umbral | 9c7acf37e5afc9eccc95c482058be6240659038f34a3b1237db66addb8bfe20c

Analysis

max time kernel
94s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2024 10:42

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General

Target

Umbral.exe
Size

229KB
MD5

9c5fa08220a406dd817047dd315c696e
SHA1

2062fbed265d945daf4937ed0a118378f29a9d66
SHA256

9c7acf37e5afc9eccc95c482058be6240659038f34a3b1237db66addb8bfe20c
SHA512

81f7d183f7019c1933ecb755b5c8527c9ad6b8ffba4b7a2999c31696d65d96cc1185918f267dd838e9a64fa7e6ff525e6a0a60e6bfcc2a920f60fe3323f70376
SSDEEP

6144:lloZMArIkd8g+EtXHkv/iD4suXUYe5xyTXKYZd8cYb8e1mfyi:noZHL+EP8suXUYe5xyTXKYZd8tk

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1660-1-0x000001CF60D60000-0x000001CF60DA0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
1132	powershell.exe
2012	powershell.exe
2328	powershell.exe
3884	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
23	discord.com
22	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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4308	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1132	powershell.exe
1132	powershell.exe
2012	powershell.exe
2012	powershell.exe
2328	powershell.exe
2328	powershell.exe
3824	powershell.exe
3824	powershell.exe
3884	powershell.exe
3884	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1660	Umbral.exe
Token: SeDebugPrivilege	1132	powershell.exe
Token: SeDebugPrivilege	2012	powershell.exe
Token: SeDebugPrivilege	2328	powershell.exe
Token: SeDebugPrivilege	3824	powershell.exe
Token: SeIncreaseQuotaPrivilege	3212	wmic.exe
Token: SeSecurityPrivilege	3212	wmic.exe
Token: SeTakeOwnershipPrivilege	3212	wmic.exe
Token: SeLoadDriverPrivilege	3212	wmic.exe
Token: SeSystemProfilePrivilege	3212	wmic.exe
Token: SeSystemtimePrivilege	3212	wmic.exe
Token: SeProfSingleProcessPrivilege	3212	wmic.exe
Token: SeIncBasePriorityPrivilege	3212	wmic.exe
Token: SeCreatePagefilePrivilege	3212	wmic.exe
Token: SeBackupPrivilege	3212	wmic.exe
Token: SeRestorePrivilege	3212	wmic.exe
Token: SeShutdownPrivilege	3212	wmic.exe
Token: SeDebugPrivilege	3212	wmic.exe
Token: SeSystemEnvironmentPrivilege	3212	wmic.exe
Token: SeRemoteShutdownPrivilege	3212	wmic.exe
Token: SeUndockPrivilege	3212	wmic.exe
Token: SeManageVolumePrivilege	3212	wmic.exe
Token: 33	3212	wmic.exe
Token: 34	3212	wmic.exe
Token: 35	3212	wmic.exe
Token: 36	3212	wmic.exe
Token: SeIncreaseQuotaPrivilege	3212	wmic.exe
Token: SeSecurityPrivilege	3212	wmic.exe
Token: SeTakeOwnershipPrivilege	3212	wmic.exe
Token: SeLoadDriverPrivilege	3212	wmic.exe
Token: SeSystemProfilePrivilege	3212	wmic.exe
Token: SeSystemtimePrivilege	3212	wmic.exe
Token: SeProfSingleProcessPrivilege	3212	wmic.exe
Token: SeIncBasePriorityPrivilege	3212	wmic.exe
Token: SeCreatePagefilePrivilege	3212	wmic.exe
Token: SeBackupPrivilege	3212	wmic.exe
Token: SeRestorePrivilege	3212	wmic.exe
Token: SeShutdownPrivilege	3212	wmic.exe
Token: SeDebugPrivilege	3212	wmic.exe
Token: SeSystemEnvironmentPrivilege	3212	wmic.exe
Token: SeRemoteShutdownPrivilege	3212	wmic.exe
Token: SeUndockPrivilege	3212	wmic.exe
Token: SeManageVolumePrivilege	3212	wmic.exe
Token: 33	3212	wmic.exe
Token: 34	3212	wmic.exe
Token: 35	3212	wmic.exe
Token: 36	3212	wmic.exe
Token: SeIncreaseQuotaPrivilege	4188	wmic.exe
Token: SeSecurityPrivilege	4188	wmic.exe
Token: SeTakeOwnershipPrivilege	4188	wmic.exe
Token: SeLoadDriverPrivilege	4188	wmic.exe
Token: SeSystemProfilePrivilege	4188	wmic.exe
Token: SeSystemtimePrivilege	4188	wmic.exe
Token: SeProfSingleProcessPrivilege	4188	wmic.exe
Token: SeIncBasePriorityPrivilege	4188	wmic.exe
Token: SeCreatePagefilePrivilege	4188	wmic.exe
Token: SeBackupPrivilege	4188	wmic.exe
Token: SeRestorePrivilege	4188	wmic.exe
Token: SeShutdownPrivilege	4188	wmic.exe
Token: SeDebugPrivilege	4188	wmic.exe
Token: SeSystemEnvironmentPrivilege	4188	wmic.exe
Token: SeRemoteShutdownPrivilege	4188	wmic.exe
Token: SeUndockPrivilege	4188	wmic.exe
Token: SeManageVolumePrivilege	4188	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 1132	1660	Umbral.exe	84
PID 1660 wrote to memory of 1132	1660	Umbral.exe	84
PID 1660 wrote to memory of 2012	1660	Umbral.exe	88
PID 1660 wrote to memory of 2012	1660	Umbral.exe	88
PID 1660 wrote to memory of 2328	1660	Umbral.exe	90
PID 1660 wrote to memory of 2328	1660	Umbral.exe	90
PID 1660 wrote to memory of 3824	1660	Umbral.exe	92
PID 1660 wrote to memory of 3824	1660	Umbral.exe	92
PID 1660 wrote to memory of 3212	1660	Umbral.exe	94
PID 1660 wrote to memory of 3212	1660	Umbral.exe	94
PID 1660 wrote to memory of 4188	1660	Umbral.exe	99
PID 1660 wrote to memory of 4188	1660	Umbral.exe	99
PID 1660 wrote to memory of 2644	1660	Umbral.exe	101
PID 1660 wrote to memory of 2644	1660	Umbral.exe	101
PID 1660 wrote to memory of 3884	1660	Umbral.exe	103
PID 1660 wrote to memory of 3884	1660	Umbral.exe	103
PID 1660 wrote to memory of 4308	1660	Umbral.exe	105
PID 1660 wrote to memory of 4308	1660	Umbral.exe	105

