Analysis
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max time kernel
143s -
max time network
16s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
04-08-2024 09:17
Static task
static1
Behavioral task
behavioral1
Sample
NexusLoader.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
NexusLoader.exe
Resource
win10v2004-20240802-en
General
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Target
NexusLoader.exe
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Size
224KB
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MD5
5c7fb0927db37372da25f270708103a2
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SHA1
120ed9279d85cbfa56e5b7779ffa7162074f7a29
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SHA256
be22645c61949ad6a077373a7d6cd85e3fae44315632f161adc4c99d5a8e6844
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SHA512
a15f97fad744ccf5f620e5aabb81f48507327b898a9aa4287051464019e0f89224c484e9691812e166471af9beaddcfc3deb2ba878658761f4800663beef7206
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SSDEEP
3072:Y059femWRwTs/dbelj0X8/j84pcRXPlU3Upt3or4H84lK8PtpLzLsR/EfcZ:+5RwTs/dSXj84mRXPemxdBlPvLzLeZ
Malware Config
Extracted
C:\Users\Admin\Documents\!Please Read Me!.txt
wannacry
15zGqZCTcys6eCjDkE3DypCjXi6QWRV6V1
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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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\~SD32D8.tmp NexusLoader.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\~SD32FB.tmp NexusLoader.exe -
Executes dropped EXE 4 IoCs
pid Process 2624 !WannaDecryptor!.exe 788 !WannaDecryptor!.exe 2924 !WannaDecryptor!.exe 2476 !WannaDecryptor!.exe -
Loads dropped DLL 9 IoCs
pid Process 2620 cscript.exe 2884 NexusLoader.exe 2884 NexusLoader.exe 2884 NexusLoader.exe 2884 NexusLoader.exe 2536 cmd.exe 2536 cmd.exe 2884 NexusLoader.exe 2884 NexusLoader.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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Microsoft Update Task Scheduler = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\NexusLoader.exe\" /r" NexusLoader.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" !WannaDecryptor!.exe Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\!WannaCryptor!.bmp" !WannaDecryptor!.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 15 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language vssadmin.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language !WannaDecryptor!.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language !WannaDecryptor!.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language taskkill.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cscript.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language !WannaDecryptor!.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WMIC.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language taskkill.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language taskkill.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language taskkill.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NexusLoader.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language !WannaDecryptor!.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2988 vssadmin.exe -
Kills process with taskkill 4 IoCs
pid Process 2132 taskkill.exe 264 taskkill.exe 1600 taskkill.exe 1684 taskkill.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2476 !WannaDecryptor!.exe -
Suspicious use of AdjustPrivilegeToken 47 IoCs
