umbral | 256aa419764dc6cf6fef1a4bbe7a918c207c48515e9e13d18881a69b326c79f0

Resubmissions

26-07-2024 22:22

240726-2ap5aaycqq 10

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
26-07-2024 22:22

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General

Target

Umbral.exe
Size

229KB
MD5

7b8f7224e44d39c521160c3b33e22e98
SHA1

a8ab775e550aef4aa3b2f485116bcc245c7ccb48
SHA256

256aa419764dc6cf6fef1a4bbe7a918c207c48515e9e13d18881a69b326c79f0
SHA512

c11c922edb6d3aa634fd68dc59a86463fd29b27eead95864efc003fcbb226610854f3acceff7b580fb96443952aa68696f87ea4004e01af96eca570a75359859
SSDEEP

6144:tloZM9rIkd8g+EtXHkv/iD4u5PpSQPL42BECDja/yb8e1mUZJi:voZmL+EP8u5PpSQPL42BECDjamp+

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2692-1-0x0000000000330000-0x0000000000370000-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
2808	powershell.exe
3060	powershell.exe
2780	powershell.exe
2908	powershell.exe

Deletes itself 1 IoCs

pid	Process
2240	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
2240	cmd.exe
1688	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2704	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1688	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2692	Umbral.exe
2808	powershell.exe
3060	powershell.exe
2780	powershell.exe
2668	powershell.exe
2908	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2788	wmic.exe
Token: SeSecurityPrivilege	2788	wmic.exe
Token: SeTakeOwnershipPrivilege	2788	wmic.exe
Token: SeLoadDriverPrivilege	2788	wmic.exe
Token: SeSystemProfilePrivilege	2788	wmic.exe
Token: SeSystemtimePrivilege	2788	wmic.exe
Token: SeProfSingleProcessPrivilege	2788	wmic.exe
Token: SeIncBasePriorityPrivilege	2788	wmic.exe
Token: SeCreatePagefilePrivilege	2788	wmic.exe
Token: SeBackupPrivilege	2788	wmic.exe
Token: SeRestorePrivilege	2788	wmic.exe
Token: SeShutdownPrivilege	2788	wmic.exe
Token: SeDebugPrivilege	2788	wmic.exe
Token: SeSystemEnvironmentPrivilege	2788	wmic.exe
Token: SeRemoteShutdownPrivilege	2788	wmic.exe
Token: SeUndockPrivilege	2788	wmic.exe
Token: SeManageVolumePrivilege	2788	wmic.exe
Token: 33	2788	wmic.exe
Token: 34	2788	wmic.exe
Token: 35	2788	wmic.exe
Token: SeIncreaseQuotaPrivilege	2788	wmic.exe
Token: SeSecurityPrivilege	2788	wmic.exe
Token: SeTakeOwnershipPrivilege	2788	wmic.exe
Token: SeLoadDriverPrivilege	2788	wmic.exe
Token: SeSystemProfilePrivilege	2788	wmic.exe
Token: SeSystemtimePrivilege	2788	wmic.exe
Token: SeProfSingleProcessPrivilege	2788	wmic.exe
Token: SeIncBasePriorityPrivilege	2788	wmic.exe
Token: SeCreatePagefilePrivilege	2788	wmic.exe
Token: SeBackupPrivilege	2788	wmic.exe
Token: SeRestorePrivilege	2788	wmic.exe
Token: SeShutdownPrivilege	2788	wmic.exe
Token: SeDebugPrivilege	2788	wmic.exe
Token: SeSystemEnvironmentPrivilege	2788	wmic.exe
Token: SeRemoteShutdownPrivilege	2788	wmic.exe
Token: SeUndockPrivilege	2788	wmic.exe
Token: SeManageVolumePrivilege	2788	wmic.exe
Token: 33	2788	wmic.exe
Token: 34	2788	wmic.exe
Token: 35	2788	wmic.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	3060	powershell.exe
Token: SeDebugPrivilege	2780	powershell.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeIncreaseQuotaPrivilege	1852	wmic.exe
Token: SeSecurityPrivilege	1852	wmic.exe
Token: SeTakeOwnershipPrivilege	1852	wmic.exe
Token: SeLoadDriverPrivilege	1852	wmic.exe
Token: SeSystemProfilePrivilege	1852	wmic.exe
Token: SeSystemtimePrivilege	1852	wmic.exe
Token: SeProfSingleProcessPrivilege	1852	wmic.exe
Token: SeIncBasePriorityPrivilege	1852	wmic.exe
Token: SeCreatePagefilePrivilege	1852	wmic.exe
Token: SeBackupPrivilege	1852	wmic.exe
Token: SeRestorePrivilege	1852	wmic.exe
Token: SeShutdownPrivilege	1852	wmic.exe
Token: SeDebugPrivilege	1852	wmic.exe
Token: SeSystemEnvironmentPrivilege	1852	wmic.exe
Token: SeRemoteShutdownPrivilege	1852	wmic.exe
Token: SeUndockPrivilege	1852	wmic.exe
Token: SeManageVolumePrivilege	1852	wmic.exe
Token: 33	1852	wmic.exe