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:1660
- 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:1132
- 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:2012
- 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:2328
- 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:3824
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4188
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2644
- 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:3884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4308

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
948B

MD5
f4bf3ca8753d6bb9725419fec1ec74b9

SHA1
71fce9d17d1d92873236a9a827c52eb9e4827f3d

SHA256
ca8697e4ada4c3d4aac2899b8aad4052ccd605fccee05ee0a831368bde2f7417

SHA512
a55a107ae8bcf833ea674413c765cd55096146c9634dff41884fcc851c12fe47753308099525c99ae44883facfb668c8b292dd915263f34ebd1190391cb28a54

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_lqunkia1.qba.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1132-13-0x000001ED7D0F0000-0x000001ED7D112000-memory.dmp

Filesize
136KB

Download
memory/1132-14-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1132-15-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1132-18-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1132-3-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1660-34-0x000001CF7B560000-0x000001CF7B5B0000-memory.dmp

Filesize
320KB

Download
memory/1660-33-0x000001CF7B4E0000-0x000001CF7B556000-memory.dmp

Filesize
472KB

Download
memory/1660-35-0x000001CF7B2F0000-0x000001CF7B30E000-memory.dmp

Filesize
120KB

Download
memory/1660-1-0x000001CF60D60000-0x000001CF60DA0000-memory.dmp

Filesize
256KB

Download
memory/1660-0-0x00007FF99E433000-0x00007FF99E435000-memory.dmp

Filesize
8KB

Download
memory/1660-71-0x000001CF7B330000-0x000001CF7B33A000-memory.dmp

Filesize
40KB

Download
memory/1660-72-0x000001CF7B480000-0x000001CF7B492000-memory.dmp

Filesize
72KB

Download
memory/1660-2-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1660-90-0x000001CF7B690000-0x000001CF7B839000-memory.dmp

Filesize
1.7MB

Download
memory/1660-91-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download