umbral | bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
17-08-2024 13:35

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General

Target

67735e43b595bc948f427fbc1d4d9400N.exe
Size

229KB
MD5

67735e43b595bc948f427fbc1d4d9400
SHA1

df92217c3101826bf0ae4c8ba53e40026e64dcc3
SHA256

bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6
SHA512

492b3d5372137ca3c3ad287fb84ab40ac6609eff5cf329a039f29b25c39d8c348bf547f01d6e90616e9c11593bf8f294cc73858917ca0ef2a7d03c91d6b89d14
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4vc/yrRiK13wBzOurcVfb8e1mki:noZ0L+EP8vc/yrRiK13wBzOurCG

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2688-1-0x0000000000A90000-0x0000000000AD0000-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
2752	powershell.exe
2612	powershell.exe
2660	powershell.exe
1532	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	67735e43b595bc948f427fbc1d4d9400N.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
9	discord.com
10	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
2804	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2688	67735e43b595bc948f427fbc1d4d9400N.exe
2752	powershell.exe
2612	powershell.exe
2660	powershell.exe
2284	powershell.exe
1532	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	67735e43b595bc948f427fbc1d4d9400N.exe
Token: SeIncreaseQuotaPrivilege	2380	wmic.exe
Token: SeSecurityPrivilege	2380	wmic.exe
Token: SeTakeOwnershipPrivilege	2380	wmic.exe
Token: SeLoadDriverPrivilege	2380	wmic.exe
Token: SeSystemProfilePrivilege	2380	wmic.exe
Token: SeSystemtimePrivilege	2380	wmic.exe
Token: SeProfSingleProcessPrivilege	2380	wmic.exe
Token: SeIncBasePriorityPrivilege	2380	wmic.exe
Token: SeCreatePagefilePrivilege	2380	wmic.exe
Token: SeBackupPrivilege	2380	wmic.exe
Token: SeRestorePrivilege	2380	wmic.exe
Token: SeShutdownPrivilege	2380	wmic.exe
Token: SeDebugPrivilege	2380	wmic.exe
Token: SeSystemEnvironmentPrivilege	2380	wmic.exe
Token: SeRemoteShutdownPrivilege	2380	wmic.exe
Token: SeUndockPrivilege	2380	wmic.exe
Token: SeManageVolumePrivilege	2380	wmic.exe
Token: 33	2380	wmic.exe
Token: 34	2380	wmic.exe
Token: 35	2380	wmic.exe
Token: SeIncreaseQuotaPrivilege	2380	wmic.exe
Token: SeSecurityPrivilege	2380	wmic.exe
Token: SeTakeOwnershipPrivilege	2380	wmic.exe
Token: SeLoadDriverPrivilege	2380	wmic.exe
Token: SeSystemProfilePrivilege	2380	wmic.exe
Token: SeSystemtimePrivilege	2380	wmic.exe
Token: SeProfSingleProcessPrivilege	2380	wmic.exe
Token: SeIncBasePriorityPrivilege	2380	wmic.exe
Token: SeCreatePagefilePrivilege	2380	wmic.exe
Token: SeBackupPrivilege	2380	wmic.exe
Token: SeRestorePrivilege	2380	wmic.exe
Token: SeShutdownPrivilege	2380	wmic.exe
Token: SeDebugPrivilege	2380	wmic.exe
Token: SeSystemEnvironmentPrivilege	2380	wmic.exe
Token: SeRemoteShutdownPrivilege	2380	wmic.exe
Token: SeUndockPrivilege	2380	wmic.exe
Token: SeManageVolumePrivilege	2380	wmic.exe
Token: 33	2380	wmic.exe
Token: 34	2380	wmic.exe
Token: 35	2380	wmic.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2612	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	2284	powershell.exe
Token: SeIncreaseQuotaPrivilege	2496	wmic.exe
Token: SeSecurityPrivilege	2496	wmic.exe
Token: SeTakeOwnershipPrivilege	2496	wmic.exe
Token: SeLoadDriverPrivilege	2496	wmic.exe
Token: SeSystemProfilePrivilege	2496	wmic.exe
Token: SeSystemtimePrivilege	2496	wmic.exe
Token: SeProfSingleProcessPrivilege	2496	wmic.exe
Token: SeIncBasePriorityPrivilege	2496	wmic.exe
Token: SeCreatePagefilePrivilege	2496	wmic.exe
Token: SeBackupPrivilege	2496	wmic.exe
Token: SeRestorePrivilege	2496	wmic.exe
Token: SeShutdownPrivilege	2496	wmic.exe
Token: SeDebugPrivilege	2496	wmic.exe
Token: SeSystemEnvironmentPrivilege	2496	wmic.exe
Token: SeRemoteShutdownPrivilege	2496	wmic.exe
Token: SeUndockPrivilege	2496	wmic.exe
Token: SeManageVolumePrivilege	2496	wmic.exe
Token: 33	2496	wmic.exe
Token: 34	2496	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2380	2688	67735e43b595bc948f427fbc1d4d9400N.exe	31
PID 2688 wrote to memory of 2380	2688	67735e43b595bc948f427fbc1d4d9400N.exe	31
PID 2688 wrote to memory of 2380	2688	67735e43b595bc948f427fbc1d4d9400N.exe	31
PID 2688 wrote to memory of 2752	2688	67735e43b595bc948f427fbc1d4d9400N.exe	34
PID 2688 wrote to memory of 2752	2688	67735e43b595bc948f427fbc1d4d9400N.exe	34
PID 2688 wrote to memory of 2752	2688	67735e43b595bc948f427fbc1d4d9400N.exe	34
PID 2688 wrote to memory of 2612	2688	67735e43b595bc948f427fbc1d4d9400N.exe	36
PID 2688 wrote to memory of 2612	2688	67735e43b595bc948f427fbc1d4d9400N.exe	36
PID 2688 wrote to memory of 2612	2688	67735e43b595bc948f427fbc1d4d9400N.exe	36
PID 2688 wrote to memory of 2660	2688	67735e43b595bc948f427fbc1d4d9400N.exe	38
PID 2688 wrote to memory of 2660	2688	67735e43b595bc948f427fbc1d4d9400N.exe	38
PID 2688 wrote to memory of 2660	2688	67735e43b595bc948f427fbc1d4d9400N.exe	38
PID 2688 wrote to memory of 2284	2688	67735e43b595bc948f427fbc1d4d9400N.exe	40
PID 2688 wrote to memory of 2284	2688	67735e43b595bc948f427fbc1d4d9400N.exe	40
PID 2688 wrote to memory of 2284	2688	67735e43b595bc948f427fbc1d4d9400N.exe	40
PID 2688 wrote to memory of 2496	2688	67735e43b595bc948f427fbc1d4d9400N.exe	42
PID 2688 wrote to memory of 2496	2688	67735e43b595bc948f427fbc1d4d9400N.exe	42
PID 2688 wrote to memory of 2496	2688	67735e43b595bc948f427fbc1d4d9400N.exe	42
PID 2688 wrote to memory of 988	2688	67735e43b595bc948f427fbc1d4d9400N.exe	44
PID 2688 wrote to memory of 988	2688	67735e43b595bc948f427fbc1d4d9400N.exe	44
PID 2688 wrote to memory of 988	2688	67735e43b595bc948f427fbc1d4d9400N.exe	44
PID 2688 wrote to memory of 1984	2688	67735e43b595bc948f427fbc1d4d9400N.exe	46
PID 2688 wrote to memory of 1984	2688	67735e43b595bc948f427fbc1d4d9400N.exe	46
PID 2688 wrote to memory of 1984	2688	67735e43b595bc948f427fbc1d4d9400N.exe	46
PID 2688 wrote to memory of 1532	2688	67735e43b595bc948f427fbc1d4d9400N.exe	48
PID 2688 wrote to memory of 1532	2688	67735e43b595bc948f427fbc1d4d9400N.exe	48
PID 2688 wrote to memory of 1532	2688	67735e43b595bc948f427fbc1d4d9400N.exe	48
PID 2688 wrote to memory of 2804	2688	67735e43b595bc948f427fbc1d4d9400N.exe	50
PID 2688 wrote to memory of 2804	2688	67735e43b595bc948f427fbc1d4d9400N.exe	50
PID 2688 wrote to memory of 2804	2688	67735e43b595bc948f427fbc1d4d9400N.exe	50

