umbral | 3fc208899b7c2f6208b31ead1b538808dac5fbcc79de62ca867ee0f27064e6ac

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
18-07-2024 21:11

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General

Target

Umbral.exe
Size

229KB
MD5

47a00d21a6b9b87b9ff9d9190d820531
SHA1

f70756addfdffe4333ea2811233c15c3923a3a2f
SHA256

3fc208899b7c2f6208b31ead1b538808dac5fbcc79de62ca867ee0f27064e6ac
SHA512

b9cbcf10cd9024449524a3554f37cf73bbdf9c983a7c2cfe605eb581902eb9c7e450277e9d627607c2ad369fd415ec141109559a3371198d5ee0a37d2d21a2cc
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4lAMc1aYe5xyRXKYZd8l0b8e1maqvRei:noZ0L+EP8WMc1aYe5xyRXKYZd8WJqvRT

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2680-1-0x0000000000E80000-0x0000000000EC0000-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
2272	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
2656	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2680	Umbral.exe
2272	powershell.exe
2748	powershell.exe
2596	powershell.exe
664	powershell.exe
1740	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2680	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2536	wmic.exe
Token: SeSecurityPrivilege	2536	wmic.exe
Token: SeTakeOwnershipPrivilege	2536	wmic.exe
Token: SeLoadDriverPrivilege	2536	wmic.exe
Token: SeSystemProfilePrivilege	2536	wmic.exe
Token: SeSystemtimePrivilege	2536	wmic.exe
Token: SeProfSingleProcessPrivilege	2536	wmic.exe
Token: SeIncBasePriorityPrivilege	2536	wmic.exe
Token: SeCreatePagefilePrivilege	2536	wmic.exe
Token: SeBackupPrivilege	2536	wmic.exe
Token: SeRestorePrivilege	2536	wmic.exe
Token: SeShutdownPrivilege	2536	wmic.exe
Token: SeDebugPrivilege	2536	wmic.exe
Token: SeSystemEnvironmentPrivilege	2536	wmic.exe
Token: SeRemoteShutdownPrivilege	2536	wmic.exe
Token: SeUndockPrivilege	2536	wmic.exe
Token: SeManageVolumePrivilege	2536	wmic.exe
Token: 33	2536	wmic.exe
Token: 34	2536	wmic.exe
Token: 35	2536	wmic.exe
Token: SeIncreaseQuotaPrivilege	2536	wmic.exe
Token: SeSecurityPrivilege	2536	wmic.exe
Token: SeTakeOwnershipPrivilege	2536	wmic.exe
Token: SeLoadDriverPrivilege	2536	wmic.exe
Token: SeSystemProfilePrivilege	2536	wmic.exe
Token: SeSystemtimePrivilege	2536	wmic.exe
Token: SeProfSingleProcessPrivilege	2536	wmic.exe
Token: SeIncBasePriorityPrivilege	2536	wmic.exe
Token: SeCreatePagefilePrivilege	2536	wmic.exe
Token: SeBackupPrivilege	2536	wmic.exe
Token: SeRestorePrivilege	2536	wmic.exe
Token: SeShutdownPrivilege	2536	wmic.exe
Token: SeDebugPrivilege	2536	wmic.exe
Token: SeSystemEnvironmentPrivilege	2536	wmic.exe
Token: SeRemoteShutdownPrivilege	2536	wmic.exe
Token: SeUndockPrivilege	2536	wmic.exe
Token: SeManageVolumePrivilege	2536	wmic.exe
Token: 33	2536	wmic.exe
Token: 34	2536	wmic.exe
Token: 35	2536	wmic.exe
Token: SeDebugPrivilege	2272	powershell.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	2596	powershell.exe
Token: SeDebugPrivilege	664	powershell.exe
Token: SeIncreaseQuotaPrivilege	2044	wmic.exe
Token: SeSecurityPrivilege	2044	wmic.exe
Token: SeTakeOwnershipPrivilege	2044	wmic.exe
Token: SeLoadDriverPrivilege	2044	wmic.exe
Token: SeSystemProfilePrivilege	2044	wmic.exe
Token: SeSystemtimePrivilege	2044	wmic.exe
Token: SeProfSingleProcessPrivilege	2044	wmic.exe
Token: SeIncBasePriorityPrivilege	2044	wmic.exe
Token: SeCreatePagefilePrivilege	2044	wmic.exe
Token: SeBackupPrivilege	2044	wmic.exe
Token: SeRestorePrivilege	2044	wmic.exe
Token: SeShutdownPrivilege	2044	wmic.exe
Token: SeDebugPrivilege	2044	wmic.exe
Token: SeSystemEnvironmentPrivilege	2044	wmic.exe
