umbral | 8ff6ca14eac4b42391697608e3cf0c6fe433e58ac965bef66ec32888305464d9

Analysis

max time kernel
140s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-08-2024 20:19

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General

Target

Umbral.exe
Size

232KB
MD5

b19a46354270983374d8a6c2e1de3eff
SHA1

1e0c163fd3d63d26dd3f271a3e348b3d69140c7d
SHA256

8ff6ca14eac4b42391697608e3cf0c6fe433e58ac965bef66ec32888305464d9
SHA512

829a6b6c93c5f98ac8b2633608c6d05247e8b84b9eb188ffaf69a6339019fd92772730325de9ef378812693203abe19cff289b1feb7ca8149dcbeb857d307b6d
SSDEEP

6144:BloZM+rIkd8g+EtXHkv/iD4yF4W4+ZRS23q459cTub8e1mQvi:zoZtL+EP8yF4W4+ZRS23q459cmW

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3656-1-0x000001D72AA60000-0x000001D72AAA0000-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
1360	powershell.exe
4524	powershell.exe
2104	powershell.exe
2848	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
35	discord.com
36	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
1212	cmd.exe
1040	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4940	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1040	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3656	Umbral.exe
1360	powershell.exe
1360	powershell.exe
4524	powershell.exe
4524	powershell.exe
2104	powershell.exe
2104	powershell.exe
4252	powershell.exe
4252	powershell.exe
2848	powershell.exe
2848	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3656	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2888	wmic.exe
Token: SeSecurityPrivilege	2888	wmic.exe
Token: SeTakeOwnershipPrivilege	2888	wmic.exe
Token: SeLoadDriverPrivilege	2888	wmic.exe
Token: SeSystemProfilePrivilege	2888	wmic.exe
Token: SeSystemtimePrivilege	2888	wmic.exe
Token: SeProfSingleProcessPrivilege	2888	wmic.exe
Token: SeIncBasePriorityPrivilege	2888	wmic.exe
Token: SeCreatePagefilePrivilege	2888	wmic.exe
Token: SeBackupPrivilege	2888	wmic.exe
Token: SeRestorePrivilege	2888	wmic.exe
Token: SeShutdownPrivilege	2888	wmic.exe
Token: SeDebugPrivilege	2888	wmic.exe
Token: SeSystemEnvironmentPrivilege	2888	wmic.exe
Token: SeRemoteShutdownPrivilege	2888	wmic.exe
Token: SeUndockPrivilege	2888	wmic.exe
Token: SeManageVolumePrivilege	2888	wmic.exe
Token: 33	2888	wmic.exe
Token: 34	2888	wmic.exe
Token: 35	2888	wmic.exe
Token: 36	2888	wmic.exe
Token: SeIncreaseQuotaPrivilege	2888	wmic.exe
Token: SeSecurityPrivilege	2888	wmic.exe
Token: SeTakeOwnershipPrivilege	2888	wmic.exe
Token: SeLoadDriverPrivilege	2888	wmic.exe
Token: SeSystemProfilePrivilege	2888	wmic.exe
Token: SeSystemtimePrivilege	2888	wmic.exe
Token: SeProfSingleProcessPrivilege	2888	wmic.exe
Token: SeIncBasePriorityPrivilege	2888	wmic.exe
Token: SeCreatePagefilePrivilege	2888	wmic.exe
Token: SeBackupPrivilege	2888	wmic.exe
Token: SeRestorePrivilege	2888	wmic.exe
Token: SeShutdownPrivilege	2888	wmic.exe
Token: SeDebugPrivilege	2888	wmic.exe
Token: SeSystemEnvironmentPrivilege	2888	wmic.exe
Token: SeRemoteShutdownPrivilege	2888	wmic.exe
Token: SeUndockPrivilege	2888	wmic.exe
Token: SeManageVolumePrivilege	2888	wmic.exe
Token: 33	2888	wmic.exe
Token: 34	2888	wmic.exe
Token: 35	2888	wmic.exe
Token: 36	2888	wmic.exe
Token: SeDebugPrivilege	1360	powershell.exe
Token: SeDebugPrivilege	4524	powershell.exe
Token: SeDebugPrivilege	2104	powershell.exe
Token: SeDebugPrivilege	4252	powershell.exe
Token: SeIncreaseQuotaPrivilege	1552	wmic.exe
Token: SeSecurityPrivilege	1552	wmic.exe
Token: SeTakeOwnershipPrivilege	1552	wmic.exe
Token: SeLoadDriverPrivilege	1552	wmic.exe
Token: SeSystemProfilePrivilege	1552	wmic.exe
Token: SeSystemtimePrivilege	1552	wmic.exe
Token: SeProfSingleProcessPrivilege	1552	wmic.exe
Token: SeIncBasePriorityPrivilege	1552	wmic.exe
Token: SeCreatePagefilePrivilege	1552	wmic.exe
Token: SeBackupPrivilege	1552	wmic.exe
Token: SeRestorePrivilege	1552	wmic.exe
Token: SeShutdownPrivilege	1552	wmic.exe
Token: SeDebugPrivilege	1552	wmic.exe
Token: SeSystemEnvironmentPrivilege	1552	wmic.exe
Token: SeRemoteShutdownPrivilege	1552	wmic.exe
Token: SeUndockPrivilege	1552	wmic.exe
Token: SeManageVolumePrivilege	1552	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3656 wrote to memory of 2888	3656	Umbral.exe	86
PID 3656 wrote to memory of 2888	3656	Umbral.exe	86
PID 3656 wrote to memory of 5000	3656	Umbral.exe	90
PID 3656 wrote to memory of 5000	3656	Umbral.exe	90
PID 3656 wrote to memory of 1360	3656	Umbral.exe	92
PID 3656 wrote to memory of 1360	3656	Umbral.exe	92
PID 3656 wrote to memory of 4524	3656	Umbral.exe	94
PID 3656 wrote to memory of 4524	3656	Umbral.exe	94
PID 3656 wrote to memory of 2104	3656	Umbral.exe	96
PID 3656 wrote to memory of 2104	3656	Umbral.exe	96
PID 3656 wrote to memory of 4252	3656	Umbral.exe	98
PID 3656 wrote to memory of 4252	3656	Umbral.exe	98
PID 3656 wrote to memory of 1552	3656	Umbral.exe	100
PID 3656 wrote to memory of 1552	3656	Umbral.exe	100
PID 3656 wrote to memory of 220	3656	Umbral.exe	102
PID 3656 wrote to memory of 220	3656	Umbral.exe	102
PID 3656 wrote to memory of 1456	3656	Umbral.exe	104
PID 3656 wrote to memory of 1456	3656	Umbral.exe	104
PID 3656 wrote to memory of 2848	3656	Umbral.exe	106
PID 3656 wrote to memory of 2848	3656	Umbral.exe	106
PID 3656 wrote to memory of 4940	3656	Umbral.exe	108
PID 3656 wrote to memory of 4940	3656	Umbral.exe	108
PID 3656 wrote to memory of 1212	3656	Umbral.exe	113
PID 3656 wrote to memory of 1212	3656	Umbral.exe	113
PID 1212 wrote to memory of 1040	1212	cmd.exe	115
PID 1212 wrote to memory of 1040	1212	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5000	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:3656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2888
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:5000
- 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:1360
- 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:4524
- 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:2104
- 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:4252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1552
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1456
- 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:2848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4940
- 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:1212
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1040

