umbral | f3073b18151ae854112999b803ef10b70447d908a3cb0b2c27e91740a3fb2370

Analysis

max time kernel
81s
max time network
18s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09-11-2024 18:07

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General

Target

Umbral.exe
Size

229KB
MD5

50bc3bab2a3553f7b55fbc5a6fa1275f
SHA1

83f6672fee979dec40ee154519c9cd7d3aa79bb4
SHA256

f3073b18151ae854112999b803ef10b70447d908a3cb0b2c27e91740a3fb2370
SHA512

a0c0b1d7b2e9dae8c1e4315b2002eaf2caddd3639986f053f3874e7e7c715e60d20f4893d0b456d7289503146ace6fde934e1f807b5483ff28a592bfac55d150
SSDEEP

6144:lloZMHrIkd8g+EtXHkv/iD4SZ+lTwk7+iTlwsJOhK28e1mmi:noZIL+EP8SZ+lTwk7+iTlwsJIw

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2956-1-0x0000000000DE0000-0x0000000000E20000-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

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

execution

PowerShell

T1059.001

pid	Process
2892	powershell.exe
2720	powershell.exe
2480	powershell.exe
2836	powershell.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
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
284	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2892	powershell.exe
2720	powershell.exe
2480	powershell.exe
2952	powershell.exe
2836	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2956	Umbral.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	2480	powershell.exe
Token: SeDebugPrivilege	2952	powershell.exe
Token: SeIncreaseQuotaPrivilege	1796	wmic.exe
Token: SeSecurityPrivilege	1796	wmic.exe
Token: SeTakeOwnershipPrivilege	1796	wmic.exe
Token: SeLoadDriverPrivilege	1796	wmic.exe
Token: SeSystemProfilePrivilege	1796	wmic.exe
Token: SeSystemtimePrivilege	1796	wmic.exe
Token: SeProfSingleProcessPrivilege	1796	wmic.exe
Token: SeIncBasePriorityPrivilege	1796	wmic.exe
Token: SeCreatePagefilePrivilege	1796	wmic.exe
Token: SeBackupPrivilege	1796	wmic.exe
Token: SeRestorePrivilege	1796	wmic.exe
Token: SeShutdownPrivilege	1796	wmic.exe
Token: SeDebugPrivilege	1796	wmic.exe
Token: SeSystemEnvironmentPrivilege	1796	wmic.exe
Token: SeRemoteShutdownPrivilege	1796	wmic.exe
Token: SeUndockPrivilege	1796	wmic.exe
Token: SeManageVolumePrivilege	1796	wmic.exe
Token: 33	1796	wmic.exe
Token: 34	1796	wmic.exe
Token: 35	1796	wmic.exe
Token: SeIncreaseQuotaPrivilege	1796	wmic.exe
Token: SeSecurityPrivilege	1796	wmic.exe
Token: SeTakeOwnershipPrivilege	1796	wmic.exe
Token: SeLoadDriverPrivilege	1796	wmic.exe
Token: SeSystemProfilePrivilege	1796	wmic.exe
Token: SeSystemtimePrivilege	1796	wmic.exe
Token: SeProfSingleProcessPrivilege	1796	wmic.exe
Token: SeIncBasePriorityPrivilege	1796	wmic.exe
Token: SeCreatePagefilePrivilege	1796	wmic.exe
Token: SeBackupPrivilege	1796	wmic.exe
Token: SeRestorePrivilege	1796	wmic.exe
Token: SeShutdownPrivilege	1796	wmic.exe
Token: SeDebugPrivilege	1796	wmic.exe
Token: SeSystemEnvironmentPrivilege	1796	wmic.exe
Token: SeRemoteShutdownPrivilege	1796	wmic.exe
Token: SeUndockPrivilege	1796	wmic.exe
Token: SeManageVolumePrivilege	1796	wmic.exe
Token: 33	1796	wmic.exe
Token: 34	1796	wmic.exe
Token: 35	1796	wmic.exe
Token: SeIncreaseQuotaPrivilege	1324	wmic.exe
Token: SeSecurityPrivilege	1324	wmic.exe
Token: SeTakeOwnershipPrivilege	1324	wmic.exe
Token: SeLoadDriverPrivilege	1324	wmic.exe
Token: SeSystemProfilePrivilege	1324	wmic.exe
Token: SeSystemtimePrivilege	1324	wmic.exe
Token: SeProfSingleProcessPrivilege	1324	wmic.exe
Token: SeIncBasePriorityPrivilege	1324	wmic.exe
Token: SeCreatePagefilePrivilege	1324	wmic.exe
Token: SeBackupPrivilege	1324	wmic.exe
Token: SeRestorePrivilege	1324	wmic.exe
Token: SeShutdownPrivilege	1324	wmic.exe
Token: SeDebugPrivilege	1324	wmic.exe
Token: SeSystemEnvironmentPrivilege	1324	wmic.exe
Token: SeRemoteShutdownPrivilege	1324	wmic.exe
Token: SeUndockPrivilege	1324	wmic.exe
Token: SeManageVolumePrivilege	1324	wmic.exe
Token: 33	1324	wmic.exe
Token: 34	1324	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 2892	2956	Umbral.exe	31
PID 2956 wrote to memory of 2892	2956	Umbral.exe	31
PID 2956 wrote to memory of 2892	2956	Umbral.exe	31
PID 2956 wrote to memory of 2720	2956	Umbral.exe	33
PID 2956 wrote to memory of 2720	2956	Umbral.exe	33
PID 2956 wrote to memory of 2720	2956	Umbral.exe	33
PID 2956 wrote to memory of 2480	2956	Umbral.exe	35
PID 2956 wrote to memory of 2480	2956	Umbral.exe	35
PID 2956 wrote to memory of 2480	2956	Umbral.exe	35
PID 2956 wrote to memory of 2952	2956	Umbral.exe	37
PID 2956 wrote to memory of 2952	2956	Umbral.exe	37
PID 2956 wrote to memory of 2952	2956	Umbral.exe	37
PID 2956 wrote to memory of 1796	2956	Umbral.exe	39
PID 2956 wrote to memory of 1796	2956	Umbral.exe	39
PID 2956 wrote to memory of 1796	2956	Umbral.exe	39
PID 2956 wrote to memory of 1324	2956	Umbral.exe	42
PID 2956 wrote to memory of 1324	2956	Umbral.exe	42
PID 2956 wrote to memory of 1324	2956	Umbral.exe	42
PID 2956 wrote to memory of 796	2956	Umbral.exe	44
PID 2956 wrote to memory of 796	2956	Umbral.exe	44
PID 2956 wrote to memory of 796	2956	Umbral.exe	44
PID 2956 wrote to memory of 2836	2956	Umbral.exe	46
PID 2956 wrote to memory of 2836	2956	Umbral.exe	46
PID 2956 wrote to memory of 2836	2956	Umbral.exe	46
PID 2956 wrote to memory of 284	2956	Umbral.exe	48
PID 2956 wrote to memory of 284	2956	Umbral.exe	48
PID 2956 wrote to memory of 284	2956	Umbral.exe	48

