umbral | e8051ca4e2624241ecf48c61e9bfd61e9d1f6cf6fb4cda85eba361edf853b289

Analysis

max time kernel
33s
max time network
15s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
24-10-2023 18:50

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General

Target

Umbral.exe
Size

229KB
MD5

a1d134ca35650fc8eb5029168dc77cf2
SHA1

2d7d11e799d0fd81c6809e214fc0319fe0a3ae1b
SHA256

e8051ca4e2624241ecf48c61e9bfd61e9d1f6cf6fb4cda85eba361edf853b289
SHA512

b4a027c3d286cab99b588fafb82f372ff9e244b657e8909e6454cb23d690ceef8cbb687174fa9877f1cff0f2543cf680ebf175670eb653845749671905f01c4c
SSDEEP

6144:lloZMArIkd8g+EtXHkv/iD4leoRDJ6idZIJbGmTDPb8e1mVi:noZHL+EP8leoRDJ6idZIJbGmTv/

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2664-0-0x0000000000290000-0x00000000002D0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

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

Web Service
T1102

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
2256	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2400	powershell.exe
2692	powershell.exe
2812	powershell.exe
372	powershell.exe
1924	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2664	Umbral.exe
Token: SeDebugPrivilege	2400	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2812	powershell.exe
Token: SeDebugPrivilege	372	powershell.exe
Token: SeIncreaseQuotaPrivilege	2248	wmic.exe
Token: SeSecurityPrivilege	2248	wmic.exe
Token: SeTakeOwnershipPrivilege	2248	wmic.exe
Token: SeLoadDriverPrivilege	2248	wmic.exe
Token: SeSystemProfilePrivilege	2248	wmic.exe
Token: SeSystemtimePrivilege	2248	wmic.exe
Token: SeProfSingleProcessPrivilege	2248	wmic.exe
Token: SeIncBasePriorityPrivilege	2248	wmic.exe
Token: SeCreatePagefilePrivilege	2248	wmic.exe
Token: SeBackupPrivilege	2248	wmic.exe
Token: SeRestorePrivilege	2248	wmic.exe
Token: SeShutdownPrivilege	2248	wmic.exe
Token: SeDebugPrivilege	2248	wmic.exe
Token: SeSystemEnvironmentPrivilege	2248	wmic.exe
Token: SeRemoteShutdownPrivilege	2248	wmic.exe
Token: SeUndockPrivilege	2248	wmic.exe
Token: SeManageVolumePrivilege	2248	wmic.exe
Token: 33	2248	wmic.exe
Token: 34	2248	wmic.exe
Token: 35	2248	wmic.exe
Token: SeIncreaseQuotaPrivilege	2248	wmic.exe
Token: SeSecurityPrivilege	2248	wmic.exe
Token: SeTakeOwnershipPrivilege	2248	wmic.exe
Token: SeLoadDriverPrivilege	2248	wmic.exe
Token: SeSystemProfilePrivilege	2248	wmic.exe
Token: SeSystemtimePrivilege	2248	wmic.exe
Token: SeProfSingleProcessPrivilege	2248	wmic.exe
Token: SeIncBasePriorityPrivilege	2248	wmic.exe
Token: SeCreatePagefilePrivilege	2248	wmic.exe
Token: SeBackupPrivilege	2248	wmic.exe
Token: SeRestorePrivilege	2248	wmic.exe
Token: SeShutdownPrivilege	2248	wmic.exe
Token: SeDebugPrivilege	2248	wmic.exe
Token: SeSystemEnvironmentPrivilege	2248	wmic.exe
Token: SeRemoteShutdownPrivilege	2248	wmic.exe
Token: SeUndockPrivilege	2248	wmic.exe
Token: SeManageVolumePrivilege	2248	wmic.exe
Token: 33	2248	wmic.exe
Token: 34	2248	wmic.exe
Token: 35	2248	wmic.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 2400	2664	Umbral.exe	28
PID 2664 wrote to memory of 2400	2664	Umbral.exe	28
PID 2664 wrote to memory of 2400	2664	Umbral.exe	28
PID 2664 wrote to memory of 2692	2664	Umbral.exe	30
PID 2664 wrote to memory of 2692	2664	Umbral.exe	30
PID 2664 wrote to memory of 2692	2664	Umbral.exe	30
PID 2664 wrote to memory of 2812	2664	Umbral.exe	32
PID 2664 wrote to memory of 2812	2664	Umbral.exe	32
PID 2664 wrote to memory of 2812	2664	Umbral.exe	32
PID 2664 wrote to memory of 372	2664	Umbral.exe	34
PID 2664 wrote to memory of 372	2664	Umbral.exe	34
PID 2664 wrote to memory of 372	2664	Umbral.exe	34
PID 2664 wrote to memory of 2248	2664	Umbral.exe	37
PID 2664 wrote to memory of 2248	2664	Umbral.exe	37
PID 2664 wrote to memory of 2248	2664	Umbral.exe	37
PID 2664 wrote to memory of 2524	2664	Umbral.exe	39
PID 2664 wrote to memory of 2524	2664	Umbral.exe	39
PID 2664 wrote to memory of 2524	2664	Umbral.exe	39
PID 2664 wrote to memory of 1984	2664	Umbral.exe	42
PID 2664 wrote to memory of 1984	2664	Umbral.exe	42
PID 2664 wrote to memory of 1984	2664	Umbral.exe	42
PID 2664 wrote to memory of 1924	2664	Umbral.exe	44
PID 2664 wrote to memory of 1924	2664	Umbral.exe	44
PID 2664 wrote to memory of 1924	2664	Umbral.exe	44
PID 2664 wrote to memory of 2256	2664	Umbral.exe	46
PID 2664 wrote to memory of 2256	2664	Umbral.exe	46
PID 2664 wrote to memory of 2256	2664	Umbral.exe	46

