Analysis
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max time kernel
117s -
max time network
117s -
platform
windows7_x64 -
resource
win7-20240729-en -
resource tags
arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system -
submitted
06-09-2024 05:55
Static task
static1
Behavioral task
behavioral1
Sample
74e445436b010306f116973c93656630N.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
74e445436b010306f116973c93656630N.exe
Resource
win10v2004-20240802-en
General
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Target
74e445436b010306f116973c93656630N.exe
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Size
170KB
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MD5
74e445436b010306f116973c93656630
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SHA1
b1176522355a5863f5c7d7d3ca9db3889bbc485b
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SHA256
dceb4a5e6cd2b0d37758cff6b217c69472d6bc6844617817fe22fbf86b7b7135
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SHA512
8a331a232b877e329110bb264efe79baaa1189316ac1cabefd12f82f249cf7c8415aec6e1df300e132ba8b6bcc9265e6b1b39847e3baea1d0f1e7e698ad2e367
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SSDEEP
3072:hVK2s3mxhbEmdMfQw/eJPGN0wxdFk7G1xB3O/Ga/32hK505EyWEBuedcH5e0K:hVE3m7bh+/eJPGVx0MxB3O/Ga/cQ05vh
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1273828074898718851/qR9eE6omxJxFL_jVry1J18IsVQ6bHhsk5rGr5VLxyO-92VJHyGPK43BBNMWtaUG56gE2
Signatures
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Detect Umbral payload 2 IoCs
resource yara_rule behavioral1/files/0x000700000001939b-10.dat family_umbral behavioral1/memory/2200-16-0x0000000000C80000-0x0000000000CC0000-memory.dmp family_umbral -
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
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Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 2448 powershell.exe 2900 powershell.exe 1068 powershell.exe 1988 powershell.exe 2592 powershell.exe -
Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\drivers\etc\hosts Umbral.exe -
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
pid Process 1980 attrib.exe 2264 attrib.exe -
Executes dropped EXE 3 IoCs
pid Process 2892 WmZWbh4b.exe 2200 Umbral.exe 2604 $77svchost.exe -
Loads dropped DLL 3 IoCs
pid Process 2540 74e445436b010306f116973c93656630N.exe 2540 74e445436b010306f116973c93656630N.exe 1488 cmd.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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\Exec\\$77svchost.exe\"" WmZWbh4b.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 10 discord.com 9 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 6 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 1 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 74e445436b010306f116973c93656630N.exe -
System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs
Adversaries may check for Internet connectivity on compromised systems.
pid Process 3008 cmd.exe 892 PING.EXE -
Delays execution with timeout.exe 1 IoCs
pid Process 2724 timeout.exe -
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
pid Process 1256 wmic.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 892 PING.EXE -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2704 schtasks.exe 2496 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 2200 Umbral.exe 2448 powershell.exe 2900 powershell.exe 1068 powershell.exe 2192 powershell.exe 2892 WmZWbh4b.exe 1988 powershell.exe 2592 powershell.