umbral | 587849a5a71af2928ecc82f0fa9f405b898e69d1c93e6d7102f29a38abf988eb

Analysis

max time kernel
93s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2025, 16:36

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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/1044-1-0x0000020CAA200000-0x0000020CAA240000-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
1420	powershell.exe
4840	powershell.exe
4212	powershell.exe
5008	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
54	discord.com
55	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
50	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1720	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1044	CrypticBootstrapper.exe
1420	powershell.exe
1420	powershell.exe
4212	powershell.exe
4212	powershell.exe
5008	powershell.exe
5008	powershell.exe
964	powershell.exe
964	powershell.exe
4840	powershell.exe
4840	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1044	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	640	wmic.exe
Token: SeSecurityPrivilege	640	wmic.exe
Token: SeTakeOwnershipPrivilege	640	wmic.exe
Token: SeLoadDriverPrivilege	640	wmic.exe
Token: SeSystemProfilePrivilege	640	wmic.exe
Token: SeSystemtimePrivilege	640	wmic.exe
Token: SeProfSingleProcessPrivilege	640	wmic.exe
Token: SeIncBasePriorityPrivilege	640	wmic.exe
Token: SeCreatePagefilePrivilege	640	wmic.exe
Token: SeBackupPrivilege	640	wmic.exe
Token: SeRestorePrivilege	640	wmic.exe
Token: SeShutdownPrivilege	640	wmic.exe
Token: SeDebugPrivilege	640	wmic.exe
Token: SeSystemEnvironmentPrivilege	640	wmic.exe
Token: SeRemoteShutdownPrivilege	640	wmic.exe
Token: SeUndockPrivilege	640	wmic.exe
Token: SeManageVolumePrivilege	640	wmic.exe
Token: 33	640	wmic.exe
Token: 34	640	wmic.exe
Token: 35	640	wmic.exe
Token: 36	640	wmic.exe
Token: SeIncreaseQuotaPrivilege	640	wmic.exe
Token: SeSecurityPrivilege	640	wmic.exe
Token: SeTakeOwnershipPrivilege	640	wmic.exe
Token: SeLoadDriverPrivilege	640	wmic.exe
Token: SeSystemProfilePrivilege	640	wmic.exe
Token: SeSystemtimePrivilege	640	wmic.exe
Token: SeProfSingleProcessPrivilege	640	wmic.exe
Token: SeIncBasePriorityPrivilege	640	wmic.exe
Token: SeCreatePagefilePrivilege	640	wmic.exe
Token: SeBackupPrivilege	640	wmic.exe
Token: SeRestorePrivilege	640	wmic.exe
Token: SeShutdownPrivilege	640	wmic.exe
Token: SeDebugPrivilege	640	wmic.exe
Token: SeSystemEnvironmentPrivilege	640	wmic.exe
Token: SeRemoteShutdownPrivilege	640	wmic.exe
Token: SeUndockPrivilege	640	wmic.exe
Token: SeManageVolumePrivilege	640	wmic.exe
Token: 33	640	wmic.exe
Token: 34	640	wmic.exe
Token: 35	640	wmic.exe
Token: 36	640	wmic.exe
Token: SeDebugPrivilege	1420	powershell.exe
Token: SeDebugPrivilege	4212	powershell.exe
Token: SeDebugPrivilege	5008	powershell.exe
Token: SeDebugPrivilege	964	powershell.exe
Token: SeIncreaseQuotaPrivilege	1588	wmic.exe
Token: SeSecurityPrivilege	1588	wmic.exe
Token: SeTakeOwnershipPrivilege	1588	wmic.exe
Token: SeLoadDriverPrivilege	1588	wmic.exe
Token: SeSystemProfilePrivilege	1588	wmic.exe
Token: SeSystemtimePrivilege	1588	wmic.exe
Token: SeProfSingleProcessPrivilege	1588	wmic.exe
Token: SeIncBasePriorityPrivilege	1588	wmic.exe
Token: SeCreatePagefilePrivilege	1588	wmic.exe
Token: SeBackupPrivilege	1588	wmic.exe
Token: SeRestorePrivilege	1588	wmic.exe
Token: SeShutdownPrivilege	1588	wmic.exe
Token: SeDebugPrivilege	1588	wmic.exe
Token: SeSystemEnvironmentPrivilege	1588	wmic.exe
Token: SeRemoteShutdownPrivilege	1588	wmic.exe
Token: SeUndockPrivilege	1588	wmic.exe
Token: SeManageVolumePrivilege	1588	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 640	1044	CrypticBootstrapper.exe	92
PID 1044 wrote to memory of 640	1044	CrypticBootstrapper.exe	92
PID 1044 wrote to memory of 1420	1044	CrypticBootstrapper.exe	94
PID 1044 wrote to memory of 1420	1044	CrypticBootstrapper.exe	94
PID 1044 wrote to memory of 4212	1044	CrypticBootstrapper.exe	96
PID 1044 wrote to memory of 4212	1044	CrypticBootstrapper.exe	96
PID 1044 wrote to memory of 5008	1044	CrypticBootstrapper.exe	98
PID 1044 wrote to memory of 5008	1044	CrypticBootstrapper.exe	98
PID 1044 wrote to memory of 964	1044	CrypticBootstrapper.exe	100
PID 1044 wrote to memory of 964	1044	CrypticBootstrapper.exe	100
PID 1044 wrote to memory of 1588	1044	CrypticBootstrapper.exe	102
PID 1044 wrote to memory of 1588	1044	CrypticBootstrapper.exe	102
PID 1044 wrote to memory of 1844	1044	CrypticBootstrapper.exe	104
PID 1044 wrote to memory of 1844	1044	CrypticBootstrapper.exe	104
PID 1044 wrote to memory of 4624	1044	CrypticBootstrapper.exe	106
PID 1044 wrote to memory of 4624	1044	CrypticBootstrapper.exe	106
PID 1044 wrote to memory of 4840	1044	CrypticBootstrapper.exe	108
PID 1044 wrote to memory of 4840	1044	CrypticBootstrapper.exe	108
PID 1044 wrote to memory of 1720	1044	CrypticBootstrapper.exe	110
PID 1044 wrote to memory of 1720	1044	CrypticBootstrapper.exe	110

