umbral | 1b9385d02d7257137ac792f32b3109b02a01c720de368c1f334ec8f54638f795

Analysis

max time kernel
21s
max time network
22s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
10-08-2024 04:43

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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/2172-1-0x0000000000870000-0x00000000008B6000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2664	powershell.exe
2704	powershell.exe
1992	powershell.exe
2840	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
3016	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
3016	cmd.exe
2272	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2068	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2272	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2172	dead-builder.exe
2840	powershell.exe
2664	powershell.exe
2704	powershell.exe
1012	powershell.exe
1992	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	dead-builder.exe
Token: SeIncreaseQuotaPrivilege	1636	wmic.exe
Token: SeSecurityPrivilege	1636	wmic.exe
Token: SeTakeOwnershipPrivilege	1636	wmic.exe
Token: SeLoadDriverPrivilege	1636	wmic.exe
Token: SeSystemProfilePrivilege	1636	wmic.exe
Token: SeSystemtimePrivilege	1636	wmic.exe
Token: SeProfSingleProcessPrivilege	1636	wmic.exe
Token: SeIncBasePriorityPrivilege	1636	wmic.exe
Token: SeCreatePagefilePrivilege	1636	wmic.exe
Token: SeBackupPrivilege	1636	wmic.exe
Token: SeRestorePrivilege	1636	wmic.exe
Token: SeShutdownPrivilege	1636	wmic.exe
Token: SeDebugPrivilege	1636	wmic.exe
Token: SeSystemEnvironmentPrivilege	1636	wmic.exe
Token: SeRemoteShutdownPrivilege	1636	wmic.exe
Token: SeUndockPrivilege	1636	wmic.exe
Token: SeManageVolumePrivilege	1636	wmic.exe
Token: 33	1636	wmic.exe
Token: 34	1636	wmic.exe
Token: 35	1636	wmic.exe
Token: SeIncreaseQuotaPrivilege	1636	wmic.exe
Token: SeSecurityPrivilege	1636	wmic.exe
Token: SeTakeOwnershipPrivilege	1636	wmic.exe
Token: SeLoadDriverPrivilege	1636	wmic.exe
Token: SeSystemProfilePrivilege	1636	wmic.exe
Token: SeSystemtimePrivilege	1636	wmic.exe
Token: SeProfSingleProcessPrivilege	1636	wmic.exe
Token: SeIncBasePriorityPrivilege	1636	wmic.exe
Token: SeCreatePagefilePrivilege	1636	wmic.exe
Token: SeBackupPrivilege	1636	wmic.exe
Token: SeRestorePrivilege	1636	wmic.exe
Token: SeShutdownPrivilege	1636	wmic.exe
Token: SeDebugPrivilege	1636	wmic.exe
Token: SeSystemEnvironmentPrivilege	1636	wmic.exe
Token: SeRemoteShutdownPrivilege	1636	wmic.exe
Token: SeUndockPrivilege	1636	wmic.exe
Token: SeManageVolumePrivilege	1636	wmic.exe
Token: 33	1636	wmic.exe
Token: 34	1636	wmic.exe
Token: 35	1636	wmic.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	2664	powershell.exe
Token: SeDebugPrivilege	2704	powershell.exe
Token: SeDebugPrivilege	1012	powershell.exe
Token: SeIncreaseQuotaPrivilege	2008	wmic.exe
Token: SeSecurityPrivilege	2008	wmic.exe
Token: SeTakeOwnershipPrivilege	2008	wmic.exe
Token: SeLoadDriverPrivilege	2008	wmic.exe
Token: SeSystemProfilePrivilege	2008	wmic.exe
Token: SeSystemtimePrivilege	2008	wmic.exe
Token: SeProfSingleProcessPrivilege	2008	wmic.exe
Token: SeIncBasePriorityPrivilege	2008	wmic.exe
Token: SeCreatePagefilePrivilege	2008	wmic.exe
Token: SeBackupPrivilege	2008	wmic.exe
Token: SeRestorePrivilege	2008	wmic.exe
Token: SeShutdownPrivilege	2008	wmic.exe
Token: SeDebugPrivilege	2008	wmic.exe
Token: SeSystemEnvironmentPrivilege	2008	wmic.exe
Token: SeRemoteShutdownPrivilege	2008	wmic.exe
Token: SeUndockPrivilege	2008	wmic.exe
Token: SeManageVolumePrivilege	2008	wmic.exe
Token: 33	2008	wmic.exe
Token: 34	2008	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 1636	2172	dead-builder.exe	29
PID 2172 wrote to memory of 1636	2172	dead-builder.exe	29
PID 2172 wrote to memory of 1636	2172	dead-builder.exe	29
PID 2172 wrote to memory of 2736	2172	dead-builder.exe	32
PID 2172 wrote to memory of 2736	2172	dead-builder.exe	32
