umbral | 44a1693b64e6cb0054ab2d7188af6c9f213ba2a65cf278b6f3857ab462cf30a2

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
28-01-2025 03:01

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General

Target

Umbral.exe
Size

230KB
MD5

38b42800e087dcee9961a8e80318d6f2
SHA1

36893cfd322a6021d8048ca6971fc094de6a9f7c
SHA256

44a1693b64e6cb0054ab2d7188af6c9f213ba2a65cf278b6f3857ab462cf30a2
SHA512

5c1d1065e8d076abeabe473f184e7561a2bc9b8b1486b3bff7540e736aa700a93a4879f97f70e176044089ca6eb0462725f26cdd3cb78190de62a62252cb6039
SSDEEP

6144:uloZM+rIkd8g+EtXHkv/iD4K8Nqbw2xpapPyAxVkK6b8e1myui:4oZtL+EP83Nqbw2xpapPyAxVkdXD

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/272-1-0x0000000001210000-0x0000000001250000-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
2760	powershell.exe
1860	powershell.exe
276	powershell.exe
1796	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
2572	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
2572	cmd.exe
296	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1956	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
296	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
272	Umbral.exe
2760	powershell.exe
276	powershell.exe
1796	powershell.exe
2008	powershell.exe
1860	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	272	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2724	wmic.exe
Token: SeSecurityPrivilege	2724	wmic.exe
Token: SeTakeOwnershipPrivilege	2724	wmic.exe
Token: SeLoadDriverPrivilege	2724	wmic.exe
Token: SeSystemProfilePrivilege	2724	wmic.exe
Token: SeSystemtimePrivilege	2724	wmic.exe
Token: SeProfSingleProcessPrivilege	2724	wmic.exe
Token: SeIncBasePriorityPrivilege	2724	wmic.exe
Token: SeCreatePagefilePrivilege	2724	wmic.exe
Token: SeBackupPrivilege	2724	wmic.exe
Token: SeRestorePrivilege	2724	wmic.exe
Token: SeShutdownPrivilege	2724	wmic.exe
Token: SeDebugPrivilege	2724	wmic.exe
Token: SeSystemEnvironmentPrivilege	2724	wmic.exe
Token: SeRemoteShutdownPrivilege	2724	wmic.exe
Token: SeUndockPrivilege	2724	wmic.exe
Token: SeManageVolumePrivilege	2724	wmic.exe
Token: 33	2724	wmic.exe
Token: 34	2724	wmic.exe
Token: 35	2724	wmic.exe
Token: SeIncreaseQuotaPrivilege	2724	wmic.exe
Token: SeSecurityPrivilege	2724	wmic.exe
Token: SeTakeOwnershipPrivilege	2724	wmic.exe
Token: SeLoadDriverPrivilege	2724	wmic.exe
Token: SeSystemProfilePrivilege	2724	wmic.exe
Token: SeSystemtimePrivilege	2724	wmic.exe
Token: SeProfSingleProcessPrivilege	2724	wmic.exe
Token: SeIncBasePriorityPrivilege	2724	wmic.exe
Token: SeCreatePagefilePrivilege	2724	wmic.exe
Token: SeBackupPrivilege	2724	wmic.exe
Token: SeRestorePrivilege	2724	wmic.exe
Token: SeShutdownPrivilege	2724	wmic.exe
Token: SeDebugPrivilege	2724	wmic.exe
Token: SeSystemEnvironmentPrivilege	2724	wmic.exe
Token: SeRemoteShutdownPrivilege	2724	wmic.exe
Token: SeUndockPrivilege	2724	wmic.exe
Token: SeManageVolumePrivilege	2724	wmic.exe
Token: 33	2724	wmic.exe
Token: 34	2724	wmic.exe
Token: 35	2724	wmic.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	276	powershell.exe
Token: SeDebugPrivilege	1796	powershell.exe
Token: SeDebugPrivilege	2008	powershell.exe
Token: SeIncreaseQuotaPrivilege	3040	wmic.exe
Token: SeSecurityPrivilege	3040	wmic.exe
Token: SeTakeOwnershipPrivilege	3040	wmic.exe
Token: SeLoadDriverPrivilege	3040	wmic.exe
Token: SeSystemProfilePrivilege	3040	wmic.exe
Token: SeSystemtimePrivilege	3040	wmic.exe
Token: SeProfSingleProcessPrivilege	3040	wmic.exe
Token: SeIncBasePriorityPrivilege	3040	wmic.exe
Token: SeCreatePagefilePrivilege	3040	wmic.exe
Token: SeBackupPrivilege	3040	wmic.exe
Token: SeRestorePrivilege	3040	wmic.exe
Token: SeShutdownPrivilege	3040	wmic.exe
Token: SeDebugPrivilege	3040	wmic.exe
Token: SeSystemEnvironmentPrivilege	3040	wmic.exe
Token: SeRemoteShutdownPrivilege	3040	wmic.exe
Token: SeUndockPrivilege	3040	wmic.exe