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 2200 Umbral.exe Token: SeIncreaseQuotaPrivilege 2740 wmic.exe Token: SeSecurityPrivilege 2740 wmic.exe Token: SeTakeOwnershipPrivilege 2740 wmic.exe Token: SeLoadDriverPrivilege 2740 wmic.exe Token: SeSystemProfilePrivilege 2740 wmic.exe Token: SeSystemtimePrivilege 2740 wmic.exe Token: SeProfSingleProcessPrivilege 2740 wmic.exe Token: SeIncBasePriorityPrivilege 2740 wmic.exe Token: SeCreatePagefilePrivilege 2740 wmic.exe Token: SeBackupPrivilege 2740 wmic.exe Token: SeRestorePrivilege 2740 wmic.exe Token: SeShutdownPrivilege 2740 wmic.exe Token: SeDebugPrivilege 2740 wmic.exe Token: SeSystemEnvironmentPrivilege 2740 wmic.exe Token: SeRemoteShutdownPrivilege 2740 wmic.exe Token: SeUndockPrivilege 2740 wmic.exe Token: SeManageVolumePrivilege 2740 wmic.exe Token: 33 2740 wmic.exe Token: 34 2740 wmic.exe Token: 35 2740 wmic.exe Token: SeIncreaseQuotaPrivilege 2740 wmic.exe Token: SeSecurityPrivilege 2740 wmic.exe Token: SeTakeOwnershipPrivilege 2740 wmic.exe Token: SeLoadDriverPrivilege 2740 wmic.exe Token: SeSystemProfilePrivilege 2740 wmic.exe Token: SeSystemtimePrivilege 2740 wmic.exe Token: SeProfSingleProcessPrivilege 2740 wmic.exe Token: SeIncBasePriorityPrivilege 2740 wmic.exe Token: SeCreatePagefilePrivilege 2740 wmic.exe Token: SeBackupPrivilege 2740 wmic.exe Token: SeRestorePrivilege 2740 wmic.exe Token: SeShutdownPrivilege 2740 wmic.exe Token: SeDebugPrivilege 2740 wmic.exe Token: SeSystemEnvironmentPrivilege 2740 wmic.exe Token: SeRemoteShutdownPrivilege 2740 wmic.exe Token: SeUndockPrivilege 2740 wmic.exe Token: SeManageVolumePrivilege 2740 wmic.exe Token: 33 2740 wmic.exe Token: 34 2740 wmic.exe Token: 35 2740 wmic.exe Token: SeBackupPrivilege 2772 vssvc.exe Token: SeRestorePrivilege 2772 vssvc.exe Token: SeAuditPrivilege 2772 vssvc.exe Token: SeDebugPrivilege 2448 powershell.exe Token: SeDebugPrivilege 2900 powershell.exe Token: SeDebugPrivilege 1068 powershell.exe Token: SeDebugPrivilege 2192 powershell.exe Token: SeDebugPrivilege 2892 WmZWbh4b.exe Token: SeIncreaseQuotaPrivilege 472 wmic.exe Token: SeSecurityPrivilege 472 wmic.exe Token: SeTakeOwnershipPrivilege 472 wmic.exe Token: SeLoadDriverPrivilege 472 wmic.exe Token: SeSystemProfilePrivilege 472 wmic.exe Token: SeSystemtimePrivilege 472 wmic.exe Token: SeProfSingleProcessPrivilege 472 wmic.exe Token: SeIncBasePriorityPrivilege 472 wmic.exe Token: SeCreatePagefilePrivilege 472 wmic.exe Token: SeBackupPrivilege 472 wmic.exe Token: SeRestorePrivilege 472 wmic.exe Token: SeShutdownPrivilege 472 wmic.exe Token: SeDebugPrivilege 472 wmic.exe Token: SeSystemEnvironmentPrivilege 472 wmic.exe Token: SeRemoteShutdownPrivilege 472 wmic.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 2540 wrote to memory of 2892 2540 74e445436b010306f116973c93656630N.exe 29 PID 2540 wrote to memory of 2892 2540 74e445436b010306f116973c93656630N.exe 29 PID 2540 wrote to memory of 2892 2540 74e445436b010306f116973c93656630N.exe 29 PID 2540 wrote to memory of 2892 2540 74e445436b010306f116973c93656630N.exe 29 PID 2540 wrote to memory of 2200 2540 74e445436b010306f116973c93656630N.exe 30 PID 2540 wrote to memory of 2200 2540 74e445436b010306f116973c93656630N.exe 30 PID 2540 wrote to memory of 2200 2540 74e445436b010306f116973c93656630N.exe 30 PID 2540 wrote to memory of 2200 2540 74e445436b010306f116973c93656630N.exe 30 PID 2200 wrote to memory of 2740 2200 Umbral.exe 32 PID 2200 wrote to memory of 2740 2200 Umbral.exe 32 PID 2200 wrote to memory of 2740 2200 Umbral.exe 32 PID 2200 wrote to memory of 1776 2200 Umbral.exe 37 PID 2200 wrote to memory of 1776 2200 Umbral.exe 37 PID 2200 wrote to memory of 1776 2200 Umbral.exe 37 PID 2200 wrote to memory of 2448 2200 Umbral.exe 39 PID 2200 wrote to memory of 2448 2200 Umbral.exe 39 PID 2200 wrote to memory of 2448 2200 Umbral.exe 39 PID 2200 wrote to memory of 2900 2200 Umbral.exe 41 PID 2200 wrote to memory of 2900 2200 Umbral.exe 41 PID 2200 wrote to memory of 2900 2200 Umbral.exe 41 PID 2200 wrote to memory of 1068 2200 Umbral.exe 43 PID 2200 wrote to memory of 1068 2200 Umbral.exe 43 PID 2200 wrote to memory of 1068 2200 Umbral.exe 43 PID 2200 wrote to memory