umbral | bd1077abb660d881bcd6d67997500ba2711898dd32c65d110d433876f42c7562

Analysis

max time kernel
139s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 01:08

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General

Target
celex/celex.exe
Size 232KB
Sample240507-bg8xvsbe7x
SHA256 9c6a028c15964ab83a35637a55e9738eec342d67f16c7c0d347b31f259e28629
MD5 c1e78a3d9c64ee73677e72545163c126
SHA1 28a33f173005ec78dc14c67d5b5761f4405243be
SHA512 a8e666fd43d72801db460ecced8ae5217442919b9b1b50b0efdaa5db1b3950dab5d20e6b6567d3463c0808b1b73d6bd40310a6e637a3b8de66b677bcb9ad01ad
SSDEEP 6144:rloZMLrIkd8g+EtXHkv/iD4ThFphv0IHg2PxM4dy+b8e1magci:poZ0L+EP8ThFphv0IHg2PxM4dpu1
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral4/memory/1984-1-0x0000021B80A10000-0x0000021B80A50000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2028	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	celex.exe

Reads user/profile data of web browsers 2 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

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
7	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2104	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1984	celex.exe
2028	powershell.exe
2028	powershell.exe
4544	powershell.exe
4544	powershell.exe
1212	powershell.exe
1212	powershell.exe
2480	powershell.exe
2480	powershell.exe
1708	powershell.exe
1708	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	celex.exe
Token: SeIncreaseQuotaPrivilege	3264	wmic.exe
Token: SeSecurityPrivilege	3264	wmic.exe
Token: SeTakeOwnershipPrivilege	3264	wmic.exe
Token: SeLoadDriverPrivilege	3264	wmic.exe
Token: SeSystemProfilePrivilege	3264	wmic.exe
Token: SeSystemtimePrivilege	3264	wmic.exe
Token: SeProfSingleProcessPrivilege	3264	wmic.exe
Token: SeIncBasePriorityPrivilege	3264	wmic.exe
Token: SeCreatePagefilePrivilege	3264	wmic.exe
Token: SeBackupPrivilege	3264	wmic.exe
Token: SeRestorePrivilege	3264	wmic.exe
Token: SeShutdownPrivilege	3264	wmic.exe
Token: SeDebugPrivilege	3264	wmic.exe
Token: SeSystemEnvironmentPrivilege	3264	wmic.exe
Token: SeRemoteShutdownPrivilege	3264	wmic.exe
Token: SeUndockPrivilege	3264	wmic.exe
Token: SeManageVolumePrivilege	3264	wmic.exe
Token: 33	3264	wmic.exe
Token: 34	3264	wmic.exe
Token: 35	3264	wmic.exe
Token: 36	3264	wmic.exe
Token: SeIncreaseQuotaPrivilege	3264	wmic.exe
Token: SeSecurityPrivilege	3264	wmic.exe
Token: SeTakeOwnershipPrivilege	3264	wmic.exe
Token: SeLoadDriverPrivilege	3264	wmic.exe
Token: SeSystemProfilePrivilege	3264	wmic.exe
Token: SeSystemtimePrivilege	3264	wmic.exe
Token: SeProfSingleProcessPrivilege	3264	wmic.exe
Token: SeIncBasePriorityPrivilege	3264	wmic.exe
Token: SeCreatePagefilePrivilege	3264	wmic.exe
Token: SeBackupPrivilege	3264	wmic.exe
Token: SeRestorePrivilege	3264	wmic.exe
Token: SeShutdownPrivilege	3264	wmic.exe
Token: SeDebugPrivilege	3264	wmic.exe
Token: SeSystemEnvironmentPrivilege	3264	wmic.exe
Token: SeRemoteShutdownPrivilege	3264	wmic.exe
Token: SeUndockPrivilege	3264	wmic.exe
Token: SeManageVolumePrivilege	3264	wmic.exe
Token: 33	3264	wmic.exe
Token: 34	3264	wmic.exe
Token: 35	3264	wmic.exe
Token: 36	3264	wmic.exe
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	4544	powershell.exe
Token: SeDebugPrivilege	1212	powershell.exe
Token: SeDebugPrivilege	2480	powershell.exe
Token: SeIncreaseQuotaPrivilege	4432	wmic.exe
Token: SeSecurityPrivilege	4432	wmic.exe
Token: SeTakeOwnershipPrivilege	4432	wmic.exe
Token: SeLoadDriverPrivilege	4432	wmic.exe
Token: SeSystemProfilePrivilege	4432	wmic.exe
Token: SeSystemtimePrivilege	4432	wmic.exe
Token: SeProfSingleProcessPrivilege	4432	wmic.exe
Token: SeIncBasePriorityPrivilege	4432	wmic.exe
Token: SeCreatePagefilePrivilege	4432	wmic.exe
Token: SeBackupPrivilege	4432	wmic.exe
Token: SeRestorePrivilege	4432	wmic.exe
Token: SeShutdownPrivilege	4432	wmic.exe
Token: SeDebugPrivilege	4432	wmic.exe
Token: SeSystemEnvironmentPrivilege	4432	wmic.exe
Token: SeRemoteShutdownPrivilege	4432	wmic.exe
Token: SeUndockPrivilege	4432	wmic.exe
Token: SeManageVolumePrivilege	4432	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 3264	1984	celex.exe	84
PID 1984 wrote to memory of 3264	1984	celex.exe	84
PID 1984 wrote to memory of 2028	1984	celex.exe	89
PID 1984 wrote to memory of 2028	1984	celex.exe	89
PID 1984 wrote to memory of 4544	1984	celex.exe	92
PID 1984 wrote to memory of 4544	1984	celex.exe	92
PID 1984 wrote to memory of 1212	1984	celex.exe	94
PID 1984 wrote to memory of 1212	1984	celex.exe	94
PID 1984 wrote to memory of 2480	1984	celex.exe	98
PID 1984 wrote to memory of 2480	1984	celex.exe	98
PID 1984 wrote to memory of 4432	1984	celex.exe	101
PID 1984 wrote to memory of 4432	1984	celex.exe	101
PID 1984 wrote to memory of 4688	1984	celex.exe	103
PID 1984 wrote to memory of 4688	1984	celex.exe	103
PID 1984 wrote to memory of 2256	1984	celex.exe	105
PID 1984 wrote to memory of 2256	1984	celex.exe	105
PID 1984 wrote to memory of 1708	1984	celex.exe	107
PID 1984 wrote to memory of 1708	1984	celex.exe	107
PID 1984 wrote to memory of 2104	1984	celex.exe	109
PID 1984 wrote to memory of 2104	1984	celex.exe	109