Token: SeManageVolumePrivilege	3040	wmic.exe
Token: 33	3040	wmic.exe
Token: 34	3040	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 272 wrote to memory of 2724	272	Umbral.exe	31
PID 272 wrote to memory of 2724	272	Umbral.exe	31
PID 272 wrote to memory of 2724	272	Umbral.exe	31
PID 272 wrote to memory of 2140	272	Umbral.exe	34
PID 272 wrote to memory of 2140	272	Umbral.exe	34
PID 272 wrote to memory of 2140	272	Umbral.exe	34
PID 272 wrote to memory of 2760	272	Umbral.exe	36
PID 272 wrote to memory of 2760	272	Umbral.exe	36
PID 272 wrote to memory of 2760	272	Umbral.exe	36
PID 272 wrote to memory of 276	272	Umbral.exe	38
PID 272 wrote to memory of 276	272	Umbral.exe	38
PID 272 wrote to memory of 276	272	Umbral.exe	38
PID 272 wrote to memory of 1796	272	Umbral.exe	40
PID 272 wrote to memory of 1796	272	Umbral.exe	40
PID 272 wrote to memory of 1796	272	Umbral.exe	40
PID 272 wrote to memory of 2008	272	Umbral.exe	42
PID 272 wrote to memory of 2008	272	Umbral.exe	42
PID 272 wrote to memory of 2008	272	Umbral.exe	42
PID 272 wrote to memory of 3040	272	Umbral.exe	44
PID 272 wrote to memory of 3040	272	Umbral.exe	44
PID 272 wrote to memory of 3040	272	Umbral.exe	44
PID 272 wrote to memory of 2732	272	Umbral.exe	46
PID 272 wrote to memory of 2732	272	Umbral.exe	46
PID 272 wrote to memory of 2732	272	Umbral.exe	46
PID 272 wrote to memory of 316	272	Umbral.exe	48
PID 272 wrote to memory of 316	272	Umbral.exe	48
PID 272 wrote to memory of 316	272	Umbral.exe	48
PID 272 wrote to memory of 1860	272	Umbral.exe	50
PID 272 wrote to memory of 1860	272	Umbral.exe	50
PID 272 wrote to memory of 1860	272	Umbral.exe	50
PID 272 wrote to memory of 1956	272	Umbral.exe	52
PID 272 wrote to memory of 1956	272	Umbral.exe	52
PID 272 wrote to memory of 1956	272	Umbral.exe	52
PID 272 wrote to memory of 2572	272	Umbral.exe	54
PID 272 wrote to memory of 2572	272	Umbral.exe	54
PID 272 wrote to memory of 2572	272	Umbral.exe	54
PID 2572 wrote to memory of 296	2572	cmd.exe	56
PID 2572 wrote to memory of 296	2572	cmd.exe	56
PID 2572 wrote to memory of 296	2572	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2140	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:272
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2724
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2140
- 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:2760
- 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:276
- 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:1796
- 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:2008
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2732
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:316
- 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:1860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1956
- 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:2572
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:296

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
06324ae8db8377dd7ee1ecc91db0c456

SHA1
8d7454f672997c99315fcacb8c6a23d8d9ce1d7c

SHA256
b7a2423ae5fdd9889316ae3a58d884839839082953d34d379b6fbea637aa4dbd

SHA512
bb217cec4f26d823d5d2c6ad828604cfc74e987f7183cd92d945bdaa1786185dd606c12cd2ed1559256118972a49fc4e6be56cb0dd4e3e29ddcba2db4f136240

Download Submit
memory/272-0-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/272-1-0x0000000001210000-0x0000000001250000-memory.dmp

Filesize
256KB

Download
memory/272-2-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/272-51-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/276-14-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/276-15-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/1860-46-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2760-7-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2760-8-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download