umbral | 6068e700d44fbc4a38a0bb7b05262da684eb53ae6689fea9dfa5b1411f123922

Analysis

max time kernel
93s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
22-02-2025 20:35

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General

Target

BootstrapperNew.exe
Size

2.6MB
MD5

e50282436ad44eb8ec3e08ecaabec2e0
SHA1

1a7e345b90ec4087884185dbd0b40164248ecfd0
SHA256

6068e700d44fbc4a38a0bb7b05262da684eb53ae6689fea9dfa5b1411f123922
SHA512

e4027dac84e1fa9109426fdf8b52a86e5e1fbf66b64924d2cc132acf2dc4becfc6595076688fef6d0b27b40bc687c4883203524c81b0c01242d7743a713e9eaf
SSDEEP

49152:Exkczo+Et3EczvDrtkm3wmTwGyNqXhp3z182x0r8HQ4PhrYLg8hVYMz+PT:EE+YplNwGyNm3Z/x0wCX

Score

10^/10

umbral execution persistence spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1342855344006893599/eGKFdFfxqqBAzE_z6yEX9OgSrXGjaARgvdEHtEpFWiqqlvMfgcnXVTQiOS26Pz1o69fo

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0008000000023c3e-5.dat	family_umbral
behavioral1/memory/1440-8-0x00000240947B0000-0x00000240947F0000-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

