umbral | 9c7acf37e5afc9eccc95c482058be6240659038f34a3b1237db66addb8bfe20c

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-09-2024 10:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral.exe
Size

229KB
MD5

9c5fa08220a406dd817047dd315c696e
SHA1

2062fbed265d945daf4937ed0a118378f29a9d66
SHA256

9c7acf37e5afc9eccc95c482058be6240659038f34a3b1237db66addb8bfe20c
SHA512

81f7d183f7019c1933ecb755b5c8527c9ad6b8ffba4b7a2999c31696d65d96cc1185918f267dd838e9a64fa7e6ff525e6a0a60e6bfcc2a920f60fe3323f70376
SSDEEP

6144:lloZMArIkd8g+EtXHkv/iD4suXUYe5xyTXKYZd8cYb8e1mfyi:noZHL+EP8suXUYe5xyTXKYZd8tk

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1732-1-0x0000000001370000-0x00000000013B0000-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
2756	powershell.exe
2784	powershell.exe
2980	powershell.exe
2156	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 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
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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1044	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2156	powershell.exe
2756	powershell.exe
2784	powershell.exe
2728	powershell.exe
2980	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1732	Umbral.exe
Token: SeDebugPrivilege	2156	powershell.exe
Token: SeDebugPrivilege	2756	powershell.exe
Token: SeDebugPrivilege	2784	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeIncreaseQuotaPrivilege	1480	wmic.exe
Token: SeSecurityPrivilege	1480	wmic.exe
Token: SeTakeOwnershipPrivilege	1480	wmic.exe
Token: SeLoadDriverPrivilege	1480	wmic.exe
Token: SeSystemProfilePrivilege	1480	wmic.exe
Token: SeSystemtimePrivilege	1480	wmic.exe
Token: SeProfSingleProcessPrivilege	1480	wmic.exe
Token: SeIncBasePriorityPrivilege	1480	wmic.exe
Token: SeCreatePagefilePrivilege	1480	wmic.exe
Token: SeBackupPrivilege	1480	wmic.exe
Token: SeRestorePrivilege	1480	wmic.exe
Token: SeShutdownPrivilege	1480	wmic.exe
Token: SeDebugPrivilege	1480	wmic.exe
Token: SeSystemEnvironmentPrivilege	1480	wmic.exe
Token: SeRemoteShutdownPrivilege	1480	wmic.exe
Token: SeUndockPrivilege	1480	wmic.exe
Token: SeManageVolumePrivilege	1480	wmic.exe
Token: 33	1480	wmic.exe
Token: 34	1480	wmic.exe
Token: 35	1480	wmic.exe
Token: SeIncreaseQuotaPrivilege	1480	wmic.exe
Token: SeSecurityPrivilege	1480	wmic.exe
Token: SeTakeOwnershipPrivilege	1480	wmic.exe
Token: SeLoadDriverPrivilege	1480	wmic.exe
Token: SeSystemProfilePrivilege	1480	wmic.exe
Token: SeSystemtimePrivilege	1480	wmic.exe
Token: SeProfSingleProcessPrivilege	1480	wmic.exe
Token: SeIncBasePriorityPrivilege	1480	wmic.exe
Token: SeCreatePagefilePrivilege	1480	wmic.exe
Token: SeBackupPrivilege	1480	wmic.exe
Token: SeRestorePrivilege	1480	wmic.exe
Token: SeShutdownPrivilege	1480	wmic.exe
Token: SeDebugPrivilege	1480	wmic.exe
Token: SeSystemEnvironmentPrivilege	1480	wmic.exe
Token: SeRemoteShutdownPrivilege	1480	wmic.exe
Token: SeUndockPrivilege	1480	wmic.exe
Token: SeManageVolumePrivilege	1480	wmic.exe
Token: 33	1480	wmic.exe
Token: 34	1480	wmic.exe
Token: 35	1480	wmic.exe
Token: SeIncreaseQuotaPrivilege	2848	wmic.exe
Token: SeSecurityPrivilege	2848	wmic.exe
Token: SeTakeOwnershipPrivilege	2848	wmic.exe
Token: SeLoadDriverPrivilege	2848	wmic.exe
Token: SeSystemProfilePrivilege	2848	wmic.exe
Token: SeSystemtimePrivilege	2848	wmic.exe
Token: SeProfSingleProcessPrivilege	2848	wmic.exe
Token: SeIncBasePriorityPrivilege	2848	wmic.exe
Token: SeCreatePagefilePrivilege	2848	wmic.exe
Token: SeBackupPrivilege	2848	wmic.exe
Token: SeRestorePrivilege	2848	wmic.exe
Token: SeShutdownPrivilege	2848	wmic.exe
Token: SeDebugPrivilege	2848	wmic.exe
Token: SeSystemEnvironmentPrivilege	2848	wmic.exe
Token: SeRemoteShutdownPrivilege	2848	wmic.exe
Token: SeUndockPrivilege	2848	wmic.exe
Token: SeManageVolumePrivilege	2848	wmic.exe
Token: 33	2848	wmic.exe
Token: 34	2848	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2156	1732	Umbral.exe	30
PID 1732 wrote to memory of 2156	1732	Umbral.exe	30
PID 1732 wrote to memory of 2156	1732	Umbral.exe	30
PID 1732 wrote to memory of 2756	1732	Umbral.exe	32
PID 1732 wrote to memory of 2756	1732	Umbral.exe	32
PID 1732 wrote to memory of 2756	1732	Umbral.exe	32
PID 1732 wrote to memory of 2784	1732	Umbral.exe	35
PID 1732 wrote to memory of 2784	1732	Umbral.exe	35
PID 1732 wrote to memory of 2784	1732	Umbral.exe	35
PID 1732 wrote to memory of 2728	1732	Umbral.exe	37
PID 1732 wrote to memory of 2728	1732	Umbral.exe	37
PID 1732 wrote to memory of 2728	1732	Umbral.exe	37
PID 1732 wrote to memory of 1480	1732	Umbral.exe	39
PID 1732 wrote to memory of 1480	1732	Umbral.exe	39
PID 1732 wrote to memory of 1480	1732	Umbral.exe	39
PID 1732 wrote to memory of 2848	1732	Umbral.exe	42
PID 1732 wrote to memory of 2848	1732	Umbral.exe	42
PID 1732 wrote to memory of 2848	1732	Umbral.exe	42
PID 1732 wrote to memory of 2708	1732	Umbral.exe	44
PID 1732 wrote to memory of 2708	1732	Umbral.exe	44
PID 1732 wrote to memory of 2708	1732	Umbral.exe	44
PID 1732 wrote to memory of 2980	1732	Umbral.exe	46
PID 1732 wrote to memory of 2980	1732	Umbral.exe	46
PID 1732 wrote to memory of 2980	1732	Umbral.exe	46
PID 1732 wrote to memory of 1044	1732	Umbral.exe	48
PID 1732 wrote to memory of 1044	1732	Umbral.exe	48
PID 1732 wrote to memory of 1044	1732	Umbral.exe	48

