umbral | 628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6

Analysis

max time kernel
138s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
06-05-2024 12:00

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General

Target

Umbral.exe
Size

232KB
MD5

afbe250f9d941daf1fc895e29d0b2821
SHA1

9aeaa55efa56702a0c2694ff2de3a5c6df7b03ac
SHA256

628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6
SHA512

177ddc51032af306d32c0826efddfa3be5e68621b440be764fba7ad37fd982fb58d7e902e4eb258fe50bbd236f82457e45e7d12a885c78314b304e72fb0f2c94
SSDEEP

6144:tloZMDXU9Zx0kt8X0/PSCsMpwpf3tW+x5R0STTKN0b8e1mKISi:voZnf0kkPQwpf3tW+x5R0STTKm2

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral3/memory/3492-0-0x0000027C430D0000-0x0000027C43110000-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
4400	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

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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5020	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2012	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3492	Umbral.exe
4400	powershell.exe
4400	powershell.exe
452	powershell.exe
452	powershell.exe
3324	powershell.exe
3324	powershell.exe
3016	powershell.exe
3016	powershell.exe
4972	powershell.exe
4972	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3492	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1164	wmic.exe
Token: SeSecurityPrivilege	1164	wmic.exe
Token: SeTakeOwnershipPrivilege	1164	wmic.exe
Token: SeLoadDriverPrivilege	1164	wmic.exe
Token: SeSystemProfilePrivilege	1164	wmic.exe
Token: SeSystemtimePrivilege	1164	wmic.exe
Token: SeProfSingleProcessPrivilege	1164	wmic.exe
Token: SeIncBasePriorityPrivilege	1164	wmic.exe
Token: SeCreatePagefilePrivilege	1164	wmic.exe
Token: SeBackupPrivilege	1164	wmic.exe
Token: SeRestorePrivilege	1164	wmic.exe
Token: SeShutdownPrivilege	1164	wmic.exe
Token: SeDebugPrivilege	1164	wmic.exe
Token: SeSystemEnvironmentPrivilege	1164	wmic.exe
Token: SeRemoteShutdownPrivilege	1164	wmic.exe
Token: SeUndockPrivilege	1164	wmic.exe
Token: SeManageVolumePrivilege	1164	wmic.exe
Token: 33	1164	wmic.exe
Token: 34	1164	wmic.exe
Token: 35	1164	wmic.exe
Token: 36	1164	wmic.exe
Token: SeIncreaseQuotaPrivilege	1164	wmic.exe
Token: SeSecurityPrivilege	1164	wmic.exe
Token: SeTakeOwnershipPrivilege	1164	wmic.exe
Token: SeLoadDriverPrivilege	1164	wmic.exe
Token: SeSystemProfilePrivilege	1164	wmic.exe
Token: SeSystemtimePrivilege	1164	wmic.exe
Token: SeProfSingleProcessPrivilege	1164	wmic.exe
Token: SeIncBasePriorityPrivilege	1164	wmic.exe
Token: SeCreatePagefilePrivilege	1164	wmic.exe
Token: SeBackupPrivilege	1164	wmic.exe
Token: SeRestorePrivilege	1164	wmic.exe
Token: SeShutdownPrivilege	1164	wmic.exe
Token: SeDebugPrivilege	1164	wmic.exe
Token: SeSystemEnvironmentPrivilege	1164	wmic.exe
Token: SeRemoteShutdownPrivilege	1164	wmic.exe
Token: SeUndockPrivilege	1164	wmic.exe
Token: SeManageVolumePrivilege	1164	wmic.exe
Token: 33	1164	wmic.exe
Token: 34	1164	wmic.exe
Token: 35	1164	wmic.exe
Token: 36	1164	wmic.exe
Token: SeDebugPrivilege	4400	powershell.exe
Token: SeDebugPrivilege	452	powershell.exe
Token: SeDebugPrivilege	3324	powershell.exe
Token: SeDebugPrivilege	3016	powershell.exe
Token: SeIncreaseQuotaPrivilege	4476	wmic.exe
Token: SeSecurityPrivilege	4476	wmic.exe
Token: SeTakeOwnershipPrivilege	4476	wmic.exe
Token: SeLoadDriverPrivilege	4476	wmic.exe
Token: SeSystemProfilePrivilege	4476	wmic.exe
Token: SeSystemtimePrivilege	4476	wmic.exe
Token: SeProfSingleProcessPrivilege	4476	wmic.exe
Token: SeIncBasePriorityPrivilege	4476	wmic.exe
Token: SeCreatePagefilePrivilege	4476	wmic.exe
Token: SeBackupPrivilege	4476	wmic.exe
Token: SeRestorePrivilege	4476	wmic.exe
Token: SeShutdownPrivilege	4476	wmic.exe
Token: SeDebugPrivilege	4476	wmic.exe
Token: SeSystemEnvironmentPrivilege	4476	wmic.exe
Token: SeRemoteShutdownPrivilege	4476	wmic.exe
Token: SeUndockPrivilege	4476	wmic.exe
Token: SeManageVolumePrivilege	4476	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3492 wrote to memory of 1164	3492	Umbral.exe	85
PID 3492 wrote to memory of 1164	3492	Umbral.exe	85
PID 3492 wrote to memory of 1496	3492	Umbral.exe	90
PID 3492 wrote to memory of 1496	3492	Umbral.exe	90
PID 3492 wrote to memory of 4400	3492	Umbral.exe	92
PID 3492 wrote to memory of 4400	3492	Umbral.exe	92
PID 3492 wrote to memory of 452	3492	Umbral.exe	95
PID 3492 wrote to memory of 452	3492	Umbral.exe	95
PID 3492 wrote to memory of 3324	3492	Umbral.exe	97
PID 3492 wrote to memory of 3324	3492	Umbral.exe	97
PID 3492 wrote to memory of 3016	3492	Umbral.exe	99
PID 3492 wrote to memory of 3016	3492	Umbral.exe	99
PID 3492 wrote to memory of 4476	3492	Umbral.exe	103
PID 3492 wrote to memory of 4476	3492	Umbral.exe	103
PID 3492 wrote to memory of 64	3492	Umbral.exe	105
PID 3492 wrote to memory of 64	3492	Umbral.exe	105
PID 3492 wrote to memory of 1580	3492	Umbral.exe	107
PID 3492 wrote to memory of 1580	3492	Umbral.exe	107
PID 3492 wrote to memory of 4972	3492	Umbral.exe	109
PID 3492 wrote to memory of 4972	3492	Umbral.exe	109
PID 3492 wrote to memory of 5020	3492	Umbral.exe	111
PID 3492 wrote to memory of 5020	3492	Umbral.exe	111
PID 3492 wrote to memory of 4948	3492	Umbral.exe	114
PID 3492 wrote to memory of 4948	3492	Umbral.exe	114
PID 4948 wrote to memory of 2012	4948	cmd.exe	116
PID 4948 wrote to memory of 2012	4948	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1496	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1164
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1496
- 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:4400
- 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:452
- 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:3324
- 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:3016
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:64
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1580
- 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:4972
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5020
- 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:4948
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2012

