umbral | 2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

Analysis

max time kernel
118s
max time network
126s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
05-06-2024 01:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral.exe
Size

227KB
MD5

53681862212e052e3c6b3e9ca9594428
SHA1

f89c700368b19d182062f673f9b51199e08c47cc
SHA256

2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2
SHA512

2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2968-1-0x00000000012E0000-0x0000000001320000-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
3000	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2272	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
6	discord.com
7	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
1284	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2256	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3000	powershell.exe
3024	powershell.exe
2524	powershell.exe
1296	powershell.exe
308	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	Umbral.exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	3024	powershell.exe
Token: SeDebugPrivilege	2524	powershell.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeIncreaseQuotaPrivilege	2184	wmic.exe
Token: SeSecurityPrivilege	2184	wmic.exe
Token: SeTakeOwnershipPrivilege	2184	wmic.exe
Token: SeLoadDriverPrivilege	2184	wmic.exe
Token: SeSystemProfilePrivilege	2184	wmic.exe
Token: SeSystemtimePrivilege	2184	wmic.exe
Token: SeProfSingleProcessPrivilege	2184	wmic.exe
Token: SeIncBasePriorityPrivilege	2184	wmic.exe
Token: SeCreatePagefilePrivilege	2184	wmic.exe
Token: SeBackupPrivilege	2184	wmic.exe
Token: SeRestorePrivilege	2184	wmic.exe
Token: SeShutdownPrivilege	2184	wmic.exe
Token: SeDebugPrivilege	2184	wmic.exe
Token: SeSystemEnvironmentPrivilege	2184	wmic.exe
Token: SeRemoteShutdownPrivilege	2184	wmic.exe
Token: SeUndockPrivilege	2184	wmic.exe
Token: SeManageVolumePrivilege	2184	wmic.exe
Token: 33	2184	wmic.exe
Token: 34	2184	wmic.exe
Token: 35	2184	wmic.exe
Token: SeIncreaseQuotaPrivilege	2184	wmic.exe
Token: SeSecurityPrivilege	2184	wmic.exe
Token: SeTakeOwnershipPrivilege	2184	wmic.exe
Token: SeLoadDriverPrivilege	2184	wmic.exe
Token: SeSystemProfilePrivilege	2184	wmic.exe
Token: SeSystemtimePrivilege	2184	wmic.exe
Token: SeProfSingleProcessPrivilege	2184	wmic.exe
Token: SeIncBasePriorityPrivilege	2184	wmic.exe
Token: SeCreatePagefilePrivilege	2184	wmic.exe
Token: SeBackupPrivilege	2184	wmic.exe
Token: SeRestorePrivilege	2184	wmic.exe
Token: SeShutdownPrivilege	2184	wmic.exe
Token: SeDebugPrivilege	2184	wmic.exe
Token: SeSystemEnvironmentPrivilege	2184	wmic.exe
Token: SeRemoteShutdownPrivilege	2184	wmic.exe
Token: SeUndockPrivilege	2184	wmic.exe
Token: SeManageVolumePrivilege	2184	wmic.exe
Token: 33	2184	wmic.exe
Token: 34	2184	wmic.exe
Token: 35	2184	wmic.exe
Token: SeIncreaseQuotaPrivilege	2012	wmic.exe
Token: SeSecurityPrivilege	2012	wmic.exe
Token: SeTakeOwnershipPrivilege	2012	wmic.exe
Token: SeLoadDriverPrivilege	2012	wmic.exe
Token: SeSystemProfilePrivilege	2012	wmic.exe
Token: SeSystemtimePrivilege	2012	wmic.exe
Token: SeProfSingleProcessPrivilege	2012	wmic.exe
Token: SeIncBasePriorityPrivilege	2012	wmic.exe
Token: SeCreatePagefilePrivilege	2012	wmic.exe
Token: SeBackupPrivilege	2012	wmic.exe
Token: SeRestorePrivilege	2012	wmic.exe
Token: SeShutdownPrivilege	2012	wmic.exe
Token: SeDebugPrivilege	2012	wmic.exe
Token: SeSystemEnvironmentPrivilege	2012	wmic.exe
Token: SeRemoteShutdownPrivilege	2012	wmic.exe
Token: SeUndockPrivilege	2012	wmic.exe
Token: SeManageVolumePrivilege	2012	wmic.exe
Token: 33	2012	wmic.exe
Token: 34	2012	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2356	2968	Umbral.exe	28
PID 2968 wrote to memory of 2356	2968	Umbral.exe	28
PID 2968 wrote to memory of 2356	2968	Umbral.exe	28
PID 2968 wrote to memory of 3000	2968	Umbral.exe	30
PID 2968 wrote to memory of 3000	2968	Umbral.exe	30
PID 2968 wrote to memory of 3000	2968	Umbral.exe	30
PID 2968 wrote to memory of 3024	2968	Umbral.exe	32
PID 2968 wrote to memory of 3024	2968	Umbral.exe	32
PID 2968 wrote to memory of 3024	2968	Umbral.exe	32
PID 2968 wrote to memory of 2524	2968	Umbral.exe	34
PID 2968 wrote to memory of 2524	2968	Umbral.exe	34
PID 2968 wrote to memory of 2524	2968	Umbral.exe	34
PID 2968 wrote to memory of 1296	2968	Umbral.exe	36
PID 2968 wrote to memory of 1296	2968	Umbral.exe	36
PID 2968 wrote to memory of 1296	2968	Umbral.exe	36
PID 2968 wrote to memory of 2184	2968	Umbral.exe	38
PID 2968 wrote to memory of 2184	2968	Umbral.exe	38
PID 2968 wrote to memory of 2184	2968	Umbral.exe	38
PID 2968 wrote to memory of 2012	2968	Umbral.exe	41
PID 2968 wrote to memory of 2012	2968	Umbral.exe	41
PID 2968 wrote to memory of 2012	2968	Umbral.exe	41
PID 2968 wrote to memory of 1936	2968	Umbral.exe	43
PID 2968 wrote to memory of 1936	2968	Umbral.exe	43
PID 2968 wrote to memory of 1936	2968	Umbral.exe	43
PID 2968 wrote to memory of 308	2968	Umbral.exe	45
PID 2968 wrote to memory of 308	2968	Umbral.exe	45
PID 2968 wrote to memory of 308	2968	Umbral.exe	45
PID 2968 wrote to memory of 1284	2968	Umbral.exe	47
PID 2968 wrote to memory of 1284	2968	Umbral.exe	47
PID 2968 wrote to memory of 1284	2968	Umbral.exe	47
PID 2968 wrote to memory of 2272	2968	Umbral.exe	49
PID 2968 wrote to memory of 2272	2968	Umbral.exe	49
PID 2968 wrote to memory of 2272	2968	Umbral.exe	49
PID 2272 wrote to memory of 2256	2272	cmd.exe	51
PID 2272 wrote to memory of 2256	2272	cmd.exe	51
PID 2272 wrote to memory of 2256	2272	cmd.exe	51