of 2192 2200 Umbral.exe 45 PID 2200 wrote to memory of 2192 2200 Umbral.exe 45 PID 2200 wrote to memory of 2192 2200 Umbral.exe 45 PID 2892 wrote to memory of 1980 2892 WmZWbh4b.exe 47 PID 2892 wrote to memory of 1980 2892 WmZWbh4b.exe 47 PID 2892 wrote to memory of 1980 2892 WmZWbh4b.exe 47 PID 2892 wrote to memory of 2264 2892 WmZWbh4b.exe 49 PID 2892 wrote to memory of 2264 2892 WmZWbh4b.exe 49 PID 2892 wrote to memory of 2264 2892 WmZWbh4b.exe 49 PID 2200 wrote to memory of 472 2200 Umbral.exe 51 PID 2200 wrote to memory of 472 2200 Umbral.exe 51 PID 2200 wrote to memory of 472 2200 Umbral.exe 51 PID 2200 wrote to memory of 1536 2200 Umbral.exe 53 PID 2200 wrote to memory of 1536 2200 Umbral.exe 53 PID 2200 wrote to memory of 1536 2200 Umbral.exe 53 PID 2200 wrote to memory of 3036 2200 Umbral.exe 55 PID 2200 wrote to memory of 3036 2200 Umbral.exe 55 PID 2200 wrote to memory of 3036 2200 Umbral.exe 55 PID 2200 wrote to memory of 1988 2200 Umbral.exe 57 PID 2200 wrote to memory of 1988 2200 Umbral.exe 57 PID 2200 wrote to memory of 1988 2200 Umbral.exe 57 PID 2200 wrote to memory of 1256 2200 Umbral.exe 59 PID 2200 wrote to memory of 1256 2200 Umbral.exe 59 PID 2200 wrote to memory of 1256 2200 Umbral.exe 59 PID 2200 wrote to memory of 3008 2200 Umbral.exe 61 PID 2200 wrote to memory of 3008 2200 Umbral.exe 61 PID 2200 wrote to memory of 3008 2200 Umbral.exe 61 PID 3008 wrote to memory of 892 3008 cmd.exe 63 PID 3008 wrote to memory of 892 3008 cmd.exe 63 PID 3008 wrote to memory of 892 3008 cmd.exe 63 PID 2892 wrote to memory of 1488 2892 WmZWbh4b.exe 64 PID 2892 wrote to memory of 1488 2892 WmZWbh4b.exe 64 PID 2892 wrote to memory of 1488 2892 WmZWbh4b.exe 64 PID 1488 wrote to memory of 2724 1488 cmd.exe 66 PID 1488 wrote to memory of 2724 1488 cmd.exe 66 PID 1488 wrote to memory of 2724 1488 cmd.exe 66 PID 1488 wrote to memory of 2604 1488 cmd.exe 67 PID 1488 wrote to memory of 2604 1488 cmd.exe 67 PID 1488 wrote to memory of 2604 1488 cmd.exe 67 PID 2604 wrote to memory of 2584 2604 $77svchost.exe 69 PID 2604 wrote to memory of 2584 2604 $77svchost.exe 69 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
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Views/modifies file attributes 1 TTPs 3 IoCs
pid Process 1776 attrib.exe 1980 attrib.exe 2264 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\74e445436b010306f116973c93656630N.exe"C:\Users\Admin\AppData\Local\Temp\74e445436b010306f116973c93656630N.exe"1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2540 -
C:\Users\Admin\AppData\Local\Temp\WmZWbh4b.exe"C:\Users\Admin\AppData\Local\Temp\WmZWbh4b.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2892 -
C:\Windows\System32\attrib.exe"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Exec"3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:1980
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C:\Windows\System32\attrib.exe"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Exec\$77svchost.exe"3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2264
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C:\Windows\system32\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp47AA.tmp.bat""3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1488 -
C:\Windows\system32\timeout.exetimeout 34⤵
- Delays execution with timeout.exe
PID:2724
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C:\Users\Admin\Exec\$77svchost.exe"C:\Users\Admin\Exec\$77svchost.exe"4⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2604 -
C:\Windows\system32\schtasks.exe"schtasks.exe" /query /TN $77svchost.exe5⤵PID:2584
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C:\Windows\system32\schtasks.exe"schtasks.exe" /Create /SC ONCE /TN "$77svchost.exe" /TR "C:\Users\Admin\Exec\$77svchost.exe \"\$77svchost.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST5⤵
