umbral | 733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-01-2025 10:52

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General

Target

733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe
Size

231KB
MD5

0adae0c64017d858ba11f98f8276a970
SHA1

4363eac789ffcf9d966981069e2709a249509181
SHA256

733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef
SHA512

e31f1d41ad682b6e566e628ec02fbcc690f79026442e6171f3ae745058d80c72cdc36b6822f84d9c950d8aa24bdc4820257b30a43bb7138888df65bc423cdea8
SSDEEP

6144:xloZMffsXtioRkts/cnnK6cMltMMjw2xpaBPyAxVkElb8e1mhzLHiy:DoZdtlRk83MltMMjw2xpaBPyAxVkAMWy

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4740-1-0x000001434E7E0000-0x000001434E820000-memory.dmp	family_umbral

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

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
4240	powershell.exe
736	powershell.exe
1396	powershell.exe
3996	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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
2512	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe
4240	powershell.exe
4240	powershell.exe
736	powershell.exe
736	powershell.exe
1396	powershell.exe
1396	powershell.exe
2460	powershell.exe
2460	powershell.exe
3996	powershell.exe
3996	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe
Token: SeIncreaseQuotaPrivilege	3796	wmic.exe
Token: SeSecurityPrivilege	3796	wmic.exe
Token: SeTakeOwnershipPrivilege	3796	wmic.exe
Token: SeLoadDriverPrivilege	3796	wmic.exe
Token: SeSystemProfilePrivilege	3796	wmic.exe
Token: SeSystemtimePrivilege	3796	wmic.exe
Token: SeProfSingleProcessPrivilege	3796	wmic.exe
Token: SeIncBasePriorityPrivilege	3796	wmic.exe
Token: SeCreatePagefilePrivilege	3796	wmic.exe
Token: SeBackupPrivilege	3796	wmic.exe
Token: SeRestorePrivilege	3796	wmic.exe
Token: SeShutdownPrivilege	3796	wmic.exe
Token: SeDebugPrivilege	3796	wmic.exe
Token: SeSystemEnvironmentPrivilege	3796	wmic.exe
Token: SeRemoteShutdownPrivilege	3796	wmic.exe
Token: SeUndockPrivilege	3796	wmic.exe
Token: SeManageVolumePrivilege	3796	wmic.exe
Token: 33	3796	wmic.exe
Token: 34	3796	wmic.exe
Token: 35	3796	wmic.exe
Token: 36	3796	wmic.exe
Token: SeIncreaseQuotaPrivilege	3796	wmic.exe
Token: SeSecurityPrivilege	3796	wmic.exe
Token: SeTakeOwnershipPrivilege	3796	wmic.exe
Token: SeLoadDriverPrivilege	3796	wmic.exe
Token: SeSystemProfilePrivilege	3796	wmic.exe
Token: SeSystemtimePrivilege	3796	wmic.exe
Token: SeProfSingleProcessPrivilege	3796	wmic.exe
Token: SeIncBasePriorityPrivilege	3796	wmic.exe
Token: SeCreatePagefilePrivilege	3796	wmic.exe
Token: SeBackupPrivilege	3796	wmic.exe
Token: SeRestorePrivilege	3796	wmic.exe
Token: SeShutdownPrivilege	3796	wmic.exe
Token: SeDebugPrivilege	3796	wmic.exe
Token: SeSystemEnvironmentPrivilege	3796	wmic.exe
Token: SeRemoteShutdownPrivilege	3796	wmic.exe
Token: SeUndockPrivilege	3796	wmic.exe
Token: SeManageVolumePrivilege	3796	wmic.exe
Token: 33	3796	wmic.exe
Token: 34	3796	wmic.exe
Token: 35	3796	wmic.exe
Token: 36	3796	wmic.exe
Token: SeDebugPrivilege	4240	powershell.exe
Token: SeDebugPrivilege	736	powershell.exe
Token: SeDebugPrivilege	1396	powershell.exe
Token: SeDebugPrivilege	2460	powershell.exe
Token: SeIncreaseQuotaPrivilege	2516	wmic.exe
Token: SeSecurityPrivilege	2516	wmic.exe
Token: SeTakeOwnershipPrivilege	2516	wmic.exe
Token: SeLoadDriverPrivilege	2516	wmic.exe
Token: SeSystemProfilePrivilege	2516	wmic.exe
Token: SeSystemtimePrivilege	2516	wmic.exe
Token: SeProfSingleProcessPrivilege	2516	wmic.exe
Token: SeIncBasePriorityPrivilege	2516	wmic.exe
Token: SeCreatePagefilePrivilege	2516	wmic.exe
Token: SeBackupPrivilege	2516	wmic.exe
Token: SeRestorePrivilege	2516	wmic.exe
Token: SeShutdownPrivilege	2516	wmic.exe
Token: SeDebugPrivilege	2516	wmic.exe
Token: SeSystemEnvironmentPrivilege	2516	wmic.exe
Token: SeRemoteShutdownPrivilege	2516	wmic.exe
Token: SeUndockPrivilege	2516	wmic.exe
Token: SeManageVolumePrivilege	2516	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4740 wrote to memory of 3796	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	85
PID 4740 wrote to memory of 3796	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	85
PID 4740 wrote to memory of 4240	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	88
PID 4740 wrote to memory of 4240	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	88
PID 4740 wrote to memory of 736	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	90
PID 4740 wrote to memory of 736	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	90
PID 4740 wrote to memory of 1396	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	92
PID 4740 wrote to memory of 1396	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	92
PID 4740 wrote to memory of 2460	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	94
PID 4740 wrote to memory of 2460	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	94
PID 4740 wrote to memory of 2516	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	97
PID 4740 wrote to memory of 2516	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	97
PID 4740 wrote to memory of 3860	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	99
PID 4740 wrote to memory of 3860	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	99
PID 4740 wrote to memory of 4924	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	101
PID 4740 wrote to memory of 4924	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	101
PID 4740 wrote to memory of 3996	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	103
PID 4740 wrote to memory of 3996	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	103
PID 4740 wrote to memory of 2512	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	105
PID 4740 wrote to memory of 2512	4740	733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe	105

