umbral | fd39268f5d2b701b75d72ee97b20c325b72af61aa69b9638e04ac2816927c483

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-01-2025 07:58

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General

Target

bootstrapper (1).exe
Size

328KB
MD5

0cf5a2a6a93219472f252664fa75255e
SHA1

38f94656d8c9be377161306d1b9ab5feb41f27ff
SHA256

fd39268f5d2b701b75d72ee97b20c325b72af61aa69b9638e04ac2816927c483
SHA512

6ab0c66dc057f557b33749ff493b579e284feda4541ca576fdf96ae5c8ea2611141abdc82bb8d423504c00dd5c3648209347d549511e889a66efc6af398c8911
SSDEEP

6144:SloZM+rIkd8g+EtXHkv/iD4CSn6HdmOhZU9va6v8Rb8e1mZi4c:8oZtL+EP8CSn6HdmOhZU9va6vs7

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2020-1-0x0000000000ED0000-0x0000000000F28000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2848	powershell.exe
2856	powershell.exe
1252	powershell.exe
2748	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	bootstrapper (1).exe

Deletes itself 1 IoCs

pid	Process
1872	cmd.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1872	cmd.exe
2556	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2208	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2556	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2020	bootstrapper (1).exe
2748	powershell.exe
2848	powershell.exe
2856	powershell.exe
3048	powershell.exe
1252	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	bootstrapper (1).exe
Token: SeIncreaseQuotaPrivilege	2912	wmic.exe
Token: SeSecurityPrivilege	2912	wmic.exe
Token: SeTakeOwnershipPrivilege	2912	wmic.exe
Token: SeLoadDriverPrivilege	2912	wmic.exe
Token: SeSystemProfilePrivilege	2912	wmic.exe
Token: SeSystemtimePrivilege	2912	wmic.exe
Token: SeProfSingleProcessPrivilege	2912	wmic.exe
Token: SeIncBasePriorityPrivilege	2912	wmic.exe
Token: SeCreatePagefilePrivilege	2912	wmic.exe
Token: SeBackupPrivilege	2912	wmic.exe
Token: SeRestorePrivilege	2912	wmic.exe
Token: SeShutdownPrivilege	2912	wmic.exe
Token: SeDebugPrivilege	2912	wmic.exe
Token: SeSystemEnvironmentPrivilege	2912	wmic.exe
Token: SeRemoteShutdownPrivilege	2912	wmic.exe
Token: SeUndockPrivilege	2912	wmic.exe
Token: SeManageVolumePrivilege	2912	wmic.exe
Token: 33	2912	wmic.exe
Token: 34	2912	wmic.exe
Token: 35	2912	wmic.exe
Token: SeIncreaseQuotaPrivilege	2912	wmic.exe
Token: SeSecurityPrivilege	2912	wmic.exe
Token: SeTakeOwnershipPrivilege	2912	wmic.exe
Token: SeLoadDriverPrivilege	2912	wmic.exe
Token: SeSystemProfilePrivilege	2912	wmic.exe
Token: SeSystemtimePrivilege	2912	wmic.exe
Token: SeProfSingleProcessPrivilege	2912	wmic.exe
Token: SeIncBasePriorityPrivilege	2912	wmic.exe
Token: SeCreatePagefilePrivilege	2912	wmic.exe
Token: SeBackupPrivilege	2912	wmic.exe
Token: SeRestorePrivilege	2912	wmic.exe
Token: SeShutdownPrivilege	2912	wmic.exe
Token: SeDebugPrivilege	2912	wmic.exe
Token: SeSystemEnvironmentPrivilege	2912	wmic.exe
Token: SeRemoteShutdownPrivilege	2912	wmic.exe
Token: SeUndockPrivilege	2912	wmic.exe
Token: SeManageVolumePrivilege	2912	wmic.exe
Token: 33	2912	wmic.exe
Token: 34	2912	wmic.exe
Token: 35	2912	wmic.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	2848	powershell.exe
Token: SeDebugPrivilege	2856	powershell.exe
Token: SeDebugPrivilege	3048	powershell.exe
Token: SeIncreaseQuotaPrivilege	1756	wmic.exe
Token: SeSecurityPrivilege	1756	wmic.exe
Token: SeTakeOwnershipPrivilege	1756	wmic.exe
Token: SeLoadDriverPrivilege	1756	wmic.exe
Token: SeSystemProfilePrivilege	1756	wmic.exe
Token: SeSystemtimePrivilege	1756	wmic.exe
Token: SeProfSingleProcessPrivilege	1756	wmic.exe
Token: SeIncBasePriorityPrivilege	1756	wmic.exe
Token: SeCreatePagefilePrivilege	1756	wmic.exe
Token: SeBackupPrivilege	1756	wmic.exe
Token: SeRestorePrivilege	1756	wmic.exe
Token: SeShutdownPrivilege	1756	wmic.exe
Token: SeDebugPrivilege	1756	wmic.exe
Token: SeSystemEnvironmentPrivilege	1756	wmic.exe
Token: SeRemoteShutdownPrivilege	1756	wmic.exe
Token: SeUndockPrivilege	1756	wmic.exe
Token: SeManageVolumePrivilege	1756	wmic.exe
Token: 33	1756	wmic.exe
Token: 34	1756	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 2912	2020	bootstrapper (1).exe	31
PID 2020 wrote to memory of 2912	2020	bootstrapper (1).exe	31
