umbral | 2c00e70fba3fc1ba12f7651d73a23c1294c684c507742c754f9460ecdcdf5fc6

Analysis

max time kernel
150s
max time network
151s
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, 16:45

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General

Target

CrypticBootstrapper.exe
Size

235KB
MD5

6ead93b6a9556b1fb06864131b2f5593
SHA1

fa1b1a247aa197036c94667e9f3c0ed8d79a22bc
SHA256

2c00e70fba3fc1ba12f7651d73a23c1294c684c507742c754f9460ecdcdf5fc6
SHA512

8a388cdcb275afd74b1f7320f8d0882847ae88a949924603022e7e7c6dd855f8004166119f7f3a9aff54ff83ce0264dd25d17338071e4137e6a25a5ce2764202
SSDEEP

6144:rloZMLrIkd8g+EtXHkv/iD4HbmedLocDXabtIExfHb8e1mILKpi:poZ0L+EP8HbmedLocDXabtIExrfKw

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1248-1-0x0000014184EB0000-0x0000014184EF0000-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
3044	powershell.exe
4912	powershell.exe
5064	powershell.exe
4996	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
20	discord.com
19	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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1664	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1248	CrypticBootstrapper.exe
3044	powershell.exe
3044	powershell.exe
4912	powershell.exe
4912	powershell.exe
5064	powershell.exe
5064	powershell.exe
1984	powershell.exe
1984	powershell.exe
4996	powershell.exe
4996	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe
Token: 35	2020	wmic.exe
Token: 36	2020	wmic.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe
Token: 35	2020	wmic.exe
Token: 36	2020	wmic.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeDebugPrivilege	4912	powershell.exe
Token: SeDebugPrivilege	5064	powershell.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeIncreaseQuotaPrivilege	2288	wmic.exe
Token: SeSecurityPrivilege	2288	wmic.exe
Token: SeTakeOwnershipPrivilege	2288	wmic.exe
Token: SeLoadDriverPrivilege	2288	wmic.exe
Token: SeSystemProfilePrivilege	2288	wmic.exe
Token: SeSystemtimePrivilege	2288	wmic.exe
Token: SeProfSingleProcessPrivilege	2288	wmic.exe
Token: SeIncBasePriorityPrivilege	2288	wmic.exe
Token: SeCreatePagefilePrivilege	2288	wmic.exe
Token: SeBackupPrivilege	2288	wmic.exe
Token: SeRestorePrivilege	2288	wmic.exe
Token: SeShutdownPrivilege	2288	wmic.exe
Token: SeDebugPrivilege	2288	wmic.exe
Token: SeSystemEnvironmentPrivilege	2288	wmic.exe
Token: SeRemoteShutdownPrivilege	2288	wmic.exe
Token: SeUndockPrivilege	2288	wmic.exe
Token: SeManageVolumePrivilege	2288	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1248 wrote to memory of 2020	1248	CrypticBootstrapper.exe	86
PID 1248 wrote to memory of 2020	1248	CrypticBootstrapper.exe	86
PID 1248 wrote to memory of 3044	1248	CrypticBootstrapper.exe	89
PID 1248 wrote to memory of 3044	1248	CrypticBootstrapper.exe	89
PID 1248 wrote to memory of 4912	1248	CrypticBootstrapper.exe	91
PID 1248 wrote to memory of 4912	1248	CrypticBootstrapper.exe	91
PID 1248 wrote to memory of 5064	1248	CrypticBootstrapper.exe	93
PID 1248 wrote to memory of 5064	1248	CrypticBootstrapper.exe	93
PID 1248 wrote to memory of 1984	1248	CrypticBootstrapper.exe	95
PID 1248 wrote to memory of 1984	1248	CrypticBootstrapper.exe	95
PID 1248 wrote to memory of 2288	1248	CrypticBootstrapper.exe	97
PID 1248 wrote to memory of 2288	1248	CrypticBootstrapper.exe	97
PID 1248 wrote to memory of 4772	1248	CrypticBootstrapper.exe	99
PID 1248 wrote to memory of 4772	1248	CrypticBootstrapper.exe	99
PID 1248 wrote to memory of 3456	1248	CrypticBootstrapper.exe	101
PID 1248 wrote to memory of 3456	1248	CrypticBootstrapper.exe	101
PID 1248 wrote to memory of 4996	1248	CrypticBootstrapper.exe	103
PID 1248 wrote to memory of 4996	1248	CrypticBootstrapper.exe	103
PID 1248 wrote to memory of 1664	1248	CrypticBootstrapper.exe	105
PID 1248 wrote to memory of 1664	1248	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:1248
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- 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:3044
- 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:4912
- 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:5064
- 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:1984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2288
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4772
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3456
- 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:4996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1664

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
17d8127be94d3c1b6fcc9a4ed585003e

SHA1
789874fcc7c778c723f3e89822d8cc8750c6c4c8

SHA256
ea357ad1f95863b3618d31e5b0f90495331f64de2b784d9e185b48668c937a7b

SHA512
bb18b6d07d82227f5cfbe3eb460df79ec892c560ad2964dcd4782aa26336ae15059843bf46a739bdd4a4daa58057f99102531a756a1cf434ce6449b3cd35a98e

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\__PSScriptPolicyTest_ah4biuhc.2m2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1248-71-0x0000014186C40000-0x0000014186C4A000-memory.dmp

Filesize
40KB

Download
memory/1248-35-0x000001419F600000-0x000001419F61E000-memory.dmp

Filesize
120KB

Download
memory/1248-90-0x00007FF8DB110000-0x00007FF8DBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/1248-72-0x000001419F6B0000-0x000001419F6C2000-memory.dmp

Filesize
72KB

Download
memory/1248-2-0x00007FF8DB110000-0x00007FF8DBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/1248-33-0x000001419F630000-0x000001419F6A6000-memory.dmp

Filesize
472KB

Download
memory/1248-34-0x000001419F5B0000-0x000001419F600000-memory.dmp

Filesize
320KB

Download
memory/1248-0-0x00007FF8DB113000-0x00007FF8DB115000-memory.dmp

Filesize
8KB

Download
memory/1248-1-0x0000014184EB0000-0x0000014184EF0000-memory.dmp

Filesize
256KB

Download
memory/3044-15-0x00007FF8DB110000-0x00007FF8DBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/3044-14-0x00007FF8DB110000-0x00007FF8DBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/3044-3-0x000001F5ADAD0000-0x000001F5ADAF2000-memory.dmp

Filesize
136KB

Download
memory/3044-13-0x00007FF8DB110000-0x00007FF8DBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/3044-18-0x00007FF8DB110000-0x00007FF8DBBD1000-memory.dmp

Filesize
10.8MB

Download