umbral | 3294164d79836fe3765e57e50dd0ac898164ccc049f097fb2deb2725478aa583

Analysis

max time kernel
136s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2024 15:16

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General

Target

Umbral.exe
Size

231KB
MD5

37040bc6e02b555d9062631211678bc9
SHA1

cb2f4548ce9bd51ce42301ffa74130d9c6098ad5
SHA256

3294164d79836fe3765e57e50dd0ac898164ccc049f097fb2deb2725478aa583
SHA512

e5db52931152bef14e1dda82288a1f4265d79c4c4ad08f143994b2b60b2b530dfbcdcb1468bd70e5799a55b2a4f02565249e0d41944032bbd43a296757d9754c
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4FxEe9rI8jB67NokR4cb8e1mtqpui:joZtL+EP8FxEe9rI8jB67NokRxuqR

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4760-1-0x0000021606E40000-0x0000021606E80000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3232	powershell.exe
2852	powershell.exe
4432	powershell.exe
1552	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
26	discord.com
27	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
14	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
2040	cmd.exe
5004	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3356	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5004	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4760	Umbral.exe
1552	powershell.exe
1552	powershell.exe
2852	powershell.exe
2852	powershell.exe
4432	powershell.exe
4432	powershell.exe
4500	powershell.exe
4500	powershell.exe
3232	powershell.exe
3232	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2396	wmic.exe
Token: SeSecurityPrivilege	2396	wmic.exe
Token: SeTakeOwnershipPrivilege	2396	wmic.exe
Token: SeLoadDriverPrivilege	2396	wmic.exe
Token: SeSystemProfilePrivilege	2396	wmic.exe
Token: SeSystemtimePrivilege	2396	wmic.exe
Token: SeProfSingleProcessPrivilege	2396	wmic.exe
Token: SeIncBasePriorityPrivilege	2396	wmic.exe
Token: SeCreatePagefilePrivilege	2396	wmic.exe
Token: SeBackupPrivilege	2396	wmic.exe
Token: SeRestorePrivilege	2396	wmic.exe
Token: SeShutdownPrivilege	2396	wmic.exe
Token: SeDebugPrivilege	2396	wmic.exe
Token: SeSystemEnvironmentPrivilege	2396	wmic.exe
Token: SeRemoteShutdownPrivilege	2396	wmic.exe
Token: SeUndockPrivilege	2396	wmic.exe
Token: SeManageVolumePrivilege	2396	wmic.exe
Token: 33	2396	wmic.exe
Token: 34	2396	wmic.exe
Token: 35	2396	wmic.exe
Token: 36	2396	wmic.exe
Token: SeIncreaseQuotaPrivilege	2396	wmic.exe
Token: SeSecurityPrivilege	2396	wmic.exe
Token: SeTakeOwnershipPrivilege	2396	wmic.exe
Token: SeLoadDriverPrivilege	2396	wmic.exe
Token: SeSystemProfilePrivilege	2396	wmic.exe
Token: SeSystemtimePrivilege	2396	wmic.exe
Token: SeProfSingleProcessPrivilege	2396	wmic.exe
Token: SeIncBasePriorityPrivilege	2396	wmic.exe
Token: SeCreatePagefilePrivilege	2396	wmic.exe
Token: SeBackupPrivilege	2396	wmic.exe
Token: SeRestorePrivilege	2396	wmic.exe
Token: SeShutdownPrivilege	2396	wmic.exe
Token: SeDebugPrivilege	2396	wmic.exe
Token: SeSystemEnvironmentPrivilege	2396	wmic.exe
Token: SeRemoteShutdownPrivilege	2396	wmic.exe
Token: SeUndockPrivilege	2396	wmic.exe
Token: SeManageVolumePrivilege	2396	wmic.exe
Token: 33	2396	wmic.exe
Token: 34	2396	wmic.exe
Token: 35	2396	wmic.exe
Token: 36	2396	wmic.exe
Token: SeDebugPrivilege	1552	powershell.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	4432	powershell.exe
Token: SeDebugPrivilege	4500	powershell.exe
Token: SeIncreaseQuotaPrivilege	4720	wmic.exe
Token: SeSecurityPrivilege	4720	wmic.exe
Token: SeTakeOwnershipPrivilege	4720	wmic.exe
Token: SeLoadDriverPrivilege	4720	wmic.exe
Token: SeSystemProfilePrivilege	4720	wmic.exe
Token: SeSystemtimePrivilege	4720	wmic.exe
Token: SeProfSingleProcessPrivilege	4720	wmic.exe
Token: SeIncBasePriorityPrivilege	4720	wmic.exe
Token: SeCreatePagefilePrivilege	4720	wmic.exe
Token: SeBackupPrivilege	4720	wmic.exe
Token: SeRestorePrivilege	4720	wmic.exe
Token: SeShutdownPrivilege	4720	wmic.exe
Token: SeDebugPrivilege	4720	wmic.exe
Token: SeSystemEnvironmentPrivilege	4720	wmic.exe
Token: SeRemoteShutdownPrivilege	4720	wmic.exe
Token: SeUndockPrivilege	4720	wmic.exe
Token: SeManageVolumePrivilege	4720	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 2396	4760	Umbral.exe	87
PID 4760 wrote to memory of 2396	4760	Umbral.exe	87
PID 4760 wrote to memory of 3344	4760	Umbral.exe	90
PID 4760 wrote to memory of 3344	4760	Umbral.exe	90
PID 4760 wrote to memory of 1552	4760	Umbral.exe	92
PID 4760 wrote to memory of 1552	4760	Umbral.exe	92
PID 4760 wrote to memory of 2852	4760	Umbral.exe	94
PID 4760 wrote to memory of 2852	4760	Umbral.exe	94
PID 4760 wrote to memory of 4432	4760	Umbral.exe	96
PID 4760 wrote to memory of 4432	4760	Umbral.exe	96
PID 4760 wrote to memory of 4500	4760	Umbral.exe	98
PID 4760 wrote to memory of 4500	4760	Umbral.exe	98
PID 4760 wrote to memory of 4720	4760	Umbral.exe	100
PID 4760 wrote to memory of 4720	4760	Umbral.exe	100
PID 4760 wrote to memory of 4408	4760	Umbral.exe	102
PID 4760 wrote to memory of 4408	4760	Umbral.exe	102
PID 4760 wrote to memory of 3884	4760	Umbral.exe	104
PID 4760 wrote to memory of 3884	4760	Umbral.exe	104
PID 4760 wrote to memory of 3232	4760	Umbral.exe	106
PID 4760 wrote to memory of 3232	4760	Umbral.exe	106
PID 4760 wrote to memory of 3356	4760	Umbral.exe	108
PID 4760 wrote to memory of 3356	4760	Umbral.exe	108
PID 4760 wrote to memory of 2040	4760	Umbral.exe	110
PID 4760 wrote to memory of 2040	4760	Umbral.exe	110
PID 2040 wrote to memory of 5004	2040	cmd.exe	112
PID 2040 wrote to memory of 5004	2040	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3344	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:4760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2396
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:3344
- 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:1552
- 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:2852
- 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:4432
- 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:4500
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4720
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4408
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3884
- 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:3232
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3356
- 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:2040
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:5004

