umbral | c9284451e9c756e38ee65feed1db743bc535066136851e71c707402607e06501

Analysis

max time kernel
92s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 18:49

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General

Target

Umbral.exe
Size

229KB
MD5

518a530502d5793fddad2cf074af8850
SHA1

6ff6542721e9cf284129daf442c193911dda8367
SHA256

c9284451e9c756e38ee65feed1db743bc535066136851e71c707402607e06501
SHA512

232768823683c549468b0a11122a4c4831d528ad5861f1930714d9c7840405ac3fb145e7a8d85a3b14d6f92d93e41be692176755fb590bdfb6295cd80788c545
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4deC+pNbYMTgqL9Y0hBpb8e1meIi:noZtL+EP8deC+pNbYMTgqL9Y0h/R

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2532-1-0x0000020151090000-0x00000201510D0000-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
3064	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
32	discord.com
33	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
7	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
876	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
544	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2532	Umbral.exe
3064	powershell.exe
3064	powershell.exe
4604	powershell.exe
4604	powershell.exe
4588	powershell.exe
4588	powershell.exe
2484	powershell.exe
2484	powershell.exe
4292	powershell.exe
4292	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4024	wmic.exe
Token: SeSecurityPrivilege	4024	wmic.exe
Token: SeTakeOwnershipPrivilege	4024	wmic.exe
Token: SeLoadDriverPrivilege	4024	wmic.exe
Token: SeSystemProfilePrivilege	4024	wmic.exe
Token: SeSystemtimePrivilege	4024	wmic.exe
Token: SeProfSingleProcessPrivilege	4024	wmic.exe
Token: SeIncBasePriorityPrivilege	4024	wmic.exe
Token: SeCreatePagefilePrivilege	4024	wmic.exe
Token: SeBackupPrivilege	4024	wmic.exe
Token: SeRestorePrivilege	4024	wmic.exe
Token: SeShutdownPrivilege	4024	wmic.exe
Token: SeDebugPrivilege	4024	wmic.exe
Token: SeSystemEnvironmentPrivilege	4024	wmic.exe
Token: SeRemoteShutdownPrivilege	4024	wmic.exe
Token: SeUndockPrivilege	4024	wmic.exe
Token: SeManageVolumePrivilege	4024	wmic.exe
Token: 33	4024	wmic.exe
Token: 34	4024	wmic.exe
Token: 35	4024	wmic.exe
Token: 36	4024	wmic.exe
Token: SeIncreaseQuotaPrivilege	4024	wmic.exe
Token: SeSecurityPrivilege	4024	wmic.exe
Token: SeTakeOwnershipPrivilege	4024	wmic.exe
Token: SeLoadDriverPrivilege	4024	wmic.exe
Token: SeSystemProfilePrivilege	4024	wmic.exe
Token: SeSystemtimePrivilege	4024	wmic.exe
Token: SeProfSingleProcessPrivilege	4024	wmic.exe
Token: SeIncBasePriorityPrivilege	4024	wmic.exe
Token: SeCreatePagefilePrivilege	4024	wmic.exe
Token: SeBackupPrivilege	4024	wmic.exe
Token: SeRestorePrivilege	4024	wmic.exe
Token: SeShutdownPrivilege	4024	wmic.exe
Token: SeDebugPrivilege	4024	wmic.exe
Token: SeSystemEnvironmentPrivilege	4024	wmic.exe
Token: SeRemoteShutdownPrivilege	4024	wmic.exe
Token: SeUndockPrivilege	4024	wmic.exe
Token: SeManageVolumePrivilege	4024	wmic.exe
Token: 33	4024	wmic.exe
Token: 34	4024	wmic.exe
Token: 35	4024	wmic.exe
Token: 36	4024	wmic.exe
Token: SeDebugPrivilege	3064	powershell.exe
Token: SeDebugPrivilege	4604	powershell.exe
Token: SeDebugPrivilege	4588	powershell.exe
Token: SeDebugPrivilege	2484	powershell.exe
Token: SeIncreaseQuotaPrivilege	3240	wmic.exe
Token: SeSecurityPrivilege	3240	wmic.exe
Token: SeTakeOwnershipPrivilege	3240	wmic.exe
Token: SeLoadDriverPrivilege	3240	wmic.exe
Token: SeSystemProfilePrivilege	3240	wmic.exe
Token: SeSystemtimePrivilege	3240	wmic.exe
Token: SeProfSingleProcessPrivilege	3240	wmic.exe
Token: SeIncBasePriorityPrivilege	3240	wmic.exe
Token: SeCreatePagefilePrivilege	3240	wmic.exe
Token: SeBackupPrivilege	3240	wmic.exe
Token: SeRestorePrivilege	3240	wmic.exe
Token: SeShutdownPrivilege	3240	wmic.exe
Token: SeDebugPrivilege	3240	wmic.exe
Token: SeSystemEnvironmentPrivilege	3240	wmic.exe
Token: SeRemoteShutdownPrivilege	3240	wmic.exe
Token: SeUndockPrivilege	3240	wmic.exe
Token: SeManageVolumePrivilege	3240	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 4024	2532	Umbral.exe	83
PID 2532 wrote to memory of 4024	2532	Umbral.exe	83
PID 2532 wrote to memory of 4940	2532	Umbral.exe	88
PID 2532 wrote to memory of 4940	2532	Umbral.exe	88
PID 2532 wrote to memory of 3064	2532	Umbral.exe	90
PID 2532 wrote to memory of 3064	2532	Umbral.exe	90
PID 2532 wrote to memory of 4604	2532	Umbral.exe	93
PID 2532 wrote to memory of 4604	2532	Umbral.exe	93
PID 2532 wrote to memory of 4588	2532	Umbral.exe	95
PID 2532 wrote to memory of 4588	2532	Umbral.exe	95
PID 2532 wrote to memory of 2484	2532	Umbral.exe	97
PID 2532 wrote to memory of 2484	2532	Umbral.exe	97
PID 2532 wrote to memory of 3240	2532	Umbral.exe	101
PID 2532 wrote to memory of 3240	2532	Umbral.exe	101
PID 2532 wrote to memory of 1508	2532	Umbral.exe	103
PID 2532 wrote to memory of 1508	2532	Umbral.exe	103
PID 2532 wrote to memory of 4112	2532	Umbral.exe	105
PID 2532 wrote to memory of 4112	2532	Umbral.exe	105
PID 2532 wrote to memory of 4292	2532	Umbral.exe	107
PID 2532 wrote to memory of 4292	2532	Umbral.exe	107
PID 2532 wrote to memory of 876	2532	Umbral.exe	109
PID 2532 wrote to memory of 876	2532	Umbral.exe	109
PID 2532 wrote to memory of 4884	2532	Umbral.exe	111
PID 2532 wrote to memory of 4884	2532	Umbral.exe	111
PID 4884 wrote to memory of 544	4884	cmd.exe	113
PID 4884 wrote to memory of 544	4884	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4940	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:2532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4024
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4940
- 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:3064
- 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:4604
- 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:4588
- 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:2484
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3240
- 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:4112
- 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:4292
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:876
- 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:4884
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:544