description pid Process Token: SeDebugPrivilege 264 taskkill.exe Token: SeDebugPrivilege 2132 taskkill.exe Token: SeDebugPrivilege 1684 taskkill.exe Token: SeDebugPrivilege 1600 taskkill.exe Token: SeBackupPrivilege 1564 vssvc.exe Token: SeRestorePrivilege 1564 vssvc.exe Token: SeAuditPrivilege 1564 vssvc.exe Token: SeIncreaseQuotaPrivilege 2972 WMIC.exe Token: SeSecurityPrivilege 2972 WMIC.exe Token: SeTakeOwnershipPrivilege 2972 WMIC.exe Token: SeLoadDriverPrivilege 2972 WMIC.exe Token: SeSystemProfilePrivilege 2972 WMIC.exe Token: SeSystemtimePrivilege 2972 WMIC.exe Token: SeProfSingleProcessPrivilege 2972 WMIC.exe Token: SeIncBasePriorityPrivilege 2972 WMIC.exe Token: SeCreatePagefilePrivilege 2972 WMIC.exe Token: SeBackupPrivilege 2972 WMIC.exe Token: SeRestorePrivilege 2972 WMIC.exe Token: SeShutdownPrivilege 2972 WMIC.exe Token: SeDebugPrivilege 2972 WMIC.exe Token: SeSystemEnvironmentPrivilege 2972 WMIC.exe Token: SeRemoteShutdownPrivilege 2972 WMIC.exe Token: SeUndockPrivilege 2972 WMIC.exe Token: SeManageVolumePrivilege 2972 WMIC.exe Token: 33 2972 WMIC.exe Token: 34 2972 WMIC.exe Token: 35 2972 WMIC.exe Token: SeIncreaseQuotaPrivilege 2972 WMIC.exe Token: SeSecurityPrivilege 2972 WMIC.exe Token: SeTakeOwnershipPrivilege 2972 WMIC.exe Token: SeLoadDriverPrivilege 2972 WMIC.exe Token: SeSystemProfilePrivilege 2972 WMIC.exe Token: SeSystemtimePrivilege 2972 WMIC.exe Token: SeProfSingleProcessPrivilege 2972 WMIC.exe Token: SeIncBasePriorityPrivilege 2972 WMIC.exe Token: SeCreatePagefilePrivilege 2972 WMIC.exe Token: SeBackupPrivilege 2972 WMIC.exe Token: SeRestorePrivilege 2972 WMIC.exe Token: SeShutdownPrivilege 2972 WMIC.exe Token: SeDebugPrivilege 2972 WMIC.exe Token: SeSystemEnvironmentPrivilege 2972 WMIC.exe Token: SeRemoteShutdownPrivilege 2972 WMIC.exe Token: SeUndockPrivilege 2972 WMIC.exe Token: SeManageVolumePrivilege 2972 WMIC.exe Token: 33 2972 WMIC.exe Token: 34 2972 WMIC.exe Token: 35 2972 WMIC.exe -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 2624 !WannaDecryptor!.exe 2624 !WannaDecryptor!.exe 788 !WannaDecryptor!.exe 788 !WannaDecryptor!.exe 2924 !WannaDecryptor!.exe 2924 !WannaDecryptor!.exe 2476 !WannaDecryptor!.exe 2476 !WannaDecryptor!.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 2884 wrote to memory of 2836 2884 NexusLoader.exe 29 PID 2884 wrote to memory of 2836 2884 NexusLoader.exe 29 PID 2884 wrote to memory of 2836 2884 NexusLoader.exe 29 PID 2884 wrote to memory of 2836 2884 NexusLoader.exe 29 PID 2836 wrote to memory of 2620 2836 cmd.exe 31 PID 2836 wrote to memory of 2620 2836 cmd.exe 31 PID 2836 wrote to memory of 2620 2836 cmd.exe 31 PID 2836 wrote to memory of 2620 2836 cmd.exe 31 PID 2884 wrote to memory of 2624 2884 NexusLoader.exe 32 PID 2884 wrote to memory of 2624 2884 NexusLoader.exe 32 PID 2884 wrote to memory of 2624 2884 NexusLoader.exe 32 PID 2884 wrote to memory of 2624 2884 NexusLoader.exe 32 PID 2884 wrote to memory of 2132 2884 NexusLoader.exe 34 PID 2884 wrote to memory of 2132 2884 NexusLoader.exe 34 PID 2884 wrote to memory of 2132 2884 NexusLoader.exe 34 PID 2884 wrote to memory of 2132 2884 NexusLoader.exe 34 PID 2884 wrote to memory of 264 2884 NexusLoader.exe 35 PID 2884 wrote to memory of 264 2884 NexusLoader.exe 35 PID 2884 wrote to memory of 264 2884 NexusLoader.exe 35 PID 2884 wrote to memory of 264 2884 NexusLoader.exe 35 PID 2884 wrote to memory of 1600 2884 NexusLoader.exe 37 PID 2884 wrote to memory of 1600 2884 NexusLoader.exe 37 PID 2884 wrote to memory of 1600 2884 NexusLoader.exe 37 PID 2884 wrote to memory of 1600 2884 NexusLoader.exe 37 PID 2884 wrote to memory of 1684 2884 NexusLoader.exe 39 PID 2884 wrote to memory of 1684 2884 NexusLoader.exe 39 PID 2884 wrote to memory of 1684 2884 NexusLoader.exe 39 PID 2884 wrote to memory of 1684 2884 NexusLoader.exe 39 PID 2884 wrote to memory of 788 2884 NexusLoader.exe 43 PID 2884 wrote to memory of 788 2884 NexusLoader.exe 43 PID 2884 wrote to memory of 788 2884 NexusLoader.exe 43 PID 2884 wrote to memory of 788 2884 NexusLoader.exe 43 PID 2884 wrote to memory of 2536 2884 NexusLoader.exe 44 PID 2884 wrote to memory of 2536 2884 