umbral | b9d84636a9359f58b03287d8e8db195c45d6557b02f657073144707db483f001

Resubmissions

29-06-2024 16:53

240629-vd8x8s1fqg 10

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
29-06-2024 16:53

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General

Target

DLL Injector.exe
Size

232KB
MD5

3e87aa76b31c95481d99fb7960ce96f4
SHA1

bcd61df3abd7245df27a250996138675b258f01e
SHA256

8c18bb102c70d83000ae6d6f784da47b86a78359b2e6edfbfe915cb16ccb9a2a
SHA512

574d79517027edd422d857272d8a14d751c0b64851e2bd0cf6a698a56284a0b17783a209d405d09542b4c3fc044af2b02304293d4522a169cde8da684350c6dc
SSDEEP

6144:8loZMLrIkd8g+EtXHkv/iD4rPS0pbhS6F6AxDeebfHb8e1mo5iH/:aoZ0L+EP8rPS0pbhS6F6AxDeebLGH/

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral5/memory/2200-1-0x0000000000D10000-0x0000000000D50000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2256	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Reads user/profile data of web browsers 2 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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
9	discord.com
10	discord.com

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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
644	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2200	DLL Injector.exe
2256	powershell.exe
2560	powershell.exe
3000	powershell.exe
3044	powershell.exe
2880	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	DLL Injector.exe
Token: SeIncreaseQuotaPrivilege	2684	wmic.exe
Token: SeSecurityPrivilege	2684	wmic.exe
Token: SeTakeOwnershipPrivilege	2684	wmic.exe
Token: SeLoadDriverPrivilege	2684	wmic.exe
Token: SeSystemProfilePrivilege	2684	wmic.exe
Token: SeSystemtimePrivilege	2684	wmic.exe
Token: SeProfSingleProcessPrivilege	2684	wmic.exe
Token: SeIncBasePriorityPrivilege	2684	wmic.exe
Token: SeCreatePagefilePrivilege	2684	wmic.exe
Token: SeBackupPrivilege	2684	wmic.exe
Token: SeRestorePrivilege	2684	wmic.exe
Token: SeShutdownPrivilege	2684	wmic.exe
Token: SeDebugPrivilege	2684	wmic.exe
Token: SeSystemEnvironmentPrivilege	2684	wmic.exe
Token: SeRemoteShutdownPrivilege	2684	wmic.exe
Token: SeUndockPrivilege	2684	wmic.exe
Token: SeManageVolumePrivilege	2684	wmic.exe
Token: 33	2684	wmic.exe
Token: 34	2684	wmic.exe
Token: 35	2684	wmic.exe
Token: SeIncreaseQuotaPrivilege	2684	wmic.exe
Token: SeSecurityPrivilege	2684	wmic.exe
Token: SeTakeOwnershipPrivilege	2684	wmic.exe
Token: SeLoadDriverPrivilege	2684	wmic.exe
Token: SeSystemProfilePrivilege	2684	wmic.exe
Token: SeSystemtimePrivilege	2684	wmic.exe
Token: SeProfSingleProcessPrivilege	2684	wmic.exe
Token: SeIncBasePriorityPrivilege	2684	wmic.exe
Token: SeCreatePagefilePrivilege	2684	wmic.exe
Token: SeBackupPrivilege	2684	wmic.exe
Token: SeRestorePrivilege	2684	wmic.exe
Token: SeShutdownPrivilege	2684	wmic.exe
Token: SeDebugPrivilege	2684	wmic.exe
Token: SeSystemEnvironmentPrivilege	2684	wmic.exe
Token: SeRemoteShutdownPrivilege	2684	wmic.exe
Token: SeUndockPrivilege	2684	wmic.exe
Token: SeManageVolumePrivilege	2684	wmic.exe
Token: 33	2684	wmic.exe
Token: 34	2684	wmic.exe
Token: 35	2684	wmic.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeIncreaseQuotaPrivilege	1612	wmic.exe
Token: SeSecurityPrivilege	1612	wmic.exe
Token: SeTakeOwnershipPrivilege	1612	wmic.exe
Token: SeLoadDriverPrivilege	1612	wmic.exe
Token: SeSystemProfilePrivilege	1612	wmic.exe
Token: SeSystemtimePrivilege	1612	wmic.exe
Token: SeProfSingleProcessPrivilege	1612	wmic.exe
Token: SeIncBasePriorityPrivilege	1612	wmic.exe
Token: SeCreatePagefilePrivilege	1612	wmic.exe
Token: SeBackupPrivilege	1612	wmic.exe
Token: SeRestorePrivilege	1612	wmic.exe
Token: SeShutdownPrivilege	1612	wmic.exe
Token: SeDebugPrivilege	1612	wmic.exe
Token: SeSystemEnvironmentPrivilege	1612	wmic.exe
Token: SeRemoteShutdownPrivilege	1612	wmic.exe
Token: SeUndockPrivilege	1612	wmic.exe
Token: SeManageVolumePrivilege	1612	wmic.exe
Token: 33	1612	wmic.exe
Token: 34	1612	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2684	2200	DLL Injector.exe	28
PID 2200 wrote to memory of 2684	2200	DLL Injector.exe	28
PID 2200 wrote to memory of 2684	2200	DLL Injector.exe	28
PID 2200 wrote to memory of 2256	2200	DLL Injector.exe	31
PID 2200 wrote to memory of 2256	2200	DLL Injector.exe	31
PID 2200 wrote to memory of 2256	2200	DLL Injector.exe	31
PID 2200 wrote to memory of 2560	2200	DLL Injector.exe	33
PID 2200 wrote to memory of 2560	2200	DLL Injector.exe	33
PID 2200 wrote to memory of 2560	2200	DLL Injector.exe	33
PID 2200 wrote to memory of 3000	2200	DLL Injector.exe	35
PID 2200 wrote to memory of 3000	2200	DLL Injector.exe	35
PID 2200 wrote to memory of 3000	2200	DLL Injector.exe	35
PID 2200 wrote to memory of 3044	2200	DLL Injector.exe	37
PID 2200 wrote to memory of 3044	2200	DLL Injector.exe	37
PID 2200 wrote to memory of 3044	2200	DLL Injector.exe	37
PID 2200 wrote to memory of 1612	2200	DLL Injector.exe	39
PID 2200 wrote to memory of 1612	2200	DLL Injector.exe	39
PID 2200 wrote to memory of 1612	2200	DLL Injector.exe	39
PID 2200 wrote to memory of 1620	2200	DLL Injector.exe	41
PID 2200 wrote to memory of 1620	2200	DLL Injector.exe	41
PID 2200 wrote to memory of 1620	2200	DLL Injector.exe	41
PID 2200 wrote to memory of 2848	2200	DLL Injector.exe	43
PID 2200 wrote to memory of 2848	2200	DLL Injector.exe	43
PID 2200 wrote to memory of 2848	2200	DLL Injector.exe	43
PID 2200 wrote to memory of 2880	2200	DLL Injector.exe	45
PID 2200 wrote to memory of 2880	2200	DLL Injector.exe	45
PID 2200 wrote to memory of 2880	2200	DLL Injector.exe	45
PID 2200 wrote to memory of 644	2200	DLL Injector.exe	47
PID 2200 wrote to memory of 644	2200	DLL Injector.exe	47
PID 2200 wrote to memory of 644	2200	DLL Injector.exe	47

