umbral | 2c00e70fba3fc1ba12f7651d73a23c1294c684c507742c754f9460ecdcdf5fc6

Analysis

max time kernel
95s
max time network
127s
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 17:38

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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/3296-1-0x000001584C880000-0x000001584C8C0000-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
3796	powershell.exe
4208	powershell.exe
1184	powershell.exe
2448	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
25	discord.com
26	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3384	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3296	CrypticBootstrapper.exe
3796	powershell.exe
3796	powershell.exe
4208	powershell.exe
4208	powershell.exe
1184	powershell.exe
1184	powershell.exe
3860	powershell.exe
3860	powershell.exe
2448	powershell.exe
2448	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3296	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	4640	wmic.exe
Token: SeSecurityPrivilege	4640	wmic.exe
Token: SeTakeOwnershipPrivilege	4640	wmic.exe
Token: SeLoadDriverPrivilege	4640	wmic.exe
Token: SeSystemProfilePrivilege	4640	wmic.exe
Token: SeSystemtimePrivilege	4640	wmic.exe
Token: SeProfSingleProcessPrivilege	4640	wmic.exe
Token: SeIncBasePriorityPrivilege	4640	wmic.exe
Token: SeCreatePagefilePrivilege	4640	wmic.exe
Token: SeBackupPrivilege	4640	wmic.exe
Token: SeRestorePrivilege	4640	wmic.exe
Token: SeShutdownPrivilege	4640	wmic.exe
Token: SeDebugPrivilege	4640	wmic.exe
Token: SeSystemEnvironmentPrivilege	4640	wmic.exe
Token: SeRemoteShutdownPrivilege	4640	wmic.exe
Token: SeUndockPrivilege	4640	wmic.exe
Token: SeManageVolumePrivilege	4640	wmic.exe
Token: 33	4640	wmic.exe
Token: 34	4640	wmic.exe
Token: 35	4640	wmic.exe
Token: 36	4640	wmic.exe
Token: SeIncreaseQuotaPrivilege	4640	wmic.exe
Token: SeSecurityPrivilege	4640	wmic.exe
Token: SeTakeOwnershipPrivilege	4640	wmic.exe
Token: SeLoadDriverPrivilege	4640	wmic.exe
Token: SeSystemProfilePrivilege	4640	wmic.exe
Token: SeSystemtimePrivilege	4640	wmic.exe
Token: SeProfSingleProcessPrivilege	4640	wmic.exe
Token: SeIncBasePriorityPrivilege	4640	wmic.exe
Token: SeCreatePagefilePrivilege	4640	wmic.exe
Token: SeBackupPrivilege	4640	wmic.exe
Token: SeRestorePrivilege	4640	wmic.exe
Token: SeShutdownPrivilege	4640	wmic.exe
Token: SeDebugPrivilege	4640	wmic.exe
Token: SeSystemEnvironmentPrivilege	4640	wmic.exe
Token: SeRemoteShutdownPrivilege	4640	wmic.exe
Token: SeUndockPrivilege	4640	wmic.exe
Token: SeManageVolumePrivilege	4640	wmic.exe
Token: 33	4640	wmic.exe
Token: 34	4640	wmic.exe
Token: 35	4640	wmic.exe
Token: 36	4640	wmic.exe
Token: SeDebugPrivilege	3796	powershell.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeDebugPrivilege	1184	powershell.exe
Token: SeDebugPrivilege	3860	powershell.exe
Token: SeIncreaseQuotaPrivilege	4308	wmic.exe
Token: SeSecurityPrivilege	4308	wmic.exe
Token: SeTakeOwnershipPrivilege	4308	wmic.exe
Token: SeLoadDriverPrivilege	4308	wmic.exe
Token: SeSystemProfilePrivilege	4308	wmic.exe
Token: SeSystemtimePrivilege	4308	wmic.exe
Token: SeProfSingleProcessPrivilege	4308	wmic.exe
Token: SeIncBasePriorityPrivilege	4308	wmic.exe
Token: SeCreatePagefilePrivilege	4308	wmic.exe
Token: SeBackupPrivilege	4308	wmic.exe
Token: SeRestorePrivilege	4308	wmic.exe
Token: SeShutdownPrivilege	4308	wmic.exe
Token: SeDebugPrivilege	4308	wmic.exe
Token: SeSystemEnvironmentPrivilege	4308	wmic.exe
Token: SeRemoteShutdownPrivilege	4308	wmic.exe
Token: SeUndockPrivilege	4308	wmic.exe
Token: SeManageVolumePrivilege	4308	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3296 wrote to memory of 4640	3296	CrypticBootstrapper.exe	84
PID 3296 wrote to memory of 4640	3296	CrypticBootstrapper.exe	84
PID 3296 wrote to memory of 3796	3296	CrypticBootstrapper.exe	89
PID 3296 wrote to memory of 3796	3296	CrypticBootstrapper.exe	89
PID 3296 wrote to memory of 4208	3296	CrypticBootstrapper.exe	92
PID 3296 wrote to memory of 4208	3296	CrypticBootstrapper.exe	92
PID 3296 wrote to memory of 1184	3296	CrypticBootstrapper.exe	94
PID 3296 wrote to memory of 1184	3296	CrypticBootstrapper.exe	94
PID 3296 wrote to memory of 3860	3296	CrypticBootstrapper.exe	96
PID 3296 wrote to memory of 3860	3296	CrypticBootstrapper.exe	96
PID 3296 wrote to memory of 4308	3296	CrypticBootstrapper.exe	98
PID 3296 wrote to memory of 4308	3296	CrypticBootstrapper.exe	98
PID 3296 wrote to memory of 3656	3296	CrypticBootstrapper.exe	100
PID 3296 wrote to memory of 3656	3296	CrypticBootstrapper.exe	100
PID 3296 wrote to memory of 3972	3296	CrypticBootstrapper.exe	102
PID 3296 wrote to memory of 3972	3296	CrypticBootstrapper.exe	102
PID 3296 wrote to memory of 2448	3296	CrypticBootstrapper.exe	104
PID 3296 wrote to memory of 2448	3296	CrypticBootstrapper.exe	104
PID 3296 wrote to memory of 3384	3296	CrypticBootstrapper.exe	106
PID 3296 wrote to memory of 3384	3296	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:3296
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4640
- 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:3796
- 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:4208
- 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:1184
- 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:3860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3972
- 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:2448
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3384