PID 2172 wrote to memory of 2736	2172	dead-builder.exe	32
PID 2172 wrote to memory of 2840	2172	dead-builder.exe	34
PID 2172 wrote to memory of 2840	2172	dead-builder.exe	34
PID 2172 wrote to memory of 2840	2172	dead-builder.exe	34
PID 2172 wrote to memory of 2664	2172	dead-builder.exe	36
PID 2172 wrote to memory of 2664	2172	dead-builder.exe	36
PID 2172 wrote to memory of 2664	2172	dead-builder.exe	36
PID 2172 wrote to memory of 2704	2172	dead-builder.exe	38
PID 2172 wrote to memory of 2704	2172	dead-builder.exe	38
PID 2172 wrote to memory of 2704	2172	dead-builder.exe	38
PID 2172 wrote to memory of 1012	2172	dead-builder.exe	40
PID 2172 wrote to memory of 1012	2172	dead-builder.exe	40
PID 2172 wrote to memory of 1012	2172	dead-builder.exe	40
PID 2172 wrote to memory of 2008	2172	dead-builder.exe	42
PID 2172 wrote to memory of 2008	2172	dead-builder.exe	42
PID 2172 wrote to memory of 2008	2172	dead-builder.exe	42
PID 2172 wrote to memory of 2920	2172	dead-builder.exe	44
PID 2172 wrote to memory of 2920	2172	dead-builder.exe	44
PID 2172 wrote to memory of 2920	2172	dead-builder.exe	44
PID 2172 wrote to memory of 2956	2172	dead-builder.exe	46
PID 2172 wrote to memory of 2956	2172	dead-builder.exe	46
PID 2172 wrote to memory of 2956	2172	dead-builder.exe	46
PID 2172 wrote to memory of 1992	2172	dead-builder.exe	48
PID 2172 wrote to memory of 1992	2172	dead-builder.exe	48
PID 2172 wrote to memory of 1992	2172	dead-builder.exe	48
PID 2172 wrote to memory of 2068	2172	dead-builder.exe	50
PID 2172 wrote to memory of 2068	2172	dead-builder.exe	50
PID 2172 wrote to memory of 2068	2172	dead-builder.exe	50
PID 2172 wrote to memory of 3016	2172	dead-builder.exe	52
PID 2172 wrote to memory of 3016	2172	dead-builder.exe	52
PID 2172 wrote to memory of 3016	2172	dead-builder.exe	52
PID 3016 wrote to memory of 2272	3016	cmd.exe	54
PID 3016 wrote to memory of 2272	3016	cmd.exe	54
PID 3016 wrote to memory of 2272	3016	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2736	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:2172
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1636
- 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:2736
- 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:2840
- 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:2664
- 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:2704
- 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:1012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2008
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2956
- 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:1992
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2068
- 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:3016
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2272

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
2ca3b36978c486cfefec06244dcc6ba6

SHA1
e72f28c108d97d99cfff27246a9fe6dc8cea9f8a

SHA256
93e4fe624ca241fe9203510ab2eca7156b2d55f53bbf628afafea8962b5a1956

SHA512
1b0c226323f32a8006c0bafec6bf5e7fc4e390dc559887bf8a4d20bdecf54020f8a28759790b0e2503ef5bdb067ea6a025df73e173208c58ba671328eb706513

Download Submit
memory/1992-43-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/2172-0-0x000007FEF5F03000-0x000007FEF5F04000-memory.dmp

Filesize
4KB

Download
memory/2172-1-0x0000000000870000-0x00000000008B6000-memory.dmp

Filesize
280KB

Download
memory/2172-2-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

Filesize
9.9MB

Download
memory/2172-47-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

Filesize
9.9MB

Download
memory/2664-14-0x000000001B320000-0x000000001B602000-memory.dmp

Filesize
2.9MB

Download
memory/2664-15-0x00000000024E0000-0x00000000024E8000-memory.dmp

Filesize
32KB

Download
memory/2840-7-0x000000001B300000-0x000000001B5E2000-memory.dmp

Filesize
2.9MB

Download
memory/2840-8-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download