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Analysis
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max time kernel
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max time network
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platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
14/04/2024, 08:26
Behavioral task
behavioral1
Sample
2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe
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Size
23KB
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MD5
042af9c511552255aed26954d500543c
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SHA1
e478b331aec1166f16a714e2a4320fcb04d54b16
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SHA256
b69bb28aa423914139a3edcf9fdb617f3105d971e628c4cd82bbd62b9fc32b85
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SHA512
5729179cce14e135b9e9d79d1acf4e518f2eadff604e5094e9f1eaf9e8c2ef9a3ada18905c55143fe2bbeaf020f3cff3b7e7e9b0845475353fff286a0cefa664
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SSDEEP
384:R3Mg/bqo2i5rMfpz0qjuwzUrJXmr91C221gYei:Tqo2Ir8pzRjKd2r9t2xei
Malware Config
Extracted
C:\Users\Admin\Documents\READ_IT.txt
https://ibb.co/RHs43WH
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/2420-0-0x0000000000A80000-0x0000000000A8C000-memory.dmp family_chaos behavioral1/memory/3036-7-0x00000000003B0000-0x00000000003BC000-memory.dmp family_chaos behavioral1/files/0x000b000000012248-6.dat family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Detects command variations typically used by ransomware 3 IoCs
resource yara_rule behavioral1/memory/2420-0-0x0000000000A80000-0x0000000000A8C000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/3036-7-0x00000000003B0000-0x00000000003BC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/files/0x000b000000012248-6.dat INDICATOR_SUSPICIOUS_GENRansomware -
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 2644 bcdedit.exe 2780 bcdedit.exe -
pid Process 1560 wbadmin.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_IT.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 3036 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
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\Documents\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\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\Accessories\Accessibility\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\AppData\Roaming\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\Favorites\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\SendTo\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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 F:\$RECYCLE.BIN\S-1-5-21-2297530677-1229052932-2803917579-1000\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 556 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 700 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3036 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2420 2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe 2420 2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe 3036 svchost.exe 3036 svchost.exe 3036 svchost.exe 3036 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2420 2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 3036 svchost.exe Token: SeBackupPrivilege 1668 vssvc.exe Token: SeRestorePrivilege 1668 vssvc.exe Token: SeAuditPrivilege 1668 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 1772 wbengine.exe Token: SeRestorePrivilege 1772 wbengine.exe Token: SeSecurityPrivilege 1772 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2420 wrote to memory of 3036 2420 2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe 28 PID 2420 wrote to memory of 3036 2420 2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe 28 PID 2420 wrote to memory of 3036 2420 2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe 28 PID 3036 wrote to memory of 1628 3036 svchost.exe 30 PID 3036 wrote to memory of 1628 3036 svchost.exe 30 PID 3036 wrote to memory of 1628 3036 svchost.exe 30 PID 1628 wrote to memory of 556 1628 cmd.exe 32 PID 1628 wrote to memory of 556 1628 cmd.exe 32 PID 1628 wrote to memory of 556 1628 cmd.exe 32 PID 1628 wrote to memory of 304 1628 cmd.exe 35 PID 1628 wrote to memory of 304 1628 cmd.exe 35 PID 1628 wrote to memory of 304 1628 cmd.exe 35 PID 3036 wrote to memory of 2820 3036 svchost.exe 37 PID 3036 wrote to memory of 2820 3036 svchost.exe 37 PID 3036 wrote to memory of 2820 3036 svchost.exe 37 PID 2820 wrote to memory of 2644 2820 cmd.exe 39 PID 2820 wrote to memory of 2644 2820 cmd.exe 39 PID 2820 wrote to memory of 2644 2820 cmd.exe 39 PID 2820 wrote to memory of 2780 2820 cmd.exe 40 PID 2820 wrote to memory of 2780 2820 cmd.exe 40 PID 2820 wrote to memory of 2780 2820 cmd.exe 40 PID 3036 wrote to memory of 1860 3036 svchost.exe 41 PID 3036 wrote to memory of 1860 3036 svchost.exe 41 PID 3036 wrote to memory of 1860 3036 svchost.exe 41 PID 1860 wrote to memory of 1560 1860 cmd.exe 43 PID 1860 wrote to memory of 1560 1860 cmd.exe 43 PID 1860 wrote to memory of 1560 1860 cmd.exe 43 PID 3036 wrote to memory of 700 3036 svchost.exe 47 PID 3036 wrote to memory of 700 3036 svchost.exe 47 PID 3036 wrote to memory of 700 3036 svchost.exe 47 -
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\2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-14_042af9c511552255aed26954d500543c_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2420 -
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:3036 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1628 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:556
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:304
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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:2820 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2644
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2780
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1860 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1560
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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:700
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1668
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1772
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1228
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2912
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
23KB
MD5042af9c511552255aed26954d500543c
SHA1e478b331aec1166f16a714e2a4320fcb04d54b16
SHA256b69bb28aa423914139a3edcf9fdb617f3105d971e628c4cd82bbd62b9fc32b85
SHA5125729179cce14e135b9e9d79d1acf4e518f2eadff604e5094e9f1eaf9e8c2ef9a3ada18905c55143fe2bbeaf020f3cff3b7e7e9b0845475353fff286a0cefa664
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Filesize
714B
MD5bab79cb4fc18b75555a407cfbbad1cfb
SHA1884f8d416258fb32d8b54520df694a8b97e38baa
SHA2564922845e5199862745ea771d9905a8ee45592391539eb7663e352d21ca7fc5bd
SHA5122821935fd9a80d3253ec88b7f63ecedc1ae39c54ec081fa2e5ca673ad35ee2316336a995d9fb9dc52c5a07ee0afec98c9c04ee705c3cba7e73298d24f1e81cd9