umbral | 2322d185fb947885fcdd2b3a5ef43453b3318f5b997f07b6b9cb9c1865f21b6e

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-02-2025 21:02

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General

Target

Nebula Executor.exe
Size

311KB
MD5

d8f0449ae074e8752ec44bb5c000f0b2
SHA1

a56a5838c50a83d35c0e49909f225408014a1a78
SHA256

2322d185fb947885fcdd2b3a5ef43453b3318f5b997f07b6b9cb9c1865f21b6e
SHA512

488bfc856814dc453b9fd5d79d4dfeeeefef85711ef2fc967881fa407ba3d332e5ca8ba557ca71796c786c14d3f9f2c2145d65c508b44dc304aa38b9763378ea
SSDEEP

6144:XloZM+rIkd8g+EtXHkv/iD40TTIywvrYjhkijD6CO1b8e1m64iPpGErmx4OmoW:1oZtL+EP80TTIywvrYjhkijD6zzBPpN5

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2036-1-0x0000000001170000-0x00000000011C4000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1492	powershell.exe
2560	powershell.exe
1440	powershell.exe
2244	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2008	cmd.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
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

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2008	cmd.exe
1484	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
704	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1484	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2036	Nebula Executor.exe
2244	powershell.exe
1492	powershell.exe
2560	powershell.exe
1976	powershell.exe
1440	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	Nebula Executor.exe
Token: SeIncreaseQuotaPrivilege	2784	wmic.exe
Token: SeSecurityPrivilege	2784	wmic.exe
Token: SeTakeOwnershipPrivilege	2784	wmic.exe
Token: SeLoadDriverPrivilege	2784	wmic.exe
Token: SeSystemProfilePrivilege	2784	wmic.exe
Token: SeSystemtimePrivilege	2784	wmic.exe
Token: SeProfSingleProcessPrivilege	2784	wmic.exe
Token: SeIncBasePriorityPrivilege	2784	wmic.exe
Token: SeCreatePagefilePrivilege	2784	wmic.exe
Token: SeBackupPrivilege	2784	wmic.exe
Token: SeRestorePrivilege	2784	wmic.exe
Token: SeShutdownPrivilege	2784	wmic.exe
Token: SeDebugPrivilege	2784	wmic.exe
Token: SeSystemEnvironmentPrivilege	2784	wmic.exe
Token: SeRemoteShutdownPrivilege	2784	wmic.exe
Token: SeUndockPrivilege	2784	wmic.exe
Token: SeManageVolumePrivilege	2784	wmic.exe
Token: 33	2784	wmic.exe
Token: 34	2784	wmic.exe
Token: 35	2784	wmic.exe
Token: SeIncreaseQuotaPrivilege	2784	wmic.exe
Token: SeSecurityPrivilege	2784	wmic.exe
Token: SeTakeOwnershipPrivilege	2784	wmic.exe
Token: SeLoadDriverPrivilege	2784	wmic.exe
Token: SeSystemProfilePrivilege	2784	wmic.exe
Token: SeSystemtimePrivilege	2784	wmic.exe
Token: SeProfSingleProcessPrivilege	2784	wmic.exe
Token: SeIncBasePriorityPrivilege	2784	wmic.exe
Token: SeCreatePagefilePrivilege	2784	wmic.exe
Token: SeBackupPrivilege	2784	wmic.exe
Token: SeRestorePrivilege	2784	wmic.exe
Token: SeShutdownPrivilege	2784	wmic.exe
Token: SeDebugPrivilege	2784	wmic.exe
Token: SeSystemEnvironmentPrivilege	2784	wmic.exe
Token: SeRemoteShutdownPrivilege	2784	wmic.exe
Token: SeUndockPrivilege	2784	wmic.exe
Token: SeManageVolumePrivilege	2784	wmic.exe
Token: 33	2784	wmic.exe
Token: 34	2784	wmic.exe
Token: 35	2784	wmic.exe
Token: SeDebugPrivilege	2244	powershell.exe
Token: SeDebugPrivilege	1492	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	1976	powershell.exe
Token: SeIncreaseQuotaPrivilege	1332	wmic.exe
Token: SeSecurityPrivilege	1332	wmic.exe
Token: SeTakeOwnershipPrivilege	1332	wmic.exe
Token: SeLoadDriverPrivilege	1332	wmic.exe
Token: SeSystemProfilePrivilege	1332	wmic.exe
Token: SeSystemtimePrivilege	1332	wmic.exe
Token: SeProfSingleProcessPrivilege	1332	wmic.exe
Token: SeIncBasePriorityPrivilege	1332	wmic.exe
Token: SeCreatePagefilePrivilege	1332	wmic.exe
Token: SeBackupPrivilege	1332	wmic.exe
Token: SeRestorePrivilege	1332	wmic.exe
Token: SeShutdownPrivilege	1332	wmic.exe
Token: SeDebugPrivilege	1332	wmic.exe
Token: SeSystemEnvironmentPrivilege	1332	wmic.exe
Token: SeRemoteShutdownPrivilege	1332	wmic.exe
Token: SeUndockPrivilege	1332	wmic.exe
Token: SeManageVolumePrivilege	1332	wmic.exe
Token: 33	1332	wmic.exe
Token: 34	1332	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 2784	2036	Nebula Executor.exe	30
PID 2036 wrote to memory of 2784	2036	Nebula Executor.exe	30
