umbral | 3ee237cbbcd082d1668f330d6c2aff90e4d965b343aca348d64a3c23cf394b67

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
31-10-2024 05:21

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General

Target

dmbral.exe
Size

227KB
MD5

5bf15d22b81f8487a3ba892c44b48e80
SHA1

b1e36876f0e7788a646844f08f32a0d17ae335bf
SHA256

3ee237cbbcd082d1668f330d6c2aff90e4d965b343aca348d64a3c23cf394b67
SHA512

f7889333a476acb65a5a9a5e4076d9060471a28dfda46e67955c849f54b13c74aafa408de9ed9b6c4f3be7b8990c873407927fdd87afee7ef7b6a0a7d9e3c6f2
SSDEEP

6144:eloZM+rIkd8g+EtXHkv/iD4Sf5pBPUonVWvRsY9w4b8e1mBii:IoZ1L+EP8Sf5pBPUonVWvRsY9hO

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2468-1-0x0000000000C10000-0x0000000000C50000-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
2748	powershell.exe
296	powershell.exe
2964	powershell.exe
2624	powershell.exe

Deletes itself 1 IoCs

pid	Process
2272	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
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

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
2272	cmd.exe
2132	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2100	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2132	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2748	powershell.exe
2964	powershell.exe
2624	powershell.exe
2944	powershell.exe
296	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2468	dmbral.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	2964	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2944	powershell.exe
Token: SeIncreaseQuotaPrivilege	1508	wmic.exe
Token: SeSecurityPrivilege	1508	wmic.exe
Token: SeTakeOwnershipPrivilege	1508	wmic.exe
Token: SeLoadDriverPrivilege	1508	wmic.exe
Token: SeSystemProfilePrivilege	1508	wmic.exe
Token: SeSystemtimePrivilege	1508	wmic.exe
Token: SeProfSingleProcessPrivilege	1508	wmic.exe
Token: SeIncBasePriorityPrivilege	1508	wmic.exe
Token: SeCreatePagefilePrivilege	1508	wmic.exe
Token: SeBackupPrivilege	1508	wmic.exe
Token: SeRestorePrivilege	1508	wmic.exe
Token: SeShutdownPrivilege	1508	wmic.exe
Token: SeDebugPrivilege	1508	wmic.exe
Token: SeSystemEnvironmentPrivilege	1508	wmic.exe
Token: SeRemoteShutdownPrivilege	1508	wmic.exe
Token: SeUndockPrivilege	1508	wmic.exe
Token: SeManageVolumePrivilege	1508	wmic.exe
Token: 33	1508	wmic.exe
Token: 34	1508	wmic.exe
Token: 35	1508	wmic.exe
Token: SeIncreaseQuotaPrivilege	1508	wmic.exe
Token: SeSecurityPrivilege	1508	wmic.exe
Token: SeTakeOwnershipPrivilege	1508	wmic.exe
Token: SeLoadDriverPrivilege	1508	wmic.exe
Token: SeSystemProfilePrivilege	1508	wmic.exe
Token: SeSystemtimePrivilege	1508	wmic.exe
Token: SeProfSingleProcessPrivilege	1508	wmic.exe
Token: SeIncBasePriorityPrivilege	1508	wmic.exe
Token: SeCreatePagefilePrivilege	1508	wmic.exe
Token: SeBackupPrivilege	1508	wmic.exe
Token: SeRestorePrivilege	1508	wmic.exe
Token: SeShutdownPrivilege	1508	wmic.exe
Token: SeDebugPrivilege	1508	wmic.exe
Token: SeSystemEnvironmentPrivilege	1508	wmic.exe
Token: SeRemoteShutdownPrivilege	1508	wmic.exe
Token: SeUndockPrivilege	1508	wmic.exe
Token: SeManageVolumePrivilege	1508	wmic.exe
Token: 33	1508	wmic.exe
Token: 34	1508	wmic.exe
Token: 35	1508	wmic.exe
Token: SeIncreaseQuotaPrivilege	1976	wmic.exe
Token: SeSecurityPrivilege	1976	wmic.exe
Token: SeTakeOwnershipPrivilege	1976	wmic.exe
Token: SeLoadDriverPrivilege	1976	wmic.exe
Token: SeSystemProfilePrivilege	1976	wmic.exe
Token: SeSystemtimePrivilege	1976	wmic.exe
Token: SeProfSingleProcessPrivilege	1976	wmic.exe
Token: SeIncBasePriorityPrivilege	1976	wmic.exe
Token: SeCreatePagefilePrivilege	1976	wmic.exe
Token: SeBackupPrivilege	1976	wmic.exe
Token: SeRestorePrivilege	1976	wmic.exe
Token: SeShutdownPrivilege	1976	wmic.exe
Token: SeDebugPrivilege	1976	wmic.exe
Token: SeSystemEnvironmentPrivilege	1976	wmic.exe
Token: SeRemoteShutdownPrivilege	1976	wmic.exe
Token: SeUndockPrivilege	1976	wmic.exe
Token: SeManageVolumePrivilege	1976	wmic.exe
Token: 33	1976	wmic.exe
Token: 34	1976	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2468 wrote to memory of 2708	2468	dmbral.exe	30
PID 2468 wrote to memory of 2708	2468	dmbral.exe	30
PID 2468 wrote to memory of 2708	2468	dmbral.exe	30
PID 2468 wrote to memory of 2748	2468	dmbral.exe	32
PID 2468 wrote to memory of 2748	2468	dmbral.exe	32
PID 2468 wrote to memory of 2748	2468	dmbral.exe	32
PID 2468 wrote to memory of 2964	2468	dmbral.exe	34
PID 2468 wrote to memory of 2964	2468	dmbral.exe	34
PID 2468 wrote to memory of 2964	2468	dmbral.exe	34
PID 2468 wrote to memory of 2624	2468	dmbral.exe	36
PID 2468 wrote to memory of 2624	2468	dmbral.exe	36
PID 2468 wrote to memory of 2624	2468	dmbral.exe	36
PID 2468 wrote to memory of 2944	2468	dmbral.exe	38
PID 2468 wrote to memory of 2944	2468	dmbral.exe	38
PID 2468 wrote to memory of 2944	2468	dmbral.exe	38
PID 2468 wrote to memory of 1508	2468	dmbral.exe	40
PID 2468 wrote to memory of 1508	2468	dmbral.exe	40
PID 2468 wrote to memory of 1508	2468	dmbral.exe	40
PID 2468 wrote to memory of 1976	2468	dmbral.exe	43
PID 2468 wrote to memory of 1976	2468	dmbral.exe	43
PID 2468 wrote to memory of 1976	2468	dmbral.exe	43
PID 2468 wrote to memory of 1608	2468	dmbral.exe	45
PID 2468 wrote to memory of 1608	2468	dmbral.exe	45
PID 2468 wrote to memory of 1608	2468	dmbral.exe	45
PID 2468 wrote to memory of 296	2468	dmbral.exe	47
PID 2468 wrote to memory of 296	2468	dmbral.exe	47
PID 2468 wrote to memory of 296	2468	dmbral.exe	47
PID 2468 wrote to memory of 2100	2468	dmbral.exe	49
PID 2468 wrote to memory of 2100	2468	dmbral.exe	49
PID 2468 wrote to memory of 2100	2468	dmbral.exe	49
PID 2468 wrote to memory of 2272	2468	dmbral.exe	51
PID 2468 wrote to memory of 2272	2468	dmbral.exe	51
PID 2468 wrote to memory of 2272	2468	dmbral.exe	51
PID 2272 wrote to memory of 2132	2272	cmd.exe	53
PID 2272 wrote to memory of 2132	2272	cmd.exe	53
PID 2272 wrote to memory of 2132	2272	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2708	attrib.exe

