umbral | 31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27-06-2024 20:16

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General

Target

31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe
Size

455KB
MD5

2ef41c1b58df5c7204770c5b599f361a
SHA1

6cb5318175b19409a511a28f8f79aba50d7bc8cc
SHA256

31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb
SHA512

6367d7aae6431976e70e01faa41b730a20e99336780b1a368797765e73557224f12e11c417f3fde89ceddf0afcdd05a2790ac77a6bbb406097fb069d8e084abb
SSDEEP

6144:DFob20/TesMPbgBfVlWbKABdpFViyIoP/E0oys2oL62mGCsWRBmkfReNxa/YyCRZ:EqP0JVlWK4So5s2JvJD7fRb/9CRAV

Score

10^/10

umbral execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1252175796043513908/aC5-XwIWIrkxvztpoeIjyB7EG1IDIe4Uz4bAMFAjl2H6KtYUCPqqQkESuXBHBE5JW2uX

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/memory/4004-26-0x00000285474E0000-0x0000028547520000-memory.dmp	family_umbral
behavioral2/files/0x00070000000233fb-24.dat	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
3656	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe

Executes dropped EXE 2 IoCs

pid	Process
2116	Client.exe
4004	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
20	discord.com
21	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
16	ip-api.com

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

System Information Discovery
T1082

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3704	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4796	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4004	Umbral.exe
3656	powershell.exe
3656	powershell.exe
4472	powershell.exe
4472	powershell.exe
1456	powershell.exe
1456	powershell.exe
3808	powershell.exe
3808	powershell.exe
1404	powershell.exe
1404	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4004	Umbral.exe
Token: SeIncreaseQuotaPrivilege	916	wmic.exe
Token: SeSecurityPrivilege	916	wmic.exe
Token: SeTakeOwnershipPrivilege	916	wmic.exe
Token: SeLoadDriverPrivilege	916	wmic.exe
Token: SeSystemProfilePrivilege	916	wmic.exe
Token: SeSystemtimePrivilege	916	wmic.exe
Token: SeProfSingleProcessPrivilege	916	wmic.exe
Token: SeIncBasePriorityPrivilege	916	wmic.exe
Token: SeCreatePagefilePrivilege	916	wmic.exe
Token: SeBackupPrivilege	916	wmic.exe
Token: SeRestorePrivilege	916	wmic.exe
Token: SeShutdownPrivilege	916	wmic.exe
Token: SeDebugPrivilege	916	wmic.exe
Token: SeSystemEnvironmentPrivilege	916	wmic.exe
Token: SeRemoteShutdownPrivilege	916	wmic.exe
Token: SeUndockPrivilege	916	wmic.exe
Token: SeManageVolumePrivilege	916	wmic.exe
Token: 33	916	wmic.exe
Token: 34	916	wmic.exe
Token: 35	916	wmic.exe
Token: 36	916	wmic.exe
Token: SeIncreaseQuotaPrivilege	916	wmic.exe
Token: SeSecurityPrivilege	916	wmic.exe
Token: SeTakeOwnershipPrivilege	916	wmic.exe
Token: SeLoadDriverPrivilege	916	wmic.exe
Token: SeSystemProfilePrivilege	916	wmic.exe
Token: SeSystemtimePrivilege	916	wmic.exe
Token: SeProfSingleProcessPrivilege	916	wmic.exe
Token: SeIncBasePriorityPrivilege	916	wmic.exe
Token: SeCreatePagefilePrivilege	916	wmic.exe
Token: SeBackupPrivilege	916	wmic.exe
Token: SeRestorePrivilege	916	wmic.exe
Token: SeShutdownPrivilege	916	wmic.exe
Token: SeDebugPrivilege	916	wmic.exe
Token: SeSystemEnvironmentPrivilege	916	wmic.exe
Token: SeRemoteShutdownPrivilege	916	wmic.exe
Token: SeUndockPrivilege	916	wmic.exe
Token: SeManageVolumePrivilege	916	wmic.exe
Token: 33	916	wmic.exe
Token: 34	916	wmic.exe
Token: 35	916	wmic.exe
Token: 36	916	wmic.exe
Token: SeDebugPrivilege	3656	powershell.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeDebugPrivilege	1456	powershell.exe
Token: SeDebugPrivilege	3808	powershell.exe
Token: SeIncreaseQuotaPrivilege	2568	wmic.exe
Token: SeSecurityPrivilege	2568	wmic.exe
Token: SeTakeOwnershipPrivilege	2568	wmic.exe
Token: SeLoadDriverPrivilege	2568	wmic.exe
Token: SeSystemProfilePrivilege	2568	wmic.exe
Token: SeSystemtimePrivilege	2568	wmic.exe
Token: SeProfSingleProcessPrivilege	2568	wmic.exe
Token: SeIncBasePriorityPrivilege	2568	wmic.exe
Token: SeCreatePagefilePrivilege	2568	wmic.exe
Token: SeBackupPrivilege	2568	wmic.exe
Token: SeRestorePrivilege	2568	wmic.exe
Token: SeShutdownPrivilege	2568	wmic.exe
Token: SeDebugPrivilege	2568	wmic.exe
Token: SeSystemEnvironmentPrivilege	2568	wmic.exe
Token: SeRemoteShutdownPrivilege	2568	wmic.exe
Token: SeUndockPrivilege	2568	wmic.exe
Token: SeManageVolumePrivilege	2568	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 2116	3456	31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe	81
PID 3456 wrote to memory of 2116	3456	31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe	81
PID 3456 wrote to memory of 4004	3456	31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe	82
PID 3456 wrote to memory of 4004	3456	31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe	82
PID 4004 wrote to memory of 916	4004	Umbral.exe	84
PID 4004 wrote to memory of 916	4004	Umbral.exe	84
PID 4004 wrote to memory of 2240	4004	Umbral.exe	86
PID 4004 wrote to memory of 2240	4004	Umbral.exe	86
PID 4004 wrote to memory of 3656	4004	Umbral.exe	90
PID 4004 wrote to memory of 3656	4004	Umbral.exe	90
PID 4004 wrote to memory of 4472	4004	Umbral.exe	92
PID 4004 wrote to memory of 4472	4004	Umbral.exe	92
PID 4004 wrote to memory of 1456	4004	Umbral.exe	95
PID 4004 wrote to memory of 1456	4004	Umbral.exe	95
PID 4004 wrote to memory of 3808	4004	Umbral.exe	97
PID 4004 wrote to memory of 3808	4004	Umbral.exe	97
PID 4004 wrote to memory of 2568	4004	Umbral.exe	99
PID 4004 wrote to memory of 2568	4004	Umbral.exe	99
PID 4004 wrote to memory of 2184	4004	Umbral.exe	101
PID 4004 wrote to memory of 2184	4004	Umbral.exe	101
PID 4004 wrote to memory of 4684	4004	Umbral.exe	103
PID 4004 wrote to memory of 4684	4004	Umbral.exe	103
PID 4004 wrote to memory of 1404	4004	Umbral.exe	105
PID 4004 wrote to memory of 1404	4004	Umbral.exe	105
PID 4004 wrote to memory of 3704	4004	Umbral.exe	107
PID 4004 wrote to memory of 3704	4004	Umbral.exe	107
PID 4004 wrote to memory of 224	4004	Umbral.exe	110
PID 4004 wrote to memory of 224	4004	Umbral.exe	110
PID 224 wrote to memory of 4796	224	cmd.exe	112
PID 224 wrote to memory of 4796	224	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2240	attrib.exe

