umbral | d59f40a7e459e4f03cfafe017c0f9433714f8530757a674976a5dcc2bc68618d

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-11-2024 17:48

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General

Target

Umbral.exe
Size

230KB
MD5

d36aaa797c0db93779d1e7d23deb0ea1
SHA1

8c43cdc2bbd58bde7e445a9b26a745d091c93c5c
SHA256

d59f40a7e459e4f03cfafe017c0f9433714f8530757a674976a5dcc2bc68618d
SHA512

cf192d81fb909a91b989e50b7c0bb1092f130b3394b4205ce46afa9f2070f17a6461366dbad7bbc721d8449facaf2864203d274afcd95b65d3420070c0adb9e7
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4OGsLCg/7IiR0STTKEJ/b8e1mVni:noZtL+EP8OGsLCg/7IiR0STTKE1r

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2748-1-0x0000000000320000-0x0000000000360000-memory.dmp	family_umbral

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

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
2456	powershell.exe
1500	powershell.exe
2560	powershell.exe
1856	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.exe

Deletes itself 1 IoCs

pid	Process
2136	cmd.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
9	discord.com
10	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
6	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
2136	cmd.exe
1952	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
704	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1952	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2748	Umbral.exe
2456	powershell.exe
1500	powershell.exe
2560	powershell.exe
2484	powershell.exe
1856	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2780	wmic.exe
Token: SeSecurityPrivilege	2780	wmic.exe
Token: SeTakeOwnershipPrivilege	2780	wmic.exe
Token: SeLoadDriverPrivilege	2780	wmic.exe
Token: SeSystemProfilePrivilege	2780	wmic.exe
Token: SeSystemtimePrivilege	2780	wmic.exe
Token: SeProfSingleProcessPrivilege	2780	wmic.exe
Token: SeIncBasePriorityPrivilege	2780	wmic.exe
Token: SeCreatePagefilePrivilege	2780	wmic.exe
Token: SeBackupPrivilege	2780	wmic.exe
Token: SeRestorePrivilege	2780	wmic.exe
Token: SeShutdownPrivilege	2780	wmic.exe
Token: SeDebugPrivilege	2780	wmic.exe
Token: SeSystemEnvironmentPrivilege	2780	wmic.exe
Token: SeRemoteShutdownPrivilege	2780	wmic.exe
Token: SeUndockPrivilege	2780	wmic.exe
Token: SeManageVolumePrivilege	2780	wmic.exe
Token: 33	2780	wmic.exe
Token: 34	2780	wmic.exe
Token: 35	2780	wmic.exe
Token: SeIncreaseQuotaPrivilege	2780	wmic.exe
Token: SeSecurityPrivilege	2780	wmic.exe
Token: SeTakeOwnershipPrivilege	2780	wmic.exe
Token: SeLoadDriverPrivilege	2780	wmic.exe
Token: SeSystemProfilePrivilege	2780	wmic.exe
Token: SeSystemtimePrivilege	2780	wmic.exe
Token: SeProfSingleProcessPrivilege	2780	wmic.exe
Token: SeIncBasePriorityPrivilege	2780	wmic.exe
Token: SeCreatePagefilePrivilege	2780	wmic.exe
Token: SeBackupPrivilege	2780	wmic.exe
Token: SeRestorePrivilege	2780	wmic.exe
Token: SeShutdownPrivilege	2780	wmic.exe
Token: SeDebugPrivilege	2780	wmic.exe
Token: SeSystemEnvironmentPrivilege	2780	wmic.exe
Token: SeRemoteShutdownPrivilege	2780	wmic.exe
Token: SeUndockPrivilege	2780	wmic.exe
Token: SeManageVolumePrivilege	2780	wmic.exe
Token: 33	2780	wmic.exe
Token: 34	2780	wmic.exe
Token: 35	2780	wmic.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	2484	powershell.exe
Token: SeIncreaseQuotaPrivilege	1332	wmic.exe
Token: SeSecurityPrivilege	1332	wmic.exe
Token: SeTakeOwnershipPrivilege	1332	wmic.exe
Token: SeLoadDriverPrivilege	1332	wmic.exe
Token: SeSystemProfilePrivilege	1332	wmic.exe
Token: SeSystemtimePrivilege	1332	wmic.exe
Token: SeProfSingleProcessPrivilege	1332	wmic.exe
Token: SeIncBasePriorityPrivilege	1332	wmic.exe
Token: SeCreatePagefilePrivilege	1332	wmic.exe
Token: SeBackupPrivilege	1332	wmic.exe
Token: SeRestorePrivilege	1332	wmic.exe
Token: SeShutdownPrivilege	1332	wmic.exe
Token: SeDebugPrivilege	1332	wmic.exe
Token: SeSystemEnvironmentPrivilege	1332	wmic.exe
