Analysis
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max time kernel
120s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20241010-en -
resource tags
arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system -
submitted
18-02-2025 09:39
Behavioral task
behavioral1
Sample
VBNFR_.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
VBNFR_.exe
Resource
win10v2004-20250217-en
General
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Target
VBNFR_.exe
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Size
279KB
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MD5
eced539ad810466a59e0433c892ad565
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SHA1
8ad3bcc29bf32e6dad21db3338d8fd339d0c4b61
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SHA256
f9f77ed5eb391d49883b6581aa0ddf32772d6e1ad8cf401277dfaf87ca7ee4e3
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SHA512
583668b2f0c75f5efba8afc39d66e8e9ca16ff5eadeb495dce7e837dd5a0ecc0001065e7add10d6bafad24014722510ca2647280fc5f9f6e882fa9357937a9cb
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SSDEEP
6144:pcH9nKVIEcXMVUHfwpZ6DzZmSkPcb8cfaRq7+7NE:phVQXkUHfEZ6pmhkb8UaRu+7NE
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/2904-1-0x0000000001370000-0x00000000013BC000-memory.dmp family_chaos behavioral1/files/0x000d000000012263-7.dat family_chaos behavioral1/memory/664-8-0x0000000000F80000-0x0000000000FCC000-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 2176 bcdedit.exe 2488 bcdedit.exe -
pid Process 2192 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\SaloXaxlostan.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 664 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\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\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Administrative Tools\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\Local\Microsoft\Feeds Cache\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\All Users\Microsoft\Windows\Ringtones\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Temporary Internet Files\Content.IE5\SEGJVAZC\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\Local\Microsoft\Feeds Cache\ADWO43R6\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\Public\Recorded TV\Sample Media\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\Temporary Internet Files\Content.IE5\BBWU148F\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\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\Admin\Music\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\Favorites\Links\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\G0UQMQ1C\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\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\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\Start Menu\Programs\Accessories\System Tools\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\Default\AppData\Roaming\Microsoft\Windows\SendTo\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\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\Contacts\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\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\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Documents\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\Public\Recorded TV\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\Administrative Tools\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\All Users\Microsoft\Windows\Start Menu\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\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ubq0xz77n.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 2676 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1048 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2904 VBNFR_.exe 664 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2904 VBNFR_.exe 2904 VBNFR_.exe 2904 VBNFR_.exe 664 svchost.exe 664 svchost.exe 664 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2904 VBNFR_.exe Token: SeDebugPrivilege 664 svchost.exe Token: SeBackupPrivilege 2740 vssvc.exe Token: SeRestorePrivilege 2740 vssvc.exe Token: SeAuditPrivilege 2740 vssvc.exe Token: SeIncreaseQuotaPrivilege 2536 WMIC.exe Token: SeSecurityPrivilege 2536 WMIC.exe Token: SeTakeOwnershipPrivilege 2536 WMIC.exe Token: SeLoadDriverPrivilege 2536 WMIC.exe Token: SeSystemProfilePrivilege 2536 WMIC.exe Token: SeSystemtimePrivilege 2536 WMIC.exe Token: SeProfSingleProcessPrivilege 2536 WMIC.exe Token: SeIncBasePriorityPrivilege 2536 WMIC.exe Token: SeCreatePagefilePrivilege 2536 WMIC.exe Token: SeBackupPrivilege 2536 WMIC.exe Token: SeRestorePrivilege 2536 WMIC.exe Token: