Analysis
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max time kernel
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max time network
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platform
windows11-21h2_x64 -
resource
win11-20241007-en -
resource tags
arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system -
submitted
08-12-2024 14:59
Errors
General
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Target
Umbral.exe
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Size
229KB
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MD5
0cc2a414bb58a3f9e345ea56350ff9a4
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SHA1
09ec47af8c94ac3a94ad0e29df8a1405a6bc9e01
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SHA256
2ce5ab90e160d795bee80f40ab817b2beb35fb43845e61658942eda4ca0b376c
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SHA512
007ea98156043b18be5a612741ca9d2a0494dd5a5f7cea06a27185ac0de3950dd295d7e5066ea4313e3c517159b96450397e9645798fb2a2abd92ab8c21adccb
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SSDEEP
6144:tloZM0rIkd8g+EtXHkv/iD4eKbNoOJBiVHaIJtM9Xb8e1mgri:voZDL+EP8eKbNoOJBiVHaIJtMZ3m
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral1/memory/5600-1-0x00000279C4080000-0x00000279C40C0000-memory.dmp family_umbral -
Umbral family
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Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 1872 powershell.exe 1656 powershell.exe 4524 powershell.exe 336 powershell.exe -
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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Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 3 discord.com 6 discord.com -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 3 ip-api.com -
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
pid Process 5704 wmic.exe -
Modifies data under HKEY_USERS 15 IoCs
description ioc Process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" LogonUI.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00 LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "217" LogonUI.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2352 vlc.exe -
Suspicious behavior: EnumeratesProcesses 11 IoCs
pid Process 5600 Umbral.exe 1872 powershell.exe 1872 powershell.exe 336 powershell.exe 336 powershell.exe 1656 powershell.exe 1656 powershell.exe 3056 powershell.exe 3056 powershell.exe 4524 powershell.exe 4524 powershell.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2352 vlc.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 5600 Umbral.exe Token: SeIncreaseQuotaPrivilege 2936 wmic.exe Token: SeSecurityPrivilege 2936 wmic.exe Token: SeTakeOwnershipPrivilege 2936 wmic.exe Token: SeLoadDriverPrivilege 2936 wmic.exe Token: SeSystemProfilePrivilege 2936 wmic.exe Token: SeSystemtimePrivilege 2936 wmic.exe Token: SeProfSingleProcessPrivilege 2936 wmic.exe Token: SeIncBasePriorityPrivilege 2936 wmic.exe Token: SeCreatePagefilePrivilege 2936 wmic.exe Token: SeBackupPrivilege 2936 wmic.exe Token: SeRestorePrivilege 2936 wmic.exe Token: SeShutdownPrivilege 2936 wmic.exe Token: SeDebugPrivilege 2936 wmic.exe Token: SeSystemEnvironmentPrivilege 2936 wmic.exe Token: SeRemoteShutdownPrivilege 2936 wmic.exe Token: SeUndockPrivilege 2936 wmic.exe Token: SeManageVolumePrivilege 2936 wmic.exe Token: 33 2936 wmic.exe Token: 34 2936 wmic.exe Token: 35 2936 wmic.exe Token: 36 2936 wmic.exe Token: SeIncreaseQuotaPrivilege 2936 wmic.exe Token: SeSecurityPrivilege 2936 wmic.exe Token: SeTakeOwnershipPrivilege 2936 wmic.exe Token: SeLoadDriverPrivilege 2936 wmic.exe Token: SeSystemProfilePrivilege 2936 wmic.exe Token: SeSystemtimePrivilege 2936 wmic.exe Token: SeProfSingleProcessPrivilege 2936 wmic.exe Token: SeIncBasePriorityPrivilege 2936 wmic.exe Token: SeCreatePagefilePrivilege 2936 wmic.exe Token: SeBackupPrivilege 2936 wmic.exe Token: SeRestorePrivilege 2936 wmic.exe Token: SeShutdownPrivilege 2936 wmic.exe Token: SeDebugPrivilege 2936 wmic.exe Token: SeSystemEnvironmentPrivilege 2936 wmic.exe Token: SeRemoteShutdownPrivilege 2936 wmic.exe Token: SeUndockPrivilege 2936 wmic.exe Token: SeManageVolumePrivilege 2936 wmic.exe Token: 33 2936 wmic.exe Token: 34 2936 wmic.exe Token: 35 2936 wmic.exe Token: 36 2936 wmic.exe Token: SeDebugPrivilege 1872 powershell.exe Token: SeDebugPrivilege 336 powershell.exe Token: SeDebugPrivilege 1656 powershell.exe Token: SeDebugPrivilege 3056 powershell.exe Token: SeIncreaseQuotaPrivilege 1536 wmic.exe Token: SeSecurityPrivilege 1536 wmic.exe Token: SeTakeOwnershipPrivilege 1536 wmic.exe Token: SeLoadDriverPrivilege 1536 wmic.exe Token: SeSystemProfilePrivilege 1536 wmic.exe Token: SeSystemtimePrivilege 1536 wmic.exe Token: SeProfSingleProcessPrivilege 1536 wmic.exe Token: SeIncBasePriorityPrivilege 1536 wmic.exe Token: SeCreatePagefilePrivilege 1536 wmic.exe Token: SeBackupPrivilege 1536 wmic.exe Token: SeRestorePrivilege 1536 wmic.exe Token: SeShutdownPrivilege 1536 wmic.exe Token: SeDebugPrivilege 1536 wmic.exe Token: SeSystemEnvironmentPrivilege 1536 wmic.exe Token: SeRemoteShutdownPrivilege 1536 wmic.exe Token: SeUndockPrivilege 1536 wmic.exe Token: SeManageVolumePrivilege 1536 wmic.exe -
