Resubmissions
04-12-2024 22:48
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241204-2nbtta1kfr 1004-12-2024 19:35
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241204-x3b1xaxjf1 10Analysis
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max time kernel
20s -
max time network
17s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
04-12-2024 19:35
Behavioral task
behavioral1
Sample
wertg.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
wertg.exe
Resource
win10v2004-20241007-en
General
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Target
wertg.exe
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Size
652KB
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MD5
59db985c17a4ab06d3a0fbbb39ac045e
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SHA1
2622da604c4be6f2b8ad06cb2fa55d412ba53ece
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SHA256
9a065bd64cf7f9f4d1385bfd9df86325e03f8dd64d0a3af56cfd05a7b28c3247
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SHA512
8a0a2bb31c37ea27aeaa5f9b1e5f5ce3a42cecca8bdddb00b622bb722c4d7a2e36442b7c628d17629974676278aa0703e1088984599cf216eb2ff6e6a2f995a4
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SSDEEP
12288:n4/yrAlyQGlqrLFB8vT+RNinZ12sVNRgznu+Jbb0LrYsFPV0ZSYWaBfF+Nd5zKF:nMM4qskaNxm
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/2616-1-0x0000000000D00000-0x0000000000DAA000-memory.dmp family_chaos behavioral1/files/0x0004000000004ed7-7.dat family_chaos behavioral1/memory/2028-9-0x0000000000070000-0x000000000011A000-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 896 bcdedit.exe 2600 bcdedit.exe -
pid Process 1680 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 2028 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-1-5-21-1488793075-819845221-1497111674-1000\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\Public\Music\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\DFSC7KT7\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\Accessories\Tablet PC\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\Local\Microsoft\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\I618Z2Y3\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\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ORIYJR4N\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\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\Maintenance\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\Windows\Start Menu\Programs\Accessories\Accessibility\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\Downloads\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\C1JHBK4W\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1488793075-819845221-1497111674-1000\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\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\Public\Downloads\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\CW1M20CU\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\Startup\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\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\691RDNCS\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\Links\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\Desktop\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\Sample Media\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\PG1T8SOQ\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\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\N5RJMVSE\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Pictures\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\6el66lstu.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 2656 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1340 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2616 wertg.exe 2028 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2616 wertg.exe 2616 wertg.exe 2616 wertg.exe 2028 svchost.exe 2028 svchost.exe 2028 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2616 wertg.exe Token: SeDebugPrivilege 2028 svchost.exe Token: SeBackupPrivilege 2912 vssvc.exe Token: SeRestorePrivilege 2912 vssvc.exe Token: SeAuditPrivilege 2912 vssvc.exe Token: SeIncreaseQuotaPrivilege 2700 WMIC.exe Token: SeSecurityPrivilege 2700 WMIC.exe Token: SeTakeOwnershipPrivilege 2700 WMIC.exe Token: SeLoadDriverPrivilege 2700 WMIC.exe Token: SeSystemProfilePrivilege 2700 WMIC.exe Token: SeSystemtimePrivilege 2700 WMIC.exe Token: SeProfSingleProcessPrivilege 2700 WMIC.exe Token: SeIncBasePriorityPrivilege 2700 WMIC.exe Token: SeCreatePagefilePrivilege 2700 WMIC.exe Token: SeBackupPrivilege 2700 WMIC.exe Token: SeRestorePrivilege 2700 WMIC.exe Token: SeShutdownPrivilege 2700 