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Analysis
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max time kernel
120s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
20/08/2024, 09:17
Static task
static1
Behavioral task
behavioral1
Sample
ctrsys.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
ctrsys.exe
Resource
win10v2004-20240802-en
General
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Target
ctrsys.exe
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Size
183KB
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MD5
3870e4591ce517d956771e23c361582d
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SHA1
28d09d35d3e5a8490ef4a4ebaa36262fa411afba
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SHA256
2c85d7c4dd069fff494edd19387d56e54a52f6ef1b557f3d775f999410eb5a4d
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SHA512
61dc0f9ca1a81170ef6aa4e514432079ebf12509eb615a191dae9f0e801d95748adf1cfd7d03dc5035dddd809458b0d42453b3fd51ca29cca3b8776a430de2d1
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SSDEEP
3072:8FuxfutjURbpYkH+wWtaiEGlIQZboLRG9ua/aHyvXgQd2md:8FEgjUXr7NGlVbAh
Malware Config
Extracted
C:\MNYHU2Jh1.README.txt
https://coinatmradar.com
https://www.moonpay.com/buy
https://tox.chat/download.html
Signatures
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Lockbit
Ransomware family with multiple variants released since late 2019.
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Rule to detect Lockbit 3.0 ransomware Windows payload 1 IoCs
resource yara_rule behavioral2/files/0x000a000000023413-16.dat family_lockbit -
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
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Renames multiple (615) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Downloads MZ/PE file
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation ctrsys.exe Key value queried \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation 4EB8.tmp -
Executes dropped EXE 2 IoCs
pid Process 4456 LB3.exe 2192 4EB8.tmp -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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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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Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 ctrsys.exe Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 ctrsys.exe Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 ctrsys.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MyOtApp = "C:\\Users\\Admin\\AppData\\Roaming\\JavaUpdate\\JavaUpdate.exe" ctrsys.exe -
Drops desktop.ini file(s) 2 IoCs
description ioc Process File opened for modification C:\$Recycle.Bin\S-1-5-21-786284298-625481688-3210388970-1000\desktop.ini LB3.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-786284298-625481688-3210388970-1000\desktop.ini LB3.exe -
Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 13 checkip.dyndns.org -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\system32\spool\PRINTERS\00002.SPL splwow64.exe File created C:\Windows\system32\spool\PRINTERS\PPg40ti460wkkcse_yc31ad9qqc.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPy4xk8c4hh6nol1xc89q6ynt6d.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPd1cpt5961wi112mtau_eqtauc.TMP printfilterpipelinesvc.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\MNYHU2Jh1.bmp" LB3.exe Set value (str) \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\MNYHU2Jh1.bmp" LB3.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 2192 4EB8.tmp -
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 4 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 ctrsys.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language LB3.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4EB8.tmp Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 ONENOTE.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz ONENOTE.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString ONENOTE.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS ONENOTE.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily ONENOTE.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU ONENOTE.EXE -
Modifies Control Panel 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\Desktop\WallpaperStyle = "10" LB3.exe Key created \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\Desktop LB3.exe -
Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\MNYHU2Jh1\DefaultIcon LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\MNYHU2Jh1 LB3.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\MNYHU2Jh1\DefaultIcon\ = "C:\\ProgramData\\MNYHU2Jh1.ico" LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.MNYHU2Jh1 LB3.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.MNYHU2Jh1\ = "MNYHU2Jh1" LB3.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3304 ctrsys.exe 3304 ctrsys.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe 4456 LB3.exe -
Suspicious behavior: RenamesItself 2 IoCs
