Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20250207-en -
resource tags
arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system -
submitted
15-02-2025 20:32
Behavioral task
behavioral1
Sample
2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe
Resource
win7-20250207-en
Behavioral task
behavioral2
Sample
2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe
Resource
win10v2004-20250211-en
General
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Target
2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe
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Size
27KB
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MD5
a0feb977ec93ffe5939ff03e81f7eda7
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SHA1
4b02f7dc42e715bf54492cbfe0f0f5dccec1729e
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SHA256
da00e98797600787431cb3c4c5d2771b2c3f235848247f7ab8c98453bb16b654
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SHA512
10732bc014891dee37f84d3fb91da1c804151379cd1df54a8472199ebb05fae6ab018d35142c91a932027ff29af9ae3b9659ca64a9448207800958a92210f3f6
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SSDEEP
384:8tWZPzzxAm1vW5Z2pzh71+kuzxBSKr0nlMUOy5o91WB1Fd82vEl:B7zxAm6Shgku26nUho94vP828l
Malware Config
Extracted
C:\ProgramData\Adobe\Updater6\decrypt.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/324-1-0x00000000012B0000-0x00000000012BE000-memory.dmp family_chaos behavioral1/memory/2548-8-0x0000000000120000-0x000000000012E000-memory.dmp family_chaos behavioral1/files/0x000a0000000120e5-7.dat 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 2180 bcdedit.exe 2520 bcdedit.exe -
pid Process 1588 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\decrypt.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2548 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-1-5-21-677481364-2238709445-1347953534-1000\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\Public\Downloads\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\05JF5XCW\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\Default\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\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\Recent\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\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\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\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\GII6F5KT\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\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\L8L5LT1I\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\All Users\Microsoft\Windows\Start Menu\Programs\Games\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\8IHN5N04\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\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\Local\Microsoft\Feeds Cache\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\Default\AppData\Roaming\Microsoft\Windows\SendTo\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\Local\Microsoft\Windows\Burn\Burn\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\SHJ9WA7E\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\Videos\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\IIIOELH0\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\AppData\Local\Microsoft\Windows\History\History.IE5\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\Local\Microsoft\Feeds Cache\07ABS1DK\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\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-677481364-2238709445-1347953534-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\KZ8AGS28\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\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\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.
pid Process 2952 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2584 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2548 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe 2548 svchost.exe 2548 svchost.exe 2548 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 2548 svchost.exe Token: SeBackupPrivilege 2476 vssvc.exe Token: SeRestorePrivilege 2476 vssvc.exe Token: SeAuditPrivilege 2476 vssvc.exe Token: SeIncreaseQuotaPrivilege 2840 WMIC.exe Token: SeSecurityPrivilege 2840 WMIC.exe Token: SeTakeOwnershipPrivilege 2840 WMIC.exe Token: SeLoadDriverPrivilege 2840 WMIC.exe Token: SeSystemProfilePrivilege 2840 WMIC.exe Token: SeSystemtimePrivilege 2840 WMIC.exe Token: SeProfSingleProcessPrivilege 2840 WMIC.exe Token: SeIncBasePriorityPrivilege 2840 WMIC.exe Token: SeCreatePagefilePrivilege 2840 WMIC.exe Token: SeBackupPrivilege 2840 WMIC.exe Token: SeRestorePrivilege 2840 WMIC.exe Token: SeShutdownPrivilege 2840 WMIC.exe Token: SeDebugPrivilege 2840 WMIC.exe Token: SeSystemEnvironmentPrivilege 2840 WMIC.exe