umbral | cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
19-01-2025 14:14

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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/1212-1-0x0000000000360000-0x00000000003E2000-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
2752	powershell.exe
2760	powershell.exe
2600	powershell.exe
1528	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
2380	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
2380	cmd.exe
2096	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1960	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2096	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1212	Loader.exe
2752	powershell.exe
2760	powershell.exe
2600	powershell.exe
1156	powershell.exe
1528	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	Loader.exe
Token: SeIncreaseQuotaPrivilege	2164	wmic.exe
Token: SeSecurityPrivilege	2164	wmic.exe
Token: SeTakeOwnershipPrivilege	2164	wmic.exe
Token: SeLoadDriverPrivilege	2164	wmic.exe
Token: SeSystemProfilePrivilege	2164	wmic.exe
Token: SeSystemtimePrivilege	2164	wmic.exe
Token: SeProfSingleProcessPrivilege	2164	wmic.exe
Token: SeIncBasePriorityPrivilege	2164	wmic.exe
Token: SeCreatePagefilePrivilege	2164	wmic.exe
Token: SeBackupPrivilege	2164	wmic.exe
Token: SeRestorePrivilege	2164	wmic.exe
Token: SeShutdownPrivilege	2164	wmic.exe
Token: SeDebugPrivilege	2164	wmic.exe
Token: SeSystemEnvironmentPrivilege	2164	wmic.exe
Token: SeRemoteShutdownPrivilege	2164	wmic.exe
Token: SeUndockPrivilege	2164	wmic.exe
Token: SeManageVolumePrivilege	2164	wmic.exe
Token: 33	2164	wmic.exe
Token: 34	2164	wmic.exe
Token: 35	2164	wmic.exe
Token: SeIncreaseQuotaPrivilege	2164	wmic.exe
Token: SeSecurityPrivilege	2164	wmic.exe
Token: SeTakeOwnershipPrivilege	2164	wmic.exe
Token: SeLoadDriverPrivilege	2164	wmic.exe
Token: SeSystemProfilePrivilege	2164	wmic.exe
Token: SeSystemtimePrivilege	2164	wmic.exe
Token: SeProfSingleProcessPrivilege	2164	wmic.exe
Token: SeIncBasePriorityPrivilege	2164	wmic.exe
Token: SeCreatePagefilePrivilege	2164	wmic.exe
Token: SeBackupPrivilege	2164	wmic.exe
Token: SeRestorePrivilege	2164	wmic.exe
Token: SeShutdownPrivilege	2164	wmic.exe
Token: SeDebugPrivilege	2164	wmic.exe
Token: SeSystemEnvironmentPrivilege	2164	wmic.exe
Token: SeRemoteShutdownPrivilege	2164	wmic.exe
Token: SeUndockPrivilege	2164	wmic.exe
Token: SeManageVolumePrivilege	2164	wmic.exe
Token: 33	2164	wmic.exe
Token: 34	2164	wmic.exe
Token: 35	2164	wmic.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	1156	powershell.exe
Token: SeIncreaseQuotaPrivilege	2128	wmic.exe
Token: SeSecurityPrivilege	2128	wmic.exe
Token: SeTakeOwnershipPrivilege	2128	wmic.exe
Token: SeLoadDriverPrivilege	2128	wmic.exe
Token: SeSystemProfilePrivilege	2128	wmic.exe
Token: SeSystemtimePrivilege	2128	wmic.exe
Token: SeProfSingleProcessPrivilege	2128	wmic.exe
Token: SeIncBasePriorityPrivilege	2128	wmic.exe
Token: SeCreatePagefilePrivilege	2128	wmic.exe
Token: SeBackupPrivilege	2128	wmic.exe
Token: SeRestorePrivilege	2128	wmic.exe
Token: SeShutdownPrivilege	2128	wmic.exe
Token: SeDebugPrivilege	2128	wmic.exe
Token: SeSystemEnvironmentPrivilege	2128	wmic.exe
Token: SeRemoteShutdownPrivilege	2128	wmic.exe
Token: SeUndockPrivilege	2128	wmic.exe
Token: SeManageVolumePrivilege	2128	wmic.exe
Token: 33	2128	wmic.exe
Token: 34	2128	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 2164	1212	Loader.exe	30
PID 1212 wrote to memory of 2164	1212	Loader.exe	30
PID 1212 wrote to memory of 2164	1212	Loader.exe	30
PID 1212 wrote to memory of 2908	1212	Loader.exe	33
PID 1212 wrote to memory of 2908	1212	Loader.exe	33
PID 1212 wrote to memory of 2908	1212	Loader.exe	33
