umbral | 96622bdc957b5aba6687cdc3de23737ed4775cd49f7be43ead103c40c8b68160

Analysis

max time kernel
135s
max time network
104s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
12-05-2024 19:10

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General

Target

STEALER4000PRO.exe
Size

229KB
MD5

bbc777f07f2779e1c776fff6afd594c0
SHA1

fc2b7e80ec86b55dcff0f2026fee001c96ae1817
SHA256

96622bdc957b5aba6687cdc3de23737ed4775cd49f7be43ead103c40c8b68160
SHA512

939809ffd348eb0785e49c23470a2678ab8385d015aa0aab60bdde4a15f8f5cc647bdf8a387d3547a124736a5265b0502d9d55cec4c4c50af547778480aa3f3d
SSDEEP

6144:FloZMCrIkd8g+EtXHkv/iD44QjxM+8D/0aVA+Pv+Gfb8e1m8ti:HoZRL+EP8TjxM+8D/0aVA+Pv+k7k

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1456-1-0x0000017721120000-0x0000017721160000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1328	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	STEALER4000PRO.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
31	discord.com
32	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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2632	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4536	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1328	powershell.exe
1328	powershell.exe
2212	powershell.exe
2212	powershell.exe
4252	powershell.exe
4252	powershell.exe
5012	powershell.exe
5012	powershell.exe
2376	powershell.exe
2376	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1456	STEALER4000PRO.exe
Token: SeDebugPrivilege	1328	powershell.exe
Token: SeDebugPrivilege	2212	powershell.exe
Token: SeDebugPrivilege	4252	powershell.exe
Token: SeDebugPrivilege	5012	powershell.exe
Token: SeIncreaseQuotaPrivilege	452	wmic.exe
Token: SeSecurityPrivilege	452	wmic.exe
Token: SeTakeOwnershipPrivilege	452	wmic.exe
Token: SeLoadDriverPrivilege	452	wmic.exe
Token: SeSystemProfilePrivilege	452	wmic.exe
Token: SeSystemtimePrivilege	452	wmic.exe
Token: SeProfSingleProcessPrivilege	452	wmic.exe
Token: SeIncBasePriorityPrivilege	452	wmic.exe
Token: SeCreatePagefilePrivilege	452	wmic.exe
Token: SeBackupPrivilege	452	wmic.exe
Token: SeRestorePrivilege	452	wmic.exe
Token: SeShutdownPrivilege	452	wmic.exe
Token: SeDebugPrivilege	452	wmic.exe
Token: SeSystemEnvironmentPrivilege	452	wmic.exe
Token: SeRemoteShutdownPrivilege	452	wmic.exe
Token: SeUndockPrivilege	452	wmic.exe
Token: SeManageVolumePrivilege	452	wmic.exe
Token: 33	452	wmic.exe
Token: 34	452	wmic.exe
Token: 35	452	wmic.exe
Token: 36	452	wmic.exe
Token: SeIncreaseQuotaPrivilege	452	wmic.exe
Token: SeSecurityPrivilege	452	wmic.exe
Token: SeTakeOwnershipPrivilege	452	wmic.exe
Token: SeLoadDriverPrivilege	452	wmic.exe
Token: SeSystemProfilePrivilege	452	wmic.exe
Token: SeSystemtimePrivilege	452	wmic.exe
Token: SeProfSingleProcessPrivilege	452	wmic.exe
Token: SeIncBasePriorityPrivilege	452	wmic.exe
Token: SeCreatePagefilePrivilege	452	wmic.exe
Token: SeBackupPrivilege	452	wmic.exe
Token: SeRestorePrivilege	452	wmic.exe
Token: SeShutdownPrivilege	452	wmic.exe
Token: SeDebugPrivilege	452	wmic.exe
Token: SeSystemEnvironmentPrivilege	452	wmic.exe
Token: SeRemoteShutdownPrivilege	452	wmic.exe
Token: SeUndockPrivilege	452	wmic.exe
Token: SeManageVolumePrivilege	452	wmic.exe
Token: 33	452	wmic.exe
Token: 34	452	wmic.exe
Token: 35	452	wmic.exe
Token: 36	452	wmic.exe
Token: SeIncreaseQuotaPrivilege	320	wmic.exe
Token: SeSecurityPrivilege	320	wmic.exe
Token: SeTakeOwnershipPrivilege	320	wmic.exe
Token: SeLoadDriverPrivilege	320	wmic.exe
Token: SeSystemProfilePrivilege	320	wmic.exe
Token: SeSystemtimePrivilege	320	wmic.exe
Token: SeProfSingleProcessPrivilege	320	wmic.exe
Token: SeIncBasePriorityPrivilege	320	wmic.exe
Token: SeCreatePagefilePrivilege	320	wmic.exe
Token: SeBackupPrivilege	320	wmic.exe
Token: SeRestorePrivilege	320	wmic.exe
Token: SeShutdownPrivilege	320	wmic.exe
Token: SeDebugPrivilege	320	wmic.exe
Token: SeSystemEnvironmentPrivilege	320	wmic.exe
Token: SeRemoteShutdownPrivilege	320	wmic.exe
Token: SeUndockPrivilege	320	wmic.exe
Token: SeManageVolumePrivilege	320	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1456 wrote to memory of 2948	1456	STEALER4000PRO.exe	85
PID 1456 wrote to memory of 2948	1456	STEALER4000PRO.exe	85
PID 1456 wrote to memory of 1328	1456	STEALER4000PRO.exe	87
PID 1456 wrote to memory of 1328	1456	STEALER4000PRO.exe	87
PID 1456 wrote to memory of 2212	1456	STEALER4000PRO.exe	89
PID 1456 wrote to memory of 2212	1456	STEALER4000PRO.exe	89
PID 1456 wrote to memory of 4252	1456	STEALER4000PRO.exe	91
PID 1456 wrote to memory of 4252	1456	STEALER4000PRO.exe	91
PID 1456 wrote to memory of 5012	1456	STEALER4000PRO.exe	93
PID 1456 wrote to memory of 5012	1456	STEALER4000PRO.exe	93
PID 1456 wrote to memory of 452	1456	STEALER4000PRO.exe	95
PID 1456 wrote to memory of 452	1456	STEALER4000PRO.exe	95
PID 1456 wrote to memory of 320	1456	STEALER4000PRO.exe	98
PID 1456 wrote to memory of 320	1456	STEALER4000PRO.exe	98
PID 1456 wrote to memory of 3652	1456	STEALER4000PRO.exe	100
PID 1456 wrote to memory of 3652	1456	STEALER4000PRO.exe	100
PID 1456 wrote to memory of 2376	1456	STEALER4000PRO.exe	102
PID 1456 wrote to memory of 2376	1456	STEALER4000PRO.exe	102
PID 1456 wrote to memory of 2632	1456	STEALER4000PRO.exe	104
PID 1456 wrote to memory of 2632	1456	STEALER4000PRO.exe	104
PID 1456 wrote to memory of 1012	1456	STEALER4000PRO.exe	113
PID 1456 wrote to memory of 1012	1456	STEALER4000PRO.exe	113
PID 1012 wrote to memory of 4536	1012	cmd.exe	115
PID 1012 wrote to memory of 4536	1012	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2948	attrib.exe

