umbral | 1ab54a5786eeedb01e74215a50a796fefbd12c47c0b864b1be5f6d45a2951bf4

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
08-08-2024 16:41

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

uhmuhh.exe
Size

229KB
MD5

0d407796194f47dd4739950f347631dc
SHA1

2e843294cd4ccbdcb53b0ca4cdcb0d6640d75615
SHA256

1ab54a5786eeedb01e74215a50a796fefbd12c47c0b864b1be5f6d45a2951bf4
SHA512

b70550be02cc4b622fa35c0189884104a2b6719e8b593e156b74874cffc835a906df3b746b2247c2bffffbb47be6470ba3ac16cb2c8e163785f64650c43a4b97
SSDEEP

6144:tloZMNrIkd8g+EtXHkv/iD41KaC9rI8j867NokRQg4db8e1mAG+Iwi:voZmL+EP81KaC9rI8j867NokRQgkC+Ip

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2044-1-0x0000000000E30000-0x0000000000E70000-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
1168	powershell.exe
2892	powershell.exe
2844	powershell.exe
1980	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
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
1528	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1168	powershell.exe
2892	powershell.exe
2844	powershell.exe
2608	powershell.exe
1980	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	uhmuhh.exe
Token: SeDebugPrivilege	1168	powershell.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	2844	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeIncreaseQuotaPrivilege	1520	wmic.exe
Token: SeSecurityPrivilege	1520	wmic.exe
Token: SeTakeOwnershipPrivilege	1520	wmic.exe
Token: SeLoadDriverPrivilege	1520	wmic.exe
Token: SeSystemProfilePrivilege	1520	wmic.exe
Token: SeSystemtimePrivilege	1520	wmic.exe
Token: SeProfSingleProcessPrivilege	1520	wmic.exe
Token: SeIncBasePriorityPrivilege	1520	wmic.exe
Token: SeCreatePagefilePrivilege	1520	wmic.exe
Token: SeBackupPrivilege	1520	wmic.exe
Token: SeRestorePrivilege	1520	wmic.exe
Token: SeShutdownPrivilege	1520	wmic.exe
Token: SeDebugPrivilege	1520	wmic.exe
Token: SeSystemEnvironmentPrivilege	1520	wmic.exe
Token: SeRemoteShutdownPrivilege	1520	wmic.exe
Token: SeUndockPrivilege	1520	wmic.exe
Token: SeManageVolumePrivilege	1520	wmic.exe
Token: 33	1520	wmic.exe
Token: 34	1520	wmic.exe
Token: 35	1520	wmic.exe
Token: SeIncreaseQuotaPrivilege	1520	wmic.exe
Token: SeSecurityPrivilege	1520	wmic.exe
Token: SeTakeOwnershipPrivilege	1520	wmic.exe
Token: SeLoadDriverPrivilege	1520	wmic.exe
Token: SeSystemProfilePrivilege	1520	wmic.exe
Token: SeSystemtimePrivilege	1520	wmic.exe
Token: SeProfSingleProcessPrivilege	1520	wmic.exe
Token: SeIncBasePriorityPrivilege	1520	wmic.exe
Token: SeCreatePagefilePrivilege	1520	wmic.exe
Token: SeBackupPrivilege	1520	wmic.exe
Token: SeRestorePrivilege	1520	wmic.exe
Token: SeShutdownPrivilege	1520	wmic.exe
Token: SeDebugPrivilege	1520	wmic.exe
Token: SeSystemEnvironmentPrivilege	1520	wmic.exe
Token: SeRemoteShutdownPrivilege	1520	wmic.exe
Token: SeUndockPrivilege	1520	wmic.exe
Token: SeManageVolumePrivilege	1520	wmic.exe
Token: 33	1520	wmic.exe
Token: 34	1520	wmic.exe
Token: 35	1520	wmic.exe
Token: SeIncreaseQuotaPrivilege	588	wmic.exe
Token: SeSecurityPrivilege	588	wmic.exe
Token: SeTakeOwnershipPrivilege	588	wmic.exe
Token: SeLoadDriverPrivilege	588	wmic.exe
Token: SeSystemProfilePrivilege	588	wmic.exe
Token: SeSystemtimePrivilege	588	wmic.exe
Token: SeProfSingleProcessPrivilege	588	wmic.exe
Token: SeIncBasePriorityPrivilege	588	wmic.exe
Token: SeCreatePagefilePrivilege	588	wmic.exe
Token: SeBackupPrivilege	588	wmic.exe
Token: SeRestorePrivilege	588	wmic.exe
Token: SeShutdownPrivilege	588	wmic.exe
Token: SeDebugPrivilege	588	wmic.exe
Token: SeSystemEnvironmentPrivilege	588	wmic.exe
Token: SeRemoteShutdownPrivilege	588	wmic.exe
Token: SeUndockPrivilege	588	wmic.exe
Token: SeManageVolumePrivilege	588	wmic.exe
Token: 33	588	wmic.exe
Token: 34	588	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 1168	2044	uhmuhh.exe	30
PID 2044 wrote to memory of 1168	2044	uhmuhh.exe	30
PID 2044 wrote to memory of 1168	2044	uhmuhh.exe	30
PID 2044 wrote to memory of 2892	2044	uhmuhh.exe	32
PID 2044 wrote to memory of 2892	2044	uhmuhh.exe	32
PID 2044 wrote to memory of 2892	2044	uhmuhh.exe	32
PID 2044 wrote to memory of 2844	2044	uhmuhh.exe	34
PID 2044 wrote to memory of 2844	2044	uhmuhh.exe	34
PID 2044 wrote to memory of 2844	2044	uhmuhh.exe	34
PID 2044 wrote to memory of 2608	2044	uhmuhh.exe	36
PID 2044 wrote to memory of 2608	2044	uhmuhh.exe	36
PID 2044 wrote to memory of 2608	2044	uhmuhh.exe	36
PID 2044 wrote to memory of 1520	2044	uhmuhh.exe	38
PID 2044 wrote to memory of 1520	2044	uhmuhh.exe	38
PID 2044 wrote to memory of 1520	2044	uhmuhh.exe	38
PID 2044 wrote to memory of 588	2044	uhmuhh.exe	41
PID 2044 wrote to memory of 588	2044	uhmuhh.exe	41
PID 2044 wrote to memory of 588	2044	uhmuhh.exe	41
PID 2044 wrote to memory of 2836	2044	uhmuhh.exe	43
PID 2044 wrote to memory of 2836	2044	uhmuhh.exe	43
PID 2044 wrote to memory of 2836	2044	uhmuhh.exe	43
PID 2044 wrote to memory of 1980	2044	uhmuhh.exe	45
PID 2044 wrote to memory of 1980	2044	uhmuhh.exe	45
PID 2044 wrote to memory of 1980	2044	uhmuhh.exe	45
PID 2044 wrote to memory of 1528	2044	uhmuhh.exe	47
PID 2044 wrote to memory of 1528	2044	uhmuhh.exe	47
PID 2044 wrote to memory of 1528	2044	uhmuhh.exe	47

