umbral | b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
04/09/2024, 02:11

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General

Target

b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe
Size

229KB
MD5

83b81dda82a62350b52ee97a12d3163a
SHA1

3e7c9d5eda676771071fa77ce8f357b0c32673fa
SHA256

b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf
SHA512

e0d0d47479b19287dbb731b0025c458623fa17e77d506756a7e90289abf0c04faa5e655bd2f521ead68d3c8530cb4ecaf1cb1c48e1fe2e03759affe8c0c4ca04
SSDEEP

6144:lloZM9fsXtioRkts/cnnK6cMlxDKxX8il927De8NhoREb8e1muoi:noZXtlRk83MlxDKxX8il927De8NhoOJ

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/228-1-0x000002721BA10000-0x000002721BA50000-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
728	powershell.exe
468	powershell.exe
2808	powershell.exe
1660	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.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

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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1464	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
728	powershell.exe
728	powershell.exe
2808	powershell.exe
2808	powershell.exe
1660	powershell.exe
1660	powershell.exe
3464	powershell.exe
3464	powershell.exe
468	powershell.exe
468	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe
Token: SeDebugPrivilege	728	powershell.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	1660	powershell.exe
Token: SeDebugPrivilege	3464	powershell.exe
Token: SeIncreaseQuotaPrivilege	5088	wmic.exe
Token: SeSecurityPrivilege	5088	wmic.exe
Token: SeTakeOwnershipPrivilege	5088	wmic.exe
Token: SeLoadDriverPrivilege	5088	wmic.exe
Token: SeSystemProfilePrivilege	5088	wmic.exe
Token: SeSystemtimePrivilege	5088	wmic.exe
Token: SeProfSingleProcessPrivilege	5088	wmic.exe
Token: SeIncBasePriorityPrivilege	5088	wmic.exe
Token: SeCreatePagefilePrivilege	5088	wmic.exe
Token: SeBackupPrivilege	5088	wmic.exe
Token: SeRestorePrivilege	5088	wmic.exe
Token: SeShutdownPrivilege	5088	wmic.exe
Token: SeDebugPrivilege	5088	wmic.exe
Token: SeSystemEnvironmentPrivilege	5088	wmic.exe
Token: SeRemoteShutdownPrivilege	5088	wmic.exe
Token: SeUndockPrivilege	5088	wmic.exe
Token: SeManageVolumePrivilege	5088	wmic.exe
Token: 33	5088	wmic.exe
Token: 34	5088	wmic.exe
Token: 35	5088	wmic.exe
Token: 36	5088	wmic.exe
Token: SeIncreaseQuotaPrivilege	5088	wmic.exe
Token: SeSecurityPrivilege	5088	wmic.exe
Token: SeTakeOwnershipPrivilege	5088	wmic.exe
Token: SeLoadDriverPrivilege	5088	wmic.exe
Token: SeSystemProfilePrivilege	5088	wmic.exe
Token: SeSystemtimePrivilege	5088	wmic.exe
Token: SeProfSingleProcessPrivilege	5088	wmic.exe
Token: SeIncBasePriorityPrivilege	5088	wmic.exe
Token: SeCreatePagefilePrivilege	5088	wmic.exe
Token: SeBackupPrivilege	5088	wmic.exe
Token: SeRestorePrivilege	5088	wmic.exe
Token: SeShutdownPrivilege	5088	wmic.exe
Token: SeDebugPrivilege	5088	wmic.exe
Token: SeSystemEnvironmentPrivilege	5088	wmic.exe
Token: SeRemoteShutdownPrivilege	5088	wmic.exe
Token: SeUndockPrivilege	5088	wmic.exe
Token: SeManageVolumePrivilege	5088	wmic.exe
Token: 33	5088	wmic.exe
Token: 34	5088	wmic.exe
Token: 35	5088	wmic.exe
Token: 36	5088	wmic.exe
Token: SeIncreaseQuotaPrivilege	1880	wmic.exe
Token: SeSecurityPrivilege	1880	wmic.exe
Token: SeTakeOwnershipPrivilege	1880	wmic.exe
Token: SeLoadDriverPrivilege	1880	wmic.exe
Token: SeSystemProfilePrivilege	1880	wmic.exe
Token: SeSystemtimePrivilege	1880	wmic.exe
Token: SeProfSingleProcessPrivilege	1880	wmic.exe
Token: SeIncBasePriorityPrivilege	1880	wmic.exe
Token: SeCreatePagefilePrivilege	1880	wmic.exe
Token: SeBackupPrivilege	1880	wmic.exe
Token: SeRestorePrivilege	1880	wmic.exe
Token: SeShutdownPrivilege	1880	wmic.exe
Token: SeDebugPrivilege	1880	wmic.exe
Token: SeSystemEnvironmentPrivilege	1880	wmic.exe
Token: SeRemoteShutdownPrivilege	1880	wmic.exe
Token: SeUndockPrivilege	1880	wmic.exe
Token: SeManageVolumePrivilege	1880	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 728	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	85
PID 228 wrote to memory of 728	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	85
PID 228 wrote to memory of 2808	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	87
PID 228 wrote to memory of 2808	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	87
PID 228 wrote to memory of 1660	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	90
PID 228 wrote to memory of 1660	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	90
PID 228 wrote to memory of 3464	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	92
PID 228 wrote to memory of 3464	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	92
PID 228 wrote to memory of 5088	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	96
PID 228 wrote to memory of 5088	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	96
PID 228 wrote to memory of 1880	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	99
PID 228 wrote to memory of 1880	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	99
PID 228 wrote to memory of 5064	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	101
PID 228 wrote to memory of 5064	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	101
PID 228 wrote to memory of 468	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	103
PID 228 wrote to memory of 468	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	103
PID 228 wrote to memory of 1464	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	106
PID 228 wrote to memory of 1464	228	b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe	106

