Analysis
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max time kernel
120s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
19-09-2024 07:18
Behavioral task
behavioral1
Sample
20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe
Resource
win10v2004-20240802-en
General
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Target
20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe
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Size
23KB
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MD5
a264ca73aaced0a81a0b7fa14bc201f4
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SHA1
77a1624cbc6d2d5066f7e23b42f05fd2703fb394
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SHA256
5404595684deb101a7d8d6a11c104dc1401151149f69cb9a60ebb223b6f7e5b2
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SHA512
d141ce0021b3352a79eb1401401f072e25fa06773ed567b9922d99967740e07a88e5d5b1daa77a61d9f8a53b51a36441c8e3c1a00a25de203ad05d82b1929ed4
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SSDEEP
384:y3Mg/bqo21q5D+WVZfpKkLOjXJ/r91CCAiMbdLej:Iqo2Sy6ptOjZ/r9BAiMblej
Malware Config
Extracted
C:\Users\Admin\Documents\READ_THIS.txt
chaos
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/2012-1-0x00000000010F0000-0x00000000010FC000-memory.dmp family_chaos C:\Users\Admin\AppData\Roaming\svchost.exe family_chaos behavioral1/memory/2404-7-0x0000000000DF0000-0x0000000000DFC000-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
Processes:
bcdedit.exebcdedit.exepid process 1532 bcdedit.exe 3020 bcdedit.exe -
Processes:
wbadmin.exepid process 564 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_THIS.txt svchost.exe -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 2404 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\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Libraries\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\Favorites\Links\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Administrative Tools\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3533259084-2542256011-65585152-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Searches\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\Pictures\desktop.ini 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.
Processes:
vssadmin.exepid process 1284 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 2532 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 2404 svchost.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exesvchost.exepid process 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe 2404 svchost.exe 2404 svchost.exe 2404 svchost.exe 2404 svchost.exe 2404 svchost.exe 2404 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exesvchost.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe Token: SeDebugPrivilege 2404 svchost.exe Token: SeBackupPrivilege 2164 vssvc.exe Token: SeRestorePrivilege 2164 vssvc.exe Token: SeAuditPrivilege 2164 vssvc.exe Token: SeIncreaseQuotaPrivilege 1664 WMIC.exe Token: SeSecurityPrivilege 1664 WMIC.exe Token: SeTakeOwnershipPrivilege 1664 WMIC.exe Token: SeLoadDriverPrivilege 1664 WMIC.exe Token: SeSystemProfilePrivilege 1664 WMIC.exe Token: SeSystemtimePrivilege 1664 WMIC.exe Token: SeProfSingleProcessPrivilege 1664 WMIC.exe Token: SeIncBasePriorityPrivilege 1664 WMIC.exe Token: SeCreatePagefilePrivilege 1664 WMIC.exe Token: SeBackupPrivilege 1664 WMIC.exe Token: SeRestorePrivilege 1664 WMIC.exe Token: SeShutdownPrivilege 1664 WMIC.exe Token: SeDebugPrivilege 1664 WMIC.exe Token: SeSystemEnvironmentPrivilege 1664 WMIC.exe Token: SeRemoteShutdownPrivilege 1664 WMIC.exe Token: SeUndockPrivilege 1664 WMIC.exe Token: SeManageVolumePrivilege 1664 WMIC.exe Token: 33 1664 WMIC.exe Token: 34 1664 WMIC.exe Token: 35 1664 WMIC.exe Token: SeIncreaseQuotaPrivilege 1664 WMIC.exe Token: SeSecurityPrivilege 1664 WMIC.exe Token: SeTakeOwnershipPrivilege 1664 WMIC.exe Token: SeLoadDriverPrivilege 1664 WMIC.exe Token: SeSystemProfilePrivilege 1664 WMIC.exe Token: SeSystemtimePrivilege 1664 WMIC.exe Token: SeProfSingleProcessPrivilege 1664 WMIC.exe Token: SeIncBasePriorityPrivilege 1664 WMIC.exe Token: SeCreatePagefilePrivilege 1664 WMIC.exe Token: SeBackupPrivilege 1664 WMIC.exe Token: SeRestorePrivilege 1664 WMIC.exe Token: SeShutdownPrivilege 1664 WMIC.exe