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

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
2b566ffd6de9e256d318da539ea226be

SHA1
5687791670b1391754d5c4d80e520cf7e3edd3db

SHA256
c292acf9fdd61c1cc21b4e3139b32b20b878b7094e7b30fc9d255f0bf60059ef

SHA512
3d76037af1080d099ef0037d1e49a40c883e452bb2e4d8f528d5f824142189ea92faa03488cadee2b30ec9b3a8283935a8b3c26e10578dd1ebbca9eda3a5ea7c

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
ec68f430dd646907595c25a337c6f032

SHA1
7fc35f368450557543feac46f3ec34cd68581811

SHA256
43b31b43ebf535cffbf983420cfc26f0cd0bb8e88b0add85383b458243a36ab5

SHA512
1ab54dd427341ca14d580736d2ec06c91abf1e1b45b5ca982f05c43c5a86a7e64684f3c3eb00f31db89f244027b450a0f5a05c9f954032c58a72f138aab05ed3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2xllruam.clt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3492-68-0x0000027C5D7C0000-0x0000027C5D7CA000-memory.dmp

Filesize
40KB

Download
memory/3492-35-0x0000027C5D790000-0x0000027C5D7AE000-memory.dmp

Filesize
120KB

Download
memory/3492-87-0x00007FF97DB40000-0x00007FF97E601000-memory.dmp

Filesize
10.8MB

Download
memory/3492-69-0x0000027C5D9E0000-0x0000027C5D9F2000-memory.dmp

Filesize
72KB

Download
memory/3492-2-0x00007FF97DB40000-0x00007FF97E601000-memory.dmp

Filesize
10.8MB

Download
memory/3492-33-0x0000027C5D810000-0x0000027C5D886000-memory.dmp

Filesize
472KB

Download
memory/3492-34-0x0000027C5D890000-0x0000027C5D8E0000-memory.dmp

Filesize
320KB

Download
memory/3492-0-0x0000027C430D0000-0x0000027C43110000-memory.dmp

Filesize
256KB

Download
memory/3492-1-0x00007FF97DB43000-0x00007FF97DB45000-memory.dmp

Filesize
8KB

Download
memory/4400-10-0x0000017A95C40000-0x0000017A95C62000-memory.dmp

Filesize
136KB

Download
memory/4400-4-0x00007FF97DB40000-0x00007FF97E601000-memory.dmp

Filesize
10.8MB

Download
memory/4400-3-0x00007FF97DB40000-0x00007FF97E601000-memory.dmp

Filesize
10.8MB

Download
memory/4400-15-0x00007FF97DB40000-0x00007FF97E601000-memory.dmp

Filesize
10.8MB

Download
memory/4400-18-0x00007FF97DB40000-0x00007FF97E601000-memory.dmp

Filesize
10.8MB

Download