C:\Users\Admin\AppData\Local\Temp\31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe
"C:\Users\Admin\AppData\Local\Temp\31e4b84acc0e087764e3608e94949c75fa86c665af401b4f3248a5a03ee92bcb.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Users\Admin\AppData\Local\Temp\Client.exe
  "C:\Users\Admin\AppData\Local\Temp\Client.exe"
  2⤵
  - Executes dropped EXE
  PID:2116
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4004
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:916
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    3⤵
    - Views/modifies file attributes
    PID:2240
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3656
- - 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⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4472
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1456
- - 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:3808
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2568
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2184
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:4684
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1404
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:3704
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:224
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:4796

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
17d8127be94d3c1b6fcc9a4ed585003e

SHA1
789874fcc7c778c723f3e89822d8cc8750c6c4c8

SHA256
ea357ad1f95863b3618d31e5b0f90495331f64de2b784d9e185b48668c937a7b

SHA512
bb18b6d07d82227f5cfbe3eb460df79ec892c560ad2964dcd4782aa26336ae15059843bf46a739bdd4a4daa58057f99102531a756a1cf434ce6449b3cd35a98e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Client.exe

Filesize
569KB

MD5
62c311d8e63f11d2d0a2035fc249e1cb

SHA1
2dbf4cd76faf5201898f5721f095c7de01a6fe4b

SHA256
5ccceef40894f9720673067bca19c478464a49d37debd328f073fad3657c2084

SHA512
8cd92f69c945231ce3569f0e0cd826273ecf8e5d345677e147bd1f3033b607ff9e535c9e5fbcc84500ccc92def86fa6c79595716d11fde2795029bd0d8b0d824

Download Submit
C:\Users\Admin\AppData\Local\Temp\Umbral.exe

Filesize
229KB

MD5
80b73234d85822b232343c03e21b73f8

SHA1
18a5f4a710726c287c7915a3bdfe9f701b42f959

SHA256
0de2a1ea807817d1bada4b20a0a6964930e03abea4f0073cae7c837d54e1b46f

SHA512
9847bf319dc82c0ee3fac9171f0546381b57e03796c5e0407b11c3bae2759e2af5eb024c102e35d5d37ab890e872bea7af66c55cec0b0e1955e517e769f167e0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_h2wpbw23.rbx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2116-30-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2116-27-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2116-25-0x0000000000C30000-0x0000000000CC4000-memory.dmp

Filesize
592KB

Download
memory/3456-1-0x0000000000880000-0x00000000008F8000-memory.dmp

Filesize
480KB

Download
memory/3456-10-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/3456-100-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/3456-0-0x00007FFEC4133000-0x00007FFEC4135000-memory.dmp

Filesize
8KB

Download
memory/3656-31-0x000001AC577F0000-0x000001AC57812000-memory.dmp

Filesize
136KB

Download
memory/4004-26-0x00000285474E0000-0x0000028547520000-memory.dmp

Filesize
256KB

Download
memory/4004-59-0x0000028549280000-0x000002854929E000-memory.dmp

Filesize
120KB

Download
memory/4004-58-0x0000028561CB0000-0x0000028561D00000-memory.dmp

Filesize
320KB

Download
memory/4004-95-0x00000285492B0000-0x00000285492BA000-memory.dmp

Filesize
40KB

Download
memory/4004-96-0x00000285492E0000-0x00000285492F2000-memory.dmp

Filesize
72KB

Download
memory/4004-57-0x0000028561B10000-0x0000028561B86000-memory.dmp

Filesize
472KB

Download
memory/4004-29-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4004-116-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

Filesize
10.8MB

Download