umbral | a0b244e1ee7d95f564857f7e481620731d347e5934f4bcc6098a76eb1b71a499

Analysis

max time kernel
18s
max time network
18s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
24-08-2024 18:37

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General

Target

Umbral.exe
Size

416KB
MD5

bc5dd701f57c7d57c143f1cfd0bb2e0c
SHA1

bd5cac1520ccb83442a96ac34cfccf2730591720
SHA256

a0b244e1ee7d95f564857f7e481620731d347e5934f4bcc6098a76eb1b71a499
SHA512

dca39c9fab005131247cbddbdf3a6a77eeaa9cf3f4c09a9cd3bf2641add1818092e314c9225060b809a45fb1c66db0de2a7d64dfaaeb3b2f73767faab4e897a2
SSDEEP

12288:5oZtL+EP8HE3APlO2Z6c1niinSFDA2oCMt/YdD:XI8k3APlO2Z6c1niinSJ6/W

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1656-1-0x0000000000150000-0x00000000001BE000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2688	powershell.exe
1888	powershell.exe
324	powershell.exe
3000	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
2564	cmd.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
10	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
2564	cmd.exe
2580	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1968	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2580	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1656	Umbral.exe
3000	powershell.exe
2688	powershell.exe
1888	powershell.exe
2140	powershell.exe
324	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1656	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2884	wmic.exe
Token: SeSecurityPrivilege	2884	wmic.exe
Token: SeTakeOwnershipPrivilege	2884	wmic.exe
Token: SeLoadDriverPrivilege	2884	wmic.exe
Token: SeSystemProfilePrivilege	2884	wmic.exe
Token: SeSystemtimePrivilege	2884	wmic.exe
Token: SeProfSingleProcessPrivilege	2884	wmic.exe
Token: SeIncBasePriorityPrivilege	2884	wmic.exe
Token: SeCreatePagefilePrivilege	2884	wmic.exe
Token: SeBackupPrivilege	2884	wmic.exe
Token: SeRestorePrivilege	2884	wmic.exe
Token: SeShutdownPrivilege	2884	wmic.exe
Token: SeDebugPrivilege	2884	wmic.exe
Token: SeSystemEnvironmentPrivilege	2884	wmic.exe
Token: SeRemoteShutdownPrivilege	2884	wmic.exe
Token: SeUndockPrivilege	2884	wmic.exe
Token: SeManageVolumePrivilege	2884	wmic.exe
Token: 33	2884	wmic.exe
Token: 34	2884	wmic.exe
Token: 35	2884	wmic.exe
Token: SeIncreaseQuotaPrivilege	2884	wmic.exe
Token: SeSecurityPrivilege	2884	wmic.exe
Token: SeTakeOwnershipPrivilege	2884	wmic.exe
Token: SeLoadDriverPrivilege	2884	wmic.exe
Token: SeSystemProfilePrivilege	2884	wmic.exe
Token: SeSystemtimePrivilege	2884	wmic.exe
Token: SeProfSingleProcessPrivilege	2884	wmic.exe
Token: SeIncBasePriorityPrivilege	2884	wmic.exe
Token: SeCreatePagefilePrivilege	2884	wmic.exe
Token: SeBackupPrivilege	2884	wmic.exe
Token: SeRestorePrivilege	2884	wmic.exe
Token: SeShutdownPrivilege	2884	wmic.exe
Token: SeDebugPrivilege	2884	wmic.exe
Token: SeSystemEnvironmentPrivilege	2884	wmic.exe
Token: SeRemoteShutdownPrivilege	2884	wmic.exe
Token: SeUndockPrivilege	2884	wmic.exe
Token: SeManageVolumePrivilege	2884	wmic.exe
Token: 33	2884	wmic.exe
Token: 34	2884	wmic.exe
Token: 35	2884	wmic.exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	1888	powershell.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeIncreaseQuotaPrivilege	2956	wmic.exe
Token: SeSecurityPrivilege	2956	wmic.exe
Token: SeTakeOwnershipPrivilege	2956	wmic.exe
Token: SeLoadDriverPrivilege	2956	wmic.exe
Token: SeSystemProfilePrivilege	2956	wmic.exe
Token: SeSystemtimePrivilege	2956	wmic.exe
Token: SeProfSingleProcessPrivilege	2956	wmic.exe
Token: SeIncBasePriorityPrivilege	2956	wmic.exe
Token: SeCreatePagefilePrivilege	2956	wmic.exe
Token: SeBackupPrivilege	2956	wmic.exe
Token: SeRestorePrivilege	2956	wmic.exe
Token: SeShutdownPrivilege	2956	wmic.exe
Token: SeDebugPrivilege	2956	wmic.exe
Token: SeSystemEnvironmentPrivilege	2956	wmic.exe
Token: SeRemoteShutdownPrivilege	2956	wmic.exe
Token: SeUndockPrivilege	2956	wmic.exe
Token: SeManageVolumePrivilege	2956	wmic.exe
Token: 33	2956	wmic.exe
Token: 34	2956	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 2884	1656	Umbral.exe	29
PID 1656 wrote to memory of 2884	1656	Umbral.exe	29
PID 1656 wrote to memory of 2884	1656	Umbral.exe	29
PID 1656 wrote to memory of 2108	1656	Umbral.exe	32
PID 1656 wrote to memory of 2108	1656	Umbral.exe	32
PID 1656 wrote to memory of 2108	1656	Umbral.exe	32
PID 1656 wrote to memory of 3000	1656	Umbral.exe	34
PID 1656 wrote to memory of 3000	1656	Umbral.exe	34
PID 1656 wrote to memory of 3000	1656	Umbral.exe	34
PID 1656 wrote to memory of 2688	1656	Umbral.exe	36
PID 1656 wrote to memory of 2688	1656	Umbral.exe	36
PID 1656 wrote to memory of 2688	1656	Umbral.exe	36
PID 1656 wrote to memory of 1888	1656	Umbral.exe	38
PID 1656 wrote to memory of 1888	1656	Umbral.exe	38
PID 1656 wrote to memory of 1888	1656	Umbral.exe	38
PID 1656 wrote to memory of 2140	1656	Umbral.exe	40
PID 1656 wrote to memory of 2140	1656	Umbral.exe	40
PID 1656 wrote to memory of 2140	1656	Umbral.exe	40
PID 1656 wrote to memory of 2956	1656	Umbral.exe	42
PID 1656 wrote to memory of 2956	1656	Umbral.exe	42
PID 1656 wrote to memory of 2956	1656	Umbral.exe	42
PID 1656 wrote to memory of 2924	1656	Umbral.exe	44
PID 1656 wrote to memory of 2924	1656	Umbral.exe	44
PID 1656 wrote to memory of 2924	1656	Umbral.exe	44
PID 1656 wrote to memory of 2424	1656	Umbral.exe	46
PID 1656 wrote to memory of 2424	1656	Umbral.exe	46
PID 1656 wrote to memory of 2424	1656	Umbral.exe	46
PID 1656 wrote to memory of 324	1656	Umbral.exe	48
PID 1656 wrote to memory of 324	1656	Umbral.exe	48
PID 1656 wrote to memory of 324	1656	Umbral.exe	48
PID 1656 wrote to memory of 1968	1656	Umbral.exe	50
PID 1656 wrote to memory of 1968	1656	Umbral.exe	50
PID 1656 wrote to memory of 1968	1656	Umbral.exe	50
PID 1656 wrote to memory of 2564	1656	Umbral.exe	52
PID 1656 wrote to memory of 2564	1656	Umbral.exe	52
PID 1656 wrote to memory of 2564	1656	Umbral.exe	52
PID 2564 wrote to memory of 2580	2564	cmd.exe	54
PID 2564 wrote to memory of 2580	2564	cmd.exe	54
PID 2564 wrote to memory of 2580	2564	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2108	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:1656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2884
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2108
- 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:3000
- 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:2688
- 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:1888
- 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:2140
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2924
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2424
- 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:324
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1968
- 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:2564
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2580

