Analysis
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max time kernel
66s -
max time network
22s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-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 (364) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Deletes itself 1 IoCs
pid Process 2076 DB23.tmp -
Executes dropped EXE 1 IoCs
pid Process 2076 DB23.tmp -
Loads dropped DLL 1 IoCs
pid Process 1580 lb.exe -
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-1-5-21-3434294380-2554721341-1919518612-1000\desktop.ini lb.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3434294380-2554721341-1919518612-1000\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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Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\AAtvmKv4L.bmp" lb.exe Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\AAtvmKv4L.bmp" lb.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
pid Process 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 2076 DB23.tmp -
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 cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language lb.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language DB23.tmp -
Modifies Control Panel 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Control Panel\Desktop\WallpaperStyle = "10" lb.exe Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Control Panel\Desktop 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\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 Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AAtvmKv4L\DefaultIcon lb.exe -
Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe 1580 lb.exe -
Suspicious behavior: RenamesItself 26 IoCs
pid Process 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp 2076 DB23.tmp -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeAssignPrimaryTokenPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeDebugPrivilege 1580 lb.exe Token: 36 1580 lb.exe Token: SeImpersonatePrivilege 1580 lb.exe Token: SeIncBasePriorityPrivilege 1580 lb.exe Token: SeIncreaseQuotaPrivilege 1580 lb.exe Token: 33 1580 lb.exe Token: SeManageVolumePrivilege 1580 lb.exe Token: SeProfSingleProcessPrivilege 1580 lb.exe Token: SeRestorePrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSystemProfilePrivilege 1580 lb.exe Token: SeTakeOwnershipPrivilege 1580 lb.exe Token: SeShutdownPrivilege 1580 lb.exe Token: SeDebugPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeBackupPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe Token: SeSecurityPrivilege 1580 lb.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 1580 wrote to memory of 2076 1580 lb.exe 33 PID 1580 wrote to memory of 2076 1580 lb.exe 33 PID 1580 wrote to memory of 2076 1580 lb.exe 33 PID 1580 wrote to memory of 2076 1580 lb.exe 33 PID 1580 wrote to memory of 2076 1580 lb.exe 33 PID 2076 wrote to memory of 2544 2076 DB23.tmp 34 PID 2076 wrote to memory of 2544 2076 DB23.tmp 34 PID 2076 wrote to memory of 2544 2076 DB23.tmp 34 PID 2076 wrote to memory of 2544 2076 DB23.tmp 34
Processes
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C:\Users\Admin\AppData\Local\Temp\lb.exe"C:\Users\Admin\AppData\Local\Temp\lb.exe"1⤵
- Loads dropped DLL
- 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:1580 -
C:\ProgramData\DB23.tmp"C:\ProgramData\DB23.tmp"2⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2076 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\DB23.tmp >> NUL3⤵
- System Location Discovery: System Language Discovery
PID:2544
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x1481⤵PID:1880
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129B
MD5146f02e64de119f76d263b29de13f998
SHA1adf75af6307bb8525e6a9705906cf0da9178a8f7
SHA256022fabbc1e8e6de9aa3ac00bf2c7b2f057d7b26a15aa4eaa56654f2fa81fe1f0
SHA512f21c6b2b151089079ef53bedf5caed86a7c548020abfbb577edccc32eb03fd776b4f2d77d24cb9d453c44eb8ab00fd72d359bfa91a00abe6de1695b04e06fe0b
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Filesize
434B
MD5b4709a56b9d7f431da172316cda720be
SHA1d2132f7129a7003ec4c0392f0f08cd24ea353da6
SHA256192d1e6078570865531e8a4c9840a483c4a2ac35fe468107284991f6da813191
SHA512e390d51e95db5e56c666a2895dc87dab41d97e7ce3c0df1f2466abf14a651167232521ab5f52746d16bab0ef14e6c0ee9dcfe29894604d695b0d064909378227
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Filesize
194KB
MD5da5e27fd54cf3d1eed75757f01abcb2c
SHA1998468336e0e31205dc5d30e2a038e009682205a
SHA256364fd809e59ac0b9f3629cff0de608ffda94aefafd44476f2a14fe9e9c0f1dbd
SHA51225803c2b91ee18d2e89f4dd3d1779146b57402e60cf2f7f8a13dcac93d3b7429f36d8e41cec4182a86ae0e47f0d46a3ee8aa85ca774f5feb12c21cba319ddb19
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Filesize
129B
MD5a15db8a283455fa2146805d0f774f431
SHA1ae5287835f3065474fb55c8ff067c3a585cc0374
SHA25631820023a93797e781eaa16deeee50c14096b218309fb3fff098a458dd73b6d2
SHA512c3e17c5f4e4efe733149836dba05bba4b5727a221e2d5ad060d26c435ec3320bfef7afc961659be8ff5ba14cf93f5708edbc14deaefead2359f0a3f2d6dce3ce
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf