umbral | 72f47523343d7d1ddc198998a6a411686dbfcc5a608314ba400957e369e24ff8

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
23-07-2024 20:48

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General

Target

Umbral.exe
Size

227KB
MD5

79ad93ed49ecead23248ec08cc51ecfd
SHA1

06340a50ce4fa06499e37070bbd70d6a0f25786f
SHA256

72f47523343d7d1ddc198998a6a411686dbfcc5a608314ba400957e369e24ff8
SHA512

083fff8df6f2d015cc46a05af331d8eb1dd1b91add76a3b47b818a594bc57a80d167cc6fdb2360de489c52b97e8d042abb207e0133d1a446850504c17ab5ffd7
SSDEEP

6144:eloZM9rIkd8g+EtXHkv/iD4n8jjSQPL4yBECDjazBb8e1mCi:IoZOL+EP8n8jjSQPL4yBECDjaNQ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2292-1-0x0000000000A70000-0x0000000000AB0000-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
2268	powershell.exe
2968	powershell.exe
2628	powershell.exe
2384	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2712	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
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

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2712	cmd.exe
2828	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1920	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2828	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2268	powershell.exe
2968	powershell.exe
2628	powershell.exe
2512	powershell.exe
2384	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2292	Umbral.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	2968	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	2512	powershell.exe
Token: SeIncreaseQuotaPrivilege	2656	wmic.exe
Token: SeSecurityPrivilege	2656	wmic.exe
Token: SeTakeOwnershipPrivilege	2656	wmic.exe
Token: SeLoadDriverPrivilege	2656	wmic.exe
Token: SeSystemProfilePrivilege	2656	wmic.exe
Token: SeSystemtimePrivilege	2656	wmic.exe
Token: SeProfSingleProcessPrivilege	2656	wmic.exe
Token: SeIncBasePriorityPrivilege	2656	wmic.exe
Token: SeCreatePagefilePrivilege	2656	wmic.exe
Token: SeBackupPrivilege	2656	wmic.exe
Token: SeRestorePrivilege	2656	wmic.exe
Token: SeShutdownPrivilege	2656	wmic.exe
Token: SeDebugPrivilege	2656	wmic.exe
Token: SeSystemEnvironmentPrivilege	2656	wmic.exe
Token: SeRemoteShutdownPrivilege	2656	wmic.exe
Token: SeUndockPrivilege	2656	wmic.exe
Token: SeManageVolumePrivilege	2656	wmic.exe
Token: 33	2656	wmic.exe
Token: 34	2656	wmic.exe
Token: 35	2656	wmic.exe
Token: SeIncreaseQuotaPrivilege	2656	wmic.exe
Token: SeSecurityPrivilege	2656	wmic.exe
Token: SeTakeOwnershipPrivilege	2656	wmic.exe
Token: SeLoadDriverPrivilege	2656	wmic.exe
Token: SeSystemProfilePrivilege	2656	wmic.exe
Token: SeSystemtimePrivilege	2656	wmic.exe
Token: SeProfSingleProcessPrivilege	2656	wmic.exe
Token: SeIncBasePriorityPrivilege	2656	wmic.exe
Token: SeCreatePagefilePrivilege	2656	wmic.exe
Token: SeBackupPrivilege	2656	wmic.exe
Token: SeRestorePrivilege	2656	wmic.exe
Token: SeShutdownPrivilege	2656	wmic.exe
Token: SeDebugPrivilege	2656	wmic.exe
Token: SeSystemEnvironmentPrivilege	2656	wmic.exe
Token: SeRemoteShutdownPrivilege	2656	wmic.exe
Token: SeUndockPrivilege	2656	wmic.exe
Token: SeManageVolumePrivilege	2656	wmic.exe
Token: 33	2656	wmic.exe
Token: 34	2656	wmic.exe
Token: 35	2656	wmic.exe
Token: SeIncreaseQuotaPrivilege	1968	wmic.exe
Token: SeSecurityPrivilege	1968	wmic.exe
Token: SeTakeOwnershipPrivilege	1968	wmic.exe
Token: SeLoadDriverPrivilege	1968	wmic.exe
Token: SeSystemProfilePrivilege	1968	wmic.exe
Token: SeSystemtimePrivilege	1968	wmic.exe
Token: SeProfSingleProcessPrivilege	1968	wmic.exe
Token: SeIncBasePriorityPrivilege	1968	wmic.exe
Token: SeCreatePagefilePrivilege	1968	wmic.exe
Token: SeBackupPrivilege	1968	wmic.exe
Token: SeRestorePrivilege	1968	wmic.exe
Token: SeShutdownPrivilege	1968	wmic.exe
Token: SeDebugPrivilege	1968	wmic.exe
Token: SeSystemEnvironmentPrivilege	1968	wmic.exe
Token: SeRemoteShutdownPrivilege	1968	wmic.exe
Token: SeUndockPrivilege	1968	wmic.exe
Token: SeManageVolumePrivilege	1968	wmic.exe
Token: 33	1968	wmic.exe
Token: 34	1968	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 2396	2292	Umbral.exe	28
PID 2292 wrote to memory of 2396	2292	Umbral.exe	28
PID 2292 wrote to memory of 2396	2292	Umbral.exe	28
PID 2292 wrote to memory of 2268	2292	Umbral.exe	30
PID 2292 wrote to memory of 2268	2292	Umbral.exe	30
PID 2292 wrote to memory of 2268	2292	Umbral.exe	30
PID 2292 wrote to memory of 2968	2292	Umbral.exe	32
PID 2292 wrote to memory of 2968	2292	Umbral.exe	32
PID 2292 wrote to memory of 2968	2292	Umbral.exe	32
PID 2292 wrote to memory of 2628	2292	Umbral.exe	34
PID 2292 wrote to memory of 2628	2292	Umbral.exe	34
PID 2292 wrote to memory of 2628	2292	Umbral.exe	34
PID 2292 wrote to memory of 2512	2292	Umbral.exe	36
PID 2292 wrote to memory of 2512	2292	Umbral.exe	36
PID 2292 wrote to memory of 2512	2292	Umbral.exe	36
PID 2292 wrote to memory of 2656	2292	Umbral.exe	38
PID 2292 wrote to memory of 2656	2292	Umbral.exe	38
PID 2292 wrote to memory of 2656	2292	Umbral.exe	38
PID 2292 wrote to memory of 1968	2292	Umbral.exe	41
PID 2292 wrote to memory of 1968	2292	Umbral.exe	41
PID 2292 wrote to memory of 1968	2292	Umbral.exe	41
PID 2292 wrote to memory of 1664	2292	Umbral.exe	43
PID 2292 wrote to memory of 1664	2292	Umbral.exe	43
PID 2292 wrote to memory of 1664	2292	Umbral.exe	43
PID 2292 wrote to memory of 2384	2292	Umbral.exe	45
PID 2292 wrote to memory of 2384	2292	Umbral.exe	45
PID 2292 wrote to memory of 2384	2292	Umbral.exe	45
PID 2292 wrote to memory of 1920	2292	Umbral.exe	47
PID 2292 wrote to memory of 1920	2292	Umbral.exe	47
PID 2292 wrote to memory of 1920	2292	Umbral.exe	47
PID 2292 wrote to memory of 2712	2292	Umbral.exe	49
PID 2292 wrote to memory of 2712	2292	Umbral.exe	49
PID 2292 wrote to memory of 2712	2292	Umbral.exe	49
PID 2712 wrote to memory of 2828	2712	cmd.exe	51
PID 2712 wrote to memory of 2828	2712	cmd.exe	51
PID 2712 wrote to memory of 2828	2712	cmd.exe	51