Token: SeRemoteShutdownPrivilege 2840 WMIC.exe Token: SeUndockPrivilege 2840 WMIC.exe Token: SeManageVolumePrivilege 2840 WMIC.exe Token: 33 2840 WMIC.exe Token: 34 2840 WMIC.exe Token: 35 2840 WMIC.exe Token: SeIncreaseQuotaPrivilege 2840 WMIC.exe Token: SeSecurityPrivilege 2840 WMIC.exe Token: SeTakeOwnershipPrivilege 2840 WMIC.exe Token: SeLoadDriverPrivilege 2840 WMIC.exe Token: SeSystemProfilePrivilege 2840 WMIC.exe Token: SeSystemtimePrivilege 2840 WMIC.exe Token: SeProfSingleProcessPrivilege 2840 WMIC.exe Token: SeIncBasePriorityPrivilege 2840 WMIC.exe Token: SeCreatePagefilePrivilege 2840 WMIC.exe Token: SeBackupPrivilege 2840 WMIC.exe Token: SeRestorePrivilege 2840 WMIC.exe Token: SeShutdownPrivilege 2840 WMIC.exe Token: SeDebugPrivilege 2840 WMIC.exe Token: SeSystemEnvironmentPrivilege 2840 WMIC.exe Token: SeRemoteShutdownPrivilege 2840 WMIC.exe Token: SeUndockPrivilege 2840 WMIC.exe Token: SeManageVolumePrivilege 2840 WMIC.exe Token: 33 2840 WMIC.exe Token: 34 2840 WMIC.exe Token: 35 2840 WMIC.exe Token: SeBackupPrivilege 2320 wbengine.exe Token: SeRestorePrivilege 2320 wbengine.exe Token: SeSecurityPrivilege 2320 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 324 wrote to memory of 2548 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe 30 PID 324 wrote to memory of 2548 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe 30 PID 324 wrote to memory of 2548 324 2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe 30 PID 2548 wrote to memory of 2812 2548 svchost.exe 31 PID 2548 wrote to memory of 2812 2548 svchost.exe 31 PID 2548 wrote to memory of 2812 2548 svchost.exe 31 PID 2812 wrote to memory of 2952 2812 cmd.exe 33 PID 2812 wrote to memory of 2952 2812 cmd.exe 33 PID 2812 wrote to memory of 2952 2812 cmd.exe 33 PID 2812 wrote to memory of 2840 2812 cmd.exe 36 PID 2812 wrote to memory of 2840 2812 cmd.exe 36 PID 2812 wrote to memory of 2840 2812 cmd.exe 36 PID 2548 wrote to memory of 2140 2548 svchost.exe 38 PID 2548 wrote to memory of 2140 2548 svchost.exe 38 PID 2548 wrote to memory of 2140 2548 svchost.exe 38 PID 2140 wrote to memory of 2180 2140 cmd.exe 40 PID 2140 wrote to memory of 2180 2140 cmd.exe 40 PID 2140 wrote to memory of 2180 2140 cmd.exe 40 PID 2140 wrote to memory of 2520 2140 cmd.exe 41 PID 2140 wrote to memory of 2520 2140 cmd.exe 41 PID 2140 wrote to memory of 2520 2140 cmd.exe 41 PID 2548 wrote to memory of 2652 2548 svchost.exe 42 PID 2548 wrote to memory of 2652 2548 svchost.exe 42 PID 2548 wrote to memory of 2652 2548 svchost.exe 42 PID 2652 wrote to memory of 1588 2652 cmd.exe 44 PID 2652 wrote to memory of 1588 2652 cmd.exe 44 PID 2652 wrote to memory of 1588 2652 cmd.exe 44 PID 2548 wrote to memory of 2584 2548 svchost.exe 49 PID 2548 wrote to memory of 2584 2548 svchost.exe 49 PID 2548 wrote to memory of 2584 2548 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\2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2025-02-15_a0feb977ec93ffe5939ff03e81f7eda7_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:324 -
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)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2548 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2812 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2952
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2840
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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:2140 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2180
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2520
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2652 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1588
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\decrypt.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2584
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2476
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2320
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1412
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:3040
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
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
588B
MD5c7d974de3a522580c6ac4787958c6075
SHA1262b1ec5da188a2c16f24532620a01551aa951e3
SHA256f420643fbabef7cf8fb4d6ee192ef51589971d36c0c0091df10807551c32b16a
SHA51214b73a95b0f105c86135bca8c9f608b7f42df6531ddf2b8e4b51864fcd5fe7b1a1e70dcbebec80789bc10d6e116d6610b0f6373e7f499e6a3d23c47be717d65f
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Filesize
27KB
MD5a0feb977ec93ffe5939ff03e81f7eda7
SHA14b02f7dc42e715bf54492cbfe0f0f5dccec1729e
SHA256da00e98797600787431cb3c4c5d2771b2c3f235848247f7ab8c98453bb16b654
SHA51210732bc014891dee37f84d3fb91da1c804151379cd1df54a8472199ebb05fae6ab018d35142c91a932027ff29af9ae3b9659ca64a9448207800958a92210f3f6
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0