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

execution

PowerShell

T1059.001

pid	Process
3076	powershell.exe
4164	powershell.exe
1536	powershell.exe
1264	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1440	B.exe
2716	BootstrapperNew.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	BootstrapperNew.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
27	discord.com
28	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
24	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1484	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3076	powershell.exe
3076	powershell.exe
4164	powershell.exe
4164	powershell.exe
1536	powershell.exe
1536	powershell.exe
2916	powershell.exe
2916	powershell.exe
1264	powershell.exe
1264	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1440	B.exe
Token: SeDebugPrivilege	3076	powershell.exe
Token: SeDebugPrivilege	4164	powershell.exe
Token: SeDebugPrivilege	1536	powershell.exe
Token: SeDebugPrivilege	2916	powershell.exe
Token: SeIncreaseQuotaPrivilege	4028	wmic.exe
Token: SeSecurityPrivilege	4028	wmic.exe
Token: SeTakeOwnershipPrivilege	4028	wmic.exe
Token: SeLoadDriverPrivilege	4028	wmic.exe
Token: SeSystemProfilePrivilege	4028	wmic.exe
Token: SeSystemtimePrivilege	4028	wmic.exe
Token: SeProfSingleProcessPrivilege	4028	wmic.exe
Token: SeIncBasePriorityPrivilege	4028	wmic.exe
Token: SeCreatePagefilePrivilege	4028	wmic.exe
Token: SeBackupPrivilege	4028	wmic.exe
Token: SeRestorePrivilege	4028	wmic.exe
Token: SeShutdownPrivilege	4028	wmic.exe
Token: SeDebugPrivilege	4028	wmic.exe
Token: SeSystemEnvironmentPrivilege	4028	wmic.exe
Token: SeRemoteShutdownPrivilege	4028	wmic.exe
Token: SeUndockPrivilege	4028	wmic.exe
Token: SeManageVolumePrivilege	4028	wmic.exe
Token: 33	4028	wmic.exe
Token: 34	4028	wmic.exe
Token: 35	4028	wmic.exe
Token: 36	4028	wmic.exe
Token: SeIncreaseQuotaPrivilege	4028	wmic.exe
Token: SeSecurityPrivilege	4028	wmic.exe
Token: SeTakeOwnershipPrivilege	4028	wmic.exe
Token: SeLoadDriverPrivilege	4028	wmic.exe
Token: SeSystemProfilePrivilege	4028	wmic.exe
Token: SeSystemtimePrivilege	4028	wmic.exe
Token: SeProfSingleProcessPrivilege	4028	wmic.exe
Token: SeIncBasePriorityPrivilege	4028	wmic.exe
Token: SeCreatePagefilePrivilege	4028	wmic.exe
Token: SeBackupPrivilege	4028	wmic.exe
Token: SeRestorePrivilege	4028	wmic.exe
Token: SeShutdownPrivilege	4028	wmic.exe
Token: SeDebugPrivilege	4028	wmic.exe
Token: SeSystemEnvironmentPrivilege	4028	wmic.exe
Token: SeRemoteShutdownPrivilege	4028	wmic.exe
Token: SeUndockPrivilege	4028	wmic.exe
Token: SeManageVolumePrivilege	4028	wmic.exe
Token: 33	4028	wmic.exe
Token: 34	4028	wmic.exe
Token: 35	4028	wmic.exe
Token: 36	4028	wmic.exe
Token: SeIncreaseQuotaPrivilege	4408	wmic.exe
Token: SeSecurityPrivilege	4408	wmic.exe
Token: SeTakeOwnershipPrivilege	4408	wmic.exe
Token: SeLoadDriverPrivilege	4408	wmic.exe
Token: SeSystemProfilePrivilege	4408	wmic.exe
Token: SeSystemtimePrivilege	4408	wmic.exe
Token: SeProfSingleProcessPrivilege	4408	wmic.exe
Token: SeIncBasePriorityPrivilege	4408	wmic.exe
Token: SeCreatePagefilePrivilege	4408	wmic.exe
Token: SeBackupPrivilege	4408	wmic.exe
Token: SeRestorePrivilege	4408	wmic.exe
Token: SeShutdownPrivilege	4408	wmic.exe
Token: SeDebugPrivilege	4408	wmic.exe
Token: SeSystemEnvironmentPrivilege	4408	wmic.exe
Token: SeRemoteShutdownPrivilege	4408	wmic.exe
Token: SeUndockPrivilege	4408	wmic.exe
Token: SeManageVolumePrivilege	4408	wmic.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4604 wrote to memory of 1440	4604	BootstrapperNew.exe	83
PID 4604 wrote to memory of 1440	4604	BootstrapperNew.exe	83
PID 1440 wrote to memory of 3076	1440	B.exe	86
PID 1440 wrote to memory of 3076	1440	B.exe	86
PID 1440 wrote to memory of 4164	1440	B.exe	91
PID 1440 wrote to memory of 4164	1440	B.exe	91
PID 1440 wrote to memory of 1536	1440	B.exe	93
PID 1440 wrote to memory of 1536	1440	B.exe	93
PID 1440 wrote to memory of 2916	1440	B.exe	95
PID 1440 wrote to memory of 2916	1440	B.exe	95
PID 1440 wrote to memory of 4028	1440	B.exe	98
PID 1440 wrote to memory of 4028	1440	B.exe	98
PID 1440 wrote to memory of 4408	1440	B.exe	101
PID 1440 wrote to memory of 4408	1440	B.exe	101
PID 1440 wrote to memory of 3112	1440	B.exe	103
PID 1440 wrote to memory of 3112	1440	B.exe	103
PID 1440 wrote to memory of 1264	1440	B.exe	105
PID 1440 wrote to memory of 1264	1440	B.exe	105
PID 1440 wrote to memory of 1484	1440	B.exe	107
PID 1440 wrote to memory of 1484	1440	B.exe	107
PID 4604 wrote to memory of 2716	4604	BootstrapperNew.exe	109
PID 4604 wrote to memory of 2716	4604	BootstrapperNew.exe	109

C:\Users\Admin\AppData\Local\Temp\BootstrapperNew.exe
"C:\Users\Admin\AppData\Local\Temp\BootstrapperNew.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4604
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\B.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\B.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1440
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\B.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3076
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4164
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1536
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2916
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4028
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4408
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3112
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:1264
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:1484
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\BootstrapperNew.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\BootstrapperNew.exe
  2⤵
  - Executes dropped EXE
  PID:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\B.exe

Filesize
230KB

MD5
1384437499ef26b3d89ae8def526c7a9

SHA1
39cae99bf1983d4aa43f709388067047b1cb5375

SHA256
30c6e33635521550da901133fe09d424e420d3049982626590123f98dc67f45d

SHA512
5d5baf8238809a4b06ac07c2cc51320d405665e21e3255495f6efcffd354772fdc4e04924bd35aa72576126dd691b482e1e098166586ad457e62e34ec3ad91bc