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2396	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2268
- 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:2968
- 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:2628
- 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:2512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1664
- 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:2384
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1920
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2828

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
974371ad4dedd3a54182a3acd8fcd20c

SHA1
b921377a070402d13abe42e2ec8600b0c0d3bf05

SHA256
8b1f807ad0ab14e089a41542954bd17c82f799124e375c2356e888d23bba79e2

SHA512
f401dc248f27670b8d417caa470807a70f7af17d8650f165aa6893e44800c099fb5f95695bfa18841fcb5adea1d85601df221276a1cd413ed066ab9f440c56b0

Download Submit
memory/2268-13-0x00000000021C4000-0x00000000021C7000-memory.dmp

Filesize
12KB

Download
memory/2268-12-0x000007FEEDBB0000-0x000007FEEE54D000-memory.dmp

Filesize
9.6MB

Download
memory/2268-9-0x00000000027A0000-0x00000000027A8000-memory.dmp

Filesize
32KB

Download
memory/2268-8-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2268-10-0x000007FEEDBB0000-0x000007FEEE54D000-memory.dmp

Filesize
9.6MB

Download
memory/2268-14-0x000007FEEDBB0000-0x000007FEEE54D000-memory.dmp

Filesize
9.6MB

Download
memory/2268-11-0x000007FEEDBB0000-0x000007FEEE54D000-memory.dmp

Filesize
9.6MB

Download
memory/2268-7-0x000007FEEDE6E000-0x000007FEEDE6F000-memory.dmp

Filesize
4KB

Download
memory/2292-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

Filesize
4KB

Download
memory/2292-2-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2292-1-0x0000000000A70000-0x0000000000AB0000-memory.dmp

Filesize
256KB

Download
memory/2292-52-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2968-20-0x000000001B890000-0x000000001BB72000-memory.dmp

Filesize
2.9MB

Download
memory/2968-21-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download