umbral | 20c0ffaba031d92ff2346793e00bb14595bc2700ed31566454bf642672f3a0df

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
16-08-2024 17:32

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General

Target

b58eafa327d4fb65a156dd947ef01f40N.exe
Size

231KB
MD5

b58eafa327d4fb65a156dd947ef01f40
SHA1

45140af55394b97cfc2f2d94846a1bcba54a61a5
SHA256

20c0ffaba031d92ff2346793e00bb14595bc2700ed31566454bf642672f3a0df
SHA512

7a764ce2f9bdcda59ca91cd6764c1e80f86434ae6708f54ee33ed4e9519b348d33b3384cb228a29614a3524ce84d231486f2715b6b9eb7655ed9b78e69cf6bbb
SSDEEP

6144:xloZMLrIkd8g+EtXHkv/iD4FGvXKaL7W8e1m06i:DoZ0L+EP8kvjwL/

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/468-1-0x0000000000E30000-0x0000000000E70000-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
2648	powershell.exe
2828	powershell.exe
2796	powershell.exe
1544	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b58eafa327d4fb65a156dd947ef01f40N.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
1684	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
468	b58eafa327d4fb65a156dd947ef01f40N.exe
2648	powershell.exe
2828	powershell.exe
2796	powershell.exe
1196	powershell.exe
1544	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	468	b58eafa327d4fb65a156dd947ef01f40N.exe
Token: SeIncreaseQuotaPrivilege	2156	wmic.exe
Token: SeSecurityPrivilege	2156	wmic.exe
Token: SeTakeOwnershipPrivilege	2156	wmic.exe
Token: SeLoadDriverPrivilege	2156	wmic.exe
Token: SeSystemProfilePrivilege	2156	wmic.exe
Token: SeSystemtimePrivilege	2156	wmic.exe
Token: SeProfSingleProcessPrivilege	2156	wmic.exe
Token: SeIncBasePriorityPrivilege	2156	wmic.exe
Token: SeCreatePagefilePrivilege	2156	wmic.exe
Token: SeBackupPrivilege	2156	wmic.exe
Token: SeRestorePrivilege	2156	wmic.exe
Token: SeShutdownPrivilege	2156	wmic.exe
Token: SeDebugPrivilege	2156	wmic.exe
Token: SeSystemEnvironmentPrivilege	2156	wmic.exe
Token: SeRemoteShutdownPrivilege	2156	wmic.exe
Token: SeUndockPrivilege	2156	wmic.exe
Token: SeManageVolumePrivilege	2156	wmic.exe
Token: 33	2156	wmic.exe
Token: 34	2156	wmic.exe
Token: 35	2156	wmic.exe
Token: SeIncreaseQuotaPrivilege	2156	wmic.exe
Token: SeSecurityPrivilege	2156	wmic.exe
Token: SeTakeOwnershipPrivilege	2156	wmic.exe
Token: SeLoadDriverPrivilege	2156	wmic.exe
Token: SeSystemProfilePrivilege	2156	wmic.exe
Token: SeSystemtimePrivilege	2156	wmic.exe
Token: SeProfSingleProcessPrivilege	2156	wmic.exe
Token: SeIncBasePriorityPrivilege	2156	wmic.exe
Token: SeCreatePagefilePrivilege	2156	wmic.exe
Token: SeBackupPrivilege	2156	wmic.exe
Token: SeRestorePrivilege	2156	wmic.exe
Token: SeShutdownPrivilege	2156	wmic.exe
Token: SeDebugPrivilege	2156	wmic.exe
Token: SeSystemEnvironmentPrivilege	2156	wmic.exe
Token: SeRemoteShutdownPrivilege	2156	wmic.exe
Token: SeUndockPrivilege	2156	wmic.exe
Token: SeManageVolumePrivilege	2156	wmic.exe
Token: 33	2156	wmic.exe
Token: 34	2156	wmic.exe
Token: 35	2156	wmic.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe
Token: SeDebugPrivilege	1196	powershell.exe
Token: SeIncreaseQuotaPrivilege	1652	wmic.exe
Token: SeSecurityPrivilege	1652	wmic.exe
Token: SeTakeOwnershipPrivilege	1652	wmic.exe
Token: SeLoadDriverPrivilege	1652	wmic.exe
Token: SeSystemProfilePrivilege	1652	wmic.exe
Token: SeSystemtimePrivilege	1652	wmic.exe
Token: SeProfSingleProcessPrivilege	1652	wmic.exe
Token: SeIncBasePriorityPrivilege	1652	wmic.exe
Token: SeCreatePagefilePrivilege	1652	wmic.exe
Token: SeBackupPrivilege	1652	wmic.exe
Token: SeRestorePrivilege	1652	wmic.exe
Token: SeShutdownPrivilege	1652	wmic.exe
Token: SeDebugPrivilege	1652	wmic.exe
Token: SeSystemEnvironmentPrivilege	1652	wmic.exe
Token: SeRemoteShutdownPrivilege	1652	wmic.exe
Token: SeUndockPrivilege	1652	wmic.exe
Token: SeManageVolumePrivilege	1652	wmic.exe
Token: 33	1652	wmic.exe
Token: 34	1652	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 2156	468	b58eafa327d4fb65a156dd947ef01f40N.exe	31
PID 468 wrote to memory of 2156	468	b58eafa327d4fb65a156dd947ef01f40N.exe	31
PID 468 wrote to memory of 2156	468	b58eafa327d4fb65a156dd947ef01f40N.exe	31
PID 468 wrote to memory of 2648	468	b58eafa327d4fb65a156dd947ef01f40N.exe	34
PID 468 wrote to memory of 2648	468	b58eafa327d4fb65a156dd947ef01f40N.exe	34
PID 468 wrote to memory of 2648	468	b58eafa327d4fb65a156dd947ef01f40N.exe	34
PID 468 wrote to memory of 2828	468	b58eafa327d4fb65a156dd947ef01f40N.exe	36
PID 468 wrote to memory of 2828	468	b58eafa327d4fb65a156dd947ef01f40N.exe	36
PID 468 wrote to memory of 2828	468	b58eafa327d4fb65a156dd947ef01f40N.exe	36
PID 468 wrote to memory of 2796	468	b58eafa327d4fb65a156dd947ef01f40N.exe	38
PID 468 wrote to memory of 2796	468	b58eafa327d4fb65a156dd947ef01f40N.exe	38
PID 468 wrote to memory of 2796	468	b58eafa327d4fb65a156dd947ef01f40N.exe	38
PID 468 wrote to memory of 1196	468	b58eafa327d4fb65a156dd947ef01f40N.exe	40
PID 468 wrote to memory of 1196	468	b58eafa327d4fb65a156dd947ef01f40N.exe	40
PID 468 wrote to memory of 1196	468	b58eafa327d4fb65a156dd947ef01f40N.exe	40
PID 468 wrote to memory of 1652	468	b58eafa327d4fb65a156dd947ef01f40N.exe	42
PID 468 wrote to memory of 1652	468	b58eafa327d4fb65a156dd947ef01f40N.exe	42
PID 468 wrote to memory of 1652	468	b58eafa327d4fb65a156dd947ef01f40N.exe	42
PID 468 wrote to memory of 1736	468	b58eafa327d4fb65a156dd947ef01f40N.exe	44
PID 468 wrote to memory of 1736	468	b58eafa327d4fb65a156dd947ef01f40N.exe	44
PID 468 wrote to memory of 1736	468	b58eafa327d4fb65a156dd947ef01f40N.exe	44
PID 468 wrote to memory of 1964	468	b58eafa327d4fb65a156dd947ef01f40N.exe	46
PID 468 wrote to memory of 1964	468	b58eafa327d4fb65a156dd947ef01f40N.exe	46
PID 468 wrote to memory of 1964	468	b58eafa327d4fb65a156dd947ef01f40N.exe	46
PID 468 wrote to memory of 1544	468	b58eafa327d4fb65a156dd947ef01f40N.exe	48
PID 468 wrote to memory of 1544	468	b58eafa327d4fb65a156dd947ef01f40N.exe	48
PID 468 wrote to memory of 1544	468	b58eafa327d4fb65a156dd947ef01f40N.exe	48
PID 468 wrote to memory of 1684	468	b58eafa327d4fb65a156dd947ef01f40N.exe	50
PID 468 wrote to memory of 1684	468	b58eafa327d4fb65a156dd947ef01f40N.exe	50
PID 468 wrote to memory of 1684	468	b58eafa327d4fb65a156dd947ef01f40N.exe	50

