Analysis
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max time kernel
119s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
14-03-2024 18:52
Behavioral task
behavioral1
Sample
Version 2.8.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
Version 2.8.exe
Resource
win10v2004-20240226-en
General
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Target
Version 2.8.exe
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Size
223KB
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MD5
77a0989f046d5404700debc97727ca2b
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SHA1
d0bdfdc67862e0bfa491d5d4a3313382a7921625
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SHA256
99b88ce97064536c370e630245018b15bf87c0c1113e2c4c95bfb7dc1078b647
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SHA512
f918e3bf1d488cb77f06ede3d565396b8a6391f372e79fd6d148e1afec311143332bd91cb6d3f05fd6b348d40bfd4ae02adc79e20c6031aaa08c1d29d5b83aa9
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SSDEEP
6144:EU9r9SAYFCtntIVprUPvEefILCrSK3FK+Z:EUDYFCtntIVqPvCLCrSK1K+Z
Malware Config
Extracted
C:\Users\Admin\Desktop\read_it.txt
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
Processes:
resource yara_rule behavioral1/memory/2856-0-0x00000000003F0000-0x000000000042E000-memory.dmp family_chaos behavioral1/memory/2408-7-0x0000000001020000-0x000000000105E000-memory.dmp family_chaos C:\Users\Admin\AppData\Roaming\svchost.exe family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
Processes:
bcdedit.exebcdedit.exepid process 1632 bcdedit.exe 1580 bcdedit.exe -
Processes:
wbadmin.exepid process 1520 wbadmin.exe -
Drops startup file 3 IoCs
Processes:
svchost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe 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
Processes:
svchost.exepid process 2408 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 34 IoCs
Processes:
svchost.exedescription ioc process File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Roaming\Microsoft\Windows\Start Menu\Programs\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\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3452737119-3959686427-228443150-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\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\Favorites\Links for United States\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\Roaming\Microsoft\Internet Explorer\Quick Launch\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\SendTo\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\j8kuwlgra.jpg" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.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 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 2472 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 548 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 2408 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
Version 2.8.exesvchost.exepid process 2856 Version 2.8.exe 2856 Version 2.8.exe 2408 svchost.exe 2408 svchost.exe 2408 svchost.exe 2408 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
Version 2.8.exesvchost.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 2856 Version 2.8.exe Token: SeDebugPrivilege 2408 svchost.exe Token: SeBackupPrivilege 2576 vssvc.exe Token: SeRestorePrivilege 2576 vssvc.exe Token: SeAuditPrivilege 2576 vssvc.exe Token: SeIncreaseQuotaPrivilege 304 WMIC.exe Token: SeSecurityPrivilege 304 WMIC.exe Token: SeTakeOwnershipPrivilege 304 WMIC.exe Token: SeLoadDriverPrivilege 304 WMIC.exe Token: SeSystemProfilePrivilege 304 WMIC.exe Token: SeSystemtimePrivilege 304 WMIC.exe Token: SeProfSingleProcessPrivilege 304 WMIC.exe Token: SeIncBasePriorityPrivilege 304 WMIC.exe Token: SeCreatePagefilePrivilege 304 WMIC.exe Token: SeBackupPrivilege 304 WMIC.exe Token: SeRestorePrivilege 304 WMIC.exe Token: SeShutdownPrivilege 304 WMIC.exe Token: SeDebugPrivilege 304 WMIC.exe Token: SeSystemEnvironmentPrivilege 304 WMIC.exe Token: SeRemoteShutdownPrivilege 304 WMIC.exe Token: SeUndockPrivilege 304 WMIC.exe Token: SeManageVolumePrivilege 304 WMIC.exe Token: 33 304 WMIC.exe Token: 34 304 WMIC.exe Token: 35 304 WMIC.exe Token: SeIncreaseQuotaPrivilege 304 WMIC.exe Token: SeSecurityPrivilege 304 WMIC.exe Token: SeTakeOwnershipPrivilege 304 WMIC.exe Token: SeLoadDriverPrivilege 304 WMIC.exe Token: SeSystemProfilePrivilege 304 WMIC.exe