umbral | 5c37ed0542974bf478e1e6ff614395e6110bfc4726494e72f76b62e014bda0ff

Analysis

max time kernel
122s
max time network
128s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
23-08-2024 15:32

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General

Target

drivers.exe
Size

229KB
MD5

8275af467a6e5859869a13eabc03cc15
SHA1

e70d0630ff34f6a1c72ab4343dc01c6dd4c53bc1
SHA256

5c37ed0542974bf478e1e6ff614395e6110bfc4726494e72f76b62e014bda0ff
SHA512

87497047b564694a15193d6b5e7d13fbfbbeeec2f14993c09a79b52fa9781ede36136d1c688d264ccd2c45ea93d5f372c210ae54066de02e3abf7d15428d4e6a
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4yEay5nsAv4OXZkQlpAb8e1mGi:noZ0L+EP8yEay5nsAv4OXZkQlu4

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2072-1-0x0000000000C70000-0x0000000000CB0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
2892	powershell.exe
2664	powershell.exe
1944	powershell.exe
2624	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	drivers.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
10	discord.com
9	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
6	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1224	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2072	drivers.exe
2892	powershell.exe
2664	powershell.exe
1944	powershell.exe
1732	powershell.exe
2624	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	drivers.exe
Token: SeIncreaseQuotaPrivilege	2636	wmic.exe
Token: SeSecurityPrivilege	2636	wmic.exe
Token: SeTakeOwnershipPrivilege	2636	wmic.exe
Token: SeLoadDriverPrivilege	2636	wmic.exe
Token: SeSystemProfilePrivilege	2636	wmic.exe
Token: SeSystemtimePrivilege	2636	wmic.exe
Token: SeProfSingleProcessPrivilege	2636	wmic.exe
Token: SeIncBasePriorityPrivilege	2636	wmic.exe
Token: SeCreatePagefilePrivilege	2636	wmic.exe
Token: SeBackupPrivilege	2636	wmic.exe
Token: SeRestorePrivilege	2636	wmic.exe
Token: SeShutdownPrivilege	2636	wmic.exe
Token: SeDebugPrivilege	2636	wmic.exe
Token: SeSystemEnvironmentPrivilege	2636	wmic.exe
Token: SeRemoteShutdownPrivilege	2636	wmic.exe
Token: SeUndockPrivilege	2636	wmic.exe
Token: SeManageVolumePrivilege	2636	wmic.exe
Token: 33	2636	wmic.exe
Token: 34	2636	wmic.exe
Token: 35	2636	wmic.exe
Token: SeIncreaseQuotaPrivilege	2636	wmic.exe
Token: SeSecurityPrivilege	2636	wmic.exe
Token: SeTakeOwnershipPrivilege	2636	wmic.exe
Token: SeLoadDriverPrivilege	2636	wmic.exe
Token: SeSystemProfilePrivilege	2636	wmic.exe
Token: SeSystemtimePrivilege	2636	wmic.exe
Token: SeProfSingleProcessPrivilege	2636	wmic.exe
Token: SeIncBasePriorityPrivilege	2636	wmic.exe
Token: SeCreatePagefilePrivilege	2636	wmic.exe
Token: SeBackupPrivilege	2636	wmic.exe
Token: SeRestorePrivilege	2636	wmic.exe
Token: SeShutdownPrivilege	2636	wmic.exe
Token: SeDebugPrivilege	2636	wmic.exe
Token: SeSystemEnvironmentPrivilege	2636	wmic.exe
Token: SeRemoteShutdownPrivilege	2636	wmic.exe
Token: SeUndockPrivilege	2636	wmic.exe
Token: SeManageVolumePrivilege	2636	wmic.exe
Token: 33	2636	wmic.exe
Token: 34	2636	wmic.exe
Token: 35	2636	wmic.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	2664	powershell.exe
Token: SeDebugPrivilege	1944	powershell.exe
Token: SeDebugPrivilege	1732	powershell.exe
Token: SeIncreaseQuotaPrivilege	2860	wmic.exe
Token: SeSecurityPrivilege	2860	wmic.exe
Token: SeTakeOwnershipPrivilege	2860	wmic.exe
Token: SeLoadDriverPrivilege	2860	wmic.exe
Token: SeSystemProfilePrivilege	2860	wmic.exe
Token: SeSystemtimePrivilege	2860	wmic.exe
Token: SeProfSingleProcessPrivilege	2860	wmic.exe
Token: SeIncBasePriorityPrivilege	2860	wmic.exe
Token: SeCreatePagefilePrivilege	2860	wmic.exe
Token: SeBackupPrivilege	2860	wmic.exe
Token: SeRestorePrivilege	2860	wmic.exe
Token: SeShutdownPrivilege	2860	wmic.exe
Token: SeDebugPrivilege	2860	wmic.exe
Token: SeSystemEnvironmentPrivilege	2860	wmic.exe
Token: SeRemoteShutdownPrivilege	2860	wmic.exe
Token: SeUndockPrivilege	2860	wmic.exe
Token: SeManageVolumePrivilege	2860	wmic.exe
Token: 33	2860	wmic.exe
Token: 34	2860	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2636	2072	drivers.exe	31
PID 2072 wrote to memory of 2636	2072	drivers.exe	31
PID 2072 wrote to memory of 2636	2072	drivers.exe	31
PID 2072 wrote to memory of 2892	2072	drivers.exe	34
PID 2072 wrote to memory of 2892	2072	drivers.exe	34
PID 2072 wrote to memory of 2892	2072	drivers.exe	34
PID 2072 wrote to memory of 2664	2072	drivers.exe	36
PID 2072 wrote to memory of 2664	2072	drivers.exe	36
PID 2072 wrote to memory of 2664	2072	drivers.exe	36
PID 2072 wrote to memory of 1944	2072	drivers.exe	38
PID 2072 wrote to memory of 1944	2072	drivers.exe	38
PID 2072 wrote to memory of 1944	2072	drivers.exe	38
PID 2072 wrote to memory of 1732	2072	drivers.exe	41
PID 2072 wrote to memory of 1732	2072	drivers.exe	41
PID 2072 wrote to memory of 1732	2072	drivers.exe	41
PID 2072 wrote to memory of 2860	2072	drivers.exe	44
PID 2072 wrote to memory of 2860	2072	drivers.exe	44
PID 2072 wrote to memory of 2860	2072	drivers.exe	44
PID 2072 wrote to memory of 2784	2072	drivers.exe	46
PID 2072 wrote to memory of 2784	2072	drivers.exe	46
PID 2072 wrote to memory of 2784	2072	drivers.exe	46
PID 2072 wrote to memory of 2192	2072	drivers.exe	48
PID 2072 wrote to memory of 2192	2072	drivers.exe	48
PID 2072 wrote to memory of 2192	2072	drivers.exe	48
PID 2072 wrote to memory of 2624	2072	drivers.exe	50
PID 2072 wrote to memory of 2624	2072	drivers.exe	50
PID 2072 wrote to memory of 2624	2072	drivers.exe	50
PID 2072 wrote to memory of 1224	2072	drivers.exe	52
PID 2072 wrote to memory of 1224	2072	drivers.exe	52
PID 2072 wrote to memory of 1224	2072	drivers.exe	52

