umbral | 0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
03-08-2024 17:48

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General

Target

Umbral1.exe
Size

227KB
MD5

f6aeb1204375bc9a4ea0cfa7a1a76ba5
SHA1

e659b3e54d32f44bf915d64c51bb512e58a7eeea
SHA256

0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96
SHA512

75ffba3ec1f5e05684ab0b99af42a518735324355745f0f9e3ba057627b746a948b86331e281db1bc2064f504af334118cb29807cb97b6579723e144d7acbd41
SSDEEP

6144:+loZMLrIkd8g+EtXHkv/iD44VShOsTPkZFQu//OzCb8e1mJdi:ooZ0L+EP84VShOsTPkZFQu//O6B

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2732-1-0x0000000000A30000-0x0000000000A70000-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
2584	powershell.exe
2548	powershell.exe
1132	powershell.exe
480	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral1.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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1616	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2732	Umbral1.exe
2584	powershell.exe
2548	powershell.exe
1132	powershell.exe
2060	powershell.exe
480	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2732	Umbral1.exe
Token: SeIncreaseQuotaPrivilege	2800	wmic.exe
Token: SeSecurityPrivilege	2800	wmic.exe
Token: SeTakeOwnershipPrivilege	2800	wmic.exe
Token: SeLoadDriverPrivilege	2800	wmic.exe
Token: SeSystemProfilePrivilege	2800	wmic.exe
Token: SeSystemtimePrivilege	2800	wmic.exe
Token: SeProfSingleProcessPrivilege	2800	wmic.exe
Token: SeIncBasePriorityPrivilege	2800	wmic.exe
Token: SeCreatePagefilePrivilege	2800	wmic.exe
Token: SeBackupPrivilege	2800	wmic.exe
Token: SeRestorePrivilege	2800	wmic.exe
Token: SeShutdownPrivilege	2800	wmic.exe
Token: SeDebugPrivilege	2800	wmic.exe
Token: SeSystemEnvironmentPrivilege	2800	wmic.exe
Token: SeRemoteShutdownPrivilege	2800	wmic.exe
Token: SeUndockPrivilege	2800	wmic.exe
Token: SeManageVolumePrivilege	2800	wmic.exe
Token: 33	2800	wmic.exe
Token: 34	2800	wmic.exe
Token: 35	2800	wmic.exe
Token: SeIncreaseQuotaPrivilege	2800	wmic.exe
Token: SeSecurityPrivilege	2800	wmic.exe
Token: SeTakeOwnershipPrivilege	2800	wmic.exe
Token: SeLoadDriverPrivilege	2800	wmic.exe
Token: SeSystemProfilePrivilege	2800	wmic.exe
Token: SeSystemtimePrivilege	2800	wmic.exe
Token: SeProfSingleProcessPrivilege	2800	wmic.exe
Token: SeIncBasePriorityPrivilege	2800	wmic.exe
Token: SeCreatePagefilePrivilege	2800	wmic.exe
Token: SeBackupPrivilege	2800	wmic.exe
Token: SeRestorePrivilege	2800	wmic.exe
Token: SeShutdownPrivilege	2800	wmic.exe
Token: SeDebugPrivilege	2800	wmic.exe
Token: SeSystemEnvironmentPrivilege	2800	wmic.exe
Token: SeRemoteShutdownPrivilege	2800	wmic.exe
Token: SeUndockPrivilege	2800	wmic.exe
Token: SeManageVolumePrivilege	2800	wmic.exe
Token: 33	2800	wmic.exe
Token: 34	2800	wmic.exe
Token: 35	2800	wmic.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	2548	powershell.exe
Token: SeDebugPrivilege	1132	powershell.exe
Token: SeDebugPrivilege	2060	powershell.exe
Token: SeIncreaseQuotaPrivilege	1744	wmic.exe
Token: SeSecurityPrivilege	1744	wmic.exe
Token: SeTakeOwnershipPrivilege	1744	wmic.exe
Token: SeLoadDriverPrivilege	1744	wmic.exe
Token: SeSystemProfilePrivilege	1744	wmic.exe
Token: SeSystemtimePrivilege	1744	wmic.exe
Token: SeProfSingleProcessPrivilege	1744	wmic.exe
Token: SeIncBasePriorityPrivilege	1744	wmic.exe
Token: SeCreatePagefilePrivilege	1744	wmic.exe
Token: SeBackupPrivilege	1744	wmic.exe
Token: SeRestorePrivilege	1744	wmic.exe
Token: SeShutdownPrivilege	1744	wmic.exe