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

Replay Monitor

Loading Replay Monitor...

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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
ec1ba4a995d866b282087b26a0539bbc

SHA1
c4aeae2bc3fa9a898680648b20102f01e8a811cf

SHA256
469da678c3c0364b1b511962cffd44cbfc10aab5c1c528c0c09fd952f08d8a2c

SHA512
07bf757ec9d0d368d3ef1bfc2b562895e2708757f8fefa04fa50beaa6fb38af1018ea0cfccf5666c5c8baa4c894deead9652c53e0608aa6a83ef5b396dba43e9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_15m01xee.lzw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3296-71-0x0000015866FA0000-0x0000015866FAA000-memory.dmp

Filesize
40KB

Download
memory/3296-35-0x0000015866CC0000-0x0000015866CDE000-memory.dmp

Filesize
120KB

Download
memory/3296-92-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download
memory/3296-88-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download
memory/3296-2-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download
memory/3296-33-0x0000015866FD0000-0x0000015867046000-memory.dmp

Filesize
472KB

Download
memory/3296-34-0x0000015866F50000-0x0000015866FA0000-memory.dmp

Filesize
320KB

Download
memory/3296-87-0x00007FFFF6ED3000-0x00007FFFF6ED5000-memory.dmp

Filesize
8KB

Download
memory/3296-1-0x000001584C880000-0x000001584C8C0000-memory.dmp

Filesize
256KB

Download
memory/3296-0-0x00007FFFF6ED3000-0x00007FFFF6ED5000-memory.dmp

Filesize
8KB

Download
memory/3296-72-0x0000015867050000-0x0000015867062000-memory.dmp

Filesize
72KB

Download
memory/3796-4-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download
memory/3796-12-0x00000248DC9C0000-0x00000248DC9E2000-memory.dmp

Filesize
136KB

Download
memory/3796-15-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download
memory/3796-3-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download
memory/3796-18-0x00007FFFF6ED0000-0x00007FFFF7991000-memory.dmp

Filesize
10.8MB

Download