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956
- 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:2892
- 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:2720
- 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:2480
- 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:2952
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1796
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1324
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:796
- 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:2836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:284

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
d930f6b56caa4ab2f061c6e1122a3419

SHA1
f80ca3da256e7ae8fccb624721519e5df34ec818

SHA256
d4ef3e80aac850fd8b11b3a7af047dbe9ffa987b2f5dc6df2d9f7afc67d4bfb8

SHA512
f53c5cd2cef62024b90187ebf7e4c12437110ae63e28a42cbd23fc87fb6098545c04576530203b1ee9c71802ccae18a254beb958a21fec2ff41ebad761178ce7

Download Submit
memory/2720-22-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download
memory/2720-21-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/2892-9-0x00000000028F0000-0x00000000028F8000-memory.dmp

Filesize
32KB

Download
memory/2892-8-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2892-11-0x000007FEECB10000-0x000007FEED4AD000-memory.dmp

Filesize
9.6MB

Download
memory/2892-12-0x000007FEECB10000-0x000007FEED4AD000-memory.dmp

Filesize
9.6MB

Download
memory/2892-15-0x000007FEECB10000-0x000007FEED4AD000-memory.dmp

Filesize
9.6MB

Download
memory/2892-14-0x000007FEECB10000-0x000007FEED4AD000-memory.dmp

Filesize
9.6MB

Download
memory/2892-13-0x000007FEECB10000-0x000007FEED4AD000-memory.dmp

Filesize
9.6MB

Download
memory/2892-10-0x000007FEECB10000-0x000007FEED4AD000-memory.dmp

Filesize
9.6MB

Download
memory/2892-7-0x000007FEECDCE000-0x000007FEECDCF000-memory.dmp

Filesize
4KB

Download
memory/2956-0-0x000007FEF5633000-0x000007FEF5634000-memory.dmp

Filesize
4KB

Download
memory/2956-2-0x000007FEF5630000-0x000007FEF601C000-memory.dmp

Filesize
9.9MB

Download
memory/2956-1-0x0000000000DE0000-0x0000000000E20000-memory.dmp

Filesize
256KB

Download
memory/2956-51-0x000007FEF5630000-0x000007FEF601C000-memory.dmp

Filesize
9.9MB

Download