umbral | 2133a2c5f4a04d8ffe1ea436d035917ad16c50fa011b021c95c71f2660e67033

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
03-08-2024 11:04

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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/2152-1-0x0000000000870000-0x00000000008B0000-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
2908	powershell.exe
1804	powershell.exe
2688	powershell.exe
1092	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
1048	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
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
344	PING.EXE
1048	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1960	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
344	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2152	BootstrapperV1.11.exe
2908	powershell.exe
1804	powershell.exe
2688	powershell.exe
1184	powershell.exe
1092	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2152	BootstrapperV1.11.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
Token: 35	1756	wmic.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
Token: 35	1756	wmic.exe
Token: SeDebugPrivilege	2908	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	1184	powershell.exe
Token: SeIncreaseQuotaPrivilege	2240	wmic.exe
Token: SeSecurityPrivilege	2240	wmic.exe
Token: SeTakeOwnershipPrivilege	2240	wmic.exe
Token: SeLoadDriverPrivilege	2240	wmic.exe
Token: SeSystemProfilePrivilege	2240	wmic.exe
Token: SeSystemtimePrivilege	2240	wmic.exe
Token: SeProfSingleProcessPrivilege	2240	wmic.exe
Token: SeIncBasePriorityPrivilege	2240	wmic.exe
Token: SeCreatePagefilePrivilege	2240	wmic.exe
Token: SeBackupPrivilege	2240	wmic.exe
Token: SeRestorePrivilege	2240	wmic.exe
Token: SeShutdownPrivilege	2240	wmic.exe
Token: SeDebugPrivilege	2240	wmic.exe
Token: SeSystemEnvironmentPrivilege	2240	wmic.exe
Token: SeRemoteShutdownPrivilege	2240	wmic.exe
Token: SeUndockPrivilege	2240	wmic.exe
Token: SeManageVolumePrivilege	2240	wmic.exe
Token: 33	2240	wmic.exe
Token: 34	2240	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 1756	2152	BootstrapperV1.11.exe	28
PID 2152 wrote to memory of 1756	2152	BootstrapperV1.11.exe	28
PID 2152 wrote to memory of 1756	2152	BootstrapperV1.11.exe	28
PID 2152 wrote to memory of 1992	2152	BootstrapperV1.11.exe	31
PID 2152 wrote to memory of 1992	2152	BootstrapperV1.11.exe	31
PID 2152 wrote to memory of 1992	2152	BootstrapperV1.11.exe	31
PID 2152 wrote to memory of 2908	2152	BootstrapperV1.11.exe	33
PID 2152 wrote to memory of 2908	2152	BootstrapperV1.11.exe	33
PID 2152 wrote to memory of 2908	2152	BootstrapperV1.11.exe	33
PID 2152 wrote to memory of 1804	2152	BootstrapperV1.11.exe	35
PID 2152 wrote to memory of 1804	2152	BootstrapperV1.11.exe	35
PID 2152 wrote to memory of 1804	2152	BootstrapperV1.11.exe	35
PID 2152 wrote to memory of 2688	2152	BootstrapperV1.11.exe	37
PID 2152 wrote to memory of 2688	2152	BootstrapperV1.11.exe	37
PID 2152 wrote to memory of 2688	2152	BootstrapperV1.11.exe	37
PID 2152 wrote to memory of 1184	2152	BootstrapperV1.11.exe	39
PID 2152 wrote to memory of 1184	2152	BootstrapperV1.11.exe	39
PID 2152 wrote to memory of 1184	2152	BootstrapperV1.11.exe	39
PID 2152 wrote to memory of 2240	2152	BootstrapperV1.11.exe	41
PID 2152 wrote to memory of 2240	2152	BootstrapperV1.11.exe	41
PID 2152 wrote to memory of 2240	2152	BootstrapperV1.11.exe	41
PID 2152 wrote to memory of 2028	2152	BootstrapperV1.11.exe	43
PID 2152 wrote to memory of 2028	2152	BootstrapperV1.11.exe	43
PID 2152 wrote to memory of 2028	2152	BootstrapperV1.11.exe	43
PID 2152 wrote to memory of 1924	2152	BootstrapperV1.11.exe	45
PID 2152 wrote to memory of 1924	2152	BootstrapperV1.11.exe	45
PID 2152 wrote to memory of 1924	2152	BootstrapperV1.11.exe	45
PID 2152 wrote to memory of 1092	2152	BootstrapperV1.11.exe	47
PID 2152 wrote to memory of 1092	2152	BootstrapperV1.11.exe	47
PID 2152 wrote to memory of 1092	2152	BootstrapperV1.11.exe	47
PID 2152 wrote to memory of 1960	2152	BootstrapperV1.11.exe	49
PID 2152 wrote to memory of 1960	2152	BootstrapperV1.11.exe	49
PID 2152 wrote to memory of 1960	2152	BootstrapperV1.11.exe	49
PID 2152 wrote to memory of 1048	2152	BootstrapperV1.11.exe	51
PID 2152 wrote to memory of 1048	2152	BootstrapperV1.11.exe	51
PID 2152 wrote to memory of 1048	2152	BootstrapperV1.11.exe	51
PID 1048 wrote to memory of 344	1048	cmd.exe	53
PID 1048 wrote to memory of 344	1048	cmd.exe	53
PID 1048 wrote to memory of 344	1048	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1992	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:2152
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1756
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe"
  2⤵
  - Views/modifies file attributes
  PID:1992
- 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:2908
- 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:1804
- 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:2688
- 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:1184
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2240
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1924
- 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:1092
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1960
- 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:1048
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:344

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2816

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
9cb2ae5440c90b13b9cc3c4585394e62

SHA1
b7835c83ee0fb2ff1f68009d30a9ccc05fc43b22

SHA256
d8ec5e4c46539a5bb97868f0f74a2f4ba393b01620c9a5a47a8b532a9b3bd8ea

SHA512
38a96e300824562b8cceb7f10819139081d1b7c70c5f450b99aeea213faac9a387e9eef86184ba4cf24056d93934e427a4bc516b968a5592eb4d10aa7a5a4b43

Download Submit
memory/1092-43-0x0000000002000000-0x0000000002008000-memory.dmp

Filesize
32KB

Download
memory/1804-14-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/1804-15-0x0000000001C20000-0x0000000001C28000-memory.dmp

Filesize
32KB

Download
memory/2152-0-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

Filesize
4KB

Download
memory/2152-1-0x0000000000870000-0x00000000008B0000-memory.dmp

Filesize
256KB

Download
memory/2152-2-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

Filesize
9.9MB

Download
memory/2152-47-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

Filesize
9.9MB

Download
memory/2908-7-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/2908-8-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download