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:1732
- 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:2156
- 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:2756
- 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:2784
- 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:2728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2708
- 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:2980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1044

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
4041b69b91159b3dfe6bc048d567a3cc

SHA1
1719ace9464c8efc0bdc1c6ec0f29f8c61781a04

SHA256
58a37b015af007394d5966948916a142c4b50f616cceb4ed283cd362ba269335

SHA512
2e520f6aef68d80271239c44a2213c43e3339d7bd919a33512f8768dc4b26788bb08d969ff9b081f4b30bace1cb0e6eff28267071ea4e2558b81ab94e8fc1288

Download Submit
memory/1732-0-0x000007FEF5263000-0x000007FEF5264000-memory.dmp

Filesize
4KB

Download
memory/1732-1-0x0000000001370000-0x00000000013B0000-memory.dmp

Filesize
256KB

Download
memory/1732-2-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp

Filesize
9.9MB

Download
memory/1732-54-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp

Filesize
9.9MB

Download
memory/2156-12-0x000007FEECD80000-0x000007FEED71D000-memory.dmp

Filesize
9.6MB

Download
memory/2156-11-0x000007FEECD80000-0x000007FEED71D000-memory.dmp

Filesize
9.6MB

Download
memory/2156-10-0x000007FEECD80000-0x000007FEED71D000-memory.dmp

Filesize
9.6MB

Download
memory/2156-13-0x000007FEECD80000-0x000007FEED71D000-memory.dmp

Filesize
9.6MB

Download
memory/2156-14-0x000007FEECD80000-0x000007FEED71D000-memory.dmp

Filesize
9.6MB

Download
memory/2156-9-0x0000000002970000-0x0000000002978000-memory.dmp

Filesize
32KB

Download
memory/2156-8-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2156-7-0x000007FEED03E000-0x000007FEED03F000-memory.dmp

Filesize
4KB

Download
memory/2756-20-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2756-21-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2980-50-0x000000001B4C0000-0x000000001B7A2000-memory.dmp

Filesize
2.9MB

Download