umbral | 8ff6ca14eac4b42391697608e3cf0c6fe433e58ac965bef66ec32888305464d9

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
26-08-2024 20:19

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General

Target

Umbral.exe
Size

232KB
MD5

b19a46354270983374d8a6c2e1de3eff
SHA1

1e0c163fd3d63d26dd3f271a3e348b3d69140c7d
SHA256

8ff6ca14eac4b42391697608e3cf0c6fe433e58ac965bef66ec32888305464d9
SHA512

829a6b6c93c5f98ac8b2633608c6d05247e8b84b9eb188ffaf69a6339019fd92772730325de9ef378812693203abe19cff289b1feb7ca8149dcbeb857d307b6d
SSDEEP

6144:BloZM+rIkd8g+EtXHkv/iD4yF4W4+ZRS23q459cTub8e1mQvi:zoZtL+EP8yF4W4+ZRS23q459cmW

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2848-1-0x0000000000160000-0x00000000001A0000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1144	powershell.exe
2980	powershell.exe
2168	powershell.exe
2580	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
1308	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
7	discord.com
8	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

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
1308	cmd.exe
2920	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1768	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2920	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2848	Umbral.exe
2580	powershell.exe
2980	powershell.exe
1144	powershell.exe
2896	powershell.exe
2168	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2832	wmic.exe
Token: SeSecurityPrivilege	2832	wmic.exe
Token: SeTakeOwnershipPrivilege	2832	wmic.exe
Token: SeLoadDriverPrivilege	2832	wmic.exe
Token: SeSystemProfilePrivilege	2832	wmic.exe
Token: SeSystemtimePrivilege	2832	wmic.exe
Token: SeProfSingleProcessPrivilege	2832	wmic.exe
Token: SeIncBasePriorityPrivilege	2832	wmic.exe
Token: SeCreatePagefilePrivilege	2832	wmic.exe
Token: SeBackupPrivilege	2832	wmic.exe
Token: SeRestorePrivilege	2832	wmic.exe
Token: SeShutdownPrivilege	2832	wmic.exe
Token: SeDebugPrivilege	2832	wmic.exe
Token: SeSystemEnvironmentPrivilege	2832	wmic.exe
Token: SeRemoteShutdownPrivilege	2832	wmic.exe
Token: SeUndockPrivilege	2832	wmic.exe
Token: SeManageVolumePrivilege	2832	wmic.exe
Token: 33	2832	wmic.exe
Token: 34	2832	wmic.exe
Token: 35	2832	wmic.exe
Token: SeIncreaseQuotaPrivilege	2832	wmic.exe
Token: SeSecurityPrivilege	2832	wmic.exe
Token: SeTakeOwnershipPrivilege	2832	wmic.exe
Token: SeLoadDriverPrivilege	2832	wmic.exe
Token: SeSystemProfilePrivilege	2832	wmic.exe
Token: SeSystemtimePrivilege	2832	wmic.exe
Token: SeProfSingleProcessPrivilege	2832	wmic.exe
Token: SeIncBasePriorityPrivilege	2832	wmic.exe
Token: SeCreatePagefilePrivilege	2832	wmic.exe
Token: SeBackupPrivilege	2832	wmic.exe
Token: SeRestorePrivilege	2832	wmic.exe
Token: SeShutdownPrivilege	2832	wmic.exe
Token: SeDebugPrivilege	2832	wmic.exe
Token: SeSystemEnvironmentPrivilege	2832	wmic.exe
Token: SeRemoteShutdownPrivilege	2832	wmic.exe
Token: SeUndockPrivilege	2832	wmic.exe
Token: SeManageVolumePrivilege	2832	wmic.exe
Token: 33	2832	wmic.exe
Token: 34	2832	wmic.exe
Token: 35	2832	wmic.exe
Token: SeDebugPrivilege	2580	powershell.exe
Token: SeDebugPrivilege	2980	powershell.exe
Token: SeDebugPrivilege	1144	powershell.exe
Token: SeDebugPrivilege	2896	powershell.exe
Token: SeIncreaseQuotaPrivilege	1452	wmic.exe
Token: SeSecurityPrivilege	1452	wmic.exe
Token: SeTakeOwnershipPrivilege	1452	wmic.exe
Token: SeLoadDriverPrivilege	1452	wmic.exe
Token: SeSystemProfilePrivilege	1452	wmic.exe
Token: SeSystemtimePrivilege	1452	wmic.exe
Token: SeProfSingleProcessPrivilege	1452	wmic.exe
Token: SeIncBasePriorityPrivilege	1452	wmic.exe
Token: SeCreatePagefilePrivilege	1452	wmic.exe
Token: SeBackupPrivilege	1452	wmic.exe
Token: SeRestorePrivilege	1452	wmic.exe
Token: SeShutdownPrivilege	1452	wmic.exe
Token: SeDebugPrivilege	1452	wmic.exe
Token: SeSystemEnvironmentPrivilege	1452	wmic.exe
Token: SeRemoteShutdownPrivilege	1452	wmic.exe
Token: SeUndockPrivilege	1452	wmic.exe
Token: SeManageVolumePrivilege	1452	wmic.exe
Token: 33	1452	wmic.exe
