umbral | e14be40bad2e07456140fee37d8ca380811886c1c89b0b6e21e8b0f2a33ed663

Analysis

max time kernel
117s
max time network
120s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 12:57

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General

Target

Umbral.exe
Size

229KB
MD5

6f99ad653049306925da44b34fd12011
SHA1

df5d265397a6895efa77bed1478e79784cba7954
SHA256

e14be40bad2e07456140fee37d8ca380811886c1c89b0b6e21e8b0f2a33ed663
SHA512

89c9c171f1684cab8bd55b971cd69b9370f49d7da743f848b99d68523b89e2810ab033c4f26d539240d185186f72549bfb422b9c65cd7cf5c00f781693b569b8
SSDEEP

6144:FloZM+rIkd8g+EtXHkv/iD4YD5JR/k4XRG/BcoN2Nb8e1mFi:HoZtL+EP8YD5JR/k4XRG/BcoNW/

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2252-1-0x0000000001060000-0x00000000010A0000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2604	powershell.exe
2448	powershell.exe
2460	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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

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

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2252	Umbral.exe
2604	powershell.exe
2448	powershell.exe
2460	powershell.exe
2964	powershell.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2932	wmic.exe
Token: SeSecurityPrivilege	2932	wmic.exe
Token: SeTakeOwnershipPrivilege	2932	wmic.exe
Token: SeLoadDriverPrivilege	2932	wmic.exe
Token: SeSystemProfilePrivilege	2932	wmic.exe
Token: SeSystemtimePrivilege	2932	wmic.exe
Token: SeProfSingleProcessPrivilege	2932	wmic.exe
Token: SeIncBasePriorityPrivilege	2932	wmic.exe
Token: SeCreatePagefilePrivilege	2932	wmic.exe
Token: SeBackupPrivilege	2932	wmic.exe
Token: SeRestorePrivilege	2932	wmic.exe
Token: SeShutdownPrivilege	2932	wmic.exe
Token: SeDebugPrivilege	2932	wmic.exe
Token: SeSystemEnvironmentPrivilege	2932	wmic.exe
Token: SeRemoteShutdownPrivilege	2932	wmic.exe
Token: SeUndockPrivilege	2932	wmic.exe
Token: SeManageVolumePrivilege	2932	wmic.exe
Token: 33	2932	wmic.exe
Token: 34	2932	wmic.exe
Token: 35	2932	wmic.exe
Token: SeIncreaseQuotaPrivilege	2932	wmic.exe
Token: SeSecurityPrivilege	2932	wmic.exe
Token: SeTakeOwnershipPrivilege	2932	wmic.exe
Token: SeLoadDriverPrivilege	2932	wmic.exe
Token: SeSystemProfilePrivilege	2932	wmic.exe
Token: SeSystemtimePrivilege	2932	wmic.exe
Token: SeProfSingleProcessPrivilege	2932	wmic.exe
Token: SeIncBasePriorityPrivilege	2932	wmic.exe
Token: SeCreatePagefilePrivilege	2932	wmic.exe
Token: SeBackupPrivilege	2932	wmic.exe
Token: SeRestorePrivilege	2932	wmic.exe
Token: SeShutdownPrivilege	2932	wmic.exe
Token: SeDebugPrivilege	2932	wmic.exe
Token: SeSystemEnvironmentPrivilege	2932	wmic.exe
Token: SeRemoteShutdownPrivilege	2932	wmic.exe
Token: SeUndockPrivilege	2932	wmic.exe
Token: SeManageVolumePrivilege	2932	wmic.exe
Token: 33	2932	wmic.exe
Token: 34	2932	wmic.exe
Token: 35	2932	wmic.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	2448	powershell.exe
Token: SeDebugPrivilege	2460	powershell.exe
Token: SeDebugPrivilege	2964	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2932	2252	Umbral.exe	30
PID 2252 wrote to memory of 2932	2252	Umbral.exe	30
PID 2252 wrote to memory of 2932	2252	Umbral.exe	30
PID 2252 wrote to memory of 2656	2252	Umbral.exe	33
PID 2252 wrote to memory of 2656	2252	Umbral.exe	33
PID 2252 wrote to memory of 2656	2252	Umbral.exe	33
PID 2252 wrote to memory of 2604	2252	Umbral.exe	35
PID 2252 wrote to memory of 2604	2252	Umbral.exe	35
PID 2252 wrote to memory of 2604	2252	Umbral.exe	35
PID 2252 wrote to memory of 2448	2252	Umbral.exe	37
PID 2252 wrote to memory of 2448	2252	Umbral.exe	37
PID 2252 wrote to memory of 2448	2252	Umbral.exe	37
PID 2252 wrote to memory of 2460	2252	Umbral.exe	39
PID 2252 wrote to memory of 2460	2252	Umbral.exe	39
PID 2252 wrote to memory of 2460	2252	Umbral.exe	39
PID 2252 wrote to memory of 2964	2252	Umbral.exe	41
PID 2252 wrote to memory of 2964	2252	Umbral.exe	41
PID 2252 wrote to memory of 2964	2252	Umbral.exe	41

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2656	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:2252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2932
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2656
- 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:2604
- 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:2448
- 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:2460
- 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:2964

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

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\YXT2RFSPLGW2RQFWR83L.temp

Filesize
7KB

MD5
ecd1faa8e1db9dd936ad1903b5a49003

SHA1
9862df9f23e35bad161e9354588fea0f0a59ba34

SHA256
e6880a34b0aee8ad43c50fa7d6060a93a5bc277870df1aed84cbcfa54790e519

SHA512
36e1927df7db269fefd0380613c8bce9c5961872289f7e3c03f59da9e0932ae5ad74f242a573c5ffcdd7338bec524a0c7df4b863a80d8d1e28475ebf4fb13ad4

Download Submit
memory/2252-0-0x000007FEF5823000-0x000007FEF5824000-memory.dmp

Filesize
4KB

Download
memory/2252-1-0x0000000001060000-0x00000000010A0000-memory.dmp

Filesize
256KB

Download
memory/2252-2-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-31-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download
memory/2448-14-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2448-15-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2604-7-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2604-8-0x00000000027F0000-0x00000000027F8000-memory.dmp

Filesize
32KB

Download