Token: SeRemoteShutdownPrivilege	1332	wmic.exe
Token: SeUndockPrivilege	1332	wmic.exe
Token: SeManageVolumePrivilege	1332	wmic.exe
Token: 33	1332	wmic.exe
Token: 34	1332	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 2780	2748	Umbral.exe	30
PID 2748 wrote to memory of 2780	2748	Umbral.exe	30
PID 2748 wrote to memory of 2780	2748	Umbral.exe	30
PID 2748 wrote to memory of 3048	2748	Umbral.exe	33
PID 2748 wrote to memory of 3048	2748	Umbral.exe	33
PID 2748 wrote to memory of 3048	2748	Umbral.exe	33
PID 2748 wrote to memory of 2456	2748	Umbral.exe	35
PID 2748 wrote to memory of 2456	2748	Umbral.exe	35
PID 2748 wrote to memory of 2456	2748	Umbral.exe	35
PID 2748 wrote to memory of 1500	2748	Umbral.exe	37
PID 2748 wrote to memory of 1500	2748	Umbral.exe	37
PID 2748 wrote to memory of 1500	2748	Umbral.exe	37
PID 2748 wrote to memory of 2560	2748	Umbral.exe	39
PID 2748 wrote to memory of 2560	2748	Umbral.exe	39
PID 2748 wrote to memory of 2560	2748	Umbral.exe	39
PID 2748 wrote to memory of 2484	2748	Umbral.exe	41
PID 2748 wrote to memory of 2484	2748	Umbral.exe	41
PID 2748 wrote to memory of 2484	2748	Umbral.exe	41
PID 2748 wrote to memory of 1332	2748	Umbral.exe	43
PID 2748 wrote to memory of 1332	2748	Umbral.exe	43
PID 2748 wrote to memory of 1332	2748	Umbral.exe	43
PID 2748 wrote to memory of 688	2748	Umbral.exe	45
PID 2748 wrote to memory of 688	2748	Umbral.exe	45
PID 2748 wrote to memory of 688	2748	Umbral.exe	45
PID 2748 wrote to memory of 1820	2748	Umbral.exe	47
PID 2748 wrote to memory of 1820	2748	Umbral.exe	47
PID 2748 wrote to memory of 1820	2748	Umbral.exe	47
PID 2748 wrote to memory of 1856	2748	Umbral.exe	49
PID 2748 wrote to memory of 1856	2748	Umbral.exe	49
PID 2748 wrote to memory of 1856	2748	Umbral.exe	49
PID 2748 wrote to memory of 704	2748	Umbral.exe	51
PID 2748 wrote to memory of 704	2748	Umbral.exe	51
PID 2748 wrote to memory of 704	2748	Umbral.exe	51
PID 2748 wrote to memory of 2136	2748	Umbral.exe	53
PID 2748 wrote to memory of 2136	2748	Umbral.exe	53
PID 2748 wrote to memory of 2136	2748	Umbral.exe	53
PID 2136 wrote to memory of 1952	2136	cmd.exe	55
PID 2136 wrote to memory of 1952	2136	cmd.exe	55
PID 2136 wrote to memory of 1952	2136	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3048	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:2748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2780
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:3048
- 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:2456
- 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:1500
- 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:2560
- 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:1332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1820
- 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:1856
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:704
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1952

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
770d18d4e87af3dee8e1034b7e6d8ea2

SHA1
46202978098dcd5520052a5f9f3504221f923803

SHA256
0002b3291a2f9a6cd8d1f58c999db8ad54196d7f557b5fef1e9fb918d176e786

SHA512
482a4fe082082974119582845d7edfa055269548f60654abceca557f2d8cb9457aedd547dda8a7389b3ddeed5e9a81f3f2a9f7467a4fd76a5e8eaf9de48439e0

Download Submit
memory/1500-14-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/1500-15-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download
memory/1856-43-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

Filesize
32KB

Download
memory/2456-7-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2456-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2748-0-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2748-1-0x0000000000320000-0x0000000000360000-memory.dmp

Filesize
256KB

Download
memory/2748-2-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-47-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download