umbral | 2c00e70fba3fc1ba12f7651d73a23c1294c684c507742c754f9460ecdcdf5fc6

Analysis

max time kernel
94s
max time network
149s
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 16:50

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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
behavioral2/memory/4380-1-0x00000220939E0000-0x0000022093A20000-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
3704	powershell.exe
3584	powershell.exe
3160	powershell.exe
4904	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
46	discord.com
47	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
42	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
228	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4380	CrypticBootstrapper.exe
3704	powershell.exe
3704	powershell.exe
3584	powershell.exe
3584	powershell.exe
3160	powershell.exe
3160	powershell.exe
1032	powershell.exe
1032	powershell.exe
4904	powershell.exe
4904	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4380	CrypticBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	32	wmic.exe
Token: SeSecurityPrivilege	32	wmic.exe
Token: SeTakeOwnershipPrivilege	32	wmic.exe
Token: SeLoadDriverPrivilege	32	wmic.exe
Token: SeSystemProfilePrivilege	32	wmic.exe
Token: SeSystemtimePrivilege	32	wmic.exe
Token: SeProfSingleProcessPrivilege	32	wmic.exe
Token: SeIncBasePriorityPrivilege	32	wmic.exe
Token: SeCreatePagefilePrivilege	32	wmic.exe
Token: SeBackupPrivilege	32	wmic.exe
Token: SeRestorePrivilege	32	wmic.exe
Token: SeShutdownPrivilege	32	wmic.exe
Token: SeDebugPrivilege	32	wmic.exe
Token: SeSystemEnvironmentPrivilege	32	wmic.exe
Token: SeRemoteShutdownPrivilege	32	wmic.exe
Token: SeUndockPrivilege	32	wmic.exe
Token: SeManageVolumePrivilege	32	wmic.exe
Token: 33	32	wmic.exe
Token: 34	32	wmic.exe
Token: 35	32	wmic.exe
Token: 36	32	wmic.exe
Token: SeIncreaseQuotaPrivilege	32	wmic.exe
Token: SeSecurityPrivilege	32	wmic.exe
Token: SeTakeOwnershipPrivilege	32	wmic.exe
Token: SeLoadDriverPrivilege	32	wmic.exe
Token: SeSystemProfilePrivilege	32	wmic.exe
Token: SeSystemtimePrivilege	32	wmic.exe
Token: SeProfSingleProcessPrivilege	32	wmic.exe
Token: SeIncBasePriorityPrivilege	32	wmic.exe
Token: SeCreatePagefilePrivilege	32	wmic.exe
Token: SeBackupPrivilege	32	wmic.exe
Token: SeRestorePrivilege	32	wmic.exe
Token: SeShutdownPrivilege	32	wmic.exe
Token: SeDebugPrivilege	32	wmic.exe
Token: SeSystemEnvironmentPrivilege	32	wmic.exe
Token: SeRemoteShutdownPrivilege	32	wmic.exe
Token: SeUndockPrivilege	32	wmic.exe
Token: SeManageVolumePrivilege	32	wmic.exe
Token: 33	32	wmic.exe
Token: 34	32	wmic.exe
Token: 35	32	wmic.exe
Token: 36	32	wmic.exe
Token: SeDebugPrivilege	3704	powershell.exe
Token: SeDebugPrivilege	3584	powershell.exe
Token: SeDebugPrivilege	3160	powershell.exe
Token: SeDebugPrivilege	1032	powershell.exe
Token: SeIncreaseQuotaPrivilege	3548	wmic.exe
Token: SeSecurityPrivilege	3548	wmic.exe
Token: SeTakeOwnershipPrivilege	3548	wmic.exe
Token: SeLoadDriverPrivilege	3548	wmic.exe
Token: SeSystemProfilePrivilege	3548	wmic.exe
Token: SeSystemtimePrivilege	3548	wmic.exe
Token: SeProfSingleProcessPrivilege	3548	wmic.exe
Token: SeIncBasePriorityPrivilege	3548	wmic.exe
Token: SeCreatePagefilePrivilege	3548	wmic.exe
Token: SeBackupPrivilege	3548	wmic.exe
Token: SeRestorePrivilege	3548	wmic.exe
Token: SeShutdownPrivilege	3548	wmic.exe
Token: SeDebugPrivilege	3548	wmic.exe
Token: SeSystemEnvironmentPrivilege	3548	wmic.exe
Token: SeRemoteShutdownPrivilege	3548	wmic.exe
Token: SeUndockPrivilege	3548	wmic.exe
Token: SeManageVolumePrivilege	3548	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 32	4380	CrypticBootstrapper.exe	91
PID 4380 wrote to memory of 32	4380	CrypticBootstrapper.exe	91
PID 4380 wrote to memory of 3704	4380	CrypticBootstrapper.exe	93
PID 4380 wrote to memory of 3704	4380	CrypticBootstrapper.exe	93
PID 4380 wrote to memory of 3584	4380	CrypticBootstrapper.exe	95
PID 4380 wrote to memory of 3584	4380	CrypticBootstrapper.exe	95
PID 4380 wrote to memory of 3160	4380	CrypticBootstrapper.exe	97
PID 4380 wrote to memory of 3160	4380	CrypticBootstrapper.exe	97
PID 4380 wrote to memory of 1032	4380	CrypticBootstrapper.exe	99
PID 4380 wrote to memory of 1032	4380	CrypticBootstrapper.exe	99
PID 4380 wrote to memory of 3548	4380	CrypticBootstrapper.exe	101
PID 4380 wrote to memory of 3548	4380	CrypticBootstrapper.exe	101
PID 4380 wrote to memory of 2684	4380	CrypticBootstrapper.exe	103
PID 4380 wrote to memory of 2684	4380	CrypticBootstrapper.exe	103
PID 4380 wrote to memory of 1712	4380	CrypticBootstrapper.exe	105
PID 4380 wrote to memory of 1712	4380	CrypticBootstrapper.exe	105
PID 4380 wrote to memory of 4904	4380	CrypticBootstrapper.exe	107
PID 4380 wrote to memory of 4904	4380	CrypticBootstrapper.exe	107
PID 4380 wrote to memory of 228	4380	CrypticBootstrapper.exe	109
PID 4380 wrote to memory of 228	4380	CrypticBootstrapper.exe	109

