umbral | 4fec5552f2a39ddd4bdcfd316ac96ecf9f6a413fb3a674d058d1695b88c8db5f

Analysis

max time kernel
122s
max time network
136s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
28-07-2024 16:14

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General

Target

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/2080-1-0x0000000001320000-0x0000000001366000-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
2672	powershell.exe
1584	powershell.exe
2532	powershell.exe
912	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
2164	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
7	discord.com
8	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
4	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
2164	cmd.exe
2204	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2236	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2204	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2080	dead-builder.exe
2672	powershell.exe
1584	powershell.exe
2532	powershell.exe
1744	powershell.exe
912	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2080	dead-builder.exe
Token: SeIncreaseQuotaPrivilege	2688	wmic.exe
Token: SeSecurityPrivilege	2688	wmic.exe
Token: SeTakeOwnershipPrivilege	2688	wmic.exe
Token: SeLoadDriverPrivilege	2688	wmic.exe
Token: SeSystemProfilePrivilege	2688	wmic.exe
Token: SeSystemtimePrivilege	2688	wmic.exe
Token: SeProfSingleProcessPrivilege	2688	wmic.exe
Token: SeIncBasePriorityPrivilege	2688	wmic.exe
Token: SeCreatePagefilePrivilege	2688	wmic.exe
Token: SeBackupPrivilege	2688	wmic.exe
Token: SeRestorePrivilege	2688	wmic.exe
Token: SeShutdownPrivilege	2688	wmic.exe
Token: SeDebugPrivilege	2688	wmic.exe
Token: SeSystemEnvironmentPrivilege	2688	wmic.exe
Token: SeRemoteShutdownPrivilege	2688	wmic.exe
Token: SeUndockPrivilege	2688	wmic.exe
Token: SeManageVolumePrivilege	2688	wmic.exe
Token: 33	2688	wmic.exe
Token: 34	2688	wmic.exe
Token: 35	2688	wmic.exe
Token: SeIncreaseQuotaPrivilege	2688	wmic.exe
Token: SeSecurityPrivilege	2688	wmic.exe
Token: SeTakeOwnershipPrivilege	2688	wmic.exe
Token: SeLoadDriverPrivilege	2688	wmic.exe
Token: SeSystemProfilePrivilege	2688	wmic.exe
Token: SeSystemtimePrivilege	2688	wmic.exe
Token: SeProfSingleProcessPrivilege	2688	wmic.exe
Token: SeIncBasePriorityPrivilege	2688	wmic.exe
Token: SeCreatePagefilePrivilege	2688	wmic.exe
Token: SeBackupPrivilege	2688	wmic.exe
Token: SeRestorePrivilege	2688	wmic.exe
Token: SeShutdownPrivilege	2688	wmic.exe
Token: SeDebugPrivilege	2688	wmic.exe
Token: SeSystemEnvironmentPrivilege	2688	wmic.exe
Token: SeRemoteShutdownPrivilege	2688	wmic.exe
Token: SeUndockPrivilege	2688	wmic.exe
Token: SeManageVolumePrivilege	2688	wmic.exe
Token: 33	2688	wmic.exe
Token: 34	2688	wmic.exe
Token: 35	2688	wmic.exe
Token: SeDebugPrivilege	2672	powershell.exe
Token: SeDebugPrivilege	1584	powershell.exe
Token: SeDebugPrivilege	2532	powershell.exe
Token: SeDebugPrivilege	1744	powershell.exe
Token: SeIncreaseQuotaPrivilege	2244	wmic.exe
Token: SeSecurityPrivilege	2244	wmic.exe
Token: SeTakeOwnershipPrivilege	2244	wmic.exe
Token: SeLoadDriverPrivilege	2244	wmic.exe
Token: SeSystemProfilePrivilege	2244	wmic.exe
Token: SeSystemtimePrivilege	2244	wmic.exe
Token: SeProfSingleProcessPrivilege	2244	wmic.exe
Token: SeIncBasePriorityPrivilege	2244	wmic.exe
Token: SeCreatePagefilePrivilege	2244	wmic.exe
Token: SeBackupPrivilege	2244	wmic.exe
Token: SeRestorePrivilege	2244	wmic.exe
Token: SeShutdownPrivilege	2244	wmic.exe
Token: SeDebugPrivilege	2244	wmic.exe
Token: SeSystemEnvironmentPrivilege	2244	wmic.exe
Token: SeRemoteShutdownPrivilege	2244	wmic.exe
Token: SeUndockPrivilege	2244	wmic.exe
Token: SeManageVolumePrivilege	2244	wmic.exe
Token: 33	2244	wmic.exe
Token: 34	2244	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2688	2080	dead-builder.exe	30
PID 2080 wrote to memory of 2688	2080	dead-builder.exe	30
PID 2080 wrote to memory of 2688	2080	dead-builder.exe	30
PID 2080 wrote to memory of 2696	2080	dead-builder.exe	33
PID 2080 wrote to memory of 2696	2080	dead-builder.exe	33
PID 2080 wrote to memory of 2696	2080	dead-builder.exe	33
PID 2080 wrote to memory of 2672	2080	dead-builder.exe	35
PID 2080 wrote to memory of 2672	2080	dead-builder.exe	35
PID 2080 wrote to memory of 2672	2080	dead-builder.exe	35
PID 2080 wrote to memory of 1584	2080	dead-builder.exe	37
PID 2080 wrote to memory of 1584	2080	dead-builder.exe	37
PID 2080 wrote to memory of 1584	2080	dead-builder.exe	37
PID 2080 wrote to memory of 2532	2080	dead-builder.exe	39
PID 2080 wrote to memory of 2532	2080	dead-builder.exe	39
PID 2080 wrote to memory of 2532	2080	dead-builder.exe	39
PID 2080 wrote to memory of 1744	2080	dead-builder.exe	41
PID 2080 wrote to memory of 1744	2080	dead-builder.exe	41
PID 2080 wrote to memory of 1744	2080	dead-builder.exe	41
PID 2080 wrote to memory of 2244	2080	dead-builder.exe	43
PID 2080 wrote to memory of 2244	2080	dead-builder.exe	43
PID 2080 wrote to memory of 2244	2080	dead-builder.exe	43
PID 2080 wrote to memory of 1604	2080	dead-builder.exe	45
PID 2080 wrote to memory of 1604	2080	dead-builder.exe	45
PID 2080 wrote to memory of 1604	2080	dead-builder.exe	45
PID 2080 wrote to memory of 1652	2080	dead-builder.exe	47
PID 2080 wrote to memory of 1652	2080	dead-builder.exe	47
PID 2080 wrote to memory of 1652	2080	dead-builder.exe	47
PID 2080 wrote to memory of 912	2080	dead-builder.exe	49
PID 2080 wrote to memory of 912	2080	dead-builder.exe	49
PID 2080 wrote to memory of 912	2080	dead-builder.exe	49
PID 2080 wrote to memory of 2236	2080	dead-builder.exe	51
PID 2080 wrote to memory of 2236	2080	dead-builder.exe	51
PID 2080 wrote to memory of 2236	2080	dead-builder.exe	51
PID 2080 wrote to memory of 2164	2080	dead-builder.exe	53
PID 2080 wrote to memory of 2164	2080	dead-builder.exe	53
PID 2080 wrote to memory of 2164	2080	dead-builder.exe	53
PID 2164 wrote to memory of 2204	2164	cmd.exe	55
PID 2164 wrote to memory of 2204	2164	cmd.exe	55
PID 2164 wrote to memory of 2204	2164	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2696	attrib.exe