C:\Users\Admin\AppData\Local\Temp\uhmuhh.exe
"C:\Users\Admin\AppData\Local\Temp\uhmuhh.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\uhmuhh.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1168
- 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:2892
- 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:2844
- 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:2608
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1520
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:588
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2836
- 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:1980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1528

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
9e12f8b76b10084dab51c7760502f982

SHA1
aaa65a3f6953eef8903223a60ab30e3f1ade0e88

SHA256
fdcbc18b607ce7e25b558326f9a48716fb7cc751ec9e4b1bdb696aeccaf4030e

SHA512
a66c6053681d0c4e733dff32b008526580e1e49379c8b390901319227c84205d149fde8eb53047fc9c89f76de09ac52bddac0f0c639b1afc057de848418dc3ca

Download Submit
memory/1168-8-0x000000001B820000-0x000000001BB02000-memory.dmp

Filesize
2.9MB

Download
memory/1168-13-0x000007FEEDB90000-0x000007FEEE52D000-memory.dmp

Filesize
9.6MB

Download
memory/1168-15-0x000007FEEDB90000-0x000007FEEE52D000-memory.dmp

Filesize
9.6MB

Download
memory/1168-9-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/1168-10-0x000007FEEDB90000-0x000007FEEE52D000-memory.dmp

Filesize
9.6MB

Download
memory/1168-11-0x000007FEEDB90000-0x000007FEEE52D000-memory.dmp

Filesize
9.6MB

Download
memory/1168-12-0x000007FEEDB90000-0x000007FEEE52D000-memory.dmp

Filesize
9.6MB

Download
memory/1168-7-0x000007FEEDE4E000-0x000007FEEDE4F000-memory.dmp

Filesize
4KB

Download
memory/1168-14-0x000007FEEDB90000-0x000007FEEE52D000-memory.dmp

Filesize
9.6MB

Download
memory/2044-0-0x000007FEF5953000-0x000007FEF5954000-memory.dmp

Filesize
4KB

Download
memory/2044-2-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download
memory/2044-1-0x0000000000E30000-0x0000000000E70000-memory.dmp

Filesize
256KB

Download
memory/2044-51-0x000007FEF5950000-0x000007FEF633C000-memory.dmp

Filesize
9.9MB

Download
memory/2892-21-0x000000001B7B0000-0x000000001BA92000-memory.dmp

Filesize
2.9MB

Download
memory/2892-22-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download