Malware Analysis Report

2024-10-10 10:09

Sample ID 240426-qectzacc96
Target Umbral3.exe
SHA256 e4e4f9045dc3683a2a69b9c7625f2ff46ed241ff64b47660a039dbc9d34cb0d5
Tags
umbral spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

e4e4f9045dc3683a2a69b9c7625f2ff46ed241ff64b47660a039dbc9d34cb0d5

Threat Level: Known bad

The file Umbral3.exe was found to be: Known bad.

Malicious Activity Summary

umbral spyware stealer

Umbral family

Detect Umbral payload

Umbral

Drops file in Drivers directory

Deletes itself

Reads user/profile data of web browsers

Looks up external IP address via web service

Legitimate hosting services abused for malware hosting/C2

Unsigned PE

Runs ping.exe

Views/modifies file attributes

Suspicious use of WriteProcessMemory

Detects videocard installed

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-26 13:10

Signatures

Detect Umbral payload

Description Indicator Process Target
N/A N/A N/A N/A

Umbral family

umbral

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-26 13:10

Reported

2024-04-26 13:12

Platform

win7-20240221-en

Max time kernel

119s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Umbral3.exe"

Signatures

Detect Umbral payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Umbral

stealer umbral

Drops file in Drivers directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\drivers\etc\hosts C:\Users\Admin\AppData\Local\Temp\Umbral3.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\system32\cmd.exe N/A

Reads user/profile data of web browsers

spyware stealer

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Detects videocard installed

Description Indicator Process Target
N/A N/A C:\Windows\System32\Wbem\wmic.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\wmic.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2932 wrote to memory of 296 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\system32\attrib.exe
PID 2932 wrote to memory of 296 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\system32\attrib.exe
PID 2932 wrote to memory of 296 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\system32\attrib.exe
PID 2932 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 828 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 828 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 828 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 2772 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 2772 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 2772 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 2820 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2932 wrote to memory of 1724 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 1724 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 1724 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\System32\Wbem\wmic.exe
PID 2932 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\system32\cmd.exe
PID 2932 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\system32\cmd.exe
PID 2932 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe C:\Windows\system32\cmd.exe
PID 1920 wrote to memory of 2800 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 1920 wrote to memory of 2800 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 1920 wrote to memory of 2800 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Umbral3.exe

"C:\Users\Admin\AppData\Local\Temp\Umbral3.exe"

C:\Windows\system32\attrib.exe

"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral3.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral3.exe'

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

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" os get Caption

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" computersystem get totalphysicalmemory

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" csproduct get uuid

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER

C:\Windows\System32\Wbem\wmic.exe

"wmic" path win32_VideoController get name

C:\Windows\system32\cmd.exe

"cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral3.exe" && pause

C:\Windows\system32\PING.EXE

ping localhost

Network

Country Destination Domain Proto
US 8.8.8.8:53 gstatic.com udp
GB 216.58.201.99:443 gstatic.com tcp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 discord.com udp
US 162.159.138.232:443 discord.com tcp

Files

memory/2932-0-0x00000000008C0000-0x0000000000900000-memory.dmp

memory/2932-1-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

memory/2932-2-0x000000001B180000-0x000000001B200000-memory.dmp

memory/2604-7-0x000000001B7E0000-0x000000001BAC2000-memory.dmp

memory/2604-8-0x00000000022D0000-0x00000000022D8000-memory.dmp

memory/2604-9-0x000007FEEDAA0000-0x000007FEEE43D000-memory.dmp

memory/2604-10-0x0000000002910000-0x0000000002990000-memory.dmp

memory/2604-11-0x000007FEEDAA0000-0x000007FEEE43D000-memory.dmp

memory/2604-12-0x0000000002910000-0x0000000002990000-memory.dmp

memory/2604-13-0x0000000002910000-0x0000000002990000-memory.dmp

memory/2604-14-0x0000000002910000-0x0000000002990000-memory.dmp

memory/2604-15-0x000007FEEDAA0000-0x000007FEEE43D000-memory.dmp

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

MD5 4c3dada670799e9495dd6c1b6e6814be
SHA1 102d41dbc2ae9e1ceba8b3674d4ed7ce1093ea9d
SHA256 4e5fb77e235bca233d56f18bae4d353d864fa70c74cb8403e059974a73b27f40
SHA512 9e222c7efcba8858a324056f7e37a9b1d9cc893a4d35171718545a2de480376830f8ee14beb0efe28c811ff11d2a8c4b75348602e89e5a6d0ab1cc0a675a3c09

memory/3044-21-0x000000001B5B0000-0x000000001B892000-memory.dmp

memory/3044-22-0x0000000002860000-0x0000000002868000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/2820-50-0x0000000001E80000-0x0000000001E88000-memory.dmp

memory/2932-54-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-26 13:10

Reported

2024-04-26 13:12

Platform

win10v2004-20240419-en

Max time kernel

144s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Umbral3.exe"

Signatures

Detect Umbral payload

Description Indicator Process Target
N/A N/A N/A N/A

Umbral

stealer umbral

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Umbral3.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Umbral3.exe

"C:\Users\Admin\AppData\Local\Temp\Umbral3.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 gstatic.com udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 gstatic.com udp
US 8.8.8.8:53 gstatic.com udp

Files

memory/4128-0-0x0000029AF3640000-0x0000029AF3680000-memory.dmp

memory/4128-1-0x00007FF850090000-0x00007FF850B51000-memory.dmp

memory/4128-2-0x0000029AF5450000-0x0000029AF5460000-memory.dmp

memory/4128-3-0x00007FF850090000-0x00007FF850B51000-memory.dmp