umbral | bd4d72d38d56ab39ea25acd2ce87869f914f352397eae92634e1d8f9f576c8ff

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
18-07-2024 22:29

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General

Target

Umbral.exe
Size

231KB
MD5

64084e155f8e91598f994297efe19cbd
SHA1

83b427e8f3b81d5b5dcc53e361c2eb00518bb2ab
SHA256

bd4d72d38d56ab39ea25acd2ce87869f914f352397eae92634e1d8f9f576c8ff
SHA512

5f0a26d8dd233c653345b9f163c13795f27322f99157271e1aaff948fda2d77d66d2e6c8b7bdc8b8ec5d08b459f1d847724ad6c3a5596d07c6e26bb9f95884de
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4NrcPuMzvEUlwOffuGfOtLBM8e1mqYi:joZtL+EP8NrcPuMzvEUlwOffu+yL8P

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1864-1-0x0000000000C10000-0x0000000000C50000-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
2744	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
1904	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
9	discord.com
10	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
2992	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1628	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1864	Umbral.exe
2744	powershell.exe
2796	powershell.exe
2700	powershell.exe
1604	powershell.exe
1796	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3020	wmic.exe
Token: SeSecurityPrivilege	3020	wmic.exe
Token: SeTakeOwnershipPrivilege	3020	wmic.exe
Token: SeLoadDriverPrivilege	3020	wmic.exe
Token: SeSystemProfilePrivilege	3020	wmic.exe
Token: SeSystemtimePrivilege	3020	wmic.exe
Token: SeProfSingleProcessPrivilege	3020	wmic.exe
Token: SeIncBasePriorityPrivilege	3020	wmic.exe
Token: SeCreatePagefilePrivilege	3020	wmic.exe
Token: SeBackupPrivilege	3020	wmic.exe
Token: SeRestorePrivilege	3020	wmic.exe
Token: SeShutdownPrivilege	3020	wmic.exe
Token: SeDebugPrivilege	3020	wmic.exe
Token: SeSystemEnvironmentPrivilege	3020	wmic.exe
Token: SeRemoteShutdownPrivilege	3020	wmic.exe
Token: SeUndockPrivilege	3020	wmic.exe
Token: SeManageVolumePrivilege	3020	wmic.exe
Token: 33	3020	wmic.exe
Token: 34	3020	wmic.exe
Token: 35	3020	wmic.exe
Token: SeIncreaseQuotaPrivilege	3020	wmic.exe
Token: SeSecurityPrivilege	3020	wmic.exe
Token: SeTakeOwnershipPrivilege	3020	wmic.exe
Token: SeLoadDriverPrivilege	3020	wmic.exe
Token: SeSystemProfilePrivilege	3020	wmic.exe
Token: SeSystemtimePrivilege	3020	wmic.exe
Token: SeProfSingleProcessPrivilege	3020	wmic.exe
Token: SeIncBasePriorityPrivilege	3020	wmic.exe
Token: SeCreatePagefilePrivilege	3020	wmic.exe
Token: SeBackupPrivilege	3020	wmic.exe
Token: SeRestorePrivilege	3020	wmic.exe
Token: SeShutdownPrivilege	3020	wmic.exe
Token: SeDebugPrivilege	3020	wmic.exe
Token: SeSystemEnvironmentPrivilege	3020	wmic.exe
Token: SeRemoteShutdownPrivilege	3020	wmic.exe
Token: SeUndockPrivilege	3020	wmic.exe
Token: SeManageVolumePrivilege	3020	wmic.exe
Token: 33	3020	wmic.exe
Token: 34	3020	wmic.exe
Token: 35	3020	wmic.exe
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	1604	powershell.exe
Token: SeIncreaseQuotaPrivilege	2444	wmic.exe
Token: SeSecurityPrivilege	2444	wmic.exe
Token: SeTakeOwnershipPrivilege	2444	wmic.exe
Token: SeLoadDriverPrivilege	2444	wmic.exe
Token: SeSystemProfilePrivilege	2444	wmic.exe
Token: SeSystemtimePrivilege	2444	wmic.exe
Token: SeProfSingleProcessPrivilege	2444	wmic.exe
Token: SeIncBasePriorityPrivilege	2444	wmic.exe
Token: SeCreatePagefilePrivilege	2444	wmic.exe
Token: SeBackupPrivilege	2444	wmic.exe
Token: SeRestorePrivilege	2444	wmic.exe
Token: SeShutdownPrivilege	2444	wmic.exe
Token: SeDebugPrivilege	2444	wmic.exe
Token: SeSystemEnvironmentPrivilege	2444	wmic.exe
Token: SeRemoteShutdownPrivilege	2444	wmic.exe
Token: SeUndockPrivilege	2444	wmic.exe
Token: SeManageVolumePrivilege	2444	wmic.exe
Token: 33	2444	wmic.exe
Token: 34	2444	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 3020	1864	Umbral.exe	30
PID 1864 wrote to memory of 3020	1864	Umbral.exe	30