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
f9bc27bb87f5bbfec1a4d319fd3ab6f9

SHA1
2bef091248366d36d702717fd48743fba711d761

SHA256
6ebc42a8c1b3611723b5122e2118caeb1629b28776651aa46857c6a08ac36d5f

SHA512
9558967e180f119c6e20d114c351b8956235dedd5cfa867b9459b0cf16ca4f19e24820c3069b853a36c9fb8a49d6012d07bcde6145be277d972aa64af4144cf0

Download Submit
memory/324-45-0x00000000023F0000-0x00000000023F8000-memory.dmp

Filesize
32KB

Download
memory/1656-35-0x000007FEF5B73000-0x000007FEF5B74000-memory.dmp

Filesize
4KB

Download
memory/1656-1-0x0000000000150000-0x00000000001BE000-memory.dmp

Filesize
440KB

Download
memory/1656-2-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/1656-49-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/1656-0-0x000007FEF5B73000-0x000007FEF5B74000-memory.dmp

Filesize
4KB

Download
memory/1656-39-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/2688-15-0x00000000024A0000-0x00000000024A8000-memory.dmp

Filesize
32KB

Download
memory/2688-14-0x000000001B2B0000-0x000000001B592000-memory.dmp

Filesize
2.9MB

Download
memory/3000-8-0x0000000002510000-0x0000000002518000-memory.dmp

Filesize
32KB

Download
memory/3000-7-0x000000001B4A0000-0x000000001B782000-memory.dmp

Filesize
2.9MB

Download