C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe
"C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1456
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe"
  2⤵
  - Views/modifies file attributes
  PID:2948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1328
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2212
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4252
- 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:5012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:452
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:320
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3652
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2632
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\STEALER4000PRO.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1012
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4536

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
1a58f982c18490e622e00d4eb75ace5a

SHA1
60c30527b74659ecf09089a5a7c02a1df9a71b65

SHA256
4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

SHA512
ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
d8a781a8d47e148c742681deaa63ac8d

SHA1
49594c22cc6183605b96b715a0c00c1bf1bbb468

SHA256
994622f9d048bce32fd23dec62a532b965883a169722f36ce72a639e29b8303c

SHA512
f32989be9a903764c4ed3b8ab4e61a677ca4d37031200530164d192c25c269143cb127a73380ea0d88ac81f1a3a7c141d77fbd74c211c9d969bf2af9202e7fbe

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2jf00meg.tlc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1328-3-0x000001F2E41C0000-0x000001F2E41E2000-memory.dmp

Filesize
136KB

Download
memory/1328-13-0x00007FFF37220000-0x00007FFF37CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1328-14-0x00007FFF37220000-0x00007FFF37CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1328-15-0x00007FFF37220000-0x00007FFF37CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1328-18-0x00007FFF37220000-0x00007FFF37CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1456-34-0x000001773B8D0000-0x000001773B920000-memory.dmp

Filesize
320KB

Download
memory/1456-33-0x000001773B850000-0x000001773B8C6000-memory.dmp

Filesize
472KB

Download
memory/1456-35-0x000001773B7E0000-0x000001773B7FE000-memory.dmp

Filesize
120KB

Download
memory/1456-0-0x00007FFF37223000-0x00007FFF37225000-memory.dmp

Filesize
8KB

Download
memory/1456-1-0x0000017721120000-0x0000017721160000-memory.dmp

Filesize
256KB

Download
memory/1456-72-0x000001773BA20000-0x000001773BA32000-memory.dmp

Filesize
72KB

Download
memory/1456-71-0x000001773B810000-0x000001773B81A000-memory.dmp

Filesize
40KB

Download
memory/1456-2-0x00007FFF37220000-0x00007FFF37CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1456-90-0x00007FFF37220000-0x00007FFF37CE1000-memory.dmp

Filesize
10.8MB

Download