88c0c7cc8ff58fed28e7840ca47ecf50f575c8d8b751441b4c7ac7aa48e65226c1219c7afa543db9f553bef1173330a3f64c13
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0