Token: SeSystemtimePrivilege 304 WMIC.exe Token: SeProfSingleProcessPrivilege 304 WMIC.exe Token: SeIncBasePriorityPrivilege 304 WMIC.exe Token: SeCreatePagefilePrivilege 304 WMIC.exe Token: SeBackupPrivilege 304 WMIC.exe Token: SeRestorePrivilege 304 WMIC.exe Token: SeShutdownPrivilege 304 WMIC.exe Token: SeDebugPrivilege 304 WMIC.exe Token: SeSystemEnvironmentPrivilege 304 WMIC.exe Token: SeRemoteShutdownPrivilege 304 WMIC.exe Token: SeUndockPrivilege 304 WMIC.exe Token: SeManageVolumePrivilege 304 WMIC.exe Token: 33 304 WMIC.exe Token: 34 304 WMIC.exe Token: 35 304 WMIC.exe Token: SeBackupPrivilege 2256 wbengine.exe Token: SeRestorePrivilege 2256 wbengine.exe Token: SeSecurityPrivilege 2256 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
Version 2.8.exesvchost.execmd.execmd.execmd.exedescription pid process target process PID 2856 wrote to memory of 2408 2856 Version 2.8.exe svchost.exe PID 2856 wrote to memory of 2408 2856 Version 2.8.exe svchost.exe PID 2856 wrote to memory of 2408 2856 Version 2.8.exe svchost.exe PID 2408 wrote to memory of 2628 2408 svchost.exe cmd.exe PID 2408 wrote to memory of 2628 2408 svchost.exe cmd.exe PID 2408 wrote to memory of 2628 2408 svchost.exe cmd.exe PID 2628 wrote to memory of 2472 2628 cmd.exe vssadmin.exe PID 2628 wrote to memory of 2472 2628 cmd.exe vssadmin.exe PID 2628 wrote to memory of 2472 2628 cmd.exe vssadmin.exe PID 2628 wrote to memory of 304 2628 cmd.exe WMIC.exe PID 2628 wrote to memory of 304 2628 cmd.exe WMIC.exe PID 2628 wrote to memory of 304 2628 cmd.exe WMIC.exe PID 2408 wrote to memory of 2012 2408 svchost.exe cmd.exe PID 2408 wrote to memory of 2012 2408 svchost.exe cmd.exe PID 2408 wrote to memory of 2012 2408 svchost.exe cmd.exe PID 2012 wrote to memory of 1632 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 1632 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 1632 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 1580 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 1580 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 1580 2012 cmd.exe bcdedit.exe PID 2408 wrote to memory of 1620 2408 svchost.exe cmd.exe PID 2408 wrote to memory of 1620 2408 svchost.exe cmd.exe PID 2408 wrote to memory of 1620 2408 svchost.exe cmd.exe PID 1620 wrote to memory of 1520 1620 cmd.exe wbadmin.exe PID 1620 wrote to memory of 1520 1620 cmd.exe wbadmin.exe PID 1620 wrote to memory of 1520 1620 cmd.exe wbadmin.exe PID 2408 wrote to memory of 548 2408 svchost.exe NOTEPAD.EXE PID 2408 wrote to memory of 548 2408 svchost.exe NOTEPAD.EXE PID 2408 wrote to memory of 548 2408 svchost.exe NOTEPAD.EXE -
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\Version 2.8.exe"C:\Users\Admin\AppData\Local\Temp\Version 2.8.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2856 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- 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:2408 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2628 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2472 -
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:304 -
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:2012 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1632 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1580 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1620 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1520 -
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:548
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2576
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2256
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2044
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2820
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
223KB
MD577a0989f046d5404700debc97727ca2b
SHA1d0bdfdc67862e0bfa491d5d4a3313382a7921625
SHA25699b88ce97064536c370e630245018b15bf87c0c1113e2c4c95bfb7dc1078b647
SHA512f918e3bf1d488cb77f06ede3d565396b8a6391f372e79fd6d148e1afec311143332bd91cb6d3f05fd6b348d40bfd4ae02adc79e20c6031aaa08c1d29d5b83aa9
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Filesize
1KB
MD5ea03cbb2fdf2dc96252b579612602225
SHA1ac9ceff3c368f7409b9a7201f62fa92eded4da51
SHA256e4f0c335d1ffc3ed4a32ae4aee294c9652f67a765fbaaad1f90e0540d25ed565
SHA5121388a3f740f84541f8a8c0298bfe8b71f03d86a71174f97a68edcb4bdca0f467d6823b94314fa54547451c3ec4f6bc2228d74bf7537acf7c2dfb9f5a2d398051