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2400
- 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:2692
- 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:2812
- 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:372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2248
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1984
- 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:1924
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2256

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
2f79e071457293e5d6d91d9859fe10bc

SHA1
a4cf2396d7a785f6608cfc872e812f1a5f3f5642

SHA256
1c98ad99d3613f50b314a7090be29bfa034512ddf0f1e96e912b2f711116f9e1

SHA512
97855a43918d004b8d8f8fe223e45d712b11885dcdebd5d342c57411f22ad889b94775a2ba6beee805eb245941fa2d439d72937fce39de0180cba94d9dfa27f1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
2f79e071457293e5d6d91d9859fe10bc

SHA1
a4cf2396d7a785f6608cfc872e812f1a5f3f5642

SHA256
1c98ad99d3613f50b314a7090be29bfa034512ddf0f1e96e912b2f711116f9e1

SHA512
97855a43918d004b8d8f8fe223e45d712b11885dcdebd5d342c57411f22ad889b94775a2ba6beee805eb245941fa2d439d72937fce39de0180cba94d9dfa27f1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
2f79e071457293e5d6d91d9859fe10bc

SHA1
a4cf2396d7a785f6608cfc872e812f1a5f3f5642

SHA256
1c98ad99d3613f50b314a7090be29bfa034512ddf0f1e96e912b2f711116f9e1

SHA512
97855a43918d004b8d8f8fe223e45d712b11885dcdebd5d342c57411f22ad889b94775a2ba6beee805eb245941fa2d439d72937fce39de0180cba94d9dfa27f1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
2f79e071457293e5d6d91d9859fe10bc

SHA1
a4cf2396d7a785f6608cfc872e812f1a5f3f5642

SHA256
1c98ad99d3613f50b314a7090be29bfa034512ddf0f1e96e912b2f711116f9e1

SHA512
97855a43918d004b8d8f8fe223e45d712b11885dcdebd5d342c57411f22ad889b94775a2ba6beee805eb245941fa2d439d72937fce39de0180cba94d9dfa27f1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\HBZYSWC4H69UNCP8M8XU.temp