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:4380
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:32
- 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:3704
- 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:3584
- 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:3160
- 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:1032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3548
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1712
- 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:4904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:228

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
2730006cb9ada6e508ed0739867a7605

SHA1
b917dd5ba90e2d35e1a059b7ed69ff9d917be5e5

SHA256
dd17d7e9da0ba0ccdaaaf0477c145444f1edc3210980cfd50f6787441034a287

SHA512
3350168ca7e5e1ea51020ab79c4e586ce768e3abbaeb941755f9aec405da61fb224e37c4da933a708dd6950cb5b3f949d886d23cfc07ec770199ff008c658cf2

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

Filesize
1KB

MD5
fff254cb5c3afd42123a4696fea48838

SHA1
2522f8d37166c8202ed692a4f7e44464cb35fe11

SHA256
e27dc87caf719841f1cddfcbd53d9a49278f9da06b13b607799a07141a7adfec

SHA512
4cd8f4dd861947242ba2ff4eb4ac3b07f7afbf5c7b73ead1f3e3052c9976b6f0d5515f661f4dc4b487ecc99ff99a048767e38f925531ec2718fbf300c5d5f7d2

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

Filesize
1KB

MD5
79f6952813009f51247491052ca9ebbb

SHA1
78210dbe806bcde87a5f00201c9068bc1737a9ca

SHA256
bee2da5d5a697d09df4aa2b1c374a083a49b4f319c11da53c43ce9520b72a5dd

SHA512
cd019d3dc84665413a23cb2f4ed8fbe6bd6673928144d7af31e70d46dc24ce876bd5ffb11cb65fd5532f8f00bd793dd883200069b06dc93becf5d1db0399c22b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yudautz4.0ja.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3704-20-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/3704-5-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/3704-6-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/3704-17-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/3704-7-0x00000250F1D10000-0x00000250F1D32000-memory.dmp

Filesize
136KB

Download
memory/4380-35-0x00000220AE180000-0x00000220AE1F6000-memory.dmp

Filesize
472KB

Download
memory/4380-4-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/4380-0-0x00007FFC2E373000-0x00007FFC2E375000-memory.dmp

Filesize
8KB

Download
memory/4380-36-0x00000220AE200000-0x00000220AE250000-memory.dmp

Filesize
320KB

Download
memory/4380-37-0x0000022093FC0000-0x0000022093FDE000-memory.dmp

Filesize
120KB

Download
memory/4380-3-0x00007FFC2E373000-0x00007FFC2E375000-memory.dmp

Filesize
8KB

Download
memory/4380-2-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download
memory/4380-74-0x00000220958F0000-0x00000220958FA000-memory.dmp

Filesize
40KB

Download
memory/4380-75-0x00000220AE100000-0x00000220AE112000-memory.dmp

Filesize
72KB

Download
memory/4380-1-0x00000220939E0000-0x0000022093A20000-memory.dmp

Filesize
256KB

Download
memory/4380-95-0x00007FFC2E370000-0x00007FFC2EE31000-memory.dmp

Filesize
10.8MB

Download