umbral | d6c6071e9ddf1c01281663073fe2a9fba3d3c4046975becbb0f6f9fa81cab6d3

Analysis

max time kernel
16s
max time network
17s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 01:23

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General

Target

Umbral.exe
Size

229KB
MD5

01e9ef5cd813c3738e9022a585850003
SHA1

e2e6b6c2784bbb7e27ba99ae16c2552e9af83e35
SHA256

d6c6071e9ddf1c01281663073fe2a9fba3d3c4046975becbb0f6f9fa81cab6d3
SHA512

76249812653272bf4de18bb46b28be191d7fb7806a1275bb14d03c5f75ea0e470a44d526fc0fdd9dfc6b357114f81d094b6c2e346a86fd9d3c5de59a06b294d8
SSDEEP

6144:9loZM9rIkd8g+EtXHkv/iD4cG69oOJBi+HaIJtM2jb8e1m7i:foZOL+EP8cG69oOJBi+HaIJtMgR

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1520-1-0x0000000000C20000-0x0000000000C60000-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
2980	powershell.exe
3024	powershell.exe
2476	powershell.exe
2348	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
2052	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
8	discord.com
9	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
2052	cmd.exe
2300	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2396	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2300	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2980	powershell.exe
3024	powershell.exe
2476	powershell.exe
1172	powershell.exe
2348	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	Umbral.exe
Token: SeDebugPrivilege	2980	powershell.exe
Token: SeDebugPrivilege	3024	powershell.exe
Token: SeDebugPrivilege	2476	powershell.exe
Token: SeDebugPrivilege	1172	powershell.exe
Token: SeIncreaseQuotaPrivilege	2796	wmic.exe
Token: SeSecurityPrivilege	2796	wmic.exe
Token: SeTakeOwnershipPrivilege	2796	wmic.exe
Token: SeLoadDriverPrivilege	2796	wmic.exe
Token: SeSystemProfilePrivilege	2796	wmic.exe
Token: SeSystemtimePrivilege	2796	wmic.exe
Token: SeProfSingleProcessPrivilege	2796	wmic.exe
Token: SeIncBasePriorityPrivilege	2796	wmic.exe
Token: SeCreatePagefilePrivilege	2796	wmic.exe
Token: SeBackupPrivilege	2796	wmic.exe
Token: SeRestorePrivilege	2796	wmic.exe
Token: SeShutdownPrivilege	2796	wmic.exe
Token: SeDebugPrivilege	2796	wmic.exe
Token: SeSystemEnvironmentPrivilege	2796	wmic.exe
Token: SeRemoteShutdownPrivilege	2796	wmic.exe
Token: SeUndockPrivilege	2796	wmic.exe
Token: SeManageVolumePrivilege	2796	wmic.exe
Token: 33	2796	wmic.exe
Token: 34	2796	wmic.exe
Token: 35	2796	wmic.exe
Token: SeIncreaseQuotaPrivilege	2796	wmic.exe
Token: SeSecurityPrivilege	2796	wmic.exe
Token: SeTakeOwnershipPrivilege	2796	wmic.exe
Token: SeLoadDriverPrivilege	2796	wmic.exe
Token: SeSystemProfilePrivilege	2796	wmic.exe
Token: SeSystemtimePrivilege	2796	wmic.exe
Token: SeProfSingleProcessPrivilege	2796	wmic.exe
Token: SeIncBasePriorityPrivilege	2796	wmic.exe
Token: SeCreatePagefilePrivilege	2796	wmic.exe
Token: SeBackupPrivilege	2796	wmic.exe
Token: SeRestorePrivilege	2796	wmic.exe
Token: SeShutdownPrivilege	2796	wmic.exe
Token: SeDebugPrivilege	2796	wmic.exe
Token: SeSystemEnvironmentPrivilege	2796	wmic.exe
Token: SeRemoteShutdownPrivilege	2796	wmic.exe
Token: SeUndockPrivilege	2796	wmic.exe
Token: SeManageVolumePrivilege	2796	wmic.exe
Token: 33	2796	wmic.exe
Token: 34	2796	wmic.exe
Token: 35	2796	wmic.exe
Token: SeIncreaseQuotaPrivilege	2628	wmic.exe
Token: SeSecurityPrivilege	2628	wmic.exe
Token: SeTakeOwnershipPrivilege	2628	wmic.exe
Token: SeLoadDriverPrivilege	2628	wmic.exe
Token: SeSystemProfilePrivilege	2628	wmic.exe
Token: SeSystemtimePrivilege	2628	wmic.exe
Token: SeProfSingleProcessPrivilege	2628	wmic.exe
Token: SeIncBasePriorityPrivilege	2628	wmic.exe
Token: SeCreatePagefilePrivilege	2628	wmic.exe
Token: SeBackupPrivilege	2628	wmic.exe
Token: SeRestorePrivilege	2628	wmic.exe
Token: SeShutdownPrivilege	2628	wmic.exe
Token: SeDebugPrivilege	2628	wmic.exe
Token: SeSystemEnvironmentPrivilege	2628	wmic.exe
Token: SeRemoteShutdownPrivilege	2628	wmic.exe
Token: SeUndockPrivilege	2628	wmic.exe
Token: SeManageVolumePrivilege	2628	wmic.exe
Token: 33	2628	wmic.exe
Token: 34	2628	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2924	1520	Umbral.exe	30
PID 1520 wrote to memory of 2924	1520	Umbral.exe	30
PID 1520 wrote to memory of 2924	1520	Umbral.exe	30
PID 1520 wrote to memory of 2980	1520	Umbral.exe	32
PID 1520 wrote to memory of 2980	1520	Umbral.exe	32
PID 1520 wrote to memory of 2980	1520	Umbral.exe	32
PID 1520 wrote to memory of 3024	1520	Umbral.exe	34
PID 1520 wrote to memory of 3024	1520	Umbral.exe	34
PID 1520 wrote to memory of 3024	1520	Umbral.exe	34
PID 1520 wrote to memory of 2476	1520	Umbral.exe	36
PID 1520 wrote to memory of 2476	1520	Umbral.exe	36
PID 1520 wrote to memory of 2476	1520	Umbral.exe	36
PID 1520 wrote to memory of 1172	1520	Umbral.exe	38
PID 1520 wrote to memory of 1172	1520	Umbral.exe	38
PID 1520 wrote to memory of 1172	1520	Umbral.exe	38
PID 1520 wrote to memory of 2796	1520	Umbral.exe	40
PID 1520 wrote to memory of 2796	1520	Umbral.exe	40
PID 1520 wrote to memory of 2796	1520	Umbral.exe	40
PID 1520 wrote to memory of 2628	1520	Umbral.exe	43
PID 1520 wrote to memory of 2628	1520	Umbral.exe	43
PID 1520 wrote to memory of 2628	1520	Umbral.exe	43
PID 1520 wrote to memory of 652	1520	Umbral.exe	45
PID 1520 wrote to memory of 652	1520	Umbral.exe	45
PID 1520 wrote to memory of 652	1520	Umbral.exe	45
PID 1520 wrote to memory of 2348	1520	Umbral.exe	47
PID 1520 wrote to memory of 2348	1520	Umbral.exe	47
PID 1520 wrote to memory of 2348	1520	Umbral.exe	47
PID 1520 wrote to memory of 2396	1520	Umbral.exe	49
PID 1520 wrote to memory of 2396	1520	Umbral.exe	49
PID 1520 wrote to memory of 2396	1520	Umbral.exe	49
PID 1520 wrote to memory of 2052	1520	Umbral.exe	51
PID 1520 wrote to memory of 2052	1520	Umbral.exe	51
PID 1520 wrote to memory of 2052	1520	Umbral.exe	51
PID 2052 wrote to memory of 2300	2052	cmd.exe	53
PID 2052 wrote to memory of 2300	2052	cmd.exe	53
PID 2052 wrote to memory of 2300	2052	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2924	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:1520
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2924
- 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:2980
- 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:3024
- 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:2476
- 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:1172
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2796
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:652
- 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:2348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2396
- 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:2052
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2300