C:\Users\Admin\AppData\Local\Temp\67735e43b595bc948f427fbc1d4d9400N.exe
"C:\Users\Admin\AppData\Local\Temp\67735e43b595bc948f427fbc1d4d9400N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2380
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\67735e43b595bc948f427fbc1d4d9400N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- 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:2612
- 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:2660
- 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:2284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2496
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:988
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1984
- 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:1532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2804

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
2b5dcaecd73525701b791b19d9e778eb

SHA1
7389636df94998d9747026de12f2c0f6b7ebe766

SHA256
56cf8bf21a8982bbfad019d7b78b127e6290addb3412b0445ac350a4b5266baf

SHA512
b52c2b9f234f40fd4e0058d4ff2d4c12a86365efff633e1c9209a3cb5180e0adca4ad6d5a11996b8500ca1bf0e43c38191aa60b115551056e085b00a853adf47

Download Submit
memory/1532-43-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2612-14-0x000000001B4B0000-0x000000001B792000-memory.dmp

Filesize
2.9MB

Download
memory/2612-15-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2688-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/2688-1-0x0000000000A90000-0x0000000000AD0000-memory.dmp

Filesize
256KB

Download
memory/2688-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2688-47-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2752-7-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2752-8-0x00000000021E0000-0x00000000021E8000-memory.dmp

Filesize
32KB

Download