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Resubmissions
03/08/2024, 12:19
240803-pg7lpasfql 1015/03/2024, 00:25
240315-aqtc4adf33 1015/03/2024, 00:20
240315-amv3hsde39 10Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
15/03/2024, 00:20
Behavioral task
behavioral1
Sample
LB3.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
LB3.exe
Resource
win10v2004-20240226-en
General
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Target
LB3.exe
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Size
147KB
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MD5
1973ccbab82020881d531ccd1f2ca48e
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SHA1
7e18f712e26ea32b0e8aeb4cd3c958eb8d32dfed
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SHA256
d20d22dd302f51341405794a8fb3866c234fafe614b67b55934a9a959a4cd847
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SHA512
67654e67afe6a3e1ddf335dff4b976e254c45d8046853607cb4e98af6cd43accee8f2e35e296b932385bc9a6b7fed96ee4be6e113457eb5eb057bd8301f476f6
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SSDEEP
1536:PzICS4AAwczUUf8y8gvMH+1zGSNAojMP95D1xD8UhzyIccE+72p2Kbm+0ep3PeAM:wqJogYkcSNm9V7D8URMcS0ep3BcTT
Malware Config
Extracted
C:\xcEElHqGu.README.txt
lockbit
Signatures
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Lockbit
Ransomware family with multiple variants released since late 2019.
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Renames multiple (621) 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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 196B.tmp -
Deletes itself 1 IoCs
pid Process 2324 196B.tmp -
Executes dropped EXE 1 IoCs
pid Process 2324 196B.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-1-5-21-3808065738-1666277613-1125846146-1000\desktop.ini LB3.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3808065738-1666277613-1125846146-1000\desktop.ini LB3.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\PP7p22yzbd5jayhw50q9t0ppum.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPrfm30f9p40yzuwc08f1i44lob.TMP printfilterpipelinesvc.exe File created C:\Windows\system32\spool\PRINTERS\PPcuqj6u3bk0piutglkq5bad00.TMP printfilterpipelinesvc.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\xcEElHqGu.bmp" LB3.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\xcEElHqGu.bmp" LB3.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 2324 196B.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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\SystemFamily ONENOTE.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU ONENOTE.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS ONENOTE.EXE -
Modifies Control Panel 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop LB3.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\WallpaperStyle = "10" LB3.exe -
Modifies registry class 5 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.xcEElHqGu\ = "xcEElHqGu" LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\xcEElHqGu\DefaultIcon LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\xcEElHqGu LB3.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\xcEElHqGu\DefaultIcon\ = "C:\\ProgramData\\xcEElHqGu.ico" LB3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.xcEElHqGu LB3.exe -
Opens file in notepad (likely ransom note) 2 IoCs
pid Process 1684 NOTEPAD.EXE 5076 NOTEPAD.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe 3248 LB3.exe -
Suspicious behavior: RenamesItself 26 IoCs
pid Process 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp 2324 196B.tmp -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeAssignPrimaryTokenPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeDebugPrivilege 3248 LB3.exe Token: 36 3248 LB3.exe Token: SeImpersonatePrivilege 3248 LB3.exe Token: SeIncBasePriorityPrivilege 3248 LB3.exe Token: SeIncreaseQuotaPrivilege 3248 LB3.exe Token: 33 3248 LB3.exe Token: SeManageVolumePrivilege 3248 LB3.exe Token: SeProfSingleProcessPrivilege 3248 LB3.exe Token: SeRestorePrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSystemProfilePrivilege 3248 LB3.exe Token: SeTakeOwnershipPrivilege 3248 LB3.exe Token: SeShutdownPrivilege 3248 LB3.exe Token: SeDebugPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeBackupPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe Token: SeSecurityPrivilege 3248 LB3.exe -