WMIC.exe Token: SeDebugPrivilege 2700 WMIC.exe Token: SeSystemEnvironmentPrivilege 2700 WMIC.exe Token: SeRemoteShutdownPrivilege 2700 WMIC.exe Token: SeUndockPrivilege 2700 WMIC.exe Token: SeManageVolumePrivilege 2700 WMIC.exe Token: 33 2700 WMIC.exe Token: 34 2700 WMIC.exe Token: 35 2700 WMIC.exe Token: SeIncreaseQuotaPrivilege 2700 WMIC.exe Token: SeSecurityPrivilege 2700 WMIC.exe Token: SeTakeOwnershipPrivilege 2700 WMIC.exe Token: SeLoadDriverPrivilege 2700 WMIC.exe Token: SeSystemProfilePrivilege 2700 WMIC.exe Token: SeSystemtimePrivilege 2700 WMIC.exe Token: SeProfSingleProcessPrivilege 2700 WMIC.exe Token: SeIncBasePriorityPrivilege 2700 WMIC.exe Token: SeCreatePagefilePrivilege 2700 WMIC.exe Token: SeBackupPrivilege 2700 WMIC.exe Token: SeRestorePrivilege 2700 WMIC.exe Token: SeShutdownPrivilege 2700 WMIC.exe Token: SeDebugPrivilege 2700 WMIC.exe Token: SeSystemEnvironmentPrivilege 2700 WMIC.exe Token: SeRemoteShutdownPrivilege 2700 WMIC.exe Token: SeUndockPrivilege 2700 WMIC.exe Token: SeManageVolumePrivilege 2700 WMIC.exe Token: 33 2700 WMIC.exe Token: 34 2700 WMIC.exe Token: 35 2700 WMIC.exe Token: SeBackupPrivilege 1660 wbengine.exe Token: SeRestorePrivilege 1660 wbengine.exe Token: SeSecurityPrivilege 1660 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2616 wrote to memory of 2028 2616 wertg.exe 31 PID 2616 wrote to memory of 2028 2616 wertg.exe 31 PID 2616 wrote to memory of 2028 2616 wertg.exe 31 PID 2028 wrote to memory of 2760 2028 svchost.exe 32 PID 2028 wrote to memory of 2760 2028 svchost.exe 32 PID 2028 wrote to memory of 2760 2028 svchost.exe 32 PID 2760 wrote to memory of 2656 2760 cmd.exe 34 PID 2760 wrote to memory of 2656 2760 cmd.exe 34 PID 2760 wrote to memory of 2656 2760 cmd.exe 34 PID 2760 wrote to memory of 2700 2760 cmd.exe 37 PID 2760 wrote to memory of 2700 2760 cmd.exe 37 PID 2760 wrote to memory of 2700 2760 cmd.exe 37 PID 2028 wrote to memory of 1480 2028 svchost.exe 39 PID 2028 wrote to memory of 1480 2028 svchost.exe 39 PID 2028 wrote to memory of 1480 2028 svchost.exe 39 PID 1480 wrote to memory of 896 1480 cmd.exe 41 PID 1480 wrote to memory of 896 1480 cmd.exe 41 PID 1480 wrote to memory of 896 1480 cmd.exe 41 PID 1480 wrote to memory of 2600 1480 cmd.exe 42 PID 1480 wrote to memory of 2600 1480 cmd.exe 42 PID 1480 wrote to memory of 2600 1480 cmd.exe 42 PID 2028 wrote to memory of 1668 2028 svchost.exe 43 PID 2028 wrote to memory of 1668 2028 svchost.exe 43 PID 2028 wrote to memory of 1668 2028 svchost.exe 43 PID 1668 wrote to memory of 1680 1668 cmd.exe 45 PID 1668 wrote to memory of 1680 1668 cmd.exe 45 PID 1668 wrote to memory of 1680 1668 cmd.exe 45 PID 2028 wrote to memory of 1340 2028 svchost.exe 49 PID 2028 wrote to memory of 1340 2028 svchost.exe 49 PID 2028 wrote to memory of 1340 2028 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\wertg.exe"C:\Users\Admin\AppData\Local\Temp\wertg.exe"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2616 -
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:2028 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2760 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2656
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2700
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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:1480 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:896
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2600
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1668 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1680
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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:1340
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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:1660
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1712
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1400
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
601B
MD5901bd8edab06d026fa09bdd47b02f5ad
SHA1ecd6ebf92941094bafd479d3b88afc8733a53aab
SHA256c21b50fb70d2afdb75ea0f194e8ccc35c62e9e229b2fc3a53f672b33a4c1f629
SHA5124d8d49182efead6eb4b5800a41abbf0ad85680330899fc987f79ece1b1422ca90b7834fd3fdb308165ba14537fe9faf3e5f1e23bdfcd0cb492f1f0859cb86ae7
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Filesize
652KB
MD559db985c17a4ab06d3a0fbbb39ac045e
SHA12622da604c4be6f2b8ad06cb2fa55d412ba53ece
SHA2569a065bd64cf7f9f4d1385bfd9df86325e03f8dd64d0a3af56cfd05a7b28c3247
SHA5128a0a2bb31c37ea27aeaa5f9b1e5f5ce3a42cecca8bdddb00b622bb722c4d7a2e36442b7c628d17629974676278aa0703e1088984599cf216eb2ff6e6a2f995a4
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0