C:\Users\Admin\AppData\Local\Temp\b58eafa327d4fb65a156dd947ef01f40N.exe
"C:\Users\Admin\AppData\Local\Temp\b58eafa327d4fb65a156dd947ef01f40N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:468
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2156
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b58eafa327d4fb65a156dd947ef01f40N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2648
- 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:2828
- 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:2796
- 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:1196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1736
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1964
- 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:1544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1684

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
591996212eca5c1915ee1a3ac0c8ee14

SHA1
f30ed0d8221d0ef980304e633cf5fd146651b987

SHA256
37bd966d52e7de696e403d5006ff707d082d3cef5bcf54f8c0e0fb0280f2fcbe

SHA512
3cb22da5e9433438b148cbbe9a770c612636dd9e3edfa96af242c4af46c652f1ad7c6d531bafb5b2c3c2895407a41a7117460a167700b27dd42c756228d22afd

Download Submit
memory/468-0-0x000007FEF5973000-0x000007FEF5974000-memory.dmp

Filesize
4KB

Download
memory/468-1-0x0000000000E30000-0x0000000000E70000-memory.dmp

Filesize
256KB

Download
memory/468-2-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

Filesize
9.9MB

Download
memory/468-48-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

Filesize
9.9MB

Download
memory/1544-44-0x00000000022A0000-0x00000000022A8000-memory.dmp

Filesize
32KB

Download
memory/2648-7-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/2648-8-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2828-14-0x000000001B540000-0x000000001B822000-memory.dmp

Filesize
2.9MB

Download
memory/2828-15-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download