umbral | 2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05-06-2024 08:16

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General

Target

Umbral.exe
Size

227KB
MD5

53681862212e052e3c6b3e9ca9594428
SHA1

f89c700368b19d182062f673f9b51199e08c47cc
SHA256

2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2
SHA512

2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2192-1-0x0000000000350000-0x0000000000390000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer 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.

execution

PowerShell

T1059.001

pid	Process
2668	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.exe

Deletes itself 1 IoCs

pid	Process
2044	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1624	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2108	PING.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2096	vlc.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2668	powershell.exe
2688	powershell.exe
1156	powershell.exe
2908	powershell.exe
2748	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2096	vlc.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2192	Umbral.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	1156	powershell.exe
Token: SeDebugPrivilege	2908	powershell.exe
Token: SeIncreaseQuotaPrivilege	1656	wmic.exe
Token: SeSecurityPrivilege	1656	wmic.exe
Token: SeTakeOwnershipPrivilege	1656	wmic.exe
Token: SeLoadDriverPrivilege	1656	wmic.exe
Token: SeSystemProfilePrivilege	1656	wmic.exe
Token: SeSystemtimePrivilege	1656	wmic.exe
Token: SeProfSingleProcessPrivilege	1656	wmic.exe
Token: SeIncBasePriorityPrivilege	1656	wmic.exe
Token: SeCreatePagefilePrivilege	1656	wmic.exe
Token: SeBackupPrivilege	1656	wmic.exe
Token: SeRestorePrivilege	1656	wmic.exe
Token: SeShutdownPrivilege	1656	wmic.exe
Token: SeDebugPrivilege	1656	wmic.exe
Token: SeSystemEnvironmentPrivilege	1656	wmic.exe
Token: SeRemoteShutdownPrivilege	1656	wmic.exe
Token: SeUndockPrivilege	1656	wmic.exe
Token: SeManageVolumePrivilege	1656	wmic.exe
Token: 33	1656	wmic.exe
Token: 34	1656	wmic.exe
Token: 35	1656	wmic.exe
Token: SeIncreaseQuotaPrivilege	1656	wmic.exe
Token: SeSecurityPrivilege	1656	wmic.exe
Token: SeTakeOwnershipPrivilege	1656	wmic.exe
Token: SeLoadDriverPrivilege	1656	wmic.exe
Token: SeSystemProfilePrivilege	1656	wmic.exe
Token: SeSystemtimePrivilege	1656	wmic.exe
Token: SeProfSingleProcessPrivilege	1656	wmic.exe
Token: SeIncBasePriorityPrivilege	1656	wmic.exe
Token: SeCreatePagefilePrivilege	1656	wmic.exe
Token: SeBackupPrivilege	1656	wmic.exe
Token: SeRestorePrivilege	1656	wmic.exe
Token: SeShutdownPrivilege	1656	wmic.exe
Token: SeDebugPrivilege	1656	wmic.exe
Token: SeSystemEnvironmentPrivilege	1656	wmic.exe
Token: SeRemoteShutdownPrivilege	1656	wmic.exe
Token: SeUndockPrivilege	1656	wmic.exe
Token: SeManageVolumePrivilege	1656	wmic.exe
Token: 33	1656	wmic.exe
Token: 34	1656	wmic.exe
Token: 35	1656	wmic.exe
Token: SeIncreaseQuotaPrivilege	1084	wmic.exe
Token: SeSecurityPrivilege	1084	wmic.exe
Token: SeTakeOwnershipPrivilege	1084	wmic.exe
Token: SeLoadDriverPrivilege	1084	wmic.exe
Token: SeSystemProfilePrivilege	1084	wmic.exe
Token: SeSystemtimePrivilege	1084	wmic.exe
Token: SeProfSingleProcessPrivilege	1084	wmic.exe
Token: SeIncBasePriorityPrivilege	1084	wmic.exe
Token: SeCreatePagefilePrivilege	1084	wmic.exe
Token: SeBackupPrivilege	1084	wmic.exe
Token: SeRestorePrivilege	1084	wmic.exe
Token: SeShutdownPrivilege	1084	wmic.exe
Token: SeDebugPrivilege	1084	wmic.exe
Token: SeSystemEnvironmentPrivilege	1084	wmic.exe
Token: SeRemoteShutdownPrivilege	1084	wmic.exe
Token: SeUndockPrivilege	1084	wmic.exe
Token: SeManageVolumePrivilege	1084	wmic.exe
Token: 33	1084	wmic.exe
Token: 34	1084	wmic.exe