NexusLoader.exe 44 PID 2884 wrote to memory of 2536 2884 NexusLoader.exe 44 PID 2884 wrote to memory of 2536 2884 NexusLoader.exe 44 PID 2536 wrote to memory of 2924 2536 cmd.exe 46 PID 2536 wrote to memory of 2924 2536 cmd.exe 46 PID 2536 wrote to memory of 2924 2536 cmd.exe 46 PID 2536 wrote to memory of 2924 2536 cmd.exe 46 PID 2884 wrote to memory of 2476 2884 NexusLoader.exe 47 PID 2884 wrote to memory of 2476 2884 NexusLoader.exe 47 PID 2884 wrote to memory of 2476 2884 NexusLoader.exe 47 PID 2884 wrote to memory of 2476 2884 NexusLoader.exe 47 PID 2924 wrote to memory of 2312 2924 !WannaDecryptor!.exe 48 PID 2924 wrote to memory of 2312 2924 !WannaDecryptor!.exe 48 PID 2924 wrote to memory of 2312 2924 !WannaDecryptor!.exe 48 PID 2924 wrote to memory of 2312 2924 !WannaDecryptor!.exe 48 PID 2312 wrote to memory of 2988 2312 cmd.exe 50 PID 2312 wrote to memory of 2988 2312 cmd.exe 50 PID 2312 wrote to memory of 2988 2312 cmd.exe 50 PID 2312 wrote to memory of 2988 2312 cmd.exe 50 PID 2312 wrote to memory of 2972 2312 cmd.exe 52 PID 2312 wrote to memory of 2972 2312 cmd.exe 52 PID 2312 wrote to memory of 2972 2312 cmd.exe 52 PID 2312 wrote to memory of 2972 2312 cmd.exe 52 -
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\NexusLoader.exe"C:\Users\Admin\AppData\Local\Temp\NexusLoader.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2884 -
C:\Windows\SysWOW64\cmd.execmd /c 191051722763099.bat2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2836 -
C:\Windows\SysWOW64\cscript.execscript //nologo c.vbs3⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
PID:2620
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C:\Users\Admin\AppData\Local\Temp\!WannaDecryptor!.exe!WannaDecryptor!.exe f2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2624
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C:\Windows\SysWOW64\taskkill.exetaskkill /f /im MSExchange*2⤵
- System Location Discovery: System Language Discovery
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2132
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C:\Windows\SysWOW64\taskkill.exetaskkill /f /im Microsoft.Exchange.*2⤵
- System Location Discovery: System Language Discovery
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:264
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C:\Windows\SysWOW64\taskkill.exetaskkill /f /im sqlserver.exe2⤵
- System Location Discovery: System Language Discovery
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1600
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C:\Windows\SysWOW64\taskkill.exetaskkill /f /im sqlwriter.exe2⤵
- System Location Discovery: System Language Discovery
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1684
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C:\Users\Admin\AppData\Local\Temp\!WannaDecryptor!.exe!WannaDecryptor!.exe c2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:788
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C:\Windows\SysWOW64\cmd.execmd.exe /c start /b !WannaDecryptor!.exe v2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536 -
C:\Users\Admin\AppData\Local\Temp\!WannaDecryptor!.exe!WannaDecryptor!.exe v3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2924 -
C:\Windows\SysWOW64\cmd.execmd.exe /c vssadmin delete shadows /all /quiet & wmic shadowcopy delete & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog -quiet4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2312 -
C:\Windows\SysWOW64\vssadmin.exevssadmin delete shadows /all /quiet5⤵
- System Location Discovery: System Language Discovery
- Interacts with shadow copies
PID:2988
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic shadowcopy delete5⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2972
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C:\Users\Admin\AppData\Local\Temp\!WannaDecryptor!.exe!WannaDecryptor!.exe2⤵