SeShutdownPrivilege 2536 WMIC.exe Token: SeDebugPrivilege 2536 WMIC.exe Token: SeSystemEnvironmentPrivilege 2536 WMIC.exe Token: SeRemoteShutdownPrivilege 2536 WMIC.exe Token: SeUndockPrivilege 2536 WMIC.exe Token: SeManageVolumePrivilege 2536 WMIC.exe Token: 33 2536 WMIC.exe Token: 34 2536 WMIC.exe Token: 35 2536 WMIC.exe Token: SeIncreaseQuotaPrivilege 2536 WMIC.exe Token: SeSecurityPrivilege 2536 WMIC.exe Token: SeTakeOwnershipPrivilege 2536 WMIC.exe Token: SeLoadDriverPrivilege 2536 WMIC.exe Token: SeSystemProfilePrivilege 2536 WMIC.exe Token: SeSystemtimePrivilege 2536 WMIC.exe Token: SeProfSingleProcessPrivilege 2536 WMIC.exe Token: SeIncBasePriorityPrivilege 2536 WMIC.exe Token: SeCreatePagefilePrivilege 2536 WMIC.exe Token: SeBackupPrivilege 2536 WMIC.exe Token: SeRestorePrivilege 2536 WMIC.exe Token: SeShutdownPrivilege 2536 WMIC.exe Token: SeDebugPrivilege 2536 WMIC.exe Token: SeSystemEnvironmentPrivilege 2536 WMIC.exe Token: SeRemoteShutdownPrivilege 2536 WMIC.exe Token: SeUndockPrivilege 2536 WMIC.exe Token: SeManageVolumePrivilege 2536 WMIC.exe Token: 33 2536 WMIC.exe Token: 34 2536 WMIC.exe Token: 35 2536 WMIC.exe Token: SeBackupPrivilege 2260 wbengine.exe Token: SeRestorePrivilege 2260 wbengine.exe Token: SeSecurityPrivilege 2260 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2904 wrote to memory of 664 2904 VBNFR_.exe 30 PID 2904 wrote to memory of 664 2904 VBNFR_.exe 30 PID 2904 wrote to memory of 664 2904 VBNFR_.exe 30 PID 664 wrote to memory of 2720 664 svchost.exe 31 PID 664 wrote to memory of 2720 664 svchost.exe 31 PID 664 wrote to memory of 2720 664 svchost.exe 31 PID 2720 wrote to memory of 2676 2720 cmd.exe 33 PID 2720 wrote to memory of 2676 2720 cmd.exe 33 PID 2720 wrote to memory of 2676 2720 cmd.exe 33 PID 2720 wrote to memory of 2536 2720 cmd.exe 36 PID 2720 wrote to memory of 2536 2720 cmd.exe 36 PID 2720 wrote to memory of 2536 2720 cmd.exe 36 PID 664 wrote to memory of 2288 664 svchost.exe 38 PID 664 wrote to memory of 2288 664 svchost.exe 38 PID 664 wrote to memory of 2288 664 svchost.exe 38 PID 2288 wrote to memory of 2176 2288 cmd.exe 40 PID 2288 wrote to memory of 2176 2288 cmd.exe 40 PID 2288 wrote to memory of 2176 2288 cmd.exe 40 PID 2288 wrote to memory of 2488 2288 cmd.exe 41 PID 2288 wrote to memory of 2488 2288 cmd.exe 41 PID 2288 wrote to memory of 2488 2288 cmd.exe 41 PID 664 wrote to memory of 2396 664 svchost.exe 42 PID 664 wrote to memory of 2396 664 svchost.exe 42 PID 664 wrote to memory of 2396 664 svchost.exe 42 PID 2396 wrote to memory of 2192 2396 cmd.exe 44 PID 2396 wrote to memory of 2192 2396 cmd.exe 44 PID 2396 wrote to memory of 2192 2396 cmd.exe 44 PID 664 wrote to memory of 1048 664 svchost.exe 49 PID 664 wrote to memory of 1048 664 svchost.exe 49 PID 664 wrote to memory of 1048 664 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\VBNFR_.exe"C:\Users\Admin\AppData\Local\Temp\VBNFR_.exe"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2904 -
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:664 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2720 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2676
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2536
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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:2288 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2176
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2488
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2396 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2192
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\SaloXaxlostan.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1048
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2740
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2260
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3056
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2448
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
971B
MD55d1bd54f7357bc1f0328b6a54cace8c3
SHA10e3c9c9823f17de35affb7d0471915d07da88cc4
SHA25611564577b46ba88ba9e0cd68b0bf758539edc0b2737e2b901b972df98cb26759
SHA512ac8de963a86f2bfbe57f4e34287c99222c7c848815b83f92c6b5aec1b5e8367625a6ecd80215f54c9daad05f4c8acb13277cb9ed3bb071aa1c1575db0450eb1c
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Filesize
279KB
MD5eced539ad810466a59e0433c892ad565
SHA18ad3bcc29bf32e6dad21db3338d8fd339d0c4b61
SHA256f9f77ed5eb391d49883b6581aa0ddf32772d6e1ad8cf401277dfaf87ca7ee4e3
SHA512583668b2f0c75f5efba8afc39d66e8e9ca16ff5eadeb495dce7e837dd5a0ecc0001065e7add10d6bafad24014722510ca2647280fc5f9f6e882fa9357937a9cb
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0