umbral | 791d000badab89e84dac09066f475c877ad8ea07c5da080cc1ffbff77b3e886b

Analysis

max time kernel
7s
max time network
5s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
29/06/2024, 12:37

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Start.exe
Size

229KB
MD5

ad7985437149caea11bef60b8a5ef81a
SHA1

e098454f7c03a1ed404ee323d686c35839ac4def
SHA256

791d000badab89e84dac09066f475c877ad8ea07c5da080cc1ffbff77b3e886b
SHA512

22867a2fb56af5720b18ca01e1195eefee4cd0ced017e40a929b2587889392fbe99e68729aaefee736817afcf69ca49c411ed93b7edee736c12f32ee933f70e9
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD48fQtxox8e1mNwi:voZtL+EP8Ugx6s

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2072-1-0x00000000011F0000-0x0000000001230000-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
2188	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2804	cmd.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
7	discord.com
8	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1768	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1712	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2072	Start.exe
2188	powershell.exe
2656	powershell.exe
2636	powershell.exe
1752	powershell.exe
1928	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	Start.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe
Token: 35	2384	wmic.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe
Token: 35	2384	wmic.exe
Token: SeDebugPrivilege	2188	powershell.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	2636	powershell.exe
Token: SeDebugPrivilege	1752	powershell.exe
Token: SeIncreaseQuotaPrivilege	1636	wmic.exe
Token: SeSecurityPrivilege	1636	wmic.exe
Token: SeTakeOwnershipPrivilege	1636	wmic.exe
Token: SeLoadDriverPrivilege	1636	wmic.exe
Token: SeSystemProfilePrivilege	1636	wmic.exe
Token: SeSystemtimePrivilege	1636	wmic.exe
Token: SeProfSingleProcessPrivilege	1636	wmic.exe
Token: SeIncBasePriorityPrivilege	1636	wmic.exe
Token: SeCreatePagefilePrivilege	1636	wmic.exe
Token: SeBackupPrivilege	1636	wmic.exe
Token: SeRestorePrivilege	1636	wmic.exe
Token: SeShutdownPrivilege	1636	wmic.exe
Token: SeDebugPrivilege	1636	wmic.exe
Token: SeSystemEnvironmentPrivilege	1636	wmic.exe
Token: SeRemoteShutdownPrivilege	1636	wmic.exe
Token: SeUndockPrivilege	1636	wmic.exe
Token: SeManageVolumePrivilege	1636	wmic.exe
Token: 33	1636	wmic.exe
Token: 34	1636	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2384	2072	Start.exe	28
PID 2072 wrote to memory of 2384	2072	Start.exe	28
PID 2072 wrote to memory of 2384	2072	Start.exe	28
PID 2072 wrote to memory of 3032	2072	Start.exe	31
PID 2072 wrote to memory of 3032	2072	Start.exe	31
PID 2072 wrote to memory of 3032	2072	Start.exe	31
PID 2072 wrote to memory of 2188	2072	Start.exe	33
PID 2072 wrote to memory of 2188	2072	Start.exe	33
PID 2072 wrote to memory of 2188	2072	Start.exe	33
PID 2072 wrote to memory of 2656	2072	Start.exe	35
PID 2072 wrote to memory of 2656	2072	Start.exe	35
PID 2072 wrote to memory of 2656	2072	Start.exe	35
PID 2072 wrote to memory of 2636	2072	Start.exe	37
PID 2072 wrote to memory of 2636	2072	Start.exe	37
PID 2072 wrote to memory of 2636	2072	Start.exe	37
PID 2072 wrote to memory of 1752	2072	Start.exe	39
PID 2072 wrote to memory of 1752	2072	Start.exe	39
PID 2072 wrote to memory of 1752	2072	Start.exe	39
PID 2072 wrote to memory of 1636	2072	Start.exe	41
PID 2072 wrote to memory of 1636	2072	Start.exe	41
PID 2072 wrote to memory of 1636	2072	Start.exe	41
PID 2072 wrote to memory of 780	2072	Start.exe	43
PID 2072 wrote to memory of 780	2072	Start.exe	43
PID 2072 wrote to memory of 780	2072	Start.exe	43
PID 2072 wrote to memory of 1660	2072	Start.exe	45
PID 2072 wrote to memory of 1660	2072	Start.exe	45
PID 2072 wrote to memory of 1660	2072	Start.exe	45
PID 2072 wrote to memory of 1928	2072	Start.exe	47
PID 2072 wrote to memory of 1928	2072	Start.exe	47
PID 2072 wrote to memory of 1928	2072	Start.exe	47
PID 2072 wrote to memory of 1768	2072	Start.exe	49
PID 2072 wrote to memory of 1768	2072	Start.exe	49
PID 2072 wrote to memory of 1768	2072	Start.exe	49
PID 2072 wrote to memory of 2804	2072	Start.exe	51
PID 2072 wrote to memory of 2804	2072	Start.exe	51
PID 2072 wrote to memory of 2804	2072	Start.exe	51
PID 2804 wrote to memory of 1712	2804	cmd.exe	53
PID 2804 wrote to memory of 1712	2804	cmd.exe	53
PID 2804 wrote to memory of 1712	2804	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3032	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Start.exe
"C:\Users\Admin\AppData\Local\Temp\Start.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2384
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Start.exe"
  2⤵
  - Views/modifies file attributes
  PID:3032
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Start.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2188
- 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:2656
- 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:2636
- 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:1752
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1636
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:780
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1660
- 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:1928
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1768
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Start.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1712

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
7KB

MD5
3c21ad34145125435128227c0aa5cb54

SHA1
7d515e0acfb066d25abd5d975b68ef01f69b00c8

SHA256
f7161f4cfc6c94f981337520f9370fd78e5968863264ec08d232532110468487

SHA512
2be7eb4f07696de6065ff840106b18ebe1f9607a9bc883604c2105e4fcc55f599e5f50e81aad085a4b1aabe4c5bf8609f72484cf1dfbaf6bd89e61bce4b16544

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

Filesize
32KB

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

Filesize
4KB

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

Filesize
256KB

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

Filesize
9.9MB

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

Filesize
9.9MB

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

Filesize
2.9MB

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

Filesize
32KB

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

Filesize
2.9MB

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

Filesize
32KB

Download