- Executes dropped EXE
- Sets desktop wallpaper using registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2476
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1564
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
2File Deletion
2Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
236KB
MD5cf1416074cd7791ab80a18f9e7e219d9
SHA1276d2ec82c518d887a8a3608e51c56fa28716ded
SHA25678e3f87f31688355c0f398317b2d87d803bd87ee3656c5a7c80f0561ec8606df
SHA5120bb0843a90edacaf1407e6a7273a9fbb896701635e4d9467392b7350ad25a1bec0c1ceef36737b4af5e5841936f4891436eded0533aa3d74c9a54efa42f024c5
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Filesize
925B
MD584d1ac15df78c41b5a81b76782a426b2
SHA141f89f332c0e878543e4ee8cabf9b3e0da8d8b47
SHA256588fe928756b0cdaf940680e472eb335bf502917e8533befccb92f8a73799dac
SHA512f08cb758d1918159a73245fd712809f5ef566f1867684f093608adef241b9b81a37b2d9aa5096426a7dae4458e8aa209e0d256d2b163b1f8af442bf962667adb
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Filesize
136B
MD5392796fd0eab6908a1f8598f1378a95c
SHA154f31b3b741a6c7ae4253d23f2a5680a3d91c9c3
SHA2569cf495b74101c57f08ae75e253f6fef20ced772b24b3f13fffc288f78a428138
SHA512baf16b0d8e526e48afaf379accd23c1fccebbf463674690a5fdff3d4854c3d845e58f68c7d8c682ddf0c531c458139699cfa1177d687d4df507d32afd97eff80
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Filesize
136B
MD5be10ce2b3453cee60186c32bced4371a
SHA1775f048959cb245789c202daa84b0ed8d80a7b95
SHA256fe6696e411b0353ccfa28999091df03cdc082e6675a9df90149e11657a169e99
SHA5120880c26f7e8b4818f62befced62fc7a21e92fc810473459eb6fae08c5eacd7891fad4e27dab2f2e302eaa9ddead65dc02fb6b6b58c6c10a8745b9cae852e2ba9
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Filesize
136B
MD58433a666593e0d678820a835e8864134
SHA1b0b042551cb61c0876c193c4cbea06743dc482a6
SHA256b1c27efed24819dbda9c216ca123995dff0e8f402bf388ba10b745b0484984e8
SHA51210b430c2ef50d94a551e719d7ffb371f6c1757c7583c76ed80ad8a607607ca7e70865c127da0abee483d03704f05912693b8eb3643b60dccd56532b88b2946d0
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Filesize
336B
MD53540e056349c6972905dc9706cd49418
SHA1492c20442d34d45a6d6790c720349b11ec591cde
SHA25673872a89440a2cba9d22bf4961c3d499ea2c72979c30c455f942374292fedadc
SHA512c949d147100aef59e382c03abf7b162ae62a4d43456eebd730fbedcf5f95f5e1a24f6e349690d52d75331878a6ee8f6b88a7162ee9cf2a49e142196b12d0133c
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Filesize
219B
MD55f6d40ca3c34b470113ed04d06a88ff4
SHA150629e7211ae43e32060686d6be17ebd492fd7aa
SHA2560fb5039a2fe7e90cdf3f22140d7f2103f94689b15609efe0edcc8430dd772fc1
SHA5124d4aa1abd2c9183202fd3f0a65b37f07ee0166ba6561f094c13c8ea59752c7bdd960e37c49583746d4464bc3b1dc0b63a1fe36a37ce7e5709cd76ed433befe35
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Filesize
628B
MD5f1da7091ab94bd41a574d6b7061aff1d
SHA16d66158a0cd28fca58c3a43bb23d062a343fa547
SHA2564dbad0965c1c6ab42371e9a8be22bf66490e283a43609acc4cb99fee16be988a
SHA512efdb523aaefae81ed9c31838bc35c951de48b462ff582c16600cf89bd318321aa454f08d14b7e41879fa1d483fcf399edd74687ae2d7777feb374fa5b07f247e
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Filesize
42KB
MD5980b08bac152aff3f9b0136b616affa5
SHA12a9c9601ea038f790cc29379c79407356a3d25a3
SHA256402046ada270528c9ac38bbfa0152836fe30fb8e12192354e53b8397421430d9
SHA512100cda1f795781042b012498afd783fd6ff03b0068dbd07b2c2e163cd95e6c6e00755ce16b02b017693c9febc149ed02df9df9b607e2b9cca4b07e5bd420f496
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Filesize
797B
MD5afa18cf4aa2660392111763fb93a8c3d
SHA1c219a3654a5f41ce535a09f2a188a464c3f5baf5
SHA256227082c719fd4394c1f2311a0877d8a302c5b092bcc49f853a5cf3d2945f42b0
SHA5124161f250d59b7d4d4a6c4f16639d66d21b2a9606de956d22ec00bedb006643fedbbb8e4cde9f6c0c977285918648314883ca91f3442d1125593bf2605f2d5c6b