C:\Users\Admin\AppData\Local\Temp\drivers.exe
"C:\Users\Admin\AppData\Local\Temp\drivers.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\drivers.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2892
- 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:2664
- 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:1944
- 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:1732
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2784
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2192
- 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:2624
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1224

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1164

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
a349f6edcca7b22d7ca72c2bfc07061b

SHA1
a7a05f489924729b039d60e851fcaebc98885bce

SHA256
8838476d652de9c9aa28a8e21567e341f78e0be9ce12d2c5466ecc30a4536119

SHA512
9b291c81fec3c34176c590dc26839930bb796a83f096a6b0af2fbd20dca338d42bf741731b40e777e62d6b95b8f7c05fdbc15f7bc06333d406f5c3d34a1c143a

Download Submit
memory/2072-31-0x000007FEF4D53000-0x000007FEF4D54000-memory.dmp

Filesize
4KB

Download
memory/2072-1-0x0000000000C70000-0x0000000000CB0000-memory.dmp

Filesize
256KB

Download
memory/2072-2-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

Filesize
9.9MB

Download
memory/2072-49-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

Filesize
9.9MB

Download
memory/2072-0-0x000007FEF4D53000-0x000007FEF4D54000-memory.dmp

Filesize
4KB

Download
memory/2072-37-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

Filesize
9.9MB

Download
memory/2624-45-0x00000000023F0000-0x00000000023F8000-memory.dmp

Filesize
32KB

Download
memory/2664-14-0x000000001B2F0000-0x000000001B5D2000-memory.dmp

Filesize
2.9MB

Download
memory/2664-15-0x0000000002760000-0x0000000002768000-memory.dmp

Filesize
32KB

Download
memory/2892-8-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2892-7-0x000000001B290000-0x000000001B572000-memory.dmp

Filesize
2.9MB

Download