umbral | 1b9385d02d7257137ac792f32b3109b02a01c720de368c1f334ec8f54638f795

Analysis

max time kernel
145s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10/08/2024, 04:39

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General

Target
Dead Stealer/dead-builder.exe
Size 254KB
Sample240810-facnaszfpc
SHA256 4fec5552f2a39ddd4bdcfd316ac96ecf9f6a413fb3a674d058d1695b88c8db5f
MD5 a57179fa58b196077b35da7eb4032a18
SHA1 92a6d5ac92fe534fa1c5cdb45bc95135ef3effad
SHA512 d66f89a6f1b76e64de7f163a9cf4c31b1fcd2b1129800c1659f50d2a23e67e93820f64624ebacd25eeee193fee6e96a849f42687f5b4be9bdf8cab53f7ef31d7
SSDEEP 6144:K4oZoAeVHPtHgTIAaZgCwDx7axHU0unC28ejI8x7:xoZyHPvWCwjXCsIM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1964-1-0x00000207035B0000-0x00000207035F6000-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
2296	powershell.exe
2936	powershell.exe
1416	powershell.exe
1660	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

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
33	discord.com
34	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
8	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
2204	cmd.exe
972	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
940	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
972	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1964	dead-builder.exe
2296	powershell.exe
2296	powershell.exe
2936	powershell.exe
2936	powershell.exe
1416	powershell.exe
1416	powershell.exe
4804	powershell.exe
4804	powershell.exe
1660	powershell.exe
1660	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1964	dead-builder.exe
Token: SeIncreaseQuotaPrivilege	4656	wmic.exe
Token: SeSecurityPrivilege	4656	wmic.exe
Token: SeTakeOwnershipPrivilege	4656	wmic.exe
Token: SeLoadDriverPrivilege	4656	wmic.exe
Token: SeSystemProfilePrivilege	4656	wmic.exe
Token: SeSystemtimePrivilege	4656	wmic.exe
Token: SeProfSingleProcessPrivilege	4656	wmic.exe
Token: SeIncBasePriorityPrivilege	4656	wmic.exe
Token: SeCreatePagefilePrivilege	4656	wmic.exe
Token: SeBackupPrivilege	4656	wmic.exe
Token: SeRestorePrivilege	4656	wmic.exe
Token: SeShutdownPrivilege	4656	wmic.exe
Token: SeDebugPrivilege	4656	wmic.exe
Token: SeSystemEnvironmentPrivilege	4656	wmic.exe
Token: SeRemoteShutdownPrivilege	4656	wmic.exe
Token: SeUndockPrivilege	4656	wmic.exe
Token: SeManageVolumePrivilege	4656	wmic.exe
Token: 33	4656	wmic.exe
Token: 34	4656	wmic.exe
Token: 35	4656	wmic.exe
Token: 36	4656	wmic.exe
Token: SeIncreaseQuotaPrivilege	4656	wmic.exe
Token: SeSecurityPrivilege	4656	wmic.exe
Token: SeTakeOwnershipPrivilege	4656	wmic.exe
Token: SeLoadDriverPrivilege	4656	wmic.exe
Token: SeSystemProfilePrivilege	4656	wmic.exe
Token: SeSystemtimePrivilege	4656	wmic.exe
Token: SeProfSingleProcessPrivilege	4656	wmic.exe
Token: SeIncBasePriorityPrivilege	4656	wmic.exe
Token: SeCreatePagefilePrivilege	4656	wmic.exe
Token: SeBackupPrivilege	4656	wmic.exe
Token: SeRestorePrivilege	4656	wmic.exe
Token: SeShutdownPrivilege	4656	wmic.exe
Token: SeDebugPrivilege	4656	wmic.exe
Token: SeSystemEnvironmentPrivilege	4656	wmic.exe
Token: SeRemoteShutdownPrivilege	4656	wmic.exe
Token: SeUndockPrivilege	4656	wmic.exe
Token: SeManageVolumePrivilege	4656	wmic.exe
Token: 33	4656	wmic.exe
Token: 34	4656	wmic.exe
Token: 35	4656	wmic.exe
Token: 36	4656	wmic.exe
Token: SeDebugPrivilege	2296	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	1416	powershell.exe
Token: SeDebugPrivilege	4804	powershell.exe
Token: SeIncreaseQuotaPrivilege	4120	wmic.exe
Token: SeSecurityPrivilege	4120	wmic.exe
Token: SeTakeOwnershipPrivilege	4120	wmic.exe
Token: SeLoadDriverPrivilege	4120	wmic.exe
Token: SeSystemProfilePrivilege	4120	wmic.exe
Token: SeSystemtimePrivilege	4120	wmic.exe
Token: SeProfSingleProcessPrivilege	4120	wmic.exe
Token: SeIncBasePriorityPrivilege	4120	wmic.exe
Token: SeCreatePagefilePrivilege	4120	wmic.exe
Token: SeBackupPrivilege	4120	wmic.exe
Token: SeRestorePrivilege	4120	wmic.exe
Token: SeShutdownPrivilege	4120	wmic.exe
Token: SeDebugPrivilege	4120	wmic.exe
Token: SeSystemEnvironmentPrivilege	4120	wmic.exe
Token: SeRemoteShutdownPrivilege	4120	wmic.exe
Token: SeUndockPrivilege	4120	wmic.exe
Token: SeManageVolumePrivilege	4120	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 4656	1964	dead-builder.exe	85
PID 1964 wrote to memory of 4656	1964	dead-builder.exe	85
PID 1964 wrote to memory of 632	1964	dead-builder.exe	89
PID 1964 wrote to memory of 632	1964	dead-builder.exe	89
PID 1964 wrote to memory of 2296	1964	dead-builder.exe	91
PID 1964 wrote to memory of 2296	1964	dead-builder.exe	91
PID 1964 wrote to memory of 2936	1964	dead-builder.exe	93
PID 1964 wrote to memory of 2936	1964	dead-builder.exe	93
PID 1964 wrote to memory of 1416	1964	dead-builder.exe	95
PID 1964 wrote to memory of 1416	1964	dead-builder.exe	95
PID 1964 wrote to memory of 4804	1964	dead-builder.exe	97
PID 1964 wrote to memory of 4804	1964	dead-builder.exe	97
PID 1964 wrote to memory of 4120	1964	dead-builder.exe	99
PID 1964 wrote to memory of 4120	1964	dead-builder.exe	99
PID 1964 wrote to memory of 1848	1964	dead-builder.exe	102
PID 1964 wrote to memory of 1848	1964	dead-builder.exe	102
PID 1964 wrote to memory of 4052	1964	dead-builder.exe	104
PID 1964 wrote to memory of 4052	1964	dead-builder.exe	104
PID 1964 wrote to memory of 1660	1964	dead-builder.exe	106
PID 1964 wrote to memory of 1660	1964	dead-builder.exe	106
PID 1964 wrote to memory of 940	1964	dead-builder.exe	110
PID 1964 wrote to memory of 940	1964	dead-builder.exe	110
PID 1964 wrote to memory of 2204	1964	dead-builder.exe	113
PID 1964 wrote to memory of 2204	1964	dead-builder.exe	113
PID 2204 wrote to memory of 972	2204	cmd.exe	115
PID 2204 wrote to memory of 972	2204	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
632	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:1964
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4656
- 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:632
- 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:2296
- 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:2936
- 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:1416
- 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:4804
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4120
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4052
- 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:1660
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:940
- 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⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2204
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:972

