umbral | e14be40bad2e07456140fee37d8ca380811886c1c89b0b6e21e8b0f2a33ed663

Analysis

max time kernel
147s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
22-12-2024 12:54

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General

Target

Umbral.exe
Size

229KB
MD5

6f99ad653049306925da44b34fd12011
SHA1

df5d265397a6895efa77bed1478e79784cba7954
SHA256

e14be40bad2e07456140fee37d8ca380811886c1c89b0b6e21e8b0f2a33ed663
SHA512

89c9c171f1684cab8bd55b971cd69b9370f49d7da743f848b99d68523b89e2810ab033c4f26d539240d185186f72549bfb422b9c65cd7cf5c00f781693b569b8
SSDEEP

6144:FloZM+rIkd8g+EtXHkv/iD4YD5JR/k4XRG/BcoN2Nb8e1mFi:HoZtL+EP8YD5JR/k4XRG/BcoNW/

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3388-1-0x000001DE0E5F0000-0x000001DE0E630000-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
2872	powershell.exe
4036	powershell.exe
1384	powershell.exe
4032	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
3	discord.com
6	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
1	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
2728	PING.EXE
2300	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1168	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2728	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3388	Umbral.exe
2872	powershell.exe
2872	powershell.exe
4036	powershell.exe
4036	powershell.exe
1384	powershell.exe
1384	powershell.exe
1912	powershell.exe
1912	powershell.exe
4032	powershell.exe
4032	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3388	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4548	wmic.exe
Token: SeSecurityPrivilege	4548	wmic.exe
Token: SeTakeOwnershipPrivilege	4548	wmic.exe
Token: SeLoadDriverPrivilege	4548	wmic.exe
Token: SeSystemProfilePrivilege	4548	wmic.exe
Token: SeSystemtimePrivilege	4548	wmic.exe
Token: SeProfSingleProcessPrivilege	4548	wmic.exe
Token: SeIncBasePriorityPrivilege	4548	wmic.exe
Token: SeCreatePagefilePrivilege	4548	wmic.exe
Token: SeBackupPrivilege	4548	wmic.exe
Token: SeRestorePrivilege	4548	wmic.exe
Token: SeShutdownPrivilege	4548	wmic.exe
Token: SeDebugPrivilege	4548	wmic.exe
Token: SeSystemEnvironmentPrivilege	4548	wmic.exe
Token: SeRemoteShutdownPrivilege	4548	wmic.exe
Token: SeUndockPrivilege	4548	wmic.exe
Token: SeManageVolumePrivilege	4548	wmic.exe
Token: 33	4548	wmic.exe
Token: 34	4548	wmic.exe
Token: 35	4548	wmic.exe
Token: 36	4548	wmic.exe
Token: SeIncreaseQuotaPrivilege	4548	wmic.exe
Token: SeSecurityPrivilege	4548	wmic.exe
Token: SeTakeOwnershipPrivilege	4548	wmic.exe
Token: SeLoadDriverPrivilege	4548	wmic.exe
Token: SeSystemProfilePrivilege	4548	wmic.exe
Token: SeSystemtimePrivilege	4548	wmic.exe
Token: SeProfSingleProcessPrivilege	4548	wmic.exe
Token: SeIncBasePriorityPrivilege	4548	wmic.exe
Token: SeCreatePagefilePrivilege	4548	wmic.exe
Token: SeBackupPrivilege	4548	wmic.exe
Token: SeRestorePrivilege	4548	wmic.exe
Token: SeShutdownPrivilege	4548	wmic.exe
Token: SeDebugPrivilege	4548	wmic.exe
Token: SeSystemEnvironmentPrivilege	4548	wmic.exe
Token: SeRemoteShutdownPrivilege	4548	wmic.exe
Token: SeUndockPrivilege	4548	wmic.exe
Token: SeManageVolumePrivilege	4548	wmic.exe
Token: 33	4548	wmic.exe
Token: 34	4548	wmic.exe
Token: 35	4548	wmic.exe
Token: 36	4548	wmic.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	4036	powershell.exe
Token: SeDebugPrivilege	1384	powershell.exe
Token: SeDebugPrivilege	1912	powershell.exe
Token: SeIncreaseQuotaPrivilege	5104	wmic.exe
Token: SeSecurityPrivilege	5104	wmic.exe
Token: SeTakeOwnershipPrivilege	5104	wmic.exe
Token: SeLoadDriverPrivilege	5104	wmic.exe
Token: SeSystemProfilePrivilege	5104	wmic.exe
Token: SeSystemtimePrivilege	5104	wmic.exe
Token: SeProfSingleProcessPrivilege	5104	wmic.exe
Token: SeIncBasePriorityPrivilege	5104	wmic.exe
Token: SeCreatePagefilePrivilege	5104	wmic.exe
Token: SeBackupPrivilege	5104	wmic.exe
Token: SeRestorePrivilege	5104	wmic.exe
Token: SeShutdownPrivilege	5104	wmic.exe
Token: SeDebugPrivilege	5104	wmic.exe
Token: SeSystemEnvironmentPrivilege	5104	wmic.exe
Token: SeRemoteShutdownPrivilege	5104	wmic.exe
Token: SeUndockPrivilege	5104	wmic.exe
Token: SeManageVolumePrivilege	5104	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3388 wrote to memory of 4548	3388	Umbral.exe	77
PID 3388 wrote to memory of 4548	3388	Umbral.exe	77
PID 3388 wrote to memory of 5004	3388	Umbral.exe	80
PID 3388 wrote to memory of 5004	3388	Umbral.exe	80
PID 3388 wrote to memory of 2872	3388	Umbral.exe	82
PID 3388 wrote to memory of 2872	3388	Umbral.exe	82
PID 3388 wrote to memory of 4036	3388	Umbral.exe	84
PID 3388 wrote to memory of 4036	3388	Umbral.exe	84
PID 3388 wrote to memory of 1384	3388	Umbral.exe	86
PID 3388 wrote to memory of 1384	3388	Umbral.exe	86
PID 3388 wrote to memory of 1912	3388	Umbral.exe	88
PID 3388 wrote to memory of 1912	3388	Umbral.exe	88
PID 3388 wrote to memory of 5104	3388	Umbral.exe	90
PID 3388 wrote to memory of 5104	3388	Umbral.exe	90
PID 3388 wrote to memory of 1508	3388	Umbral.exe	92
PID 3388 wrote to memory of 1508	3388	Umbral.exe	92
PID 3388 wrote to memory of 5048	3388	Umbral.exe	94
PID 3388 wrote to memory of 5048	3388	Umbral.exe	94
PID 3388 wrote to memory of 4032	3388	Umbral.exe	96
PID 3388 wrote to memory of 4032	3388	Umbral.exe	96
PID 3388 wrote to memory of 1168	3388	Umbral.exe	98
PID 3388 wrote to memory of 1168	3388	Umbral.exe	98
PID 3388 wrote to memory of 2300	3388	Umbral.exe	100
PID 3388 wrote to memory of 2300	3388	Umbral.exe	100
PID 2300 wrote to memory of 2728	2300	cmd.exe	102
PID 2300 wrote to memory of 2728	2300	cmd.exe	102

