Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
07-11-2024 09:37
Behavioral task
behavioral1
Sample
2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe
Resource
win10v2004-20241007-en
General
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Target
2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe
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Size
352KB
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MD5
bcf9a3f92706b2cb338459dd52488472
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SHA1
5e31b8509abc813d474577c6785e961ced7cc697
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SHA256
1229e2bf183c624411a3ee4efb10a27a500593b36c9f2643d1c2222479cea83d
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SHA512
53b4c972c21a18551af1a2803855d73acf344e566b5bf85a88b985c00a4cd5e00cf1bfe0dcafe25fcfe2c0616dc0473a45cfd9918cedea0d4c87a988ed5bdb23
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SSDEEP
6144:lQsq9wlNPowTMHRSsfcUN1x/Vy21WW/R3mj8YR9em2fG9p:lQMl6wTMHR51WsR2j8YRwm2fyp
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/2868-1-0x0000000000F50000-0x0000000000FAE000-memory.dmp family_chaos behavioral1/files/0x000700000001211a-6.dat family_chaos behavioral1/memory/1728-8-0x0000000000020000-0x000000000007E000-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 2620 bcdedit.exe 2692 bcdedit.exe -
pid Process 2488 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\read_it.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 1728 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-1-5-21-1846800975-3917212583-2893086201-1000\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\Recorded TV\Sample Media\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\6GFIGH6G\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\GUJ7UW2N\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\Public\Recorded TV\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\Public\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\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\GY8QW6M2\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\L7XNHY48\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Y8O71085\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\Roaming\Microsoft\Windows\Libraries\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\Start Menu\Programs\Administrative 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\Public\Music\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\Public\Videos\Sample Videos\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\Local\Microsoft\Feeds Cache\3W44XPEP\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\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\Feeds Cache\GKATPXW1\desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\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\Start Menu\Programs\Accessories\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\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\Admin\Searches\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\Public\Documents\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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 F:\$RECYCLE.BIN\S-1-5-21-1846800975-3917212583-2893086201-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Admin\Favorites\Links\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\75GKCLJR\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\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\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\5550xvf1c.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 1752 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1668 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe 1728 svchost.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe 1728 svchost.exe 1728 svchost.exe 1728 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe Token: SeDebugPrivilege 1728 svchost.exe Token: SeBackupPrivilege 1672 vssvc.exe Token: SeRestorePrivilege 1672 vssvc.exe Token: SeAuditPrivilege 1672 vssvc.exe Token: SeIncreaseQuotaPrivilege 2808 WMIC.exe Token: SeSecurityPrivilege 2808 WMIC.exe Token: SeTakeOwnershipPrivilege 2808 WMIC.exe Token: SeLoadDriverPrivilege 2808 WMIC.exe Token: SeSystemProfilePrivilege 2808 WMIC.exe Token: SeSystemtimePrivilege 2808 WMIC.exe Token: SeProfSingleProcessPrivilege 2808 WMIC.exe Token: SeIncBasePriorityPrivilege 2808 WMIC.exe Token: SeCreatePagefilePrivilege 2808 WMIC.exe Token: SeBackupPrivilege 2808 WMIC.exe Token: SeRestorePrivilege 2808 WMIC.exe Token: SeShutdownPrivilege 2808 WMIC.exe Token: SeDebugPrivilege 2808 WMIC.exe Token: SeSystemEnvironmentPrivilege 2808 WMIC.exe Token: SeRemoteShutdownPrivilege 2808 WMIC.exe