umbral | cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16

Analysis

max time kernel
98s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral2/memory/4788-1-0x000001D34D180000-0x000001D34D202000-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
4872	powershell.exe
1096	powershell.exe
1624	powershell.exe
4124	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Loader.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
8	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
4364	cmd.exe
1988	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
548	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1988	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4788	Loader.exe
4872	powershell.exe
4872	powershell.exe
1096	powershell.exe
1096	powershell.exe
1624	powershell.exe
1624	powershell.exe
4592	powershell.exe
4592	powershell.exe
4124	powershell.exe
4124	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	Loader.exe
Token: SeIncreaseQuotaPrivilege	2092	wmic.exe
Token: SeSecurityPrivilege	2092	wmic.exe
Token: SeTakeOwnershipPrivilege	2092	wmic.exe
Token: SeLoadDriverPrivilege	2092	wmic.exe
Token: SeSystemProfilePrivilege	2092	wmic.exe
Token: SeSystemtimePrivilege	2092	wmic.exe
Token: SeProfSingleProcessPrivilege	2092	wmic.exe
Token: SeIncBasePriorityPrivilege	2092	wmic.exe
Token: SeCreatePagefilePrivilege	2092	wmic.exe
Token: SeBackupPrivilege	2092	wmic.exe
Token: SeRestorePrivilege	2092	wmic.exe
Token: SeShutdownPrivilege	2092	wmic.exe
Token: SeDebugPrivilege	2092	wmic.exe
Token: SeSystemEnvironmentPrivilege	2092	wmic.exe
Token: SeRemoteShutdownPrivilege	2092	wmic.exe
Token: SeUndockPrivilege	2092	wmic.exe
Token: SeManageVolumePrivilege	2092	wmic.exe
Token: 33	2092	wmic.exe
Token: 34	2092	wmic.exe
Token: 35	2092	wmic.exe
Token: 36	2092	wmic.exe
Token: SeIncreaseQuotaPrivilege	2092	wmic.exe
Token: SeSecurityPrivilege	2092	wmic.exe
Token: SeTakeOwnershipPrivilege	2092	wmic.exe
Token: SeLoadDriverPrivilege	2092	wmic.exe
Token: SeSystemProfilePrivilege	2092	wmic.exe
Token: SeSystemtimePrivilege	2092	wmic.exe
Token: SeProfSingleProcessPrivilege	2092	wmic.exe
Token: SeIncBasePriorityPrivilege	2092	wmic.exe
Token: SeCreatePagefilePrivilege	2092	wmic.exe
Token: SeBackupPrivilege	2092	wmic.exe
Token: SeRestorePrivilege	2092	wmic.exe
Token: SeShutdownPrivilege	2092	wmic.exe
Token: SeDebugPrivilege	2092	wmic.exe
Token: SeSystemEnvironmentPrivilege	2092	wmic.exe
Token: SeRemoteShutdownPrivilege	2092	wmic.exe
Token: SeUndockPrivilege	2092	wmic.exe
Token: SeManageVolumePrivilege	2092	wmic.exe
Token: 33	2092	wmic.exe
Token: 34	2092	wmic.exe
Token: 35	2092	wmic.exe
Token: 36	2092	wmic.exe
Token: SeDebugPrivilege	4872	powershell.exe
Token: SeDebugPrivilege	1096	powershell.exe
Token: SeDebugPrivilege	1624	powershell.exe
Token: SeDebugPrivilege	4592	powershell.exe
Token: SeIncreaseQuotaPrivilege	5068	wmic.exe
Token: SeSecurityPrivilege	5068	wmic.exe
Token: SeTakeOwnershipPrivilege	5068	wmic.exe
Token: SeLoadDriverPrivilege	5068	wmic.exe
Token: SeSystemProfilePrivilege	5068	wmic.exe
Token: SeSystemtimePrivilege	5068	wmic.exe
Token: SeProfSingleProcessPrivilege	5068	wmic.exe
Token: SeIncBasePriorityPrivilege	5068	wmic.exe
Token: SeCreatePagefilePrivilege	5068	wmic.exe
Token: SeBackupPrivilege	5068	wmic.exe
Token: SeRestorePrivilege	5068	wmic.exe
Token: SeShutdownPrivilege	5068	wmic.exe
Token: SeDebugPrivilege	5068	wmic.exe
Token: SeSystemEnvironmentPrivilege	5068	wmic.exe
Token: SeRemoteShutdownPrivilege	5068	wmic.exe
Token: SeUndockPrivilege	5068	wmic.exe
Token: SeManageVolumePrivilege	5068	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 2092	4788	Loader.exe	83
PID 4788 wrote to memory of 2092	4788	Loader.exe	83
PID 4788 wrote to memory of 3656	4788	Loader.exe	86
PID 4788 wrote to memory of 3656	4788	Loader.exe	86
PID 4788 wrote to memory of 4872	4788	Loader.exe	88
PID 4788 wrote to memory of 4872	4788	Loader.exe	88
PID 4788 wrote to memory of 1096	4788	Loader.exe	90
PID 4788 wrote to memory of 1096	4788	Loader.exe	90
PID 4788 wrote to memory of 1624	4788	Loader.exe	92
PID 4788 wrote to memory of 1624	4788	Loader.exe	92
PID 4788 wrote to memory of 4592	4788	Loader.exe	94
PID 4788 wrote to memory of 4592	4788	Loader.exe	94
PID 4788 wrote to memory of 5068	4788	Loader.exe	96
PID 4788 wrote to memory of 5068	4788	Loader.exe	96
PID 4788 wrote to memory of 1756	4788	Loader.exe	98
PID 4788 wrote to memory of 1756	4788	Loader.exe	98
PID 4788 wrote to memory of 4856	4788	Loader.exe	101
PID 4788 wrote to memory of 4856	4788	Loader.exe	101
PID 4788 wrote to memory of 4124	4788	Loader.exe	103
PID 4788 wrote to memory of 4124	4788	Loader.exe	103
PID 4788 wrote to memory of 548	4788	Loader.exe	105
PID 4788 wrote to memory of 548	4788	Loader.exe	105
PID 4788 wrote to memory of 4364	4788	Loader.exe	107
PID 4788 wrote to memory of 4364	4788	Loader.exe	107
PID 4364 wrote to memory of 1988	4364	cmd.exe	109
PID 4364 wrote to memory of 1988	4364	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3656	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:4788
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2092
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:3656
- 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:4872
- 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:1096
- 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:1624
- 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:4592
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4856
- 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:4124
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:548
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Loader.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4364
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1988