PID 1212 wrote to memory of 2752	1212	Loader.exe	35
PID 1212 wrote to memory of 2752	1212	Loader.exe	35
PID 1212 wrote to memory of 2752	1212	Loader.exe	35
PID 1212 wrote to memory of 2760	1212	Loader.exe	37
PID 1212 wrote to memory of 2760	1212	Loader.exe	37
PID 1212 wrote to memory of 2760	1212	Loader.exe	37
PID 1212 wrote to memory of 2600	1212	Loader.exe	39
PID 1212 wrote to memory of 2600	1212	Loader.exe	39
PID 1212 wrote to memory of 2600	1212	Loader.exe	39
PID 1212 wrote to memory of 1156	1212	Loader.exe	41
PID 1212 wrote to memory of 1156	1212	Loader.exe	41
PID 1212 wrote to memory of 1156	1212	Loader.exe	41
PID 1212 wrote to memory of 2128	1212	Loader.exe	43
PID 1212 wrote to memory of 2128	1212	Loader.exe	43
PID 1212 wrote to memory of 2128	1212	Loader.exe	43
PID 1212 wrote to memory of 1356	1212	Loader.exe	45
PID 1212 wrote to memory of 1356	1212	Loader.exe	45
PID 1212 wrote to memory of 1356	1212	Loader.exe	45
PID 1212 wrote to memory of 2832	1212	Loader.exe	47
PID 1212 wrote to memory of 2832	1212	Loader.exe	47
PID 1212 wrote to memory of 2832	1212	Loader.exe	47
PID 1212 wrote to memory of 1528	1212	Loader.exe	49
PID 1212 wrote to memory of 1528	1212	Loader.exe	49
PID 1212 wrote to memory of 1528	1212	Loader.exe	49
PID 1212 wrote to memory of 1960	1212	Loader.exe	51
PID 1212 wrote to memory of 1960	1212	Loader.exe	51
PID 1212 wrote to memory of 1960	1212	Loader.exe	51
PID 1212 wrote to memory of 2380	1212	Loader.exe	53
PID 1212 wrote to memory of 2380	1212	Loader.exe	53
PID 1212 wrote to memory of 2380	1212	Loader.exe	53
PID 2380 wrote to memory of 2096	2380	cmd.exe	55
PID 2380 wrote to memory of 2096	2380	cmd.exe	55
PID 2380 wrote to memory of 2096	2380	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2908	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:1212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2164
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:2908
- 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: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:2760
- 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:2600
- 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:1156
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2128
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1356
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2832
- 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:1528
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1960
- 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:2380
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2096

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
acc5947bd92d2ce501999a36fbb989f2

SHA1
f52dfdbab588e04c91de0f84b0c913120af0c82d

SHA256
cd5390de46a9865b5ef24ba804a7d6cd8bfc52b3a426cef4d60458bdea1c8755

SHA512
ffebf71d6c1c10ab44ad540652c63347f00aef844e75d419860576e3812a7924ea9d454be4bb7d06645fde3a5ffc9a51276e2529e898dfe38dbd2b411fd7de55

Download Submit
memory/1212-0-0x000007FEF5A03000-0x000007FEF5A04000-memory.dmp

Filesize
4KB

Download
memory/1212-1-0x0000000000360000-0x00000000003E2000-memory.dmp

Filesize
520KB

Download
memory/1212-2-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

Filesize
9.9MB

Download
memory/1212-48-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

Filesize
9.9MB

Download
memory/1528-44-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/2752-7-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2752-8-0x00000000027B0000-0x00000000027B8000-memory.dmp

Filesize
32KB

Download
memory/2760-14-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2760-15-0x00000000026F0000-0x00000000026F8000-memory.dmp

Filesize
32KB

Download