Token: 34	1452	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 2832	2848	Umbral.exe	30
PID 2848 wrote to memory of 2832	2848	Umbral.exe	30
PID 2848 wrote to memory of 2832	2848	Umbral.exe	30
PID 2848 wrote to memory of 2588	2848	Umbral.exe	33
PID 2848 wrote to memory of 2588	2848	Umbral.exe	33
PID 2848 wrote to memory of 2588	2848	Umbral.exe	33
PID 2848 wrote to memory of 2580	2848	Umbral.exe	35
PID 2848 wrote to memory of 2580	2848	Umbral.exe	35
PID 2848 wrote to memory of 2580	2848	Umbral.exe	35
PID 2848 wrote to memory of 2980	2848	Umbral.exe	37
PID 2848 wrote to memory of 2980	2848	Umbral.exe	37
PID 2848 wrote to memory of 2980	2848	Umbral.exe	37
PID 2848 wrote to memory of 1144	2848	Umbral.exe	39
PID 2848 wrote to memory of 1144	2848	Umbral.exe	39
PID 2848 wrote to memory of 1144	2848	Umbral.exe	39
PID 2848 wrote to memory of 2896	2848	Umbral.exe	41
PID 2848 wrote to memory of 2896	2848	Umbral.exe	41
PID 2848 wrote to memory of 2896	2848	Umbral.exe	41
PID 2848 wrote to memory of 1452	2848	Umbral.exe	43
PID 2848 wrote to memory of 1452	2848	Umbral.exe	43
PID 2848 wrote to memory of 1452	2848	Umbral.exe	43
PID 2848 wrote to memory of 1808	2848	Umbral.exe	45
PID 2848 wrote to memory of 1808	2848	Umbral.exe	45
PID 2848 wrote to memory of 1808	2848	Umbral.exe	45
PID 2848 wrote to memory of 1604	2848	Umbral.exe	47
PID 2848 wrote to memory of 1604	2848	Umbral.exe	47
PID 2848 wrote to memory of 1604	2848	Umbral.exe	47
PID 2848 wrote to memory of 2168	2848	Umbral.exe	49
PID 2848 wrote to memory of 2168	2848	Umbral.exe	49
PID 2848 wrote to memory of 2168	2848	Umbral.exe	49
PID 2848 wrote to memory of 1768	2848	Umbral.exe	51
PID 2848 wrote to memory of 1768	2848	Umbral.exe	51
PID 2848 wrote to memory of 1768	2848	Umbral.exe	51
PID 2848 wrote to memory of 1308	2848	Umbral.exe	53
PID 2848 wrote to memory of 1308	2848	Umbral.exe	53
PID 2848 wrote to memory of 1308	2848	Umbral.exe	53
PID 1308 wrote to memory of 2920	1308	cmd.exe	55
PID 1308 wrote to memory of 2920	1308	cmd.exe	55
PID 1308 wrote to memory of 2920	1308	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2588	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:2848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2832
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2588
- 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:2580
- 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:2980
- 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:1144
- 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:2896
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1452
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1808
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1604
- 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:2168
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1768
- 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:1308
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2920

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
f12599bafc881eb379824564b2ded2d7

SHA1
31e40309150db568ebdcf435764e97dab7a073bf

SHA256
97b8990a6f25d580489a406d5e04c64e0e0b5974320915cd89daccdfbb3bb155

SHA512
a76bee9de6b066476671d7ba9d7dfc6924e2f6be28127ebc364403d22c6d96fe37bfef0bbd5578421ed20ceeb7c7fa104440910ef128c48c4298a1ff844607e5

Download Submit
memory/2168-40-0x0000000002900000-0x0000000002908000-memory.dmp

Filesize
32KB

Download
memory/2580-8-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2580-7-0x000000001B500000-0x000000001B7E2000-memory.dmp

Filesize
2.9MB

Download
memory/2848-2-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2848-1-0x0000000000160000-0x00000000001A0000-memory.dmp

Filesize
256KB

Download
memory/2848-0-0x000007FEF5AB3000-0x000007FEF5AB4000-memory.dmp

Filesize
4KB

Download
memory/2848-44-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2980-15-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download
memory/2980-14-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download