Token: SeDebugPrivilege	1744	wmic.exe
Token: SeSystemEnvironmentPrivilege	1744	wmic.exe
Token: SeRemoteShutdownPrivilege	1744	wmic.exe
Token: SeUndockPrivilege	1744	wmic.exe
Token: SeManageVolumePrivilege	1744	wmic.exe
Token: 33	1744	wmic.exe
Token: 34	1744	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 2800	2732	Umbral1.exe	31
PID 2732 wrote to memory of 2800	2732	Umbral1.exe	31
PID 2732 wrote to memory of 2800	2732	Umbral1.exe	31
PID 2732 wrote to memory of 2584	2732	Umbral1.exe	34
PID 2732 wrote to memory of 2584	2732	Umbral1.exe	34
PID 2732 wrote to memory of 2584	2732	Umbral1.exe	34
PID 2732 wrote to memory of 2548	2732	Umbral1.exe	36
PID 2732 wrote to memory of 2548	2732	Umbral1.exe	36
PID 2732 wrote to memory of 2548	2732	Umbral1.exe	36
PID 2732 wrote to memory of 1132	2732	Umbral1.exe	38
PID 2732 wrote to memory of 1132	2732	Umbral1.exe	38
PID 2732 wrote to memory of 1132	2732	Umbral1.exe	38
PID 2732 wrote to memory of 2060	2732	Umbral1.exe	40
PID 2732 wrote to memory of 2060	2732	Umbral1.exe	40
PID 2732 wrote to memory of 2060	2732	Umbral1.exe	40
PID 2732 wrote to memory of 1744	2732	Umbral1.exe	42
PID 2732 wrote to memory of 1744	2732	Umbral1.exe	42
PID 2732 wrote to memory of 1744	2732	Umbral1.exe	42
PID 2732 wrote to memory of 2852	2732	Umbral1.exe	44
PID 2732 wrote to memory of 2852	2732	Umbral1.exe	44
PID 2732 wrote to memory of 2852	2732	Umbral1.exe	44
PID 2732 wrote to memory of 1468	2732	Umbral1.exe	46
PID 2732 wrote to memory of 1468	2732	Umbral1.exe	46
PID 2732 wrote to memory of 1468	2732	Umbral1.exe	46
PID 2732 wrote to memory of 480	2732	Umbral1.exe	48
PID 2732 wrote to memory of 480	2732	Umbral1.exe	48
PID 2732 wrote to memory of 480	2732	Umbral1.exe	48
PID 2732 wrote to memory of 1616	2732	Umbral1.exe	50
PID 2732 wrote to memory of 1616	2732	Umbral1.exe	50
PID 2732 wrote to memory of 1616	2732	Umbral1.exe	50

C:\Users\Admin\AppData\Local\Temp\Umbral1.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2800
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- 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:2548
- 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:1132
- 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:2060
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2852
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1468
- 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:480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1616

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
0c64dda41ab01aa46cdb2bac90a56fde

SHA1
4583a6499c0436f45dfaadbf3feff9533e00142f

SHA256
f55a859eb60a583344be3982035bacfd01dd3832c951ae546c9acfc921c759bc

SHA512
b12e01ff675936cac39dbcac4233ddd136ce1dbe3105dbe5a04052cc7a9160a3b6824eebf158fed6c0cdc2e3475a4ab6bbb5058f553b38e614ad75b41d27ce3d

Download Submit
memory/480-44-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2548-14-0x000000001B720000-0x000000001BA02000-memory.dmp

Filesize
2.9MB

Download
memory/2548-15-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2584-7-0x000000001B850000-0x000000001BB32000-memory.dmp

Filesize
2.9MB

Download
memory/2584-8-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/2732-0-0x000007FEF5D23000-0x000007FEF5D24000-memory.dmp

Filesize
4KB

Download
memory/2732-1-0x0000000000A30000-0x0000000000A70000-memory.dmp

Filesize
256KB

Download
memory/2732-2-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2732-48-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download