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
3f38d7a2fa74868466e03425b34acecc

SHA1
67941834ae7b82ec7d565e8fd147c2dbbbebd16a

SHA256
97be3f5454275106e2d6eb92fbbbef090ab7a896cad1abcd9c65a3b915fc7bb3

SHA512
640d99debd800e06e7248050673cca404bad37a353c4b4a5426049219fdb483c9ccd796a07fbf12156e82a8ddee6e72ad9a3d846a2163673c423558635b6cc63

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
f86a7aad5202a7a511b1bc73bba3eb8b

SHA1
c320a3804727727da5ed2ca4f4f9ab53113000e1

SHA256
5e1d171874546292c6a0b939ae701d46a5621ab8cb4184e22392bea72ccb8124

SHA512
9b4bd8728a21f63c0f304c401d6d166bb4b8feb831ee9aa2f465abda1b8fc6bbd95cb42df1ed6bc85780f5b8e35de4f846024a373c8427d3e8a03c493ad77590

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_b1fjkbkn.q5b.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2532-73-0x000002016B660000-0x000002016B672000-memory.dmp

Filesize
72KB

Download
memory/2532-91-0x000002016BA90000-0x000002016BC39000-memory.dmp

Filesize
1.7MB

Download
memory/2532-0-0x00007FFE7B8E3000-0x00007FFE7B8E5000-memory.dmp

Filesize
8KB

Download
memory/2532-92-0x00007FFE7B8E0000-0x00007FFE7C3A1000-memory.dmp

Filesize
10.8MB

Download
memory/2532-2-0x00007FFE7B8E0000-0x00007FFE7C3A1000-memory.dmp

Filesize
10.8MB

Download
memory/2532-33-0x000002016B850000-0x000002016B8C6000-memory.dmp

Filesize
472KB

Download
memory/2532-34-0x000002016B8D0000-0x000002016B920000-memory.dmp

Filesize
320KB

Download
memory/2532-35-0x0000020152E30000-0x0000020152E4E000-memory.dmp

Filesize
120KB

Download
memory/2532-1-0x0000020151090000-0x00000201510D0000-memory.dmp

Filesize
256KB

Download
memory/2532-72-0x0000020152E60000-0x0000020152E6A000-memory.dmp

Filesize
40KB

Download
memory/3064-13-0x00007FFE7B8E0000-0x00007FFE7C3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3064-18-0x00007FFE7B8E0000-0x00007FFE7C3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3064-15-0x00007FFE7B8E0000-0x00007FFE7C3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3064-14-0x00007FFE7B8E0000-0x00007FFE7C3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3064-8-0x0000029036090000-0x00000290360B2000-memory.dmp

Filesize
136KB

Download
memory/4588-56-0x000001856B190000-0x000001856B3AC000-memory.dmp

Filesize
2.1MB

Download