Suspicious use of SetWindowsHookEx 13 IoCs
pid Process 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE 4296 ONENOTE.EXE -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 3248 wrote to memory of 4404 3248 LB3.exe 112 PID 3248 wrote to memory of 4404 3248 LB3.exe 112 PID 4672 wrote to memory of 4296 4672 printfilterpipelinesvc.exe 115 PID 4672 wrote to memory of 4296 4672 printfilterpipelinesvc.exe 115 PID 3248 wrote to memory of 2324 3248 LB3.exe 116 PID 3248 wrote to memory of 2324 3248 LB3.exe 116 PID 3248 wrote to memory of 2324 3248 LB3.exe 116 PID 3248 wrote to memory of 2324 3248 LB3.exe 116 PID 2324 wrote to memory of 3216 2324 196B.tmp 117 PID 2324 wrote to memory of 3216 2324 196B.tmp 117 PID 2324 wrote to memory of 3216 2324 196B.tmp 117
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
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3248 -
C:\Windows\splwow64.exeC:\Windows\splwow64.exe 122882⤵
- Drops file in System32 directory
PID:4404
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C:\ProgramData\196B.tmp"C:\ProgramData\196B.tmp"2⤵
- Checks computer location settings
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2324 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\196B.tmp >> NUL3⤵PID:3216
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\xcEElHqGu.README.txt1⤵
- Opens file in notepad (likely ransom note)
PID:1684
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1420 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:81⤵PID:5088
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\xcEElHqGu.README.txt1⤵
- Opens file in notepad (likely ransom note)
PID:5076
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc1⤵PID:4340
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C:\Windows\system32\printfilterpipelinesvc.exeC:\Windows\system32\printfilterpipelinesvc.exe -Embedding1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4672 -
C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE/insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{1E5DC798-666C-4280-BDFB-44EA9EA4D966}.xps" 1335493569089300002⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
PID:4296
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129B
MD5fbb6382d7251edfc8e4cc832d60fe515
SHA18820a4187f6d798f6ae15ff834511a627edda754
SHA256b9d225c9d60470eaced140aa408ac601bae8fc3a3fabbd806ed40d5df9ee49fd
SHA5126929999b28fe748ffb4ee0aa56749c3e9c677df958221bdf9b99ffc575ca4061bc9a1d86f17db11a5ed5d27c87678d2a19cab789cb8edf584cfb461024cae85f
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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Filesize
147KB
MD504ce88e9c1138f84ba8ce1a05a382ae0
SHA11416918b9c139a6b416de27abbaa2fb03ae8d347
SHA256bf0fce7a116cab827df13677469664a62b3aef805e53fa3332f33551a81cf269
SHA5128581a7cfc2dc8137c7a2ddcac2f5977f4e295896bf69f9047dd92611dfa93a8d6c024a6fda97b301356eb53e46d09a70e906e28bf258c3447fbf9ced3bff7b4e
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Filesize
4KB
MD5dc5bfc28960938b3119dd308a1e8daa5
SHA18334175f0f33fda8d3cf4513168b3c5dbe5aa1e0
SHA2560925af33f8098242a0b3c5d611921f81f030a514d45b0d2cd3ef8e7c09275b05
SHA512d6fa90a4d16c7642cbf64caa040ceb15cd22f03bee661a5511c45cf599d209355c0baef60aa487137bef807bdf0510604fb0df65999416f8920995d743a4cdb1
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Filesize
4KB
MD55814aad5cc19704a9da13e11605d12af
SHA100b1a92382e4171a3b007a0e518b4e18ad5da7a7
SHA2566b0e91e7d436133c4b29d779e0c8e85a59e815c778e4dd4bf46662a3ac1b0972
SHA51208a78200d736e7b84fbb7954216f026efc07fd1ac6899ccfecd0874fa1db021f95adb25cc796bd093254734f29c7f7576b3f34b24b0575beb1cfb44f7543c6fa
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Filesize
1KB
MD57fd2336a4cae4c2f51bb0860a6748860
SHA169ef22fd3afb86945d371d4be0fe9c507880dd1b
SHA256413dd9df6327c861bd0ba99a1e99b2b00b75961230d8b499c993419da1ecca29
SHA5128791bd4195522517edd5a05cec17473fb01bd9865d4f4ea9966ee105fc0dc9d720c56c84af278d3bb5b31915aba678b7786e086f4890ea138f2ff47f0288c523
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Filesize
129B
MD503c9a0b2bc31b6d5760ad8e6099afb97
SHA15328ee207bc2586518cb2af727c12cae056cab88
SHA256b5f827027dc573782236d80bce651c42208f666d136211a4b064f3adacf7a3e9
SHA512e3926a961e78528b71d43e1c7a3cfa97372c598f402a17cc6e0c697d0cbee828de45231a08cb272246d4d52382cc2998d65dfb34582a308125cff0a06ab1d531