C:\Users\Admin\AppData\Local\Temp\celex\celex.exe
"C:\Users\Admin\AppData\Local\Temp\celex\celex.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3264
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\celex\celex.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2028
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4544
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1212
- 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:2480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4432
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2256
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2104

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

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 5552727ed38222e454bf700c88d5b1d16823e2ffb095ecb0aa8c1d73b897eab8
MD5 1d143d8f176947e4677211d4a25162e0
SHA1 8b595dccdc6dd126d7660cb074968b2e28ce7071
SHA512 bc4096fd0f70abdf9286f44fa97d8dfb8773506c9358d9967fcade44f4686e647b0c394792bdf1c2df6888e0d20ce2e053a435f543c125629afcc90cbe394497
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a
MD5 88be3bc8a7f90e3953298c0fdbec4d72
SHA1 f4969784ad421cc80ef45608727aacd0f6bf2e4b
SHA512 4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af
MD5 6317adf4fbc43ea2fd68861fafd57155
SHA1 6b87c718893c83c6eed2767e8d9cbc6443e31913
SHA512 17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_eg05oal4.zu0.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eg05oal4.zu0.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/1984-71-0x0000021B9AFF0000-0x0000021B9AFFA000-memory.dmp

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memory/1984-35-0x0000021B9AFD0000-0x0000021B9AFEE000-memory.dmp

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memory/1984-90-0x00007FFCA4F00000-0x00007FFCA59C1000-memory.dmp

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memory/1984-72-0x0000021B9B020000-0x0000021B9B032000-memory.dmp

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memory/1984-2-0x00007FFCA4F00000-0x00007FFCA59C1000-memory.dmp

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memory/1984-33-0x0000021B9B1D0000-0x0000021B9B246000-memory.dmp

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memory/1984-34-0x0000021B9B150000-0x0000021B9B1A0000-memory.dmp

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memory/1984-0-0x00007FFCA4F03000-0x00007FFCA4F05000-memory.dmp

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memory/1984-1-0x0000021B80A10000-0x0000021B80A50000-memory.dmp

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memory/2028-6-0x000002373F260000-0x000002373F282000-memory.dmp

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memory/2028-4-0x00007FFCA4F00000-0x00007FFCA59C1000-memory.dmp

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memory/2028-3-0x00007FFCA4F00000-0x00007FFCA59C1000-memory.dmp

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memory/2028-5-0x00007FFCA4F00000-0x00007FFCA59C1000-memory.dmp

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memory/2028-18-0x00007FFCA4F00000-0x00007FFCA59C1000-memory.dmp

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