Resubmissions
30/04/2024, 19:54
240430-ymx4waeg8z1030/04/2024, 19:45
240430-yglhwseg2x1030/04/2024, 19:30
240430-x8a1ssee5v1030/04/2024, 15:30
240430-sxxcfaaa4110Analysis
- max time kernel
196s - max time network
145s - platform
windows10-2004_x64 - resource
win10v2004-20240419-en - resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system - submitted
30/04/2024, 15:30
Behavioral task
behavioral1
Sample
lb.exe
Resource
win7-20240221-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
lb.exe
Resource
win10v2004-20240419-en
windows10-2004-x64
20 signatures
150 seconds
Behavioral task
behavioral3
Sample
lbb.exe
Resource
win7-20240215-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral4
Sample
lbb.exe
Resource
win10v2004-20240419-en
windows10-2004-x64
20 signatures
150 seconds
General
- Target lb.exe
- Size 194KB
- Sample240430-sxxcfaaa41
- SHA256 41e187191625d749b89a11bc04fc0b2a3b9bd638035d05b39365c47ab36d1898
- MD5 6fd558cf3add096970e15d1e62ca1957
- SHA1 78e95fabcfe8ef7bb6419f8456deccc3d5fa4c23
- SHA512 fac7efe9b76f9b6a917f8751f5be64ad8e067e5404fe05f3e9d7781ea3661a06c0baaac676a6023eb4a0b7f01bc2bb2d64d572f85aec8ad8de35cc7f106e1fdc
- SSDEEP 3072:n6glyuxE4GsUPnliByocWepMhJL4BFkTGX:n6gDBGpvEByocWeyhJL4UK
- MD5 SHA1 SHA512 SSDEEP
Score
9/10
Malware Config
Signatures
- Renames multiple (612) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- 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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation 6B3E.tmp - Deletes itself 1 IoCs
pid Process 548 6B3E.tmp - Executes dropped EXE 1 IoCs
pid Process 548 6B3E.tmp - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Drops desktop.ini file(s) 2 IoCs
description ioc Process File opened for modification C:\$Recycle.Bin\S-1-5-21-2860750803-256193626-1801997576-1000\desktop.ini lb.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2860750803-256193626-1801997576-1000\desktop.ini lb.exe - 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\PPvrpha7b3053axhanmgpwyicfe.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPccj75ok07_2nd4kyu4opctpnb.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPzo4yk5cacolzeg69ko_1ni6h.TMP printfilterpipelinesvc.exe - Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\AAtvmKv4L.bmp" lb.exe Set value (str) \REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\AAtvmKv4L.bmp" lb.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
pid Process 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 548 6B3E.tmp - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\Desktop lb.exe Set value (str) \REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\Desktop\WallpaperStyle = "10" lb.exe - Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.AAtvmKv4L lb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.AAtvmKv4L\ = "AAtvmKv4L" lb.exe 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 - Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 4552 ONENOTE.EXE 4552 ONENOTE.EXE - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe 2156 lb.exe - Suspicious behavior: RenamesItself 26 IoCs
