umbral | 9fa6035e3150c3e57724bd3f4f67647ed925c9c9447f00b3df7715d03b6ebf53

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
26-08-2024 19:54

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral.exe
Size

234KB
MD5

18a5e3fd22133b48de0ac3ae4e41c997
SHA1

6664c80cf7567077385cc5f82aba04d525a7a8a9
SHA256

9fa6035e3150c3e57724bd3f4f67647ed925c9c9447f00b3df7715d03b6ebf53
SHA512

c359ef3b9b5736b63e8906f6d35e6fb9b6f286f4fd382f5f445f2a5c9e38673a04f90215349c417c19e67cd9e123925521084167ac2dce0af842d18eb3c070b9
SSDEEP

6144:zloZM+rIkd8g+EtXHkv/iD4VsEnYe5xysXKYZd85Wn+l78e1mUDiM:xoZtL+EP8mEnYe5xysXKYZd85zJiM

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1420-1-0x0000000000F80000-0x0000000000FC0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2092	powershell.exe
2068	powershell.exe
2804	powershell.exe
1920	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
2652	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

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
2652	cmd.exe
2096	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2044	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2096	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1420	Umbral.exe
2092	powershell.exe
2068	powershell.exe
2804	powershell.exe
1976	powershell.exe
1920	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1420	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1892	wmic.exe
Token: SeSecurityPrivilege	1892	wmic.exe
Token: SeTakeOwnershipPrivilege	1892	wmic.exe
Token: SeLoadDriverPrivilege	1892	wmic.exe
Token: SeSystemProfilePrivilege	1892	wmic.exe
Token: SeSystemtimePrivilege	1892	wmic.exe
Token: SeProfSingleProcessPrivilege	1892	wmic.exe
Token: SeIncBasePriorityPrivilege	1892	wmic.exe
Token: SeCreatePagefilePrivilege	1892	wmic.exe
Token: SeBackupPrivilege	1892	wmic.exe
Token: SeRestorePrivilege	1892	wmic.exe
Token: SeShutdownPrivilege	1892	wmic.exe
Token: SeDebugPrivilege	1892	wmic.exe
Token: SeSystemEnvironmentPrivilege	1892	wmic.exe
Token: SeRemoteShutdownPrivilege	1892	wmic.exe
Token: SeUndockPrivilege	1892	wmic.exe
Token: SeManageVolumePrivilege	1892	wmic.exe
Token: 33	1892	wmic.exe
Token: 34	1892	wmic.exe
Token: 35	1892	wmic.exe
Token: SeIncreaseQuotaPrivilege	1892	wmic.exe
Token: SeSecurityPrivilege	1892	wmic.exe
Token: SeTakeOwnershipPrivilege	1892	wmic.exe
Token: SeLoadDriverPrivilege	1892	wmic.exe
Token: SeSystemProfilePrivilege	1892	wmic.exe
Token: SeSystemtimePrivilege	1892	wmic.exe
Token: SeProfSingleProcessPrivilege	1892	wmic.exe
Token: SeIncBasePriorityPrivilege	1892	wmic.exe
Token: SeCreatePagefilePrivilege	1892	wmic.exe
Token: SeBackupPrivilege	1892	wmic.exe
Token: SeRestorePrivilege	1892	wmic.exe
Token: SeShutdownPrivilege	1892	wmic.exe
Token: SeDebugPrivilege	1892	wmic.exe
Token: SeSystemEnvironmentPrivilege	1892	wmic.exe
Token: SeRemoteShutdownPrivilege	1892	wmic.exe
Token: SeUndockPrivilege	1892	wmic.exe
Token: SeManageVolumePrivilege	1892	wmic.exe
Token: 33	1892	wmic.exe
Token: 34	1892	wmic.exe
Token: 35	1892	wmic.exe
Token: SeDebugPrivilege	2092	powershell.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeDebugPrivilege	2804	powershell.exe
Token: SeDebugPrivilege	1976	powershell.exe
Token: SeIncreaseQuotaPrivilege	2684	wmic.exe
Token: SeSecurityPrivilege	2684	wmic.exe
Token: SeTakeOwnershipPrivilege	2684	wmic.exe
Token: SeLoadDriverPrivilege	2684	wmic.exe
Token: SeSystemProfilePrivilege	2684	wmic.exe
Token: SeSystemtimePrivilege	2684	wmic.exe
Token: SeProfSingleProcessPrivilege	2684	wmic.exe
Token: SeIncBasePriorityPrivilege	2684	wmic.exe
Token: SeCreatePagefilePrivilege	2684	wmic.exe
Token: SeBackupPrivilege	2684	wmic.exe
Token: SeRestorePrivilege	2684	wmic.exe
Token: SeShutdownPrivilege	2684	wmic.exe
Token: SeDebugPrivilege	2684	wmic.exe
Token: SeSystemEnvironmentPrivilege	2684	wmic.exe
Token: SeRemoteShutdownPrivilege	2684	wmic.exe
Token: SeUndockPrivilege	2684	wmic.exe
Token: SeManageVolumePrivilege	2684	wmic.exe
Token: 33	2684	wmic.exe
Token: 34	2684	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1420 wrote to memory of 1892	1420	Umbral.exe	30
PID 1420 wrote to memory of 1892	1420	Umbral.exe	30
PID 1420 wrote to memory of 1892	1420	Umbral.exe	30
PID 1420 wrote to memory of 2296	1420	Umbral.exe	33
PID 1420 wrote to memory of 2296	1420	Umbral.exe	33
PID 1420 wrote to memory of 2296	1420	Umbral.exe	33
PID 1420 wrote to memory of 2092	1420	Umbral.exe	35
PID 1420 wrote to memory of 2092	1420	Umbral.exe	35
PID 1420 wrote to memory of 2092	1420	Umbral.exe	35
PID 1420 wrote to memory of 2068	1420	Umbral.exe	37
PID 1420 wrote to memory of 2068	1420	Umbral.exe	37
PID 1420 wrote to memory of 2068	1420	Umbral.exe	37
PID 1420 wrote to memory of 2804	1420	Umbral.exe	39
PID 1420 wrote to memory of 2804	1420	Umbral.exe	39
PID 1420 wrote to memory of 2804	1420	Umbral.exe	39
PID 1420 wrote to memory of 1976	1420	Umbral.exe	41
PID 1420 wrote to memory of 1976	1420	Umbral.exe	41
PID 1420 wrote to memory of 1976	1420	Umbral.exe	41
PID 1420 wrote to memory of 2684	1420	Umbral.exe	43
PID 1420 wrote to memory of 2684	1420	Umbral.exe	43
PID 1420 wrote to memory of 2684	1420	Umbral.exe	43
PID 1420 wrote to memory of 1452	1420	Umbral.exe	46
PID 1420 wrote to memory of 1452	1420	Umbral.exe	46
PID 1420 wrote to memory of 1452	1420	Umbral.exe	46
PID 1420 wrote to memory of 1332	1420	Umbral.exe	48
PID 1420 wrote to memory of 1332	1420	Umbral.exe	48
PID 1420 wrote to memory of 1332	1420	Umbral.exe	48
PID 1420 wrote to memory of 1920	1420	Umbral.exe	50
PID 1420 wrote to memory of 1920	1420	Umbral.exe	50
PID 1420 wrote to memory of 1920	1420	Umbral.exe	50
PID 1420 wrote to memory of 2044	1420	Umbral.exe	52
PID 1420 wrote to memory of 2044	1420	Umbral.exe	52
PID 1420 wrote to memory of 2044	1420	Umbral.exe	52
PID 1420 wrote to memory of 2652	1420	Umbral.exe	54
PID 1420 wrote to memory of 2652	1420	Umbral.exe	54
PID 1420 wrote to memory of 2652	1420	Umbral.exe	54
PID 2652 wrote to memory of 2096	2652	cmd.exe	56
PID 2652 wrote to memory of 2096	2652	cmd.exe	56
PID 2652 wrote to memory of 2096	2652	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2296	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:1420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1892
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2296
- 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:2092
- 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:2068
- 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:2804
- 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:1976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1452
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1332
- 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:1920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2044
- 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:2652
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    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