C:\Users\Admin\AppData\Local\Temp\b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe
"C:\Users\Admin\AppData\Local\Temp\b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:228
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:728
- 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:2808
- 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:1660
- 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:3464
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1880
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5064
- 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:468
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1464

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

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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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
2af06a6b36db9473e4a7d9c7ab72b70b

SHA1
8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645

SHA256
18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158

SHA512
3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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_0lx5r3zy.1ps.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/228-71-0x000002721D7E0000-0x000002721D7EA000-memory.dmp

Filesize
40KB

Download
memory/228-35-0x000002721BF90000-0x000002721BFAE000-memory.dmp

Filesize
120KB

Download
memory/228-91-0x00007FF850B80000-0x00007FF851641000-memory.dmp

Filesize
10.8MB

Download
memory/228-90-0x0000027235FC0000-0x00000272360C2000-memory.dmp

Filesize
1.0MB

Download
memory/228-2-0x00007FF850B80000-0x00007FF851641000-memory.dmp

Filesize
10.8MB

Download
memory/228-33-0x0000027236310000-0x0000027236386000-memory.dmp

Filesize
472KB

Download
memory/228-34-0x000002721D830000-0x000002721D880000-memory.dmp

Filesize
320KB

Download
memory/228-72-0x000002721D880000-0x000002721D892000-memory.dmp

Filesize
72KB

Download
memory/228-1-0x000002721BA10000-0x000002721BA50000-memory.dmp

Filesize
256KB

Download
memory/228-0-0x00007FF850B83000-0x00007FF850B85000-memory.dmp

Filesize
8KB

Download
memory/728-14-0x00007FF850B80000-0x00007FF851641000-memory.dmp

Filesize
10.8MB

Download
memory/728-17-0x00007FF850B80000-0x00007FF851641000-memory.dmp

Filesize
10.8MB

Download
memory/728-13-0x00007FF850B80000-0x00007FF851641000-memory.dmp

Filesize
10.8MB

Download
memory/728-12-0x000001EB4D940000-0x000001EB4D962000-memory.dmp

Filesize
136KB

Download
memory/728-18-0x00007FF850B80000-0x00007FF851641000-memory.dmp

Filesize
10.8MB

Download