umbral | e1663465701c284caff2ef4acd4649efb4aae0b9d935da69766dca2c019bcd0f

Analysis

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

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
06-08-2024 16:11

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General

Target

file_out.exe
Size

214KB
MD5

a23841ed39cc3b09d4e731a80e2d70a6
SHA1

89f95246610063d67db46554f9d4ac61b8c45e02
SHA256

e1663465701c284caff2ef4acd4649efb4aae0b9d935da69766dca2c019bcd0f
SHA512

1a6c9478beccf81c1371bb59a7c7854d7f19481747705419e5816e42271b526469c74e06b66910514cc5385a69819cc86016ede8b0ccd970976ac59d52afffa5
SSDEEP

3072:1lP/chtWkOIGSSvDvPnsUSCpjli8vRXfOZ44lllllj0em1Sl8eN7bqXBptXT5j/:bcyHIGNsUSUBvRty8eNH8pR

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2200-1-0x0000000000E10000-0x0000000000E4C000-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
2364	powershell.exe
3004	powershell.exe
2772	powershell.exe
1472	powershell.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
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
1780	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2364	powershell.exe
3004	powershell.exe
2772	powershell.exe
2908	powershell.exe
1472	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	file_out.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeDebugPrivilege	2772	powershell.exe
Token: SeDebugPrivilege	2908	powershell.exe
Token: SeIncreaseQuotaPrivilege	1720	wmic.exe
Token: SeSecurityPrivilege	1720	wmic.exe
Token: SeTakeOwnershipPrivilege	1720	wmic.exe
Token: SeLoadDriverPrivilege	1720	wmic.exe
Token: SeSystemProfilePrivilege	1720	wmic.exe
Token: SeSystemtimePrivilege	1720	wmic.exe
Token: SeProfSingleProcessPrivilege	1720	wmic.exe
Token: SeIncBasePriorityPrivilege	1720	wmic.exe
Token: SeCreatePagefilePrivilege	1720	wmic.exe
Token: SeBackupPrivilege	1720	wmic.exe
Token: SeRestorePrivilege	1720	wmic.exe
Token: SeShutdownPrivilege	1720	wmic.exe
Token: SeDebugPrivilege	1720	wmic.exe
Token: SeSystemEnvironmentPrivilege	1720	wmic.exe
Token: SeRemoteShutdownPrivilege	1720	wmic.exe
Token: SeUndockPrivilege	1720	wmic.exe
Token: SeManageVolumePrivilege	1720	wmic.exe
Token: 33	1720	wmic.exe
Token: 34	1720	wmic.exe
Token: 35	1720	wmic.exe
Token: SeIncreaseQuotaPrivilege	1720	wmic.exe
Token: SeSecurityPrivilege	1720	wmic.exe
Token: SeTakeOwnershipPrivilege	1720	wmic.exe
Token: SeLoadDriverPrivilege	1720	wmic.exe
Token: SeSystemProfilePrivilege	1720	wmic.exe
Token: SeSystemtimePrivilege	1720	wmic.exe
Token: SeProfSingleProcessPrivilege	1720	wmic.exe
Token: SeIncBasePriorityPrivilege	1720	wmic.exe
Token: SeCreatePagefilePrivilege	1720	wmic.exe
Token: SeBackupPrivilege	1720	wmic.exe
Token: SeRestorePrivilege	1720	wmic.exe
Token: SeShutdownPrivilege	1720	wmic.exe
Token: SeDebugPrivilege	1720	wmic.exe
Token: SeSystemEnvironmentPrivilege	1720	wmic.exe
Token: SeRemoteShutdownPrivilege	1720	wmic.exe
Token: SeUndockPrivilege	1720	wmic.exe
Token: SeManageVolumePrivilege	1720	wmic.exe
Token: 33	1720	wmic.exe
Token: 34	1720	wmic.exe
Token: 35	1720	wmic.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2364	2200	file_out.exe	30
PID 2200 wrote to memory of 2364	2200	file_out.exe	30
PID 2200 wrote to memory of 2364	2200	file_out.exe	30
PID 2200 wrote to memory of 3004	2200	file_out.exe	32
PID 2200 wrote to memory of 3004	2200	file_out.exe	32
PID 2200 wrote to memory of 3004	2200	file_out.exe	32
PID 2200 wrote to memory of 2772	2200	file_out.exe	34
PID 2200 wrote to memory of 2772	2200	file_out.exe	34
PID 2200 wrote to memory of 2772	2200	file_out.exe	34
PID 2200 wrote to memory of 2908	2200	file_out.exe	36
PID 2200 wrote to memory of 2908	2200	file_out.exe	36
PID 2200 wrote to memory of 2908	2200	file_out.exe	36
PID 2200 wrote to memory of 1720	2200	file_out.exe	38
PID 2200 wrote to memory of 1720	2200	file_out.exe	38
PID 2200 wrote to memory of 1720	2200	file_out.exe	38
PID 2200 wrote to memory of 2576	2200	file_out.exe	41
PID 2200 wrote to memory of 2576	2200	file_out.exe	41
PID 2200 wrote to memory of 2576	2200	file_out.exe	41
PID 2200 wrote to memory of 1488	2200	file_out.exe	43
PID 2200 wrote to memory of 1488	2200	file_out.exe	43
PID 2200 wrote to memory of 1488	2200	file_out.exe	43
PID 2200 wrote to memory of 1472	2200	file_out.exe	45
PID 2200 wrote to memory of 1472	2200	file_out.exe	45
PID 2200 wrote to memory of 1472	2200	file_out.exe	45
PID 2200 wrote to memory of 1780	2200	file_out.exe	47
PID 2200 wrote to memory of 1780	2200	file_out.exe	47
PID 2200 wrote to memory of 1780	2200	file_out.exe	47