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
7KB

MD5
66af289c09596382afef122f2705e665

SHA1
4211f40dcf644fff27ab121f01074b645b150505

SHA256
c293a2fe8e1250bb6524dce2f91085e7024e15ed4a553e3a82043356aabe99be

SHA512
2afc10fab12d5686e2f71af2c31204a6e2f276b7da34edf1388498d83601098d713beb2d98d4de84d898f0c518584f5328d7a36853b11b6f62248bbd522ae634

Download Submit
memory/1420-0-0x000007FEF51D3000-0x000007FEF51D4000-memory.dmp

Filesize
4KB

Download
memory/1420-1-0x0000000000F80000-0x0000000000FC0000-memory.dmp

Filesize
256KB

Download
memory/1420-2-0x000007FEF51D0000-0x000007FEF5BBC000-memory.dmp

Filesize
9.9MB

Download
memory/1420-46-0x000007FEF51D0000-0x000007FEF5BBC000-memory.dmp

Filesize
9.9MB

Download
memory/1920-42-0x0000000001D80000-0x0000000001D88000-memory.dmp

Filesize
32KB

Download
memory/2068-14-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2068-15-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download
memory/2092-7-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/2092-8-0x00000000022E0000-0x00000000022E8000-memory.dmp

Filesize
32KB

Download