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5004	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3388
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4548
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:5004
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- 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:4036
- 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:1384
- 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:1912
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5104
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1508
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5048
- 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:4032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1168
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2300
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2728

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

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
6bddc96a32b9ed8fc70b141ccf4a39b2

SHA1
0f33c0699da40a5eadcec646791cf21cdb0dd7c6

SHA256
cb3853abe77eb0da8a1caccb49e97a573b6f35570722eb759116a645d724c132

SHA512
e41f1597b4129b759e4199db195df1c24e47cc47dc9850fab2d48e44bc3d37dc3658fbfbb62332a0b93c552587d7fab09de1634f605faa2209b8470c2a6eaca6

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
60a84ea8f3888e51bb0fe4856926a639

SHA1
43848b5a831f8fe7623694b36b17554b83770269

SHA256
5d219511d1091f4dc52ef6664815bcacf013c76b695bf2195aa439a6cc431504

SHA512
f6381deedc9612c96914173d948bd601192256c1b65a6b6be3c6664de84df64fb8740fa0205846e0380305bf5442e52991d134ff94b8edc899775befcc4a86ba

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jjnnw2ox.tyr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2872-4-0x00007FFF856F0000-0x00007FFF861B2000-memory.dmp

Filesize
10.8MB

Download
memory/2872-5-0x00007FFF856F0000-0x00007FFF861B2000-memory.dmp

Filesize
10.8MB

Download
memory/2872-11-0x000001EDD1800000-0x000001EDD1822000-memory.dmp

Filesize
136KB

Download
memory/2872-17-0x00007FFF856F0000-0x00007FFF861B2000-memory.dmp

Filesize
10.8MB

Download
memory/2872-3-0x00007FFF856F0000-0x00007FFF861B2000-memory.dmp

Filesize
10.8MB

Download
memory/3388-32-0x000001DE28E40000-0x000001DE28E90000-memory.dmp

Filesize
320KB

Download
memory/3388-31-0x000001DE28DC0000-0x000001DE28E36000-memory.dmp

Filesize
472KB

Download
memory/3388-33-0x000001DE28D40000-0x000001DE28D5E000-memory.dmp

Filesize
120KB

Download
memory/3388-1-0x000001DE0E5F0000-0x000001DE0E630000-memory.dmp

Filesize
256KB

Download
memory/3388-0-0x00007FFF856F3000-0x00007FFF856F5000-memory.dmp

Filesize
8KB

Download
memory/3388-68-0x000001DE28D70000-0x000001DE28D7A000-memory.dmp

Filesize
40KB

Download
memory/3388-69-0x000001DE28DA0000-0x000001DE28DB2000-memory.dmp

Filesize
72KB

Download
memory/3388-2-0x00007FFF856F0000-0x00007FFF861B2000-memory.dmp

Filesize
10.8MB

Download
memory/3388-88-0x00007FFF856F0000-0x00007FFF861B2000-memory.dmp

Filesize
10.8MB

Download