Malware Analysis Report

2024-10-10 09:56

Sample ID 240629-ptmgaa1ajr
Target Start.bat
SHA256 791d000badab89e84dac09066f475c877ad8ea07c5da080cc1ffbff77b3e886b
Tags
umbral execution 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

791d000badab89e84dac09066f475c877ad8ea07c5da080cc1ffbff77b3e886b

Threat Level: Known bad

The file Start.bat was found to be: Known bad.

Malicious Activity Summary

umbral execution spyware stealer

Umbral

Umbral family

Detect Umbral payload

Command and Scripting Interpreter: PowerShell

Drops file in Drivers directory

Reads user/profile data of web browsers

Deletes itself

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Unsigned PE

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Detects videocard installed

Runs ping.exe

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-29 12:37

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

2024-06-29 12:37

Reported

2024-06-29 12:37

Platform

win7-20240611-en

Max time kernel

7s

Max time network

5s

Command Line

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

Signatures

Detect Umbral payload

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

Umbral

stealer umbral

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

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\Start.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\Start.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: 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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2072 wrote to memory of 2384 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 2384 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 2384 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 3032 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\system32\attrib.exe
PID 2072 wrote to memory of 3032 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\system32\attrib.exe
PID 2072 wrote to memory of 3032 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\system32\attrib.exe
PID 2072 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2188 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1636 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1636 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1636 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 780 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 780 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 780 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2072 wrote to memory of 1768 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1768 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 1768 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\System32\Wbem\wmic.exe
PID 2072 wrote to memory of 2804 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\system32\cmd.exe
PID 2072 wrote to memory of 2804 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\system32\cmd.exe
PID 2072 wrote to memory of 2804 N/A C:\Users\Admin\AppData\Local\Temp\Start.exe C:\Windows\system32\cmd.exe
PID 2804 wrote to memory of 1712 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 2804 wrote to memory of 1712 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 2804 wrote to memory of 1712 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\Start.exe

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

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

"wmic.exe" csproduct get uuid

C:\Windows\system32\attrib.exe

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

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

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

C:\Windows\system32\PING.EXE

ping localhost

Network

Country Destination Domain Proto
US 8.8.8.8:53 gstatic.com udp
GB 172.217.16.227:443 gstatic.com tcp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 discord.com udp
US 162.159.128.233:443 discord.com tcp

Files

memory/2072-0-0x000007FEF55A3000-0x000007FEF55A4000-memory.dmp

memory/2072-1-0x00000000011F0000-0x0000000001230000-memory.dmp

memory/2072-2-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

memory/2188-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

memory/2188-8-0x0000000002860000-0x0000000002868000-memory.dmp

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

MD5 3c21ad34145125435128227c0aa5cb54
SHA1 7d515e0acfb066d25abd5d975b68ef01f69b00c8
SHA256 f7161f4cfc6c94f981337520f9370fd78e5968863264ec08d232532110468487
SHA512 2be7eb4f07696de6065ff840106b18ebe1f9607a9bc883604c2105e4fcc55f599e5f50e81aad085a4b1aabe4c5bf8609f72484cf1dfbaf6bd89e61bce4b16544

memory/2656-14-0x000000001B750000-0x000000001BA32000-memory.dmp

memory/2656-15-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/1928-45-0x0000000001F00000-0x0000000001F08000-memory.dmp

memory/2072-50-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-29 12:37

Reported

2024-06-29 12:37

Platform

win10v2004-20240508-en

Max time kernel

12s

Max time network

18s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Start.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\Start.exe N/A

Processes

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

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

Network

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

Files

memory/4920-0-0x0000023015D00000-0x0000023015D40000-memory.dmp

memory/4920-1-0x00007FF980EF3000-0x00007FF980EF5000-memory.dmp

memory/4920-2-0x00007FF980EF0000-0x00007FF9819B1000-memory.dmp