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:1044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:640
- 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:1420
- 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:4212
- 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:5008
- 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:964
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1588
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4624
- 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:4840
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1720

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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
369b89e3801fb1c3df3a7527516edea6

SHA1
1dcf07320cbe1911d7138f4287b20e90e8f2bc25

SHA256
18b86f2340bc1547cc647693777444a0788551baee5989b0f8b186b8109f291c

SHA512
c819d002f42629c97a26f4e81c10a4c8a6b20a4bbfa269306675badaa7828740b80fe6c31945fc6f4c06ad812c1f04c6cc37ac62cb59ed9c0af22a819b259d87

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3zeye315.2u3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1044-0-0x00007FF82BE53000-0x00007FF82BE55000-memory.dmp

Filesize
8KB

Download
memory/1044-35-0x0000020CC49D0000-0x0000020CC4A20000-memory.dmp

Filesize
320KB

Download
memory/1044-94-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download
memory/1044-74-0x0000020CC4920000-0x0000020CC4932000-memory.dmp

Filesize
72KB

Download
memory/1044-2-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download
memory/1044-1-0x0000020CAA200000-0x0000020CAA240000-memory.dmp

Filesize
256KB

Download
memory/1044-34-0x0000020CC4950000-0x0000020CC49C6000-memory.dmp

Filesize
472KB

Download
memory/1044-73-0x0000020CC48F0000-0x0000020CC48FA000-memory.dmp

Filesize
40KB

Download
memory/1044-36-0x0000020CABFA0000-0x0000020CABFBE000-memory.dmp

Filesize
120KB

Download
memory/1044-3-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download
memory/1420-14-0x000002154FF80000-0x000002154FFA2000-memory.dmp

Filesize
136KB

Download
memory/1420-15-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download
memory/1420-19-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download
memory/1420-4-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download
memory/1420-16-0x00007FF82BE50000-0x00007FF82C911000-memory.dmp

Filesize
10.8MB

Download