Analysis
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max time kernel
91s -
max time network
93s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
14/08/2024, 20:29
Behavioral task
behavioral1
Sample
lb.exe
Resource
win7-20240704-en
windows7-x64
Behavioral task
behavioral2
Sample
lb.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
General
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Target
lb.exe
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Size
194KB
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MD5
6fd558cf3add096970e15d1e62ca1957
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SHA1
78e95fabcfe8ef7bb6419f8456deccc3d5fa4c23
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SHA256
41e187191625d749b89a11bc04fc0b2a3b9bd638035d05b39365c47ab36d1898
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SHA512
fac7efe9b76f9b6a917f8751f5be64ad8e067e5404fe05f3e9d7781ea3661a06c0baaac676a6023eb4a0b7f01bc2bb2d64d572f85aec8ad8de35cc7f106e1fdc
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SSDEEP
3072:n6glyuxE4GsUPnliByocWepMhJL4BFkTGX:n6gDBGpvEByocWeyhJL4UK
Malware Config
Signatures
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Renames multiple (578) 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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation 1307.tmp -
Deletes itself 1 IoCs
pid Process 3584 1307.tmp -
Executes dropped EXE 1 IoCs
pid Process 3584 1307.tmp -
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) 2 IoCs
description ioc Process File opened for modification C:\$Recycle.Bin\S-1-5-21-2718105630-359604950-2820636825-1000\desktop.ini lb.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2718105630-359604950-2820636825-1000\desktop.ini lb.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\00002.SPL splwow64.exe File created C:\Windows\system32\spool\PRINTERS\PPovanu6u93ilz1i036od7kx5w.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PP4rtt2463rj4a_qqbxg17ix94c.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPy7qj7c_3jmpm1au064xdx_vld.TMP printfilterpipelinesvc.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\AAtvmKv4L.bmp" lb.exe Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\AAtvmKv4L.bmp" lb.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
pid Process 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3584 1307.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 1307.tmp Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language lb.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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU ONENOTE.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS ONENOTE.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily ONENOTE.EXE -
Modifies Control Panel 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop lb.exe Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\WallpaperStyle = "10" lb.exe -
Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AAtvmKv4L\DefaultIcon lb.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AAtvmKv4L lb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AAtvmKv4L\DefaultIcon\ = "C:\\ProgramData\\AAtvmKv4L.ico" lb.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.AAtvmKv4L lb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.AAtvmKv4L\ = "AAtvmKv4L" lb.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe 3624 lb.exe -
Suspicious behavior: RenamesItself 26 IoCs
pid Process 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp 3584 1307.tmp -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeAssignPrimaryTokenPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeDebugPrivilege 3624 lb.exe Token: 36 3624 lb.exe Token: SeImpersonatePrivilege 3624 lb.exe Token: SeIncBasePriorityPrivilege 3624 lb.exe Token: SeIncreaseQuotaPrivilege 3624 lb.exe Token: 33 3624 lb.exe Token: SeManageVolumePrivilege 3624 lb.exe Token: SeProfSingleProcessPrivilege 3624 lb.exe Token: SeRestorePrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSystemProfilePrivilege 3624 lb.exe Token: SeTakeOwnershipPrivilege 3624 lb.exe Token: SeShutdownPrivilege 3624 lb.exe Token: SeDebugPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeBackupPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe Token: SeSecurityPrivilege 3624 lb.exe -
Suspicious use of SetWindowsHookEx 13 IoCs
pid Process 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE 3476 ONENOTE.EXE -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 3624 wrote to memory of 3580 3624 lb.exe 93 PID 3624 wrote to memory of 3580 3624 lb.exe 93 PID 2436 wrote to memory of 3476 2436 printfilterpipelinesvc.exe 98 PID 2436 wrote to memory of 3476 2436 printfilterpipelinesvc.exe 98 PID 3624 wrote to memory of 3584 3624 lb.exe 99 PID 3624 wrote to memory of 3584 3624 lb.exe 99 PID 3624 wrote to memory of 3584 3624 lb.exe 99 PID 3624 wrote to memory of 3584 3624 lb.exe 99 PID 3584 wrote to memory of 4004 3584 1307.tmp 100 PID 3584 wrote to memory of 4004 3584 1307.tmp 100 PID 3584 wrote to memory of 4004 3584 1307.tmp 100
Processes
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C:\Users\Admin\AppData\Local\Temp\lb.exe"C:\Users\Admin\AppData\Local\Temp\lb.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:3624 -
C:\Windows\splwow64.exeC:\Windows\splwow64.exe 122882⤵
- Drops file in System32 directory
PID:3580
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C:\ProgramData\1307.tmp"C:\ProgramData\1307.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:3584 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\1307.tmp >> NUL3⤵
- System Location Discovery: System Language Discovery
PID:4004
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc1⤵PID:1072
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C:\Windows\system32\printfilterpipelinesvc.exeC:\Windows\system32\printfilterpipelinesvc.exe -Embedding1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2436 -
C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE/insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{8D779802-5F45-4BB7-8396-D179EDAD491A}.xps" 1336814101403400002⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
PID:3476
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129B
MD55e213b8cb6337a9d57ca7e809b5d19cd
SHA136c8fa5c84a3a42b9fe04202c814d8e0a229ff6d
SHA256157e925aeab32b6c7719fc7ca463ce11e4aff8ef9e36f1d82a23b33f664816e2
SHA5128f46d90bb81d1003d872012b6c4cc5319fb6ae2c4295724c6f60a3d1bd889b63f166fb94ba461649864975e0837bc1aa354e80f17ef18b745b94e0d7f1106794
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Filesize
434B
MD5b4709a56b9d7f431da172316cda720be
SHA1d2132f7129a7003ec4c0392f0f08cd24ea353da6
SHA256192d1e6078570865531e8a4c9840a483c4a2ac35fe468107284991f6da813191
SHA512e390d51e95db5e56c666a2895dc87dab41d97e7ce3c0df1f2466abf14a651167232521ab5f52746d16bab0ef14e6c0ee9dcfe29894604d695b0d064909378227
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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Filesize
194KB
MD524175323676e9d76f1fe4f571ed49193
SHA126f6fdf437acf5b913a3abc01e6d4b4dcb7a5a64
SHA256bbed68996c326adb902870239681bd427a2736535c4144dbf59f4af429a231cd
SHA51245df784bc8e5be9eddb70236ab79c359e7517a79073f434eab63eb07bbdfccc9bdd420c2d226bb8bedcfbc10f620315b8f0099032ed98c3320fa26bae8629e24
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Filesize
4KB
MD5caa2803e18392a436f88c01bbd85d0ca
SHA14c176699ffcf8e671f20c25c9141bb1638c95944
SHA25613443b7a6b38ccf402ba4ff963c033d10e8f1951d916c95f9ed724defd833f71
SHA512cbb172c5b7c1259345ecc24fd96118b528dee7e15ce36fa3a2d6fdb629731da34177d405b638d123098652a3369c4f13aeee5c9521d9da7f901496f604d709e7
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Filesize
129B
MD5ebd7e0e124f3e30dbe09cbcdb892d2c9
SHA1dcdf8737d89ac070f177ebe02c143a1a1f9da6fa
SHA2561e7845b4e85247a4380cc34c45e4996d3c6976bc22590434a90b43834eba7b29
SHA51254b8f1db711c1083f8ab73132c97870584ae66b9a0f9f329986deb7d88ef5fa6a0a5bfd452fd9005864aadfa109af2bc5051ac6c9723671989fffa95b62a5764