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\BootstrapperNew.exe

Filesize
2.9MB

MD5
f227cdfd423b3cc03bb69c49babf4da3

SHA1
3db5a97d9b0f2545e7ba97026af6c28512200441

SHA256
cb5d6c1ca0aa6232a2d55e14b20ac4a9945a0bd063c57d60a5ed3ae94160e3e8

SHA512
b10afd03b02a928545c16fad39a6ae46b68b1e1a2477a6990803ce80008e7161fb2ebc9380ba15a1b074bb436aa34bcd6c94a922933d438b1c22489717e1e10e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gnlzginh.icv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1440-100-0x00007FFB03460000-0x00007FFB03F21000-memory.dmp

Filesize
10.8MB

Download
memory/1440-80-0x00000240AEE00000-0x00000240AEE12000-memory.dmp

Filesize
72KB

Download
memory/1440-79-0x0000024096430000-0x000002409643A000-memory.dmp

Filesize
40KB

Download
memory/1440-9-0x00007FFB03460000-0x00007FFB03F21000-memory.dmp

Filesize
10.8MB

Download
memory/1440-40-0x00000240AEFD0000-0x00000240AF046000-memory.dmp

Filesize
472KB

Download
memory/1440-41-0x0000024096470000-0x00000240964C0000-memory.dmp

Filesize
320KB

Download
memory/1440-42-0x0000024096440000-0x000002409645E000-memory.dmp

Filesize
120KB

Download
memory/1440-8-0x00000240947B0000-0x00000240947F0000-memory.dmp

Filesize
256KB

Download
memory/1440-7-0x00007FFB03463000-0x00007FFB03465000-memory.dmp

Filesize
8KB

Download
memory/2716-106-0x0000028CD3400000-0x0000028CD3408000-memory.dmp

Filesize
32KB

Download
memory/2716-107-0x0000028CD3480000-0x0000028CD34B8000-memory.dmp

Filesize
224KB

Download
memory/2716-116-0x0000028CD4440000-0x0000028CD4448000-memory.dmp

Filesize
32KB

Download
memory/2716-115-0x0000028CD3470000-0x0000028CD347A000-memory.dmp

Filesize
40KB

Download
memory/2716-114-0x0000028CD34F0000-0x0000028CD34FA000-memory.dmp

Filesize
40KB

Download
memory/2716-104-0x0000028CB4A60000-0x0000028CB4D42000-memory.dmp

Filesize
2.9MB

Download
memory/2716-105-0x0000028CB5150000-0x0000028CB5160000-memory.dmp

Filesize
64KB

Download
memory/2716-113-0x0000028CD4410000-0x0000028CD4426000-memory.dmp

Filesize
88KB

Download
memory/2716-108-0x0000028CD3450000-0x0000028CD345E000-memory.dmp

Filesize
56KB

Download
memory/2716-112-0x0000028CD3500000-0x0000028CD3508000-memory.dmp

Filesize
32KB

Download
memory/2716-109-0x0000028CD4310000-0x0000028CD4410000-memory.dmp

Filesize
1024KB

Download
memory/2716-110-0x0000028CD3460000-0x0000028CD346A000-memory.dmp

Filesize
40KB

Download
memory/2716-111-0x0000028CD34C0000-0x0000028CD34E6000-memory.dmp

Filesize
152KB

Download
memory/3076-25-0x00007FFB03460000-0x00007FFB03F21000-memory.dmp

Filesize
10.8MB

Download
memory/3076-15-0x0000024CC9A50000-0x0000024CC9A72000-memory.dmp

Filesize
136KB

Download
memory/3076-20-0x00007FFB03460000-0x00007FFB03F21000-memory.dmp

Filesize
10.8MB

Download
memory/3076-21-0x00007FFB03460000-0x00007FFB03F21000-memory.dmp

Filesize
10.8MB

Download
memory/3076-22-0x00007FFB03460000-0x00007FFB03F21000-memory.dmp

Filesize
10.8MB

Download