Token: SeUndockPrivilege 2808 WMIC.exe Token: SeManageVolumePrivilege 2808 WMIC.exe Token: 33 2808 WMIC.exe Token: 34 2808 WMIC.exe Token: 35 2808 WMIC.exe Token: SeIncreaseQuotaPrivilege 2808 WMIC.exe Token: SeSecurityPrivilege 2808 WMIC.exe Token: SeTakeOwnershipPrivilege 2808 WMIC.exe Token: SeLoadDriverPrivilege 2808 WMIC.exe Token: SeSystemProfilePrivilege 2808 WMIC.exe Token: SeSystemtimePrivilege 2808 WMIC.exe Token: SeProfSingleProcessPrivilege 2808 WMIC.exe Token: SeIncBasePriorityPrivilege 2808 WMIC.exe Token: SeCreatePagefilePrivilege 2808 WMIC.exe Token: SeBackupPrivilege 2808 WMIC.exe Token: SeRestorePrivilege 2808 WMIC.exe Token: SeShutdownPrivilege 2808 WMIC.exe Token: SeDebugPrivilege 2808 WMIC.exe Token: SeSystemEnvironmentPrivilege 2808 WMIC.exe Token: SeRemoteShutdownPrivilege 2808 WMIC.exe Token: SeUndockPrivilege 2808 WMIC.exe Token: SeManageVolumePrivilege 2808 WMIC.exe Token: 33 2808 WMIC.exe Token: 34 2808 WMIC.exe Token: 35 2808 WMIC.exe Token: SeBackupPrivilege 2928 wbengine.exe Token: SeRestorePrivilege 2928 wbengine.exe Token: SeSecurityPrivilege 2928 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2868 wrote to memory of 1728 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe 28 PID 2868 wrote to memory of 1728 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe 28 PID 2868 wrote to memory of 1728 2868 2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe 28 PID 1728 wrote to memory of 2052 1728 svchost.exe 29 PID 1728 wrote to memory of 2052 1728 svchost.exe 29 PID 1728 wrote to memory of 2052 1728 svchost.exe 29 PID 2052 wrote to memory of 1752 2052 cmd.exe 31 PID 2052 wrote to memory of 1752 2052 cmd.exe 31 PID 2052 wrote to memory of 1752 2052 cmd.exe 31 PID 2052 wrote to memory of 2808 2052 cmd.exe 34 PID 2052 wrote to memory of 2808 2052 cmd.exe 34 PID 2052 wrote to memory of 2808 2052 cmd.exe 34 PID 1728 wrote to memory of 2720 1728 svchost.exe 36 PID 1728 wrote to memory of 2720 1728 svchost.exe 36 PID 1728 wrote to memory of 2720 1728 svchost.exe 36 PID 2720 wrote to memory of 2620 2720 cmd.exe 38 PID 2720 wrote to memory of 2620 2720 cmd.exe 38 PID 2720 wrote to memory of 2620 2720 cmd.exe 38 PID 2720 wrote to memory of 2692 2720 cmd.exe 39 PID 2720 wrote to memory of 2692 2720 cmd.exe 39 PID 2720 wrote to memory of 2692 2720 cmd.exe 39 PID 1728 wrote to memory of 2540 1728 svchost.exe 40 PID 1728 wrote to memory of 2540 1728 svchost.exe 40 PID 1728 wrote to memory of 2540 1728 svchost.exe 40 PID 2540 wrote to memory of 2488 2540 cmd.exe 42 PID 2540 wrote to memory of 2488 2540 cmd.exe 42 PID 2540 wrote to memory of 2488 2540 cmd.exe 42 PID 1728 wrote to memory of 1668 1728 svchost.exe 48 PID 1728 wrote to memory of 1668 1728 svchost.exe 48 PID 1728 wrote to memory of 1668 1728 svchost.exe 48 -
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\2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-11-07_bcf9a3f92706b2cb338459dd52488472_wannacry.exe"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2868 -
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:1728 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2052 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1752
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2808
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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:2720 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2620
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2692
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2540 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2488
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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:1668
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1672
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2928
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2240
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:572
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
197B
MD570634f949389b56592495eb94140321e
SHA1987005519604566d268f399319b7f062967f4a24
SHA256cb5fb63c0ac4f248d0dc63d8ea65d9ae0988be7b769a1072b3ce11303a43099a
SHA512025d0b4fe43ce34939c1422df1bc9883b128696e653d4903b6a2028821a01003aa4cc00b922cfd3513b68415e57397a3cee1ca9bc0638095a32dccabfbb297d2
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Filesize
352KB
MD5bcf9a3f92706b2cb338459dd52488472
SHA15e31b8509abc813d474577c6785e961ced7cc697
SHA2561229e2bf183c624411a3ee4efb10a27a500593b36c9f2643d1c2222479cea83d
SHA51253b4c972c21a18551af1a2803855d73acf344e566b5bf85a88b985c00a4cd5e00cf1bfe0dcafe25fcfe2c0616dc0473a45cfd9918cedea0d4c87a988ed5bdb23
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0