pid Process 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp 548 6B3E.tmp - Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeAssignPrimaryTokenPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeDebugPrivilege 2156 lb.exe Token: 36 2156 lb.exe Token: SeImpersonatePrivilege 2156 lb.exe Token: SeIncBasePriorityPrivilege 2156 lb.exe Token: SeIncreaseQuotaPrivilege 2156 lb.exe Token: 33 2156 lb.exe Token: SeManageVolumePrivilege 2156 lb.exe Token: SeProfSingleProcessPrivilege 2156 lb.exe Token: SeRestorePrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSystemProfilePrivilege 2156 lb.exe Token: SeTakeOwnershipPrivilege 2156 lb.exe Token: SeShutdownPrivilege 2156 lb.exe Token: SeDebugPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeBackupPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe Token: SeSecurityPrivilege 2156 lb.exe - Suspicious use of SetWindowsHookEx 16 IoCs
pid Process 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE 4552 ONENOTE.EXE - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 2156 wrote to memory of 5012 2156 lb.exe 88 PID 2156 wrote to memory of 5012 2156 lb.exe 88 PID 4956 wrote to memory of 4552 4956 printfilterpipelinesvc.exe 91 PID 4956 wrote to memory of 4552 4956 printfilterpipelinesvc.exe 91 PID 2156 wrote to memory of 548 2156 lb.exe 92 PID 2156 wrote to memory of 548 2156 lb.exe 92 PID 2156 wrote to memory of 548 2156 lb.exe 92 PID 2156 wrote to memory of 548 2156 lb.exe 92 PID 548 wrote to memory of 3552 548 6B3E.tmp 93 PID 548 wrote to memory of 3552 548 6B3E.tmp 93 PID 548 wrote to memory of 3552 548 6B3E.tmp 93
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
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2156 -
C:\Windows\splwow64.exeC:\Windows\splwow64.exe 122882⤵
- Drops file in System32 directory
PID:5012
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C:\ProgramData\6B3E.tmp"C:\ProgramData\6B3E.tmp"2⤵
- Checks computer location settings
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:548 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\6B3E.tmp >> NUL3⤵PID:3552
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc1⤵PID:4408
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C:\Windows\system32\printfilterpipelinesvc.exeC:\Windows\system32\printfilterpipelinesvc.exe -Embedding1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4956 -
C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE/insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{5A387DC5-AB87-4E67-958B-D7FD4788D844}.xps" 1335896466555400002⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4552
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\$Recycle.Bin\S-1-5-21-2860750803-256193626-1801997576-1000\WWWWWWWWWWW
- Size 129B
- SHA256 c7c7a94bbc5e1dfdfead84352edf8b1930fcf3bf20190bb91d36ced49678d741
- MD5 81f247cf3984e732d085aad70dcdb018
- SHA1 e5d12118472fe4d14c85ae9207c44108f5c43929
- SHA512 2cc645c519ff561b4a61e7a6db210dfd076f78c9e8d224c77d61a0d0c630ce00c4fdbd3c9e6dadc248b4516b495a41a56a6c92912bafb1e20d6ebd0a45cc585d
- MD5 SHA1 SHA512
- Path C:\ProgramData\6B3E.tmp
- Size 14KB
- SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
- MD5 294e9f64cb1642dd89229fff0592856b
- SHA1 97b148c27f3da29ba7b18d6aee8a0db9102f47c9
- SHA512 b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
- SSDEEP 384:5cFP7VtpK4p+31Mzh79W5vM+ZyUgGq4BtMvAxXCRsi:A7Vf9p+qQ02y5HW6kX
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AAtvmKv4L.README.txt
- Size 434B
- SHA256 192d1e6078570865531e8a4c9840a483c4a2ac35fe468107284991f6da813191
- MD5 b4709a56b9d7f431da172316cda720be