C:\Users\Admin\AppData\Local\Temp\733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe
"C:\Users\Admin\AppData\Local\Temp\733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4740
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\733fbf085c90972383ee6b0f9402910222a8f8b20367fccf4ff9f1a9ea51e7ef.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4240
- 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:736
- 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:1396
- 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:2460
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4924
- 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:3996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2512

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

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
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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

Filesize
1KB

MD5
6f28ee8df4bdf5490a8b5ebe7d6b89cf

SHA1
6fd0961c27a4fe119bfe43e86410917f5dc2e2e9

SHA256
6f64379097ea161522d22814fc0a69c0e337950826377712adceaa67d0baae51

SHA512
416a3977862dade1534e04f2e2e8f8c7bb794c8e2313ff104a53b622b959bd5a28e8c4346bd703f0eb1c40dc4ffc7c7c5d74c5c5d138089c1fdde9dadd5051f7

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

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vexw1e24.ads.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4240-4-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download
memory/4240-5-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download
memory/4240-11-0x0000013B3C9C0000-0x0000013B3C9E2000-memory.dmp

Filesize
136KB

Download
memory/4240-18-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download
memory/4240-3-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download
memory/4740-33-0x0000014369010000-0x0000014369060000-memory.dmp

Filesize
320KB

Download
memory/4740-32-0x0000014368E80000-0x0000014368EF6000-memory.dmp

Filesize
472KB

Download
memory/4740-34-0x00000143504C0000-0x00000143504DE000-memory.dmp

Filesize
120KB

Download
memory/4740-1-0x000001434E7E0000-0x000001434E820000-memory.dmp

Filesize
256KB

Download
memory/4740-0-0x00007FFD64AA3000-0x00007FFD64AA5000-memory.dmp

Filesize
8KB

Download
memory/4740-72-0x00000143504E0000-0x00000143504F2000-memory.dmp

Filesize
72KB

Download
memory/4740-71-0x000001434ECD0000-0x000001434ECDA000-memory.dmp

Filesize
40KB

Download
memory/4740-2-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download
memory/4740-88-0x00007FFD64AA3000-0x00007FFD64AA5000-memory.dmp

Filesize
8KB

Download
memory/4740-89-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download
memory/4740-94-0x00007FFD64AA0000-0x00007FFD65561000-memory.dmp

Filesize
10.8MB

Download