Token: SeDebugPrivilege 1664 WMIC.exe Token: SeSystemEnvironmentPrivilege 1664 WMIC.exe Token: SeRemoteShutdownPrivilege 1664 WMIC.exe Token: SeUndockPrivilege 1664 WMIC.exe Token: SeManageVolumePrivilege 1664 WMIC.exe Token: 33 1664 WMIC.exe Token: 34 1664 WMIC.exe Token: 35 1664 WMIC.exe Token: SeBackupPrivilege 2248 wbengine.exe Token: SeRestorePrivilege 2248 wbengine.exe Token: SeSecurityPrivilege 2248 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exesvchost.execmd.execmd.execmd.exedescription pid process target process PID 2012 wrote to memory of 2404 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe svchost.exe PID 2012 wrote to memory of 2404 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe svchost.exe PID 2012 wrote to memory of 2404 2012 20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe svchost.exe PID 2404 wrote to memory of 2024 2404 svchost.exe cmd.exe PID 2404 wrote to memory of 2024 2404 svchost.exe cmd.exe PID 2404 wrote to memory of 2024 2404 svchost.exe cmd.exe PID 2024 wrote to memory of 1284 2024 cmd.exe vssadmin.exe PID 2024 wrote to memory of 1284 2024 cmd.exe vssadmin.exe PID 2024 wrote to memory of 1284 2024 cmd.exe vssadmin.exe PID 2024 wrote to memory of 1664 2024 cmd.exe WMIC.exe PID 2024 wrote to memory of 1664 2024 cmd.exe WMIC.exe PID 2024 wrote to memory of 1664 2024 cmd.exe WMIC.exe PID 2404 wrote to memory of 1992 2404 svchost.exe cmd.exe PID 2404 wrote to memory of 1992 2404 svchost.exe cmd.exe PID 2404 wrote to memory of 1992 2404 svchost.exe cmd.exe PID 1992 wrote to memory of 1532 1992 cmd.exe bcdedit.exe PID 1992 wrote to memory of 1532 1992 cmd.exe bcdedit.exe PID 1992 wrote to memory of 1532 1992 cmd.exe bcdedit.exe PID 1992 wrote to memory of 3020 1992 cmd.exe bcdedit.exe PID 1992 wrote to memory of 3020 1992 cmd.exe bcdedit.exe PID 1992 wrote to memory of 3020 1992 cmd.exe bcdedit.exe PID 2404 wrote to memory of 3024 2404 svchost.exe cmd.exe PID 2404 wrote to memory of 3024 2404 svchost.exe cmd.exe PID 2404 wrote to memory of 3024 2404 svchost.exe cmd.exe PID 3024 wrote to memory of 564 3024 cmd.exe wbadmin.exe PID 3024 wrote to memory of 564 3024 cmd.exe wbadmin.exe PID 3024 wrote to memory of 564 3024 cmd.exe wbadmin.exe PID 2404 wrote to memory of 2532 2404 svchost.exe NOTEPAD.EXE PID 2404 wrote to memory of 2532 2404 svchost.exe NOTEPAD.EXE PID 2404 wrote to memory of 2532 2404 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\20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe"C:\Users\Admin\AppData\Local\Temp\20240919a264ca73aaced0a81a0b7fa14bc201f4chaosdestroyerwannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2012 -
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)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2404 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2024 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1284 -
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1664 -
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:1992 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1532 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3020 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3024 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:564 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_THIS.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2532
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2164
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2248
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1740
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2364
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
23KB
MD5a264ca73aaced0a81a0b7fa14bc201f4
SHA177a1624cbc6d2d5066f7e23b42f05fd2703fb394
SHA2565404595684deb101a7d8d6a11c104dc1401151149f69cb9a60ebb223b6f7e5b2
SHA512d141ce0021b3352a79eb1401401f072e25fa06773ed567b9922d99967740e07a88e5d5b1daa77a61d9f8a53b51a36441c8e3c1a00a25de203ad05d82b1929ed4
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Filesize
985B
MD546839c94712706c9b4bea9c0b5f89693
SHA1af8af5265aa72bd8c30c63d7999f7f52c738b9ff
SHA2564afb727589a35a9ee9422855723f7e8a6b95a09e72d1683c57f92b3e3e0e9ca6
SHA512afd0bae86ab302883f83f1ab0534fb6a49d45a155e7320958387dc5a2721f854c6cd34f546931ea3b8da932b8f8bb13e0869d42b41684671cd606fb4023db382