umbral | 587849a5a71af2928ecc82f0fa9f405b898e69d1c93e6d7102f29a38abf988eb

Analysis

max time kernel
94s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
03-02-2025 14:23

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General

Target

CrypticBootstrapper.exe
Size

234KB
MD5

382b946582beaad5ee5c50ac21d0ded1
SHA1

26ab22955ed978b232503e710a226c8f9332c835
SHA256

587849a5a71af2928ecc82f0fa9f405b898e69d1c93e6d7102f29a38abf988eb
SHA512

bab1487bfd8f10753a4022336c026fb3e8f77cae371d0a8c861c36c4e1c101c999b4ec46dac55f01439d74441e86fdb30ae9dfb7bf6fd60b3c12f5f9103e0c80
SSDEEP

6144:zloZMLrIkd8g+EtXHkv/iD4xI/s48e1mF0i:xoZ0L+EP8xgO9

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2460-1-0x0000025F91640000-0x0000025F91680000-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
3884	powershell.exe
4440	powershell.exe
4064	powershell.exe
4344	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	CrypticBootstrapper.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
29	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
7	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5056	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2460	CrypticBootstrapper.exe
3884	powershell.exe
3884	powershell.exe
4440	powershell.exe
4440	powershell.exe
4064	powershell.exe
4064	powershell.exe
4488	powershell.exe
4488	powershell.exe
4344	powershell.exe
4344	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2460	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	5076	wmic.exe
Token: SeSecurityPrivilege	5076	wmic.exe
Token: SeTakeOwnershipPrivilege	5076	wmic.exe
Token: SeLoadDriverPrivilege	5076	wmic.exe
Token: SeSystemProfilePrivilege	5076	wmic.exe
Token: SeSystemtimePrivilege	5076	wmic.exe
Token: SeProfSingleProcessPrivilege	5076	wmic.exe
Token: SeIncBasePriorityPrivilege	5076	wmic.exe
Token: SeCreatePagefilePrivilege	5076	wmic.exe
Token: SeBackupPrivilege	5076	wmic.exe
Token: SeRestorePrivilege	5076	wmic.exe
Token: SeShutdownPrivilege	5076	wmic.exe
Token: SeDebugPrivilege	5076	wmic.exe
Token: SeSystemEnvironmentPrivilege	5076	wmic.exe
Token: SeRemoteShutdownPrivilege	5076	wmic.exe
Token: SeUndockPrivilege	5076	wmic.exe
Token: SeManageVolumePrivilege	5076	wmic.exe
Token: 33	5076	wmic.exe
Token: 34	5076	wmic.exe
Token: 35	5076	wmic.exe
Token: 36	5076	wmic.exe
Token: SeIncreaseQuotaPrivilege	5076	wmic.exe
Token: SeSecurityPrivilege	5076	wmic.exe
Token: SeTakeOwnershipPrivilege	5076	wmic.exe
Token: SeLoadDriverPrivilege	5076	wmic.exe
Token: SeSystemProfilePrivilege	5076	wmic.exe
Token: SeSystemtimePrivilege	5076	wmic.exe
Token: SeProfSingleProcessPrivilege	5076	wmic.exe
Token: SeIncBasePriorityPrivilege	5076	wmic.exe
Token: SeCreatePagefilePrivilege	5076	wmic.exe
Token: SeBackupPrivilege	5076	wmic.exe
Token: SeRestorePrivilege	5076	wmic.exe
Token: SeShutdownPrivilege	5076	wmic.exe
Token: SeDebugPrivilege	5076	wmic.exe
Token: SeSystemEnvironmentPrivilege	5076	wmic.exe
Token: SeRemoteShutdownPrivilege	5076	wmic.exe
Token: SeUndockPrivilege	5076	wmic.exe
Token: SeManageVolumePrivilege	5076	wmic.exe
Token: 33	5076	wmic.exe
Token: 34	5076	wmic.exe
Token: 35	5076	wmic.exe
Token: 36	5076	wmic.exe
Token: SeDebugPrivilege	3884	powershell.exe
Token: SeDebugPrivilege	4440	powershell.exe
Token: SeDebugPrivilege	4064	powershell.exe
Token: SeDebugPrivilege	4488	powershell.exe
Token: SeIncreaseQuotaPrivilege	952	wmic.exe
Token: SeSecurityPrivilege	952	wmic.exe
Token: SeTakeOwnershipPrivilege	952	wmic.exe
Token: SeLoadDriverPrivilege	952	wmic.exe
Token: SeSystemProfilePrivilege	952	wmic.exe
Token: SeSystemtimePrivilege	952	wmic.exe
Token: SeProfSingleProcessPrivilege	952	wmic.exe
Token: SeIncBasePriorityPrivilege	952	wmic.exe
Token: SeCreatePagefilePrivilege	952	wmic.exe
Token: SeBackupPrivilege	952	wmic.exe
Token: SeRestorePrivilege	952	wmic.exe
Token: SeShutdownPrivilege	952	wmic.exe
Token: SeDebugPrivilege	952	wmic.exe
Token: SeSystemEnvironmentPrivilege	952	wmic.exe
Token: SeRemoteShutdownPrivilege	952	wmic.exe
Token: SeUndockPrivilege	952	wmic.exe
Token: SeManageVolumePrivilege	952	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 5076	2460	CrypticBootstrapper.exe	84
PID 2460 wrote to memory of 5076	2460	CrypticBootstrapper.exe	84
PID 2460 wrote to memory of 3884	2460	CrypticBootstrapper.exe	89
PID 2460 wrote to memory of 3884	2460	CrypticBootstrapper.exe	89
PID 2460 wrote to memory of 4440	2460	CrypticBootstrapper.exe	92
PID 2460 wrote to memory of 4440	2460	CrypticBootstrapper.exe	92
PID 2460 wrote to memory of 4064	2460	CrypticBootstrapper.exe	95
PID 2460 wrote to memory of 4064	2460	CrypticBootstrapper.exe	95
PID 2460 wrote to memory of 4488	2460	CrypticBootstrapper.exe	97
PID 2460 wrote to memory of 4488	2460	CrypticBootstrapper.exe	97
PID 2460 wrote to memory of 952	2460	CrypticBootstrapper.exe	99
PID 2460 wrote to memory of 952	2460	CrypticBootstrapper.exe	99
PID 2460 wrote to memory of 2676	2460	CrypticBootstrapper.exe	101
PID 2460 wrote to memory of 2676	2460	CrypticBootstrapper.exe	101
PID 2460 wrote to memory of 3552	2460	CrypticBootstrapper.exe	104
PID 2460 wrote to memory of 3552	2460	CrypticBootstrapper.exe	104
PID 2460 wrote to memory of 4344	2460	CrypticBootstrapper.exe	106
PID 2460 wrote to memory of 4344	2460	CrypticBootstrapper.exe	106
PID 2460 wrote to memory of 5056	2460	CrypticBootstrapper.exe	108
PID 2460 wrote to memory of 5056	2460	CrypticBootstrapper.exe	108