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba
MD5 966914e2e771de7a4a57a95b6ecfa8a9
SHA1 7a32282fd51dd032967ed4d9a40cc57e265aeff2
SHA512 dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc
MD5 548dd08570d121a65e82abb7171cae1c
SHA1 1a1b5084b3a78f3acd0d811cc79dbcac121217ab
SHA512 37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce
MD5 45ad40f012b09e141955482368549640
SHA1 3f9cd15875c1e397c3b2b5592805577ae88a96cb
SHA512 3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_z1rbgxui.0tl.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_z1rbgxui.0tl.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/1964-71-0x00000207053A0000-0x00000207053AA000-memory.dmp

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memory/1964-35-0x0000020705360000-0x000002070537E000-memory.dmp

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memory/1964-90-0x00007FFAA78B0000-0x00007FFAA8371000-memory.dmp

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memory/1964-72-0x000002071DDB0000-0x000002071DDC2000-memory.dmp

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memory/1964-2-0x00007FFAA78B0000-0x00007FFAA8371000-memory.dmp

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memory/1964-33-0x000002071DD10000-0x000002071DD86000-memory.dmp

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memory/1964-34-0x00000207053B0000-0x0000020705400000-memory.dmp

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memory/1964-0-0x00007FFAA78B3000-0x00007FFAA78B5000-memory.dmp

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memory/1964-1-0x00000207035B0000-0x00000207035F6000-memory.dmp

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memory/2296-15-0x00007FFAA78B0000-0x00007FFAA8371000-memory.dmp

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memory/2296-10-0x00007FFAA78B0000-0x00007FFAA8371000-memory.dmp

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memory/2296-9-0x00007FFAA78B0000-0x00007FFAA8371000-memory.dmp

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memory/2296-8-0x0000024927D30000-0x0000024927D52000-memory.dmp

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memory/2296-18-0x00007FFAA78B0000-0x00007FFAA8371000-memory.dmp

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