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_k2uicwso.a4x.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1360-13-0x000001FDE75A0000-0x000001FDE75C2000-memory.dmp

Filesize
136KB

Download
memory/1360-14-0x00007FF9209B0000-0x00007FF921471000-memory.dmp

Filesize
10.8MB

Download
memory/1360-15-0x00007FF9209B0000-0x00007FF921471000-memory.dmp

Filesize
10.8MB

Download
memory/1360-18-0x00007FF9209B0000-0x00007FF921471000-memory.dmp

Filesize
10.8MB

Download
memory/1360-3-0x00007FF9209B0000-0x00007FF921471000-memory.dmp

Filesize
10.8MB

Download
memory/3656-34-0x000001D745210000-0x000001D745260000-memory.dmp

Filesize
320KB

Download
memory/3656-33-0x000001D745190000-0x000001D745206000-memory.dmp

Filesize
472KB

Download
memory/3656-35-0x000001D745130000-0x000001D74514E000-memory.dmp

Filesize
120KB

Download
memory/3656-1-0x000001D72AA60000-0x000001D72AAA0000-memory.dmp

Filesize
256KB

Download
memory/3656-0-0x00007FF9209B3000-0x00007FF9209B5000-memory.dmp

Filesize
8KB

Download
memory/3656-71-0x000001D745150000-0x000001D74515A000-memory.dmp

Filesize
40KB

Download
memory/3656-72-0x000001D745360000-0x000001D745372000-memory.dmp

Filesize
72KB

Download
memory/3656-2-0x00007FF9209B0000-0x00007FF921471000-memory.dmp

Filesize
10.8MB

Download
memory/3656-90-0x00007FF9209B0000-0x00007FF921471000-memory.dmp

Filesize
10.8MB

Download