umbral | cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-01-2025 04:45

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General

Target

cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe
Size

496KB
MD5

5679fd7303147ee1bc6c4adc979de286
SHA1

65354bef2646e0d6536ed4ca614839c4e245ad16
SHA256

cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16
SHA512

6d0f2241a55c1549cc9e02fdd7f0368548a3c933772ffb5a8a3bf47a9743470fe017f4bf6e5dad0f4b87111416418db67b6cb4a887378ee3ef88554e0f80c221
SSDEEP

12288:ZoZ1tlRk83Mlp6BpcCFdWXp8aLLy5MvOAs:q5r3bBpcCFdWXp8aLLy5yq

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1852-1-0x0000000000870000-0x00000000008F2000-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
2824	powershell.exe
2628	powershell.exe
2140	powershell.exe
1916	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe

Deletes itself 1 IoCs

pid	Process
1964	cmd.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

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
1964	cmd.exe
2316	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2112	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2316	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe
2824	powershell.exe
1916	powershell.exe
2628	powershell.exe
1804	powershell.exe
2140	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe
Token: SeIncreaseQuotaPrivilege	2932	wmic.exe
Token: SeSecurityPrivilege	2932	wmic.exe
Token: SeTakeOwnershipPrivilege	2932	wmic.exe
Token: SeLoadDriverPrivilege	2932	wmic.exe
Token: SeSystemProfilePrivilege	2932	wmic.exe
Token: SeSystemtimePrivilege	2932	wmic.exe
Token: SeProfSingleProcessPrivilege	2932	wmic.exe
Token: SeIncBasePriorityPrivilege	2932	wmic.exe
Token: SeCreatePagefilePrivilege	2932	wmic.exe
Token: SeBackupPrivilege	2932	wmic.exe
Token: SeRestorePrivilege	2932	wmic.exe
Token: SeShutdownPrivilege	2932	wmic.exe
Token: SeDebugPrivilege	2932	wmic.exe
Token: SeSystemEnvironmentPrivilege	2932	wmic.exe
Token: SeRemoteShutdownPrivilege	2932	wmic.exe
Token: SeUndockPrivilege	2932	wmic.exe
Token: SeManageVolumePrivilege	2932	wmic.exe
Token: 33	2932	wmic.exe
Token: 34	2932	wmic.exe
Token: 35	2932	wmic.exe
Token: SeIncreaseQuotaPrivilege	2932	wmic.exe
Token: SeSecurityPrivilege	2932	wmic.exe
Token: SeTakeOwnershipPrivilege	2932	wmic.exe
Token: SeLoadDriverPrivilege	2932	wmic.exe
Token: SeSystemProfilePrivilege	2932	wmic.exe
Token: SeSystemtimePrivilege	2932	wmic.exe
Token: SeProfSingleProcessPrivilege	2932	wmic.exe
Token: SeIncBasePriorityPrivilege	2932	wmic.exe
Token: SeCreatePagefilePrivilege	2932	wmic.exe
Token: SeBackupPrivilege	2932	wmic.exe
Token: SeRestorePrivilege	2932	wmic.exe
Token: SeShutdownPrivilege	2932	wmic.exe
Token: SeDebugPrivilege	2932	wmic.exe
Token: SeSystemEnvironmentPrivilege	2932	wmic.exe
Token: SeRemoteShutdownPrivilege	2932	wmic.exe
Token: SeUndockPrivilege	2932	wmic.exe
Token: SeManageVolumePrivilege	2932	wmic.exe
Token: 33	2932	wmic.exe
Token: 34	2932	wmic.exe
Token: 35	2932	wmic.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeDebugPrivilege	1916	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeIncreaseQuotaPrivilege	300	wmic.exe
Token: SeSecurityPrivilege	300	wmic.exe
Token: SeTakeOwnershipPrivilege	300	wmic.exe
Token: SeLoadDriverPrivilege	300	wmic.exe
Token: SeSystemProfilePrivilege	300	wmic.exe
Token: SeSystemtimePrivilege	300	wmic.exe
Token: SeProfSingleProcessPrivilege	300	wmic.exe
Token: SeIncBasePriorityPrivilege	300	wmic.exe
Token: SeCreatePagefilePrivilege	300	wmic.exe
Token: SeBackupPrivilege	300	wmic.exe
Token: SeRestorePrivilege	300	wmic.exe
Token: SeShutdownPrivilege	300	wmic.exe
Token: SeDebugPrivilege	300	wmic.exe
Token: SeSystemEnvironmentPrivilege	300	wmic.exe
Token: SeRemoteShutdownPrivilege	300	wmic.exe
Token: SeUndockPrivilege	300	wmic.exe
Token: SeManageVolumePrivilege	300	wmic.exe
Token: 33	300	wmic.exe
Token: 34	300	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 2932	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	30
PID 1852 wrote to memory of 2932	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	30
PID 1852 wrote to memory of 2932	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	30
PID 1852 wrote to memory of 2716	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	33
PID 1852 wrote to memory of 2716	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	33
PID 1852 wrote to memory of 2716	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	33
PID 1852 wrote to memory of 2824	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	35
PID 1852 wrote to memory of 2824	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	35
PID 1852 wrote to memory of 2824	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	35
PID 1852 wrote to memory of 1916	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	37
PID 1852 wrote to memory of 1916	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	37
PID 1852 wrote to memory of 1916	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	37
PID 1852 wrote to memory of 2628	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	39
PID 1852 wrote to memory of 2628	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	39
PID 1852 wrote to memory of 2628	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	39
PID 1852 wrote to memory of 1804	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	41
PID 1852 wrote to memory of 1804	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	41
PID 1852 wrote to memory of 1804	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	41
PID 1852 wrote to memory of 300	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	43
PID 1852 wrote to memory of 300	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	43
PID 1852 wrote to memory of 300	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	43
PID 1852 wrote to memory of 1684	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	45
PID 1852 wrote to memory of 1684	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	45
PID 1852 wrote to memory of 1684	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	45
PID 1852 wrote to memory of 592	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	47
PID 1852 wrote to memory of 592	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	47
PID 1852 wrote to memory of 592	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	47
PID 1852 wrote to memory of 2140	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	49
PID 1852 wrote to memory of 2140	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	49
PID 1852 wrote to memory of 2140	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	49
PID 1852 wrote to memory of 2112	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	51
PID 1852 wrote to memory of 2112	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	51
PID 1852 wrote to memory of 2112	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	51
PID 1852 wrote to memory of 1964	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	53
PID 1852 wrote to memory of 1964	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	53
PID 1852 wrote to memory of 1964	1852	cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe	53
PID 1964 wrote to memory of 2316	1964	cmd.exe	55
PID 1964 wrote to memory of 2316	1964	cmd.exe	55
PID 1964 wrote to memory of 2316	1964	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2716	attrib.exe