PID 1864 wrote to memory of 3020	1864	Umbral.exe	30
PID 1864 wrote to memory of 2632	1864	Umbral.exe	33
PID 1864 wrote to memory of 2632	1864	Umbral.exe	33
PID 1864 wrote to memory of 2632	1864	Umbral.exe	33
PID 1864 wrote to memory of 2744	1864	Umbral.exe	35
PID 1864 wrote to memory of 2744	1864	Umbral.exe	35
PID 1864 wrote to memory of 2744	1864	Umbral.exe	35
PID 1864 wrote to memory of 2796	1864	Umbral.exe	37
PID 1864 wrote to memory of 2796	1864	Umbral.exe	37
PID 1864 wrote to memory of 2796	1864	Umbral.exe	37
PID 1864 wrote to memory of 2700	1864	Umbral.exe	40
PID 1864 wrote to memory of 2700	1864	Umbral.exe	40
PID 1864 wrote to memory of 2700	1864	Umbral.exe	40
PID 1864 wrote to memory of 1604	1864	Umbral.exe	42
PID 1864 wrote to memory of 1604	1864	Umbral.exe	42
PID 1864 wrote to memory of 1604	1864	Umbral.exe	42
PID 1864 wrote to memory of 2444	1864	Umbral.exe	44
PID 1864 wrote to memory of 2444	1864	Umbral.exe	44
PID 1864 wrote to memory of 2444	1864	Umbral.exe	44
PID 1864 wrote to memory of 1848	1864	Umbral.exe	46
PID 1864 wrote to memory of 1848	1864	Umbral.exe	46
PID 1864 wrote to memory of 1848	1864	Umbral.exe	46
PID 1864 wrote to memory of 1908	1864	Umbral.exe	48
PID 1864 wrote to memory of 1908	1864	Umbral.exe	48
PID 1864 wrote to memory of 1908	1864	Umbral.exe	48
PID 1864 wrote to memory of 1796	1864	Umbral.exe	50
PID 1864 wrote to memory of 1796	1864	Umbral.exe	50
PID 1864 wrote to memory of 1796	1864	Umbral.exe	50
PID 1864 wrote to memory of 2992	1864	Umbral.exe	52
PID 1864 wrote to memory of 2992	1864	Umbral.exe	52
PID 1864 wrote to memory of 2992	1864	Umbral.exe	52
PID 1864 wrote to memory of 1904	1864	Umbral.exe	54
PID 1864 wrote to memory of 1904	1864	Umbral.exe	54
PID 1864 wrote to memory of 1904	1864	Umbral.exe	54
PID 1904 wrote to memory of 1628	1904	cmd.exe	56
PID 1904 wrote to memory of 1628	1904	cmd.exe	56
PID 1904 wrote to memory of 1628	1904	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2632	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3020
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2632
- 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:2744
- 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:2796
- 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:2700
- 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:1604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2444
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1908
- 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:1796
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2992
- 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:1904
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1628

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

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Downloads

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

Filesize
7KB

MD5
d793e0c4ac69b413154d3a851705adb1

SHA1
b996e73e893ce9960ed1509684932cff6bc4e79a

SHA256
d27be19ccb761bb08d127d8df6b3d292a2c421b7c4b0f636627e24d28440bbc4

SHA512
1db47743e32b7fa14fea08dc9b08d0a3c6edeef26418662215ae7be011ecb548a5a8e46af19661156dc2c569b473c721ddf2df5beaa35126f831a6c7aa3ca1d5

Download Submit
memory/1796-44-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/1864-0-0x000007FEF5A23000-0x000007FEF5A24000-memory.dmp

Filesize
4KB

Download
memory/1864-1-0x0000000000C10000-0x0000000000C50000-memory.dmp

Filesize
256KB

Download
memory/1864-2-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/1864-48-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-7-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2744-8-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/2796-14-0x000000001B720000-0x000000001BA02000-memory.dmp

Filesize
2.9MB

Download
memory/2796-15-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download