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
29b7fce1c98e8228daa59e8e1f48ea28

SHA1
f64d40dd61810d4cafeedb01ecf65251aec49a6b

SHA256
f35b20d9426adf9bf6919ac14448d01a7fc45d1b4c7689d63787fd384f667716

SHA512
8aeaea9ca6026a7df53f512db3bc20968f7c11b13eedba4cfab4e3e04f9aef239076c76b4539ce67fe53026af886a5ec8f71c59884e5c1484f6bb45a20052e13

Download Submit
memory/1520-1-0x0000000000C20000-0x0000000000C60000-memory.dmp

Filesize
256KB

Download
memory/1520-2-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1520-57-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1520-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/1520-46-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1520-45-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2348-53-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download
memory/2980-11-0x000007FEEE160000-0x000007FEEEAFD000-memory.dmp

Filesize
9.6MB

Download
memory/2980-14-0x000007FEEE160000-0x000007FEEEAFD000-memory.dmp

Filesize
9.6MB

Download
memory/2980-15-0x000007FEEE160000-0x000007FEEEAFD000-memory.dmp

Filesize
9.6MB

Download
memory/2980-12-0x000007FEEE160000-0x000007FEEEAFD000-memory.dmp

Filesize
9.6MB

Download
memory/2980-13-0x000007FEEE160000-0x000007FEEEAFD000-memory.dmp

Filesize
9.6MB

Download
memory/2980-9-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2980-10-0x000007FEEE160000-0x000007FEEEAFD000-memory.dmp

Filesize
9.6MB

Download
memory/2980-8-0x000000001B6B0000-0x000000001B992000-memory.dmp

Filesize
2.9MB

Download
memory/2980-7-0x000007FEEE41E000-0x000007FEEE41F000-memory.dmp

Filesize
4KB

Download
memory/3024-21-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/3024-22-0x0000000001DF0000-0x0000000001DF8000-memory.dmp

Filesize
32KB

Download