Analysis
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max time kernel
94s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
25-12-2024 16:52
Behavioral task
behavioral1
Sample
LB3.exe
Resource
win7-20241023-en
Behavioral task
behavioral2
Sample
LB3.exe
Resource
win10v2004-20241007-en
General
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Target
LB3.exe
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Size
147KB
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MD5
67008d6538e43ec4ef57359f7ca4f15f
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SHA1
65078b6e640146bde300af0a6d70b91f45244343
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SHA256
cb43fff6739186bdf2af5d4f34624c020196616cdae86fb755bf3d250bbe9b12
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SHA512
9a9e281dcf6a783cb69f6ab9703af716dd304883ad1a92a17bf4498745b563b2560e4624d839cc7577776d31e22f596d821a183c4c4ec350d7fa7a8f0e44db54
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SSDEEP
3072:V6glyuxE4GsUPnliByocWepTN5GqoLVB5FHONF:V6gDBGpvEByocWeX/oZB7u/
Malware Config
Extracted
C:\IoBMyuygl.README.txt
https://tox.chat/download.html
Signatures
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Renames multiple (646) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation EA22.tmp -
Deletes itself 1 IoCs
pid Process 2800 EA22.tmp -
Executes dropped EXE 1 IoCs
pid Process 2800 EA22.tmp -
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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Drops desktop.ini file(s) 2 IoCs
description ioc Process File opened for modification C:\$Recycle.Bin\S-1-5-21-940901362-3608833189-1915618603-1000\desktop.ini LB3.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-940901362-3608833189-1915618603-1000\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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Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\system32\spool\PRINTERS\PPwy1l0io54hinlhkmb1as24x6b.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPr3tm17l5o00g5xqoqasmus_2.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPglfb094g26fjrff0kr2vl2zad.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\00002.SPL splwow64.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\IoBMyuygl.bmp" LB3.exe Set value (str) \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\IoBMyuygl.bmp" LB3.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
pid Process 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2800 EA22.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 3 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 EA22.tmp Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language LB3.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 Key created \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\Desktop LB3.exe Set value (str) \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\Desktop\WallpaperStyle = "10" LB3.exe -
Modifies registry class 7 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.IoBMyuygl LB3.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.IoBMyuygl\ = "IoBMyuygl" LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IoBMyuygl\DefaultIcon LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IoBMyuygl LB3.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IoBMyuygl\DefaultIcon\ = "C:\\ProgramData\\IoBMyuygl.ico" LB3.exe Key created \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings OpenWith.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1372 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 1284 ONENOTE.EXE 1284 ONENOTE.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe 2744 LB3.exe -
Suspicious behavior: RenamesItself 26 IoCs
pid Process 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp 2800 EA22.tmp -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeAssignPrimaryTokenPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeDebugPrivilege 2744 LB3.exe Token: 36 2744 LB3.exe Token: SeImpersonatePrivilege 2744 LB3.exe Token: SeIncBasePriorityPrivilege 2744 LB3.exe Token: SeIncreaseQuotaPrivilege 2744 LB3.exe Token: 33 2744 LB3.exe Token: SeManageVolumePrivilege 2744 LB3.exe Token: SeProfSingleProcessPrivilege 2744 LB3.exe Token: SeRestorePrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSystemProfilePrivilege 2744 LB3.exe Token: SeTakeOwnershipPrivilege 2744 LB3.exe Token: SeShutdownPrivilege 2744 LB3.exe Token: SeDebugPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeBackupPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe Token: SeSecurityPrivilege 2744 LB3.exe -
