umbral | d97cfbdcbd68d0080286dde7cb1906e84c954d5471f08ba98608c5f3b6af3f2d

Analysis

max time kernel
501s
max time network
427s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-08-2024 04:14

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General

Target

Umbral.exe
Size

230KB
MD5

553d6d65dbaee07e841b22b0987c0331
SHA1

499325af4eb554638411e3e47b146cc8662f693a
SHA256

d97cfbdcbd68d0080286dde7cb1906e84c954d5471f08ba98608c5f3b6af3f2d
SHA512

e4b3c0b1211ce292eb7a781e98da5960936e28abd84f473c66105217e9de505f89fee1b46ac776953403d0aa433d47226c3f0b6dbfd5dd3cc7b4a44058964e96
SSDEEP

6144:dloZM+rIkd8g+EtXHkv/iD4mEHhtxds8e1minfi:/oZtL+EP8Trx86

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3812-1-0x0000018C02420000-0x0000018C02460000-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
4372	powershell.exe
3152	powershell.exe
1932	powershell.exe
400	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
37	discord.com
38	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

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
2244	cmd.exe
4520	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2988	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4520	PING.EXE

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3812	Umbral.exe
4372	powershell.exe
4372	powershell.exe
400	powershell.exe
400	powershell.exe
3152	powershell.exe
3152	powershell.exe
212	powershell.exe
212	powershell.exe
1932	powershell.exe
1932	powershell.exe
1932	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3812	Umbral.exe
Token: SeIncreaseQuotaPrivilege	5056	wmic.exe
Token: SeSecurityPrivilege	5056	wmic.exe
Token: SeTakeOwnershipPrivilege	5056	wmic.exe
Token: SeLoadDriverPrivilege	5056	wmic.exe
Token: SeSystemProfilePrivilege	5056	wmic.exe
Token: SeSystemtimePrivilege	5056	wmic.exe
Token: SeProfSingleProcessPrivilege	5056	wmic.exe
Token: SeIncBasePriorityPrivilege	5056	wmic.exe
Token: SeCreatePagefilePrivilege	5056	wmic.exe
Token: SeBackupPrivilege	5056	wmic.exe
Token: SeRestorePrivilege	5056	wmic.exe
Token: SeShutdownPrivilege	5056	wmic.exe
Token: SeDebugPrivilege	5056	wmic.exe
Token: SeSystemEnvironmentPrivilege	5056	wmic.exe
Token: SeRemoteShutdownPrivilege	5056	wmic.exe
Token: SeUndockPrivilege	5056	wmic.exe
Token: SeManageVolumePrivilege	5056	wmic.exe
Token: 33	5056	wmic.exe
Token: 34	5056	wmic.exe
Token: 35	5056	wmic.exe
Token: 36	5056	wmic.exe
Token: SeIncreaseQuotaPrivilege	5056	wmic.exe
Token: SeSecurityPrivilege	5056	wmic.exe
Token: SeTakeOwnershipPrivilege	5056	wmic.exe
Token: SeLoadDriverPrivilege	5056	wmic.exe
Token: SeSystemProfilePrivilege	5056	wmic.exe
Token: SeSystemtimePrivilege	5056	wmic.exe
Token: SeProfSingleProcessPrivilege	5056	wmic.exe
Token: SeIncBasePriorityPrivilege	5056	wmic.exe
Token: SeCreatePagefilePrivilege	5056	wmic.exe
Token: SeBackupPrivilege	5056	wmic.exe
Token: SeRestorePrivilege	5056	wmic.exe
Token: SeShutdownPrivilege	5056	wmic.exe
Token: SeDebugPrivilege	5056	wmic.exe
Token: SeSystemEnvironmentPrivilege	5056	wmic.exe
Token: SeRemoteShutdownPrivilege	5056	wmic.exe
Token: SeUndockPrivilege	5056	wmic.exe
Token: SeManageVolumePrivilege	5056	wmic.exe
Token: 33	5056	wmic.exe
Token: 34	5056	wmic.exe
Token: 35	5056	wmic.exe
Token: 36	5056	wmic.exe
Token: SeDebugPrivilege	4372	powershell.exe
Token: SeDebugPrivilege	400	powershell.exe
Token: SeDebugPrivilege	3152	powershell.exe
Token: SeDebugPrivilege	212	powershell.exe
Token: SeIncreaseQuotaPrivilege	1648	wmic.exe
Token: SeSecurityPrivilege	1648	wmic.exe
Token: SeTakeOwnershipPrivilege	1648	wmic.exe
Token: SeLoadDriverPrivilege	1648	wmic.exe
Token: SeSystemProfilePrivilege	1648	wmic.exe
Token: SeSystemtimePrivilege	1648	wmic.exe
Token: SeProfSingleProcessPrivilege	1648	wmic.exe
Token: SeIncBasePriorityPrivilege	1648	wmic.exe
Token: SeCreatePagefilePrivilege	1648	wmic.exe
Token: SeBackupPrivilege	1648	wmic.exe
Token: SeRestorePrivilege	1648	wmic.exe
Token: SeShutdownPrivilege	1648	wmic.exe
Token: SeDebugPrivilege	1648	wmic.exe
Token: SeSystemEnvironmentPrivilege	1648	wmic.exe
Token: SeRemoteShutdownPrivilege	1648	wmic.exe
Token: SeUndockPrivilege	1648	wmic.exe
Token: SeManageVolumePrivilege	1648	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3812 wrote to memory of 5056	3812	Umbral.exe	89
PID 3812 wrote to memory of 5056	3812	Umbral.exe	89
PID 3812 wrote to memory of 4384	3812	Umbral.exe	92
PID 3812 wrote to memory of 4384	3812	Umbral.exe	92
PID 3812 wrote to memory of 4372	3812	Umbral.exe	94
PID 3812 wrote to memory of 4372	3812	Umbral.exe	94
PID 3812 wrote to memory of 400	3812	Umbral.exe	97
PID 3812 wrote to memory of 400	3812	Umbral.exe	97
PID 3812 wrote to memory of 3152	3812	Umbral.exe	99
PID 3812 wrote to memory of 3152	3812	Umbral.exe	99
PID 3812 wrote to memory of 212	3812	Umbral.exe	101
PID 3812 wrote to memory of 212	3812	Umbral.exe	101
PID 3812 wrote to memory of 1648	3812	Umbral.exe	105
PID 3812 wrote to memory of 1648	3812	Umbral.exe	105
PID 3812 wrote to memory of 1840	3812	Umbral.exe	107
PID 3812 wrote to memory of 1840	3812	Umbral.exe	107
PID 3812 wrote to memory of 3120	3812	Umbral.exe	110
PID 3812 wrote to memory of 3120	3812	Umbral.exe	110
PID 3812 wrote to memory of 1932	3812	Umbral.exe	112
PID 3812 wrote to memory of 1932	3812	Umbral.exe	112
PID 3812 wrote to memory of 2988	3812	Umbral.exe	114
PID 3812 wrote to memory of 2988	3812	Umbral.exe	114
PID 3812 wrote to memory of 2244	3812	Umbral.exe	117
PID 3812 wrote to memory of 2244	3812	Umbral.exe	117
PID 2244 wrote to memory of 4520	2244	cmd.exe	119
PID 2244 wrote to memory of 4520	2244	cmd.exe	119