C:\Users\Admin\AppData\Local\Temp\file_out.exe
"C:\Users\Admin\AppData\Local\Temp\file_out.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\file_out.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2364
- 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:3004
- 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:2772
- 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:2908
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1720
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2576
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1488
- 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:1472
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1780

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
ba92a1730b0d503d3d5a9f5bb9390539

SHA1
c7e86959c774ef1c2775b89466497911dbbe55e8

SHA256
136368cb4c83e356cef9e381e064eac6fc2c81c062606fceb8a7eb1f02563545

SHA512
2552970cd3cd3db48d709a02fedcba8d74e8b1c88dd0fd449d28235a7554d1a1fc1f6ee40e71bb39ebcbbf2c2c1baa18f46eb0024f87392e74058921c60f7eae

Download Submit
memory/1472-48-0x0000000002000000-0x0000000002008000-memory.dmp

Filesize
32KB

Download
memory/2200-1-0x0000000000E10000-0x0000000000E4C000-memory.dmp

Filesize
240KB

Download
memory/2200-2-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

Filesize
9.9MB

Download
memory/2200-52-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

Filesize
9.9MB

Download
memory/2200-0-0x000007FEF5F53000-0x000007FEF5F54000-memory.dmp

Filesize
4KB

Download
memory/2364-10-0x000007FEEDC60000-0x000007FEEE5FD000-memory.dmp

Filesize
9.6MB

Download
memory/2364-12-0x000007FEEDC60000-0x000007FEEE5FD000-memory.dmp

Filesize
9.6MB

Download
memory/2364-11-0x000007FEEDC60000-0x000007FEEE5FD000-memory.dmp

Filesize
9.6MB

Download
memory/2364-14-0x000007FEEDC60000-0x000007FEEE5FD000-memory.dmp

Filesize
9.6MB

Download
memory/2364-15-0x000007FEEDC60000-0x000007FEEE5FD000-memory.dmp

Filesize
9.6MB

Download
memory/2364-13-0x000007FEEDC60000-0x000007FEEE5FD000-memory.dmp

Filesize
9.6MB

Download
memory/2364-8-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2364-9-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/2364-7-0x000007FEEDF1E000-0x000007FEEDF1F000-memory.dmp

Filesize
4KB

Download
memory/3004-21-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/3004-22-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download