C:\Users\Admin\AppData\Local\Temp\cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe
"C:\Users\Admin\AppData\Local\Temp\cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2932
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe"
  2⤵
  - Views/modifies file attributes
  PID:2716
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2824
- 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:1916
- 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:2628
- 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:1804
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:300
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:592
- 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:2140
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2112
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1964
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2316

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

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 Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
bafee63f6db06c9f48a02dfeef811619

SHA1
d1aa4cd88d2bbc44d519c42d54e46e030deb9ab6

SHA256
c44bdf587429d3b81b3450d239d4ba1078f86c31c3011ccd711d302925022aae

SHA512
7db7986e59f29aab53f6c491abcd02de66c11903806e84b79b193cb2d9f2041b68a847935e19e4434b33a6d45c46b96992d6b54022c9b491a5863482ac31dbe9

Download Submit
memory/1852-0-0x000007FEF5683000-0x000007FEF5684000-memory.dmp

Filesize
4KB

Download
memory/1852-1-0x0000000000870000-0x00000000008F2000-memory.dmp

Filesize
520KB

Download
memory/1852-2-0x000007FEF5680000-0x000007FEF606C000-memory.dmp

Filesize
9.9MB

Download
memory/1852-47-0x000007FEF5680000-0x000007FEF606C000-memory.dmp

Filesize
9.9MB

Download
memory/1916-14-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/1916-15-0x0000000002040000-0x0000000002048000-memory.dmp

Filesize
32KB

Download
memory/2140-43-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download
memory/2824-7-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2824-8-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download