Suspicious use of SetWindowsHookEx 16 IoCs
pid Process 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 1284 ONENOTE.EXE 436 OpenWith.exe 4684 OpenWith.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 2744 wrote to memory of 536 2744 LB3.exe 87 PID 2744 wrote to memory of 536 2744 LB3.exe 87 PID 2184 wrote to memory of 1284 2184 printfilterpipelinesvc.exe 99 PID 2184 wrote to memory of 1284 2184 printfilterpipelinesvc.exe 99 PID 2744 wrote to memory of 2800 2744 LB3.exe 100 PID 2744 wrote to memory of 2800 2744 LB3.exe 100 PID 2744 wrote to memory of 2800 2744 LB3.exe 100 PID 2744 wrote to memory of 2800 2744 LB3.exe 100 PID 2800 wrote to memory of 2472 2800 EA22.tmp 102 PID 2800 wrote to memory of 2472 2800 EA22.tmp 102 PID 2800 wrote to memory of 2472 2800 EA22.tmp 102
Processes
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C:\Users\Admin\AppData\Local\Temp\LB3.exe"C:\Users\Admin\AppData\Local\Temp\LB3.exe"1⤵
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2744 -
C:\Windows\splwow64.exeC:\Windows\splwow64.exe 122882⤵
- Drops file in System32 directory
PID:536
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C:\ProgramData\EA22.tmp"C:\ProgramData\EA22.tmp"2⤵
- Checks computer location settings
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2800 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\EA22.tmp >> NUL3⤵
- System Location Discovery: System Language Discovery
PID:2472
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc1⤵PID:4016
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\IoBMyuygl.README.txt1⤵
- Opens file in notepad (likely ransom note)
PID:1372
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C:\Windows\system32\printfilterpipelinesvc.exeC:\Windows\system32\printfilterpipelinesvc.exe -Embedding1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2184 -
C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE/insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{97DC4684-4F4F-4F61-B705-2243DEC49F1F}.xps" 1337961915464100002⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1284
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C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:436
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C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4684
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129B
MD58a91983f28b0987413e55d50f12e2be6
SHA1ccba56b8de719c641efbd5a2415962f92fbf5667
SHA25613ba52b63efbf8f880bc82c4f522ff88178819d3ad17ecfd435b974ed4bde16b
SHA5122e1d806ac7949a093e87c3e3d95405fe318b61595d0129395deac0a49bd346c90d33fb7172f142cba7e81f32744bdef738b1af4ab678973179a6e13d7e1f9575
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Filesize
1KB
MD50fc102c3422c21c1aadfaa1a656dc970
SHA149cc540c7a5eaa4f12cacdb21e788335d535ccc0
SHA256fe49a063ebe0b4154321062c1110876bab03710ab367d8a5e3dee6e75fc79029
SHA5128cf822ec2d69b4f4bfdc3303b142ff21315d6e5483a98efa834d039f68a6f57e249d374d3c127a65f524123464532afa5700b4dd4808236b082f7a420a260ab0
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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Filesize
147KB
MD59fafbe51a6b91ec47a137a6272b7e11e
SHA133261d8c2eece0c5bea3e7077c85e08bac7eda50
SHA256e2fbaca85e2e549d3ec3d724a15a561385532ef64e12065c6373503597ea3e67
SHA512ad01da863e05b74fd9adbb11cb34ff8702f7d5172a6449f5519d5a06b5abd2a8df80dc6322243fa1e2579af2107569ac07dcce805c1adc5ad732bb8b8bee6578
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Filesize
4KB
MD581ed19227983dee7a6e26cd04ca7fd71
SHA13042614fc5a8323a57f29c8a7197dd4d957e078e
SHA25679f0d9b49645ba2ffb199d4ed06aa2c0b02de78c89944b7c4b2bc5da36937ddc
SHA5120cb026031a6634d9811434146c8ea19e887a3956c49233e5d786d8b00fb8fc710650a32d67c96d2b08e1a952e7f1727eda9fbae4772abb40fc49907fbb1946fa
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Filesize
129B
MD564c06e9533a241940b3adb8f1af9c53e
SHA1c2e370367ba3c602d3331f974d9d19c0e83dc432
SHA2566e225f6d9d7503a21542840e7e35f8ea860379b78f4ec464c7332f5582db762f
SHA51208b022abd639cd707dde3342560a29153c59f907104e2e4efc200dffe99f2b70ea0565e74db24efc9a3ffc2eaf7c4b72bd79c02c027d947d428a1c79c6aadbae