PID 2036 wrote to memory of 2784	2036	Nebula Executor.exe	30
PID 2036 wrote to memory of 2212	2036	Nebula Executor.exe	33
PID 2036 wrote to memory of 2212	2036	Nebula Executor.exe	33
PID 2036 wrote to memory of 2212	2036	Nebula Executor.exe	33
PID 2036 wrote to memory of 2244	2036	Nebula Executor.exe	35
PID 2036 wrote to memory of 2244	2036	Nebula Executor.exe	35
PID 2036 wrote to memory of 2244	2036	Nebula Executor.exe	35
PID 2036 wrote to memory of 1492	2036	Nebula Executor.exe	37
PID 2036 wrote to memory of 1492	2036	Nebula Executor.exe	37
PID 2036 wrote to memory of 1492	2036	Nebula Executor.exe	37
PID 2036 wrote to memory of 2560	2036	Nebula Executor.exe	39
PID 2036 wrote to memory of 2560	2036	Nebula Executor.exe	39
PID 2036 wrote to memory of 2560	2036	Nebula Executor.exe	39
PID 2036 wrote to memory of 1976	2036	Nebula Executor.exe	41
PID 2036 wrote to memory of 1976	2036	Nebula Executor.exe	41
PID 2036 wrote to memory of 1976	2036	Nebula Executor.exe	41
PID 2036 wrote to memory of 1332	2036	Nebula Executor.exe	43
PID 2036 wrote to memory of 1332	2036	Nebula Executor.exe	43
PID 2036 wrote to memory of 1332	2036	Nebula Executor.exe	43
PID 2036 wrote to memory of 1312	2036	Nebula Executor.exe	45
PID 2036 wrote to memory of 1312	2036	Nebula Executor.exe	45
PID 2036 wrote to memory of 1312	2036	Nebula Executor.exe	45
PID 2036 wrote to memory of 1524	2036	Nebula Executor.exe	47
PID 2036 wrote to memory of 1524	2036	Nebula Executor.exe	47
PID 2036 wrote to memory of 1524	2036	Nebula Executor.exe	47
PID 2036 wrote to memory of 1440	2036	Nebula Executor.exe	49
PID 2036 wrote to memory of 1440	2036	Nebula Executor.exe	49
PID 2036 wrote to memory of 1440	2036	Nebula Executor.exe	49
PID 2036 wrote to memory of 704	2036	Nebula Executor.exe	51
PID 2036 wrote to memory of 704	2036	Nebula Executor.exe	51
PID 2036 wrote to memory of 704	2036	Nebula Executor.exe	51
PID 2036 wrote to memory of 2008	2036	Nebula Executor.exe	53
PID 2036 wrote to memory of 2008	2036	Nebula Executor.exe	53
PID 2036 wrote to memory of 2008	2036	Nebula Executor.exe	53
PID 2008 wrote to memory of 1484	2008	cmd.exe	55
PID 2008 wrote to memory of 1484	2008	cmd.exe	55
PID 2008 wrote to memory of 1484	2008	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2212	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Nebula Executor.exe
"C:\Users\Admin\AppData\Local\Temp\Nebula Executor.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2784
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Nebula Executor.exe"
  2⤵
  - Views/modifies file attributes
  PID:2212
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Nebula Executor.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2244
- 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:1492
- 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:2560
- 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:1976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1312
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1524
- 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:1440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:704
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Nebula Executor.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1484

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
5b64015c8e39ef2a7715178a7deea646

SHA1
077aa593469f41bdac6492b5374d95158ade011b

SHA256
3f3ae850da54e80de1272cf45a18316954e2042559304a0eebeda9b9541c155c

SHA512
96c9e3eb1bd11dfa91f0590f3211eaf8467b344cb54a1179c45dc0c448d0cd279eec8b2e414b131bb590700a8920207ac8d171718b0a796d536ce60c8fb4e8bb

Download Submit
memory/1440-43-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/1492-14-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/1492-15-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download
memory/2036-0-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2036-1-0x0000000001170000-0x00000000011C4000-memory.dmp

Filesize
336KB

Download
memory/2036-2-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2036-47-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-7-0x000000001B790000-0x000000001BA72000-memory.dmp

Filesize
2.9MB

Download
memory/2244-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download