Suspicious use of FindShellTrayWindow 11 IoCs

pid	Process
2692	dw20.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe

Suspicious use of SendNotifyMessage 9 IoCs

pid	Process
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe
2096	vlc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2096	vlc.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 2544	2192	Umbral.exe	28
PID 2192 wrote to memory of 2544	2192	Umbral.exe	28
PID 2192 wrote to memory of 2544	2192	Umbral.exe	28
PID 2192 wrote to memory of 2668	2192	Umbral.exe	30
PID 2192 wrote to memory of 2668	2192	Umbral.exe	30
PID 2192 wrote to memory of 2668	2192	Umbral.exe	30
PID 2668 wrote to memory of 2692	2668	powershell.exe	32
PID 2668 wrote to memory of 2692	2668	powershell.exe	32
PID 2668 wrote to memory of 2692	2668	powershell.exe	32
PID 2192 wrote to memory of 2688	2192	Umbral.exe	33
PID 2192 wrote to memory of 2688	2192	Umbral.exe	33
PID 2192 wrote to memory of 2688	2192	Umbral.exe	33
PID 2192 wrote to memory of 1156	2192	Umbral.exe	35
PID 2192 wrote to memory of 1156	2192	Umbral.exe	35
PID 2192 wrote to memory of 1156	2192	Umbral.exe	35
PID 2192 wrote to memory of 2908	2192	Umbral.exe	37
PID 2192 wrote to memory of 2908	2192	Umbral.exe	37
PID 2192 wrote to memory of 2908	2192	Umbral.exe	37
PID 2192 wrote to memory of 1656	2192	Umbral.exe	39
PID 2192 wrote to memory of 1656	2192	Umbral.exe	39
PID 2192 wrote to memory of 1656	2192	Umbral.exe	39
PID 2192 wrote to memory of 1084	2192	Umbral.exe	42
PID 2192 wrote to memory of 1084	2192	Umbral.exe	42
PID 2192 wrote to memory of 1084	2192	Umbral.exe	42
PID 2192 wrote to memory of 268	2192	Umbral.exe	44
PID 2192 wrote to memory of 268	2192	Umbral.exe	44
PID 2192 wrote to memory of 268	2192	Umbral.exe	44
PID 2192 wrote to memory of 2748	2192	Umbral.exe	46
PID 2192 wrote to memory of 2748	2192	Umbral.exe	46
PID 2192 wrote to memory of 2748	2192	Umbral.exe	46
PID 2192 wrote to memory of 1624	2192	Umbral.exe	48
PID 2192 wrote to memory of 1624	2192	Umbral.exe	48
PID 2192 wrote to memory of 1624	2192	Umbral.exe	48
PID 2192 wrote to memory of 2044	2192	Umbral.exe	50
PID 2192 wrote to memory of 2044	2192	Umbral.exe	50
PID 2192 wrote to memory of 2044	2192	Umbral.exe	50
PID 2044 wrote to memory of 2108	2044	cmd.exe	52
PID 2044 wrote to memory of 2108	2044	cmd.exe	52
PID 2044 wrote to memory of 2108	2044	cmd.exe	52

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2544	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2192
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2544
- 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
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
    dw20.exe -x -s 788
    3⤵
    - Suspicious use of FindShellTrayWindow
    PID:2692
- 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 2
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2688
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1156
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2908
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1084
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:268
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1624
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2044
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2108

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" C:\Users\Admin\Desktop\ConvertFromWait.dwg
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:2096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
61ea07530f94e32f0cd23e6dea548860

SHA1
9bae2fac4bbb49b8549aaf3fcdf32df5ab0e349a

SHA256
70593ff7dee8225c4b268fa34dac8c63a5e8dc5d2e2d393697eef5c8b712b87a

SHA512
5b241aae419e4f773ced30ddc109f16134f15585ea29e79f8c7004ab287b6de3f80ffe32492cc01088060d7a99e8020b7899acb6ebf2e8370908546105922259

Download Submit
memory/2096-69-0x000007FEF4DD0000-0x000007FEF5E7B000-memory.dmp

Filesize
16.7MB

Download
memory/2096-68-0x000007FEF6080000-0x000007FEF6334000-memory.dmp

Filesize
2.7MB

Download
memory/2096-66-0x000000013F340000-0x000000013F438000-memory.dmp

Filesize
992KB

Download
memory/2096-67-0x000007FEF6E10000-0x000007FEF6E44000-memory.dmp

Filesize
208KB

Download
memory/2192-0-0x000007FEF5953000-0x000007FEF5954000-memory.dmp

Filesize
4KB

Download
memory/2192-1-0x0000000000350000-0x0000000000390000-memory.dmp

Filesize
256KB

Download
memory/2192-2-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-53-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download
memory/2668-14-0x000007FEEDFB0000-0x000007FEEE94D000-memory.dmp

Filesize
9.6MB

Download
memory/2668-13-0x000007FEEDFB0000-0x000007FEEE94D000-memory.dmp

Filesize
9.6MB

Download
memory/2668-11-0x000007FEEDFB0000-0x000007FEEE94D000-memory.dmp

Filesize
9.6MB

Download
memory/2668-12-0x000007FEEDFB0000-0x000007FEEE94D000-memory.dmp

Filesize
9.6MB

Download
memory/2668-10-0x000007FEEDFB0000-0x000007FEEE94D000-memory.dmp

Filesize
9.6MB

Download
memory/2668-9-0x00000000023B0000-0x00000000023B8000-memory.dmp

Filesize
32KB

Download
memory/2668-8-0x000000001B810000-0x000000001BAF2000-memory.dmp

Filesize
2.9MB

Download
memory/2668-7-0x000007FEEE26E000-0x000007FEEE26F000-memory.dmp

Filesize
4KB

Download
memory/2688-20-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/2688-21-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2748-49-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download