umbral | b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-09-2024 02:11

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General

Target

b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe
Size

229KB
MD5

83b81dda82a62350b52ee97a12d3163a
SHA1

3e7c9d5eda676771071fa77ce8f357b0c32673fa
SHA256

b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf
SHA512

e0d0d47479b19287dbb731b0025c458623fa17e77d506756a7e90289abf0c04faa5e655bd2f521ead68d3c8530cb4ecaf1cb1c48e1fe2e03759affe8c0c4ca04
SSDEEP

6144:lloZM9fsXtioRkts/cnnK6cMlxDKxX8il927De8NhoREb8e1muoi:noZXtlRk83MlxDKxX8il927De8NhoOJ

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2300-1-0x0000000001030000-0x0000000001070000-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
2752	powershell.exe
2456	powershell.exe
1964	powershell.exe
1524	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.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

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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2468	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2752	powershell.exe
2456	powershell.exe
1964	powershell.exe
2128	powershell.exe
1524	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	1964	powershell.exe
Token: SeDebugPrivilege	2128	powershell.exe
Token: SeIncreaseQuotaPrivilege	1264	wmic.exe
Token: SeSecurityPrivilege	1264	wmic.exe
Token: SeTakeOwnershipPrivilege	1264	wmic.exe
Token: SeLoadDriverPrivilege	1264	wmic.exe
Token: SeSystemProfilePrivilege	1264	wmic.exe
Token: SeSystemtimePrivilege	1264	wmic.exe
Token: SeProfSingleProcessPrivilege	1264	wmic.exe
Token: SeIncBasePriorityPrivilege	1264	wmic.exe
Token: SeCreatePagefilePrivilege	1264	wmic.exe
Token: SeBackupPrivilege	1264	wmic.exe
Token: SeRestorePrivilege	1264	wmic.exe
Token: SeShutdownPrivilege	1264	wmic.exe
Token: SeDebugPrivilege	1264	wmic.exe
Token: SeSystemEnvironmentPrivilege	1264	wmic.exe
Token: SeRemoteShutdownPrivilege	1264	wmic.exe
Token: SeUndockPrivilege	1264	wmic.exe
Token: SeManageVolumePrivilege	1264	wmic.exe
Token: 33	1264	wmic.exe
Token: 34	1264	wmic.exe
Token: 35	1264	wmic.exe
Token: SeIncreaseQuotaPrivilege	1264	wmic.exe
Token: SeSecurityPrivilege	1264	wmic.exe
Token: SeTakeOwnershipPrivilege	1264	wmic.exe
Token: SeLoadDriverPrivilege	1264	wmic.exe
Token: SeSystemProfilePrivilege	1264	wmic.exe
Token: SeSystemtimePrivilege	1264	wmic.exe
Token: SeProfSingleProcessPrivilege	1264	wmic.exe
Token: SeIncBasePriorityPrivilege	1264	wmic.exe
Token: SeCreatePagefilePrivilege	1264	wmic.exe
Token: SeBackupPrivilege	1264	wmic.exe
Token: SeRestorePrivilege	1264	wmic.exe
Token: SeShutdownPrivilege	1264	wmic.exe
Token: SeDebugPrivilege	1264	wmic.exe
Token: SeSystemEnvironmentPrivilege	1264	wmic.exe
Token: SeRemoteShutdownPrivilege	1264	wmic.exe
Token: SeUndockPrivilege	1264	wmic.exe
Token: SeManageVolumePrivilege	1264	wmic.exe
Token: 33	1264	wmic.exe
Token: 34	1264	wmic.exe
Token: 35	1264	wmic.exe
Token: SeIncreaseQuotaPrivilege	2656	wmic.exe
Token: SeSecurityPrivilege	2656	wmic.exe
Token: SeTakeOwnershipPrivilege	2656	wmic.exe
Token: SeLoadDriverPrivilege	2656	wmic.exe
Token: SeSystemProfilePrivilege	2656	wmic.exe
Token: SeSystemtimePrivilege	2656	wmic.exe
Token: SeProfSingleProcessPrivilege	2656	wmic.exe
Token: SeIncBasePriorityPrivilege	2656	wmic.exe
Token: SeCreatePagefilePrivilege	2656	wmic.exe
Token: SeBackupPrivilege	2656	wmic.exe
Token: SeRestorePrivilege	2656	wmic.exe
Token: SeShutdownPrivilege	2656	wmic.exe
Token: SeDebugPrivilege	2656	wmic.exe
Token: SeSystemEnvironmentPrivilege	2656	wmic.exe
Token: SeRemoteShutdownPrivilege	2656	wmic.exe
Token: SeUndockPrivilege	2656	wmic.exe
Token: SeManageVolumePrivilege	2656	wmic.exe
Token: 33	2656	wmic.exe
Token: 34	2656	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2752	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	30
PID 2300 wrote to memory of 2752	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	30
PID 2300 wrote to memory of 2752	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	30
PID 2300 wrote to memory of 2456	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	32
PID 2300 wrote to memory of 2456	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	32
PID 2300 wrote to memory of 2456	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	32
PID 2300 wrote to memory of 1964	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	34
PID 2300 wrote to memory of 1964	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	34
PID 2300 wrote to memory of 1964	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	34
PID 2300 wrote to memory of 2128	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	36
PID 2300 wrote to memory of 2128	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	36
PID 2300 wrote to memory of 2128	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	36
PID 2300 wrote to memory of 1264	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	38
PID 2300 wrote to memory of 1264	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	38
PID 2300 wrote to memory of 1264	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	38
PID 2300 wrote to memory of 2656	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	41
PID 2300 wrote to memory of 2656	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	41
PID 2300 wrote to memory of 2656	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	41
PID 2300 wrote to memory of 1312	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	43
PID 2300 wrote to memory of 1312	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	43
PID 2300 wrote to memory of 1312	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	43
PID 2300 wrote to memory of 1524	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	45
PID 2300 wrote to memory of 1524	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	45
PID 2300 wrote to memory of 1524	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	45
PID 2300 wrote to memory of 2468	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	47
PID 2300 wrote to memory of 2468	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	47
PID 2300 wrote to memory of 2468	2300	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	47