C:\Users\Admin\AppData\Local\Temp\dead-builder.exe
"C:\Users\Admin\AppData\Local\Temp\dead-builder.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2688
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\dead-builder.exe"
  2⤵
  - Views/modifies file attributes
  PID:2696
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\dead-builder.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2672
- 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:1584
- 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:2532
- 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:1744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2244
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1652
- 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:912
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2236
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\dead-builder.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2164
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2204

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
116a36b23e768ecda7790c96a03a89ab

SHA1
6487cfe9829e82867743e451b51f6c4e8dd90661

SHA256
75b8b7add407c94dd51584abb00a001e850ea78c52872e2de2510a3e10e41164

SHA512
533d044bc42eaeed36d940895a8286a8f3095b399bfc466af5d34e8ba667e581d6cb4856d9f0107a96b351074238231fb2e4096f2e08485dc576e9d803f3c2f7

Download Submit
memory/912-43-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/1584-14-0x000000001B4C0000-0x000000001B7A2000-memory.dmp

Filesize
2.9MB

Download
memory/1584-15-0x0000000002800000-0x0000000002808000-memory.dmp

Filesize
32KB

Download
memory/2080-0-0x000007FEF6163000-0x000007FEF6164000-memory.dmp

Filesize
4KB

Download
memory/2080-1-0x0000000001320000-0x0000000001366000-memory.dmp

Filesize
280KB

Download
memory/2080-2-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2080-47-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2672-7-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2672-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download