pid Process 3304 ctrsys.exe 4456 LB3.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 3304 ctrsys.exe Token: SeAssignPrimaryTokenPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeDebugPrivilege 4456 LB3.exe Token: 36 4456 LB3.exe Token: SeImpersonatePrivilege 4456 LB3.exe Token: SeIncBasePriorityPrivilege 4456 LB3.exe Token: SeIncreaseQuotaPrivilege 4456 LB3.exe Token: 33 4456 LB3.exe Token: SeManageVolumePrivilege 4456 LB3.exe Token: SeProfSingleProcessPrivilege 4456 LB3.exe Token: SeRestorePrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSystemProfilePrivilege 4456 LB3.exe Token: SeTakeOwnershipPrivilege 4456 LB3.exe Token: SeShutdownPrivilege 4456 LB3.exe Token: SeDebugPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeBackupPrivilege 4456 LB3.exe Token: SeSecurityPrivilege 4456 LB3.exe -
Suspicious use of SetWindowsHookEx 13 IoCs
pid Process 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE 5916 ONENOTE.EXE -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 3304 wrote to memory of 4456 3304 ctrsys.exe 89 PID 3304 wrote to memory of 4456 3304 ctrsys.exe 89 PID 3304 wrote to memory of 4456 3304 ctrsys.exe 89 PID 4456 wrote to memory of 5816 4456 LB3.exe 96 PID 4456 wrote to memory of 5816 4456 LB3.exe 96 PID 3252 wrote to memory of 5916 3252 printfilterpipelinesvc.exe 101 PID 3252 wrote to memory of 5916 3252 printfilterpipelinesvc.exe 101 PID 4456 wrote to memory of 2192 4456 LB3.exe 102 PID 4456 wrote to memory of 2192 4456 LB3.exe 102 PID 4456 wrote to memory of 2192 4456 LB3.exe 102 PID 4456 wrote to memory of 2192 4456 LB3.exe 102 PID 2192 wrote to memory of 4296 2192 4EB8.tmp 103 PID 2192 wrote to memory of 4296 2192 4EB8.tmp 103 PID 2192 wrote to memory of 4296 2192 4EB8.tmp 103 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 ctrsys.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 ctrsys.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ctrsys.exe"C:\Users\Admin\AppData\Local\Temp\ctrsys.exe"1⤵
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:3304 -
C:\Users\Admin\AppData\Local\Temp\LB3.exe"C:\Users\Admin\AppData\Local\Temp\LB3.exe"2⤵
- Executes dropped EXE
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456 -
C:\Windows\splwow64.exeC:\Windows\splwow64.exe 122883⤵
- Drops file in System32 directory
PID:5816
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C:\ProgramData\4EB8.tmp"C:\ProgramData\4EB8.tmp"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2192 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\4EB8.tmp >> NUL4⤵
- System Location Discovery: System Language Discovery
PID:4296
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc1⤵PID:5872
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C:\Windows\system32\printfilterpipelinesvc.exeC:\Windows\system32\printfilterpipelinesvc.exe -Embedding1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3252 -
C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE/insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{0C257122-E255-4FEC-A365-2C34BB07F894}.xps" 1336861906749700002⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
PID:5916
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
5Credentials In Files
4Credentials in Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
129B
MD57431a3fe37b7bbe9332564f5cd15c451
SHA1cde5fed4bd4f05ceef013cc7eca2353ac2bcf985
SHA256c6993bd475f331d976a9aeb7f52b9c5e37123ce92f41ce3e4db9ebce58b87183
SHA5123abb01a51361f5c879dceaad5412d0c8063a2f44cb567f12226239914495e331fc370064b7220b10663d392004c759c25ebb0bbee89bf677f3d34b7ca02edd28
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Filesize
1KB
MD570f8acf921f004784b21982bdfb5fb9b
SHA1a5fe82b54b1da9425c680e04ac9a0ea88ff4a225
SHA256497cdf0c2b83ff7b52d2b0e06985a0dd70746291f1c7fef1dd191e286a8f71f4
SHA51204c76d374ac49c6c6d72fd00c0bafe0bb50ab98f8e2e954f32c575720df623d1e1103954475e9a36a79de7820627ef5170d00ac1d768038e50ad1e4e80313084
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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Filesize
147KB
MD5dd244f49d5767a7bad51552402a938a0
SHA1aa5a72703eecc0fd8640868901570707722ba9c6
SHA25697795230fb219addf55847ee28eecba41cd794e7a0a8a0d50a20308c611fde74
SHA5128a0c24c49b3a02abd4d519764090d8c45b6ec1fdc2fc58154b0f10d3d83d23259b700a70119859747db6d146da92da71d8af259d6241b13f51514e5965332e84
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Filesize
147KB
MD55820e728cfad98d8673d29448c58c7d5
SHA1cfe71685fd09fd14d2d2faa8618b2559438a8b1e
SHA2565ccc9cb2e75c85b87f7244cca81c1acf6dfffe8f35a8c4d0ee00795872a9c9e7
SHA51228ce7d774bd528a83e18fadf74e2826ae99031909e0907c83278604ba72a299942436721443ead9820a7e6bbc1f07c2e325886d316ed529fd12946c20e6cb9d4
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Filesize
4KB
MD589d3c32528150a085140a2e940ede7d9
SHA1df817ee2c3ed2dc1d190d1a9e55a88c3fdf07549
SHA2569e790fe8a5f61a65af636bdbc57f9e94e0e7ca0ce23eb364dfaaef6c2f30ceea
SHA51263a30b714457d6399dd023ab873c81e2abce60edaa2345a37eec6b48556276d509d7938e13e97c6893312b40e3d41db5f86874a4a307d16bf787fe82a67ffe63
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Filesize
129B
MD561cf1c2d636a284cd4534b213e424f45
SHA1e72b16d547b3ab5b731fa959ba7e410e246863d6
SHA2565df05d07067878a4e6a60bdc2fe7055e6372da0dbfa74fee4f2b225289b34525
SHA512b927b1a20409e0457ae272005e430e5d353c40a6d6adb928a730f72ba88aaae8a865304e9fdfda7b2d3893a2b5ac470c4c9c2a522b2e846a21f449e9116a03e7