Token: 34	1852	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 2788	2692	Umbral.exe	31
PID 2692 wrote to memory of 2788	2692	Umbral.exe	31
PID 2692 wrote to memory of 2788	2692	Umbral.exe	31
PID 2692 wrote to memory of 2864	2692	Umbral.exe	34
PID 2692 wrote to memory of 2864	2692	Umbral.exe	34
PID 2692 wrote to memory of 2864	2692	Umbral.exe	34
PID 2692 wrote to memory of 2808	2692	Umbral.exe	36
PID 2692 wrote to memory of 2808	2692	Umbral.exe	36
PID 2692 wrote to memory of 2808	2692	Umbral.exe	36
PID 2692 wrote to memory of 3060	2692	Umbral.exe	38
PID 2692 wrote to memory of 3060	2692	Umbral.exe	38
PID 2692 wrote to memory of 3060	2692	Umbral.exe	38
PID 2692 wrote to memory of 2780	2692	Umbral.exe	40
PID 2692 wrote to memory of 2780	2692	Umbral.exe	40
PID 2692 wrote to memory of 2780	2692	Umbral.exe	40
PID 2692 wrote to memory of 2668	2692	Umbral.exe	42
PID 2692 wrote to memory of 2668	2692	Umbral.exe	42
PID 2692 wrote to memory of 2668	2692	Umbral.exe	42
PID 2692 wrote to memory of 1852	2692	Umbral.exe	44
PID 2692 wrote to memory of 1852	2692	Umbral.exe	44
PID 2692 wrote to memory of 1852	2692	Umbral.exe	44
PID 2692 wrote to memory of 1736	2692	Umbral.exe	46
PID 2692 wrote to memory of 1736	2692	Umbral.exe	46
PID 2692 wrote to memory of 1736	2692	Umbral.exe	46
PID 2692 wrote to memory of 1556	2692	Umbral.exe	48
PID 2692 wrote to memory of 1556	2692	Umbral.exe	48
PID 2692 wrote to memory of 1556	2692	Umbral.exe	48
PID 2692 wrote to memory of 2908	2692	Umbral.exe	50
PID 2692 wrote to memory of 2908	2692	Umbral.exe	50
PID 2692 wrote to memory of 2908	2692	Umbral.exe	50
PID 2692 wrote to memory of 2704	2692	Umbral.exe	52
PID 2692 wrote to memory of 2704	2692	Umbral.exe	52
PID 2692 wrote to memory of 2704	2692	Umbral.exe	52
PID 2692 wrote to memory of 2240	2692	Umbral.exe	54
PID 2692 wrote to memory of 2240	2692	Umbral.exe	54
PID 2692 wrote to memory of 2240	2692	Umbral.exe	54
PID 2240 wrote to memory of 1688	2240	cmd.exe	56
PID 2240 wrote to memory of 1688	2240	cmd.exe	56
PID 2240 wrote to memory of 1688	2240	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2864	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2788
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2864
- 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:2808
- 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:3060
- 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:2780
- 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:2668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1852
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1736
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1556
- 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:2908
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2704
- 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:2240
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1688

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
38a86b053611ee177ef02d40c73ed6d8

SHA1
d1274d652b50d0183f37879a4a3e54ff443e2613

SHA256
c651fbb099c96c53999a201997b28ec746ff8ac47c62b289407d0de7ccc921dd

SHA512
c9cd5a3668832e0193f48e4da5da32df3807c89c0aa6e8d5b58112e0c0f087af5a0481c32373b9367b45200d80755e630ac156d353d6025cc8b2ddd3e0c81d87

Download Submit
memory/2692-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2692-1-0x0000000000330000-0x0000000000370000-memory.dmp

Filesize
256KB

Download
memory/2692-2-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2692-46-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2808-7-0x000000001B800000-0x000000001BAE2000-memory.dmp

Filesize
2.9MB

Download
memory/2808-8-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download
memory/2908-42-0x00000000020F0000-0x00000000020F8000-memory.dmp

Filesize
32KB

Download
memory/3060-14-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/3060-15-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download