Analysis
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max time kernel
130s -
max time network
136s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
11/02/2022, 07:02
Static task
static1
Behavioral task
behavioral1
Sample
0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe
Resource
win10v2004-en-20220113
General
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Target
0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe
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Size
314KB
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MD5
9ccf43bbfaccb1a377e0b87f3f7f538c
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SHA1
91d70b30f9232435776d0f6839f6ff7ac4fb586d
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SHA256
0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56
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SHA512
64373dc9798701747581c01bb21c4ba672c948e4232b4d1db8ec6a492581147451e31509a3e3f2be647fd4cea95783b4c83f7764f181508ae20c4887001a672c
Malware Config
Extracted
C:\Users\Admin\Desktop\read_me.txt
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral1/memory/1404-54-0x0000000000320000-0x0000000000374000-memory.dmp family_chaos behavioral1/files/0x000800000001227a-56.dat family_chaos behavioral1/files/0x000800000001227a-57.dat family_chaos behavioral1/memory/672-58-0x0000000000CC0000-0x0000000000D14000-memory.dmp 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
pid Process 912 bcdedit.exe 1316 bcdedit.exe -
pid Process 1612 wbadmin.exe -
Executes dropped EXE 1 IoCs
pid Process 672 svchost.exe -
Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\MoveAdd.raw => C:\Users\Admin\Pictures\MoveAdd.raw.shq svchost.exe File renamed C:\Users\Admin\Pictures\ResolveNew.tif => C:\Users\Admin\Pictures\ResolveNew.tif.shq svchost.exe File renamed C:\Users\Admin\Pictures\WatchClose.raw => C:\Users\Admin\Pictures\WatchClose.raw.shq svchost.exe File renamed C:\Users\Admin\Pictures\ConnectClose.png => C:\Users\Admin\Pictures\ConnectClose.png.shq svchost.exe -
Drops startup file 3 IoCs
description 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_me.txt 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) 33 IoCs
description ioc Process 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\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\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\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\Internet Explorer\Quick Launch\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\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\Roaming\Microsoft\Windows\Start Menu\Programs\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\Public\Pictures\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Start Menu\Programs\Administrative 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\Saved Games\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\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\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-1-5-21-3846991908-3261386348-1409841751-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\0apsk7nhn.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1572 vssadmin.exe -
Modifies registry class 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache rundll32.exe -
Opens file in notepad (likely ransom note) 5 IoCs
pid Process 1652 NOTEPAD.EXE 1600 NOTEPAD.EXE 1628 NOTEPAD.EXE 1120 NOTEPAD.EXE 228 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 672 svchost.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 1404 0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe 1404 0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe 672 svchost.exe 672 svchost.exe 672 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1612 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1404 0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe Token: SeDebugPrivilege 672 svchost.exe Token: SeBackupPrivilege 872 vssvc.exe Token: SeRestorePrivilege 872 vssvc.exe Token: SeAuditPrivilege 872 vssvc.exe Token: SeIncreaseQuotaPrivilege 1992 WMIC.exe Token: SeSecurityPrivilege 1992 WMIC.exe Token: SeTakeOwnershipPrivilege 1992 WMIC.exe Token: SeLoadDriverPrivilege 1992 WMIC.exe Token: SeSystemProfilePrivilege 1992 WMIC.exe Token: SeSystemtimePrivilege 1992 WMIC.exe Token: SeProfSingleProcessPrivilege 1992 WMIC.exe Token: SeIncBasePriorityPrivilege 1992 WMIC.exe Token: SeCreatePagefilePrivilege 1992 WMIC.exe Token: SeBackupPrivilege 1992 WMIC.exe Token: SeRestorePrivilege 1992 WMIC.exe Token: SeShutdownPrivilege 1992 WMIC.exe Token: SeDebugPrivilege 1992 WMIC.exe Token: SeSystemEnvironmentPrivilege 1992 WMIC.exe Token: SeRemoteShutdownPrivilege 1992 WMIC.exe Token: SeUndockPrivilege 1992 WMIC.exe Token: SeManageVolumePrivilege 1992 WMIC.exe Token: 33 1992 WMIC.exe Token: 34 1992 WMIC.exe Token: 35 1992 WMIC.exe Token: SeIncreaseQuotaPrivilege 1992 WMIC.exe Token: SeSecurityPrivilege 1992 WMIC.exe Token: SeTakeOwnershipPrivilege 1992 WMIC.exe Token: SeLoadDriverPrivilege 1992 WMIC.exe Token: SeSystemProfilePrivilege 1992 WMIC.exe Token: SeSystemtimePrivilege 1992 WMIC.exe Token: SeProfSingleProcessPrivilege 1992 WMIC.exe Token: SeIncBasePriorityPrivilege 1992 WMIC.exe Token: SeCreatePagefilePrivilege 1992 WMIC.exe Token: SeBackupPrivilege 1992 WMIC.exe Token: SeRestorePrivilege 1992 WMIC.exe Token: SeShutdownPrivilege 1992 WMIC.exe Token: SeDebugPrivilege 1992 WMIC.exe Token: SeSystemEnvironmentPrivilege 1992 WMIC.exe Token: SeRemoteShutdownPrivilege 1992 WMIC.exe Token: SeUndockPrivilege 1992 WMIC.exe Token: SeManageVolumePrivilege 1992 WMIC.exe Token: 33 1992 WMIC.exe Token: 34 1992 WMIC.exe Token: 35 1992 WMIC.exe Token: SeBackupPrivilege 472 wbengine.exe Token: SeRestorePrivilege 472 wbengine.exe Token: SeSecurityPrivilege 472 wbengine.exe -
Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 1404 wrote to memory of 672 1404 0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe 27 PID 1404 wrote to memory of 672 1404 0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe 27 PID 1404 wrote to memory of 672 1404 0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe 27 PID 672 wrote to memory of 1468 672 svchost.exe 34 PID 672 wrote to memory of 1468 672 svchost.exe 34 PID 672 wrote to memory of 1468 672 svchost.exe 34 PID 1612 wrote to memory of 1652 1612 rundll32.exe 30 PID 1612 wrote to memory of 1652 1612 rundll32.exe 30 PID 1612 wrote to memory of 1652 1612 rundll32.exe 30 PID 1612 wrote to memory of 1628 1612 rundll32.exe 32 PID 1612 wrote to memory of 1628 1612 rundll32.exe 32 PID 1612 wrote to memory of 1628 1612 rundll32.exe 32 PID 1612 wrote to memory of 1600 1612 rundll32.exe 31 PID 1612 wrote to memory of 1600 1612 rundll32.exe 31 PID 1612 wrote to memory of 1600 1612 rundll32.exe 31 PID 1468 wrote to memory of 1572 1468 cmd.exe 37 PID 1468 wrote to memory of 1572 1468 cmd.exe 37 PID 1468 wrote to memory of 1572 1468 cmd.exe 37 PID 1468 wrote to memory of 1992 1468 cmd.exe 43 PID 1468 wrote to memory of 1992 1468 cmd.exe 43 PID 1468 wrote to memory of 1992 1468 cmd.exe 43 PID 672 wrote to memory of 592 672 svchost.exe 45 PID 672 wrote to memory of 592 672 svchost.exe 45 PID 672 wrote to memory of 592 672 svchost.exe 45 PID 592 wrote to memory of 912 592 cmd.exe 47 PID 592 wrote to memory of 912 592 cmd.exe 47 PID 592 wrote to memory of 912 592 cmd.exe 47 PID 592 wrote to memory of 1316 592 cmd.exe 48 PID 592 wrote to memory of 1316 592 cmd.exe 48 PID 592 wrote to memory of 1316 592 cmd.exe 48 PID 672 wrote to memory of 1368 672 svchost.exe 49 PID 672 wrote to memory of 1368 672 svchost.exe 49 PID 672 wrote to memory of 1368 672 svchost.exe 49 PID 1368 wrote to memory of 1612 1368 cmd.exe 51 PID 1368 wrote to memory of 1612 1368 cmd.exe 51 PID 1368 wrote to memory of 1612 1368 cmd.exe 51 PID 672 wrote to memory of 228 672 svchost.exe 55 PID 672 wrote to memory of 228 672 svchost.exe 55 PID 672 wrote to memory of 228 672 svchost.exe 55
Processes
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C:\Users\Admin\AppData\Local\Temp\0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe"C:\Users\Admin\AppData\Local\Temp\0a144c8c7a27b14415064cf3e8a031fa19b59970427c1d00b9bf4a129fc94c56.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1404 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Drops startup file
- 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:672 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1468 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1572
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1992
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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:592 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:912
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1316
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1368 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1612
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_me.txt3⤵
- Opens file in notepad (likely ransom note)
PID:228
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\WriteExpand.ppsm.shq1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1612 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\WriteExpand.ppsm.shq2⤵
- Opens file in notepad (likely ransom note)
PID:1652
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\WriteExpand.ppsm.shq2⤵
- Opens file in notepad (likely ransom note)
PID:1600
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\WriteExpand.ppsm.shq2⤵
- Opens file in notepad (likely ransom note)
PID:1628
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:872
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\read_me.txt1⤵
- Opens file in notepad (likely ransom note)
PID:1120
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:472
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1600
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1112