Filesize
7KB

MD5
2f79e071457293e5d6d91d9859fe10bc

SHA1
a4cf2396d7a785f6608cfc872e812f1a5f3f5642

SHA256
1c98ad99d3613f50b314a7090be29bfa034512ddf0f1e96e912b2f711116f9e1

SHA512
97855a43918d004b8d8f8fe223e45d712b11885dcdebd5d342c57411f22ad889b94775a2ba6beee805eb245941fa2d439d72937fce39de0180cba94d9dfa27f1

Download Submit
memory/372-60-0x0000000002830000-0x00000000028B0000-memory.dmp

Filesize
512KB

Download
memory/372-61-0x000007FEED9C0000-0x000007FEEE35D000-memory.dmp

Filesize
9.6MB

Download
memory/372-57-0x0000000002830000-0x00000000028B0000-memory.dmp

Filesize
512KB

Download
memory/372-58-0x0000000002830000-0x00000000028B0000-memory.dmp

Filesize
512KB

Download
memory/372-59-0x0000000002830000-0x00000000028B0000-memory.dmp

Filesize
512KB

Download
memory/372-55-0x000007FEED9C0000-0x000007FEEE35D000-memory.dmp

Filesize
9.6MB

Download
memory/372-56-0x000007FEED9C0000-0x000007FEEE35D000-memory.dmp

Filesize
9.6MB

Download
memory/1924-72-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/1924-71-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/1924-77-0x000000000229B000-0x0000000002302000-memory.dmp

Filesize
412KB

Download
memory/1924-76-0x0000000002294000-0x0000000002297000-memory.dmp

Filesize
12KB

Download
memory/1924-74-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/1924-78-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/1924-73-0x0000000002290000-0x0000000002310000-memory.dmp

Filesize
512KB

Download
memory/1924-75-0x0000000002290000-0x0000000002310000-memory.dmp

Filesize
512KB

Download
memory/2400-10-0x00000000025E0000-0x00000000025E8000-memory.dmp

Filesize
32KB

Download
memory/2400-13-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/2400-12-0x0000000002880000-0x0000000002900000-memory.dmp

Filesize
512KB

Download
memory/2400-11-0x0000000002880000-0x0000000002900000-memory.dmp

Filesize
512KB

Download
memory/2400-9-0x000000001B340000-0x000000001B622000-memory.dmp

Filesize
2.9MB

Download
memory/2400-8-0x0000000002880000-0x0000000002900000-memory.dmp

Filesize
512KB

Download
memory/2400-7-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/2664-0-0x0000000000290000-0x00000000002D0000-memory.dmp

Filesize
256KB

Download
memory/2664-82-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Filesize
9.9MB

Download
memory/2664-30-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Filesize
9.9MB

Download
memory/2664-2-0x000000001B230000-0x000000001B2B0000-memory.dmp

Filesize
512KB

Download
memory/2664-1-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Filesize
9.9MB

Download
memory/2692-19-0x000000001B3B0000-0x000000001B692000-memory.dmp

Filesize
2.9MB

Download
memory/2692-27-0x0000000002A20000-0x0000000002AA0000-memory.dmp

Filesize
512KB

Download
memory/2692-22-0x0000000002A20000-0x0000000002AA0000-memory.dmp

Filesize
512KB

Download
memory/2692-23-0x0000000002A20000-0x0000000002AA0000-memory.dmp

Filesize
512KB

Download
memory/2692-21-0x0000000002360000-0x0000000002368000-memory.dmp

Filesize
32KB

Download
memory/2692-20-0x000007FEED9C0000-0x000007FEEE35D000-memory.dmp

Filesize
9.6MB

Download
memory/2692-24-0x000007FEED9C0000-0x000007FEEE35D000-memory.dmp

Filesize
9.6MB

Download
memory/2692-25-0x0000000002A20000-0x0000000002AA0000-memory.dmp

Filesize
512KB

Download
memory/2692-26-0x000007FEED9C0000-0x000007FEEE35D000-memory.dmp

Filesize
9.6MB

Download
memory/2812-47-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2812-43-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-44-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2812-45-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-49-0x000007FEEE360000-0x000007FEEECFD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-46-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2812-48-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download