- SHA1 d2132f7129a7003ec4c0392f0f08cd24ea353da6
- SHA512 e390d51e95db5e56c666a2895dc87dab41d97e7ce3c0df1f2466abf14a651167232521ab5f52746d16bab0ef14e6c0ee9dcfe29894604d695b0d064909378227
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{5A387DC5-AB87-4E67-958B-D7FD4788D844}.xps
- Size 13.0MB
- SHA256 12e83a3b5ae926b7192f5159e36cc386749ba059e4a76aef26206c8deb24c2a0
- MD5 fbce2d58691f11f58d97b94360c53da7
- SHA1 f62ebd58c8b00fd4e47b49626070e5739393dae5
- SHA512 427c9f3d3f9f6367455bc95a2ed40b6ef5d271ec70f7fecf9855a7e1b701ef0a745c05aa7c6de0f1216c281b9d447e26278b5a8ba534b07725f79cb00f3aa798
- SSDEEP 393216:PvTG+i5JC9kgivO8443c9XR9Wi/oBHrgOBsRVlb2:PvTG+i549kgivb443c9XR9Wi/oBHrgOT
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\DDDDDD
- Size 194KB
- SHA256 32a2f038b8b3a00084f35cd4f9e8d431e37d46092b28cbdf5a864c3580b98787
- MD5 ed9105105e20cf333874da0c285c9141
- SHA1 d5c8e7bd717ca6a473bc223222bf1d3800a5c864
- SHA512 a01f625aeb2ee3b598dd68612b1832a681811df61a6cb8947ee7cac2066ba49a4a0d8e9419596e422331c6842320d3f96db5d896b5d0079b47fb2b0f19eb7743
- SSDEEP 3072:rdOuULyRC3HvQK9uPSgs/KudOuULyRC3HvQK9uPSgs/KudOuULyRC3HvQK9uPSgt:RO6RaHAPWO6RaHAPWO6RaHAPWOP
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\{03058613-575A-4EEF-A8CF-CE176D1849B8}
- Size 4KB
- SHA256 64f841b5ebacd32872c8cb893e3ec3846d992e7638552c93e53d21b36a3082b5
- MD5 62c5bd55058b4c6b9a217659c0bf2dd8
- SHA1 1c5fb4da390281ca59d2963bd4c29503f8d1c2d0
- SHA512 e7657e4223ae91d435dc64b12d7b0515c7be8b96aaa6c3a79b7b8052d5a7ed045c039f4b4a0632282552322d283a294518e6886f86b0b7ba7a49a178b6acb607
- SSDEEP 6:XwEEJ2YyfhcD1WXUn/cXClJgrdoRujslll:X/ZYyfmJ2U/cXCld/l
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\{05167FCD-5985-4BE3-B6FE-522FAA4A6C1D}
- Size 4KB
- SHA256 dae98ed44a3e57c1e459d847815177da20aa27a0a213b425ac8a58be11cde895
- MD5 1837a6e1d47b0fe96b353bbe3b9d6a2d
- SHA1 8905d7dc53a68ca62457d53bf61bfcafa63c91ea
- SHA512 aa20d920daeed61160df2b2b72f6b55d38c15017e2bf9415544bd37e2267fd40d9a486c93db50b357ac58c410fd9f5e1ae10e65392cc3ace9fb0df17a72259f4
- SSDEEP 6:RajhUlVYyfB3h1RRXUnfw5X3/0W0/VFKZhK/NhK/JRujlw//0lweI/M8hK/7Rujd:Raj+lVYyf9/Ufgv+SI/NI/+Wf/M8I/S
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\UProof\ExcludeDictionaryEN0409.lex
- Size 2B
- SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
- MD5 f3b25701fe362ec84616a93a45ce9998
- SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
- SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
- MD5 SHA1 SHA512
- Path C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2
- Size 4KB
- SHA256 2a6e8aebae43fa39d23c61d6bd8f622038d30476321a562263877f4209a753db
- MD5 f0346194c07ad5420717bb9f4052bcc4
- SHA1 4a29e8a36681563b5fa870bc4e5df5bb51ce3eaf
- SHA512 633ec9c7da1e71f70e5118692481f81dd44bf9a889048a2626622df170f03d0aac14859191083f443bc1569d732b20947e887382674ad1550ef177181f484aaa
- SSDEEP 12:Raj+lVYyfHj/UvQA/+SI/NI/+W6/M8I/Dk8I/ZBhLOEIxA/L:Yj+lVYyfHYx/+X/+/+GJ/DkJ/ThK1Aj
- MD5 SHA1 SHA512 SSDEEP
- Path F:\$RECYCLE.BIN\S-1-5-21-2860750803-256193626-1801997576-1000\DDDDDDDDDDD
- Size 129B
- SHA256 9cbd0dca1925dd08a91526b4260fd81fdaebba0c4e6c76998170ac5949d26764
- MD5 652560824463523d766390d750292e5c
- SHA1 8e5a2894bc9f187abb0f9c955177c250b54948fb
- SHA512 0faf639b6ca564250f7e6b019a5980babae14ce4c81f89cb008f44a013b798f63b9a6a1d5507dba3b46c11bafc3e2007586339218c2000d9f3b8cdb9867cbf26
- MD5 SHA1 SHA512