Suspicious use of FindShellTrayWindow 4 IoCs
pid Process 2352 vlc.exe 2352 vlc.exe 2352 vlc.exe 2352 vlc.exe -
Suspicious use of SendNotifyMessage 3 IoCs
pid Process 2352 vlc.exe 2352 vlc.exe 2352 vlc.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2352 vlc.exe 3420 LogonUI.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 5600 wrote to memory of 2936 5600 Umbral.exe 78 PID 5600 wrote to memory of 2936 5600 Umbral.exe 78 PID 5600 wrote to memory of 1872 5600 Umbral.exe 82 PID 5600 wrote to memory of 1872 5600 Umbral.exe 82 PID 5600 wrote to memory of 336 5600 Umbral.exe 84 PID 5600 wrote to memory of 336 5600 Umbral.exe 84 PID 5600 wrote to memory of 1656 5600 Umbral.exe 86 PID 5600 wrote to memory of 1656 5600 Umbral.exe 86 PID 5600 wrote to memory of 3056 5600 Umbral.exe 88 PID 5600 wrote to memory of 3056 5600 Umbral.exe 88 PID 5600 wrote to memory of 1536 5600 Umbral.exe 90 PID 5600 wrote to memory of 1536 5600 Umbral.exe 90 PID 5600 wrote to memory of 4988 5600 Umbral.exe 92 PID 5600 wrote to memory of 4988 5600 Umbral.exe 92 PID 5600 wrote to memory of 3212 5600 Umbral.exe 94 PID 5600 wrote to memory of 3212 5600 Umbral.exe 94 PID 5600 wrote to memory of 4524 5600 Umbral.exe 96 PID 5600 wrote to memory of 4524 5600 Umbral.exe 96 PID 5600 wrote to memory of 5704 5600 Umbral.exe 98 PID 5600 wrote to memory of 5704 5600 Umbral.exe 98
Processes
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C:\Users\Admin\AppData\Local\Temp\Umbral.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5600 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2936
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1872
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 22⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:336
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1656
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3056
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1536
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory2⤵PID:4988
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵PID:3212
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
PID:4524
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name2⤵
- Detects videocard installed
PID:5704
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:6100
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C:\Program Files\VideoLAN\VLC\vlc.exe"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Downloads\TestInstall.mov"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:2352
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C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x4 /state0:0xa3a10855 /state1:0x41c64e6d1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3420
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2KB
MD5627073ee3ca9676911bee35548eff2b8
SHA14c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA25685b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
SHA5123c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
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Filesize
944B
MD51a9fa92a4f2e2ec9e244d43a6a4f8fb9
SHA19910190edfaccece1dfcc1d92e357772f5dae8f7
SHA2560ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888
SHA5125d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64
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Filesize
948B
MD545741c307af2576c6437c5fdb24ef9ce
SHA1a6ba7a7705db14ac29a18a98dd7deb4cc759c3bf
SHA2567887859f7179e194ff9b78f8d8fa3830790110a01597f21ff48c84cd935e49d2
SHA51239fdc5931563cbf826e8b643b5f0dcdf45bb6f95a8eeb460499257ca41b3dbee4c692eaacc3fd33bddf4b6ff0c828981ed7e9cd080007bbb9f0b28e7d0d66941
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Filesize
1KB
MD50ac871344dc49ae49f13f0f88acb4868
SHA15a073862375c7e79255bb0eab32c635b57a77f98
SHA256688f15b59a784f6f4c62554f00b5d0840d1489cef989c18126c70dfee0806d37
SHA512ace5c50303bd27998607cf34ac4322bcf5edfbd19bbb24309acf4d037b6f3f7636c7c14b6ac0b924114e036252d3a1b998951c7068f41548728fa5d92f5f9006
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Filesize
1KB
MD583f6e5e020e57e01c9165d9085a35c1f
SHA1eaf3331202b8d9e3cbcfbd05e2da74f449196639
SHA2564ab76fb219a0d3ffb4e41b86a2a0544af4766585b331f96accfd18cc4b32c53b
SHA512bd46fe0b1954bc06abf72b826619534a6110a3f9160c7e67ed0c820fbf100bc88fbcc89855d6b33fc5b6259621f9d8efe32be8a171be71c7503b7e934ff125c3
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82