PID 2020 wrote to memory of 2912	2020	bootstrapper (1).exe	31
PID 2020 wrote to memory of 2824	2020	bootstrapper (1).exe	34
PID 2020 wrote to memory of 2824	2020	bootstrapper (1).exe	34
PID 2020 wrote to memory of 2824	2020	bootstrapper (1).exe	34
PID 2020 wrote to memory of 2748	2020	bootstrapper (1).exe	36
PID 2020 wrote to memory of 2748	2020	bootstrapper (1).exe	36
PID 2020 wrote to memory of 2748	2020	bootstrapper (1).exe	36
PID 2020 wrote to memory of 2848	2020	bootstrapper (1).exe	38
PID 2020 wrote to memory of 2848	2020	bootstrapper (1).exe	38
PID 2020 wrote to memory of 2848	2020	bootstrapper (1).exe	38
PID 2020 wrote to memory of 2856	2020	bootstrapper (1).exe	40
PID 2020 wrote to memory of 2856	2020	bootstrapper (1).exe	40
PID 2020 wrote to memory of 2856	2020	bootstrapper (1).exe	40
PID 2020 wrote to memory of 3048	2020	bootstrapper (1).exe	42
PID 2020 wrote to memory of 3048	2020	bootstrapper (1).exe	42
PID 2020 wrote to memory of 3048	2020	bootstrapper (1).exe	42
PID 2020 wrote to memory of 1756	2020	bootstrapper (1).exe	44
PID 2020 wrote to memory of 1756	2020	bootstrapper (1).exe	44
PID 2020 wrote to memory of 1756	2020	bootstrapper (1).exe	44
PID 2020 wrote to memory of 1684	2020	bootstrapper (1).exe	46
PID 2020 wrote to memory of 1684	2020	bootstrapper (1).exe	46
PID 2020 wrote to memory of 1684	2020	bootstrapper (1).exe	46
PID 2020 wrote to memory of 3020	2020	bootstrapper (1).exe	48
PID 2020 wrote to memory of 3020	2020	bootstrapper (1).exe	48
PID 2020 wrote to memory of 3020	2020	bootstrapper (1).exe	48
PID 2020 wrote to memory of 1252	2020	bootstrapper (1).exe	50
PID 2020 wrote to memory of 1252	2020	bootstrapper (1).exe	50
PID 2020 wrote to memory of 1252	2020	bootstrapper (1).exe	50
PID 2020 wrote to memory of 2208	2020	bootstrapper (1).exe	52
PID 2020 wrote to memory of 2208	2020	bootstrapper (1).exe	52
PID 2020 wrote to memory of 2208	2020	bootstrapper (1).exe	52
PID 2020 wrote to memory of 1872	2020	bootstrapper (1).exe	54
PID 2020 wrote to memory of 1872	2020	bootstrapper (1).exe	54
PID 2020 wrote to memory of 1872	2020	bootstrapper (1).exe	54
PID 1872 wrote to memory of 2556	1872	cmd.exe	56
PID 1872 wrote to memory of 2556	1872	cmd.exe	56
PID 1872 wrote to memory of 2556	1872	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2824	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe
"C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2912
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe"
  2⤵
  - Views/modifies file attributes
  PID:2824
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2748
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2848
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- 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:3048
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3020
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2208
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1872
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2556

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
083687adae5da0872c4d14fb4d751ebf

SHA1
33552c04ddc43c9610a183613d3c2e40c9cc738a

SHA256
be34095f1166608b6a32a29993005106ce078d8b0a30e948791131e4988dfcfa

SHA512
25c3861cb989a53c6932896bdb0ac51c8e8878c6a5a0ebc247a2dc5983a522bdc716ab3b7e4cfe4713e91044b872be187fe80aa88e79431c921f953556ae0711

Download Submit
memory/1252-43-0x00000000027F0000-0x00000000027F8000-memory.dmp

Filesize
32KB

Download
memory/2020-0-0x000007FEF55B3000-0x000007FEF55B4000-memory.dmp

Filesize
4KB

Download
memory/2020-1-0x0000000000ED0000-0x0000000000F28000-memory.dmp

Filesize
352KB

Download
memory/2020-2-0x000007FEF55B0000-0x000007FEF5F9C000-memory.dmp

Filesize
9.9MB

Download
memory/2020-47-0x000007FEF55B0000-0x000007FEF5F9C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-7-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/2748-8-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2848-14-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

Filesize
2.9MB

Download
memory/2848-15-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download