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
a43e653ffb5ab07940f4bdd9cc8fade4

SHA1
af43d04e3427f111b22dc891c5c7ee8a10ac4123

SHA256
c4c53abb13e99475aebfbe9fec7a8fead81c14c80d9dcc2b81375304f3a683fe

SHA512
62a97e95e1f19a8d4302847110dae44f469877eed6aa8ea22345c6eb25ee220e7d310fa0b7ec5df42356815421c0af7c46a0f1fee8933cc446641800eda6cd1b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
76692775e4781f0c9f0092f5804cfdb1

SHA1
6740e4e4110028c62282ee1e7eb8be576a2bc23a

SHA256
0c451ff3823450d544066237cbfb08556b7ca36c4a0ea085055f69ab35795b00

SHA512
6e0731e3736594d9e86da2fc33e08a663f29100074cc8d46e2716123c946b9eb150c804c7cf8428cac631e1cff984663d41ce3b5e1e77965bd8e2ecf0742af34

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zbu3bu1x.vyk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4788-72-0x000001D3679D0000-0x000001D3679DA000-memory.dmp

Filesize
40KB

Download
memory/4788-35-0x000001D34F110000-0x000001D34F12E000-memory.dmp

Filesize
120KB

Download
memory/4788-93-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4788-73-0x000001D367A00000-0x000001D367A12000-memory.dmp

Filesize
72KB

Download
memory/4788-2-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4788-33-0x000001D367900000-0x000001D367976000-memory.dmp

Filesize
472KB

Download
memory/4788-34-0x000001D367980000-0x000001D3679D0000-memory.dmp

Filesize
320KB

Download
memory/4788-0-0x00007FFE304F3000-0x00007FFE304F5000-memory.dmp

Filesize
8KB

Download
memory/4788-1-0x000001D34D180000-0x000001D34D202000-memory.dmp

Filesize
520KB

Download
memory/4872-15-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4872-13-0x0000027B14A80000-0x0000027B14AA2000-memory.dmp

Filesize
136KB

Download
memory/4872-12-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4872-14-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4872-18-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download