- Scheduled Task/Job: Scheduled Task
PID:2704
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C:\Windows\system32\schtasks.exe"schtasks.exe" /query /TN $77svchost.exe5⤵PID:2492
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit5⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
PID:2592
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc daily /tn "svchost_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:005⤵
- Scheduled Task/Job: Scheduled Task
PID:2496
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C:\Users\Admin\AppData\Local\Temp\Umbral.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"2⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2200 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid3⤵
- Suspicious use of AdjustPrivilegeToken
PID:2740
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C:\Windows\system32\attrib.exe"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"3⤵
- Views/modifies file attributes
PID:1776
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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'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2448
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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 23⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2900
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1068
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2192
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption3⤵
- Suspicious use of AdjustPrivilegeToken
PID:472
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory3⤵PID:1536
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid3⤵PID:3036
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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_IDENTIFIER3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
PID:1988
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name3⤵
- Detects videocard installed
PID:1256
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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" && pause3⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:3008 -
C:\Windows\system32\PING.EXEping localhost4⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
PID:892
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2772
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Hide Artifacts
2Hidden Files and Directories
2Modify Registry
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
40KB
MD547f267290124f530b9c04563b533db83
SHA1fccb81909c612554fce4303daeffc750a71ee44e
SHA256479db498a032418957c1616b13187402d7f626afa32dd4fcf56313d78ec23eeb
SHA512a81b1ca99fec7a536eabc62f57668e46b832e534ccba43f3ab25a9d33d394745d24bad5f72225244f20be5ddcb44529d72efa31b92bc9e03f34e3b9ddb4f9e3a
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Filesize
143B
MD5137eba54676ef9f0467ccd49a8e28104
SHA170e77294f9998ae977d836009bebb7725bbd0b9f
SHA256be91d54d456cd88edfbadc0006192537455f27691f9f5b1e839dcc62a5764940
SHA51239c077504e606aadd61c0c949a18d7e58293d5c8c38be76ec96c8c5578d5bc53c9793efd94bede5d061e23c369b6314f90ccb7cba97dd8f364afa8e3c1f1ec35
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize7KB
MD54b94b1716536903f3839d7160c676139
SHA1d2e0491d6be947db39d01d4fef685c556287d02c
SHA256e2d85247a0c5f2ce8033d2c2595bec27778adb621f268be7e105be22f5387298
SHA5125f28d70d4b42c4a3a3a91e0083d56cbd239e905126aaffa9d6f4ca31f93c9076c2563f1be8b82369efebf09ca0173bb4143fd613213f056b4084355de7cebd9f
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Filesize
229KB
MD562099472f40d33f1caf73e36e866b9e7
SHA19d1e27b780ba14d0e41d366d79b0f42d4a782e7e
SHA256f343ca46350a3c48f888be39bf1247fcab2bcd731889fc16828aac5f681edebc
SHA5123356bd93afdff76dfc995b8bba3fc96d772e371c3ae6f289cbdb58cffef4906a5f8c2755152765c8cc96b5fc61e97186e42eceaa5e8619d15e172441c95f9764