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s fdPHost
1⤵
PID:3076

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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
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_kzdhjkyb.tqw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1552-13-0x00000293FE4B0000-0x00000293FE4D2000-memory.dmp

Filesize
136KB

Download
memory/1552-14-0x00007FFD7E400000-0x00007FFD7EEC1000-memory.dmp

Filesize
10.8MB

Download
memory/1552-15-0x00007FFD7E400000-0x00007FFD7EEC1000-memory.dmp

Filesize
10.8MB

Download
memory/1552-18-0x00007FFD7E400000-0x00007FFD7EEC1000-memory.dmp

Filesize
10.8MB

Download
memory/1552-3-0x00007FFD7E400000-0x00007FFD7EEC1000-memory.dmp

Filesize
10.8MB

Download
memory/4760-34-0x0000021621620000-0x0000021621670000-memory.dmp

Filesize
320KB

Download
memory/4760-33-0x00000216215A0000-0x0000021621616000-memory.dmp

Filesize
472KB

Download
memory/4760-35-0x00000216212E0000-0x00000216212FE000-memory.dmp

Filesize
120KB

Download
memory/4760-1-0x0000021606E40000-0x0000021606E80000-memory.dmp

Filesize
256KB

Download
memory/4760-0-0x00007FFD7E403000-0x00007FFD7E405000-memory.dmp

Filesize
8KB

Download
memory/4760-71-0x0000021608BE0000-0x0000021608BEA000-memory.dmp

Filesize
40KB

Download
memory/4760-72-0x0000021621300000-0x0000021621312000-memory.dmp

Filesize
72KB

Download
memory/4760-2-0x00007FFD7E400000-0x00007FFD7EEC1000-memory.dmp

Filesize
10.8MB

Download
memory/4760-90-0x00007FFD7E400000-0x00007FFD7EEC1000-memory.dmp

Filesize
10.8MB

Download