Malware Analysis Report

2024-10-10 10:06

Sample ID 240428-wr8easdg6y
Target Umbral.exe
SHA256 cb32d0fc4534e19ae8009edacbe41b2aac5755b8c7bf233fd4c9b39a00f9b318
Tags
umbral stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

cb32d0fc4534e19ae8009edacbe41b2aac5755b8c7bf233fd4c9b39a00f9b318

Threat Level: Known bad

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

Malicious Activity Summary

umbral stealer

Detect Umbral payload

Umbral family

Umbral

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-28 18:10

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

2024-04-28 18:10

Reported

2024-04-28 18:13

Platform

win7-20240221-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Umbral.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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1968 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 1968 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 1968 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe

Processes

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

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

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

"wmic.exe" csproduct get uuid

Network

Country Destination Domain Proto
US 8.8.8.8:53 gstatic.com udp
GB 216.58.201.99:443 gstatic.com tcp

Files

memory/1968-0-0x00000000000F0000-0x0000000000130000-memory.dmp

memory/1968-1-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

memory/1968-2-0x000000001A8A0000-0x000000001A920000-memory.dmp

memory/1968-3-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-28 18:10

Reported

2024-04-28 18:13

Platform

win10v2004-20240419-en

Max time kernel

144s

Max time network

149s

Command Line

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

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 gstatic.com udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa 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/4768-0-0x000001FE32250000-0x000001FE32290000-memory.dmp

memory/4768-1-0x00007FFCCA320000-0x00007FFCCADE1000-memory.dmp

memory/4768-2-0x000001FE4C800000-0x000001FE4C810000-memory.dmp

memory/4768-3-0x00007FFCCA320000-0x00007FFCCADE1000-memory.dmp

memory/4768-4-0x000001FE4C800000-0x000001FE4C810000-memory.dmp