C:\Users\Admin\AppData\Local\Temp\DLL Injector.exe
"C:\Users\Admin\AppData\Local\Temp\DLL Injector.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2684
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\DLL Injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2256
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2560
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- 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:3044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1620
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2848
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2880
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:644

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
e5fb91e7ef66db677958dcb2daf191bd

SHA1
d667502451cd887ed2566669a7afbb277f3cce7c

SHA256
e8f08df6dea577d0866ddaa0ebc6cc361fdbed8da0c26c76c6c87b241c1a5830

SHA512
2af00fd868fcfb9181a16fb14e935d3d2e6a044fa1e2fac3521322ea54d9de39ddb823c79ed502f35be7b3cc616d82d72e869a364d5ebf3b43731ab45bcecaf7

Download Submit
memory/2200-0-0x000007FEF5ED3000-0x000007FEF5ED4000-memory.dmp

Filesize
4KB

Download
memory/2200-1-0x0000000000D10000-0x0000000000D50000-memory.dmp

Filesize
256KB

Download
memory/2200-2-0x000007FEF5ED0000-0x000007FEF68BC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-49-0x000007FEF5ED0000-0x000007FEF68BC000-memory.dmp

Filesize
9.9MB

Download
memory/2256-7-0x000000001B600000-0x000000001B8E2000-memory.dmp

Filesize
2.9MB

Download
memory/2256-8-0x0000000002080000-0x0000000002088000-memory.dmp

Filesize
32KB

Download
memory/2560-14-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2560-15-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2880-44-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download