C:\Users\Admin\AppData\Local\Temp\b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe
"C:\Users\Admin\AppData\Local\Temp\b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- 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:2456
- 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:1964
- 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:2128
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1264
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1312
- 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:1524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2468

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

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
4a182da9fa74c1e42af5dd2251526cf6

SHA1
8cdcc8422628bc3e8e4b5fd92501ea56c86213e2

SHA256
248a1a68af4d7fb90bd578fbcc4776b89bccfc4dfcce174f9e021144ed31c601

SHA512
ee9f5a2f53979a08e0a6c2c11d015efe9f669eeeb3ab8c6839220bc087ebbb7aa8df15b1bcf9f4fbf0c3c4320da5717d6d4f15b5e1f8bc48fdc74773ac2de550

Download Submit
memory/2300-1-0x0000000001030000-0x0000000001070000-memory.dmp

Filesize
256KB

Download
memory/2300-2-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2300-54-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2300-0-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2456-22-0x00000000027A0000-0x00000000027A8000-memory.dmp

Filesize
32KB

Download
memory/2456-21-0x000000001B530000-0x000000001B812000-memory.dmp

Filesize
2.9MB

Download
memory/2752-8-0x000000001B800000-0x000000001BAE2000-memory.dmp

Filesize
2.9MB

Download
memory/2752-13-0x000007FEECB00000-0x000007FEED49D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-14-0x000007FEECB00000-0x000007FEED49D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-15-0x000007FEECB00000-0x000007FEED49D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-12-0x000007FEECB00000-0x000007FEED49D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-11-0x000007FEECB00000-0x000007FEED49D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-10-0x000007FEECB00000-0x000007FEED49D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-9-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2752-7-0x000007FEECDBE000-0x000007FEECDBF000-memory.dmp

Filesize
4KB

Download