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2356	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2356
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- 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:3024
- 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:2524
- 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:1296
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2184
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1936
- 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:308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1284
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2256

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
4f7255d09668512f5f9662ec37640cb5

SHA1
537dec1806be166705699e24f35d3c57daccd86e

SHA256
6360da0784b3c9f9ccc6a119f6e575ce5e4eae33d53a0c0a24f281ed62bc2e98

SHA512
73e97950cb1d3e0e07860c4556e75512f39e028800cea53f06ee5916c674086b89ca8d889e99f2eddf74ee2459e3883752bb80edc7302aa27958d469da004aa3

Download Submit
memory/308-50-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/2968-0-0x000007FEF5E63000-0x000007FEF5E64000-memory.dmp

Filesize
4KB

Download
memory/2968-1-0x00000000012E0000-0x0000000001320000-memory.dmp

Filesize
256KB

Download
memory/2968-2-0x000007FEF5E60000-0x000007FEF684C000-memory.dmp

Filesize
9.9MB

Download
memory/2968-54-0x000007FEF5E60000-0x000007FEF684C000-memory.dmp

Filesize
9.9MB

Download
memory/3000-13-0x000000000271B000-0x0000000002782000-memory.dmp

Filesize
412KB

Download
memory/3000-11-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/3000-12-0x0000000002714000-0x0000000002717000-memory.dmp

Filesize
12KB

Download
memory/3000-15-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/3000-10-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/3000-14-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/3000-9-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/3000-8-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/3000-7-0x000007FEEE51E000-0x000007FEEE51F000-memory.dmp

Filesize
4KB

Download
memory/3024-22-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/3024-21-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download