C:\Users\Admin\AppData\Local\Temp\CrypticBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\CrypticBootstrapper.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5076
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\CrypticBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3884
- 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:4440
- 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:4064
- 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:4488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:952
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3552
- 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:4344
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5056

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

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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

Filesize
1KB

MD5
64d127cc44e4f80a59e02e68193c4bc3

SHA1
14cb6a2e21a342bd966613992857710afc6c0d5f

SHA256
54cad47e03096be3c64b6f9ab0346572687c24da176d1b4d083222cd4fc0413b

SHA512
cc64931f9d69ca399b233627737aa6ca0f623d55dea55a05f9eb5e9a62c0ee7899e5a682c208f58e8699f276659f4944cc2603a057980d0a02b1260c80a6f1c0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eguclxhu.5un.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2460-71-0x0000025F932F0000-0x0000025F932FA000-memory.dmp

Filesize
40KB

Download
memory/2460-35-0x0000025F932A0000-0x0000025F932BE000-memory.dmp

Filesize
120KB

Download
memory/2460-90-0x00007FFA4CD80000-0x00007FFA4D841000-memory.dmp

Filesize
10.8MB

Download
memory/2460-72-0x0000025FABF70000-0x0000025FABF82000-memory.dmp

Filesize
72KB

Download
memory/2460-2-0x00007FFA4CD80000-0x00007FFA4D841000-memory.dmp

Filesize
10.8MB

Download
memory/2460-33-0x0000025FABDF0000-0x0000025FABE66000-memory.dmp

Filesize
472KB

Download
memory/2460-34-0x0000025FABD70000-0x0000025FABDC0000-memory.dmp

Filesize
320KB

Download
memory/2460-0-0x00007FFA4CD83000-0x00007FFA4CD85000-memory.dmp

Filesize
8KB

Download
memory/2460-1-0x0000025F91640000-0x0000025F91680000-memory.dmp

Filesize
256KB

Download
memory/3884-15-0x00007FFA4CD80000-0x00007FFA4D841000-memory.dmp

Filesize
10.8MB

Download
memory/3884-14-0x0000024D70200000-0x0000024D70222000-memory.dmp

Filesize
136KB

Download
memory/3884-9-0x00007FFA4CD80000-0x00007FFA4D841000-memory.dmp

Filesize
10.8MB

Download
memory/3884-13-0x00007FFA4CD80000-0x00007FFA4D841000-memory.dmp

Filesize
10.8MB

Download
memory/3884-18-0x00007FFA4CD80000-0x00007FFA4D841000-memory.dmp

Filesize
10.8MB

Download