C:\Users\Admin\AppData\Local\Temp\dmbral.exe
"C:\Users\Admin\AppData\Local\Temp\dmbral.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2468
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\dmbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2708
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\dmbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2748
- 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:2964
- 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:2624
- 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:2944
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1508
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1608
- 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:296
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2100
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\dmbral.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2132

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
3d00aad1b88876152b6dc5e2272a42f8

SHA1
d44a3032a22eb206ca5b150a298bc0b0600b0812

SHA256
0b55b7581861fb33b8cc36187b00b2b364e4434e9c6cda43f09283b8d9b2496c

SHA512
f44d4c27e825a416dd87c2fc5a74b0b0d4167be8344fc9365fc2630ba85cd81fae1089476bff83d757e2f10a6ec91cebf8bb257fe9371939d417b103b63d72d4

Download Submit
memory/2468-1-0x0000000000C10000-0x0000000000C50000-memory.dmp

Filesize
256KB

Download
memory/2468-2-0x000007FEF5FE0000-0x000007FEF69CC000-memory.dmp

Filesize
9.9MB

Download
memory/2468-52-0x000007FEF5FE0000-0x000007FEF69CC000-memory.dmp

Filesize
9.9MB

Download
memory/2468-0-0x000007FEF5FE3000-0x000007FEF5FE4000-memory.dmp

Filesize
4KB

Download
memory/2748-9-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2748-11-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-12-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-13-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-14-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-15-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-10-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2748-8-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/2748-7-0x000007FEEDC6E000-0x000007FEEDC6F000-memory.dmp

Filesize
4KB

Download
memory/2964-21-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2964-22-0x00000000021D0000-0x00000000021D8000-memory.dmp

Filesize
32KB

Download