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4384	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:3812
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5056
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4384
- 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:4372
- 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:400
- 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:3152
- 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:212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1648
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1840
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3120
- 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:1932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2988
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4520

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\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
47aec0ae6e0dfab5f91c35cd65d2c56a

SHA1
0bbe13618bdc0c402539cdfca81471aa501f5cad

SHA256
8f31385012b247db2cc50ecb164208fbbf5f8cdf7bfc951e8c2c8ad5fb04cf0b

SHA512
c4b7184a85c1d594012ba86390e651439d6cae63c76b94432faaaea410e4ef9bc62d88e68adf8f3abbe36e18ef9e4dc46c3e31a0d72089f98a22f04c8b4a8f12

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_xrlxj0h1.puz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3812-71-0x0000018C1CB00000-0x0000018C1CB0A000-memory.dmp

Filesize
40KB

Download
memory/3812-35-0x0000018C041A0000-0x0000018C041BE000-memory.dmp

Filesize
120KB

Download
memory/3812-92-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download
memory/3812-88-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download
memory/3812-2-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download
memory/3812-33-0x0000018C1CB80000-0x0000018C1CBF6000-memory.dmp

Filesize
472KB

Download
memory/3812-34-0x0000018C1CC00000-0x0000018C1CC50000-memory.dmp

Filesize
320KB

Download
memory/3812-87-0x00007FFE505C3000-0x00007FFE505C5000-memory.dmp

Filesize
8KB

Download
memory/3812-1-0x0000018C02420000-0x0000018C02460000-memory.dmp

Filesize
256KB

Download
memory/3812-0-0x00007FFE505C3000-0x00007FFE505C5000-memory.dmp

Filesize
8KB

Download
memory/3812-72-0x0000018C1CB40000-0x0000018C1CB52000-memory.dmp

Filesize
72KB

Download
memory/4372-4-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download
memory/4372-10-0x0000027147F60000-0x0000027147F82000-memory.dmp

Filesize
136KB

Download
memory/4372-15-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download
memory/4372-3-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download
memory/4372-18-0x00007FFE505C0000-0x00007FFE51081000-memory.dmp

Filesize
10.8MB

Download