Token: SeRemoteShutdownPrivilege	2044	wmic.exe
Token: SeUndockPrivilege	2044	wmic.exe
Token: SeManageVolumePrivilege	2044	wmic.exe
Token: 33	2044	wmic.exe
Token: 34	2044	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2536	2680	Umbral.exe	30
PID 2680 wrote to memory of 2536	2680	Umbral.exe	30
PID 2680 wrote to memory of 2536	2680	Umbral.exe	30
PID 2680 wrote to memory of 2272	2680	Umbral.exe	33
PID 2680 wrote to memory of 2272	2680	Umbral.exe	33
PID 2680 wrote to memory of 2272	2680	Umbral.exe	33
PID 2680 wrote to memory of 2748	2680	Umbral.exe	35
PID 2680 wrote to memory of 2748	2680	Umbral.exe	35
PID 2680 wrote to memory of 2748	2680	Umbral.exe	35
PID 2680 wrote to memory of 2596	2680	Umbral.exe	38
PID 2680 wrote to memory of 2596	2680	Umbral.exe	38
PID 2680 wrote to memory of 2596	2680	Umbral.exe	38
PID 2680 wrote to memory of 664	2680	Umbral.exe	40
PID 2680 wrote to memory of 664	2680	Umbral.exe	40
PID 2680 wrote to memory of 664	2680	Umbral.exe	40
PID 2680 wrote to memory of 2044	2680	Umbral.exe	42
PID 2680 wrote to memory of 2044	2680	Umbral.exe	42
PID 2680 wrote to memory of 2044	2680	Umbral.exe	42
PID 2680 wrote to memory of 1940	2680	Umbral.exe	44
PID 2680 wrote to memory of 1940	2680	Umbral.exe	44
PID 2680 wrote to memory of 1940	2680	Umbral.exe	44
PID 2680 wrote to memory of 1712	2680	Umbral.exe	46
PID 2680 wrote to memory of 1712	2680	Umbral.exe	46
PID 2680 wrote to memory of 1712	2680	Umbral.exe	46
PID 2680 wrote to memory of 1740	2680	Umbral.exe	48
PID 2680 wrote to memory of 1740	2680	Umbral.exe	48
PID 2680 wrote to memory of 1740	2680	Umbral.exe	48
PID 2680 wrote to memory of 2656	2680	Umbral.exe	50
PID 2680 wrote to memory of 2656	2680	Umbral.exe	50
PID 2680 wrote to memory of 2656	2680	Umbral.exe	50

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:2680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2536
- 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:2272
- 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:2748
- 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:2596
- 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:664
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1712
- 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:1740
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2656

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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\2AB4IVVHFVOOMQ2XAM4R.temp

Filesize
7KB

MD5
34dc1120c200a1970b9c51949003a1e9

SHA1
fc627b45551d177930a3bfdee5c782cf5543e55b

SHA256
d6ff8e96928a280c45f3f7c397628e82d053b30687201ec94016b260a4bc11a5

SHA512
22964f9c132972d02b5ee5bcc7a03275e432451d3fb49c990112dc5c5c9dae3b8118766e89d0051dd5bac57a62cdd9c0f51a198f87be0b93d06f160dc6227f34

Download Submit
memory/1740-44-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/1740-45-0x00000000029F0000-0x00000000029F8000-memory.dmp

Filesize
32KB

Download
memory/2272-7-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2272-8-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2680-0-0x000007FEF5943000-0x000007FEF5944000-memory.dmp

Filesize
4KB

Download
memory/2680-1-0x0000000000E80000-0x0000000000EC0000-memory.dmp

Filesize
256KB

Download
memory/2680-2-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

Filesize
9.9MB

Download
memory/2680-49-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-14-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2748-15-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download