umbral | 185cff1b051d1389bc9cc2c50a4988e32f78f476696f61a0ae6fcd0bc33628af

Analysis

max time kernel
145s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
23-06-2024 14:21

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General

Target

Umbral.exe
Size

229KB
MD5

258ee0671cfbdfc017c50b7bb77b965f
SHA1

aa7a991a81bff5d276525ca1224dc24f4e497168
SHA256

185cff1b051d1389bc9cc2c50a4988e32f78f476696f61a0ae6fcd0bc33628af
SHA512

9243436b0a880f85fed7f1e9cc9f1b624e62a500574ebcf92a2b8b20a256cd4961623b9731ea94532031023e164ab509569119f043d9e4559f1bee7851eddabc
SSDEEP

6144:tloZMLrIkd8g+EtXHkv/iD446LAS3tW+xukt/qqfrwb8e1mai:voZ0L+EP8/LAS3tW+xukt/qqfsY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2672-0-0x0000012811110000-0x0000012811150000-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
4068	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
31	discord.com
33	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
7	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2860	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2672	Umbral.exe
4068	powershell.exe
4068	powershell.exe
3624	powershell.exe
3624	powershell.exe
2724	powershell.exe
2724	powershell.exe
4172	powershell.exe
4172	powershell.exe
4392	powershell.exe
4392	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	Umbral.exe
Token: SeIncreaseQuotaPrivilege	208	wmic.exe
Token: SeSecurityPrivilege	208	wmic.exe
Token: SeTakeOwnershipPrivilege	208	wmic.exe
Token: SeLoadDriverPrivilege	208	wmic.exe
Token: SeSystemProfilePrivilege	208	wmic.exe
Token: SeSystemtimePrivilege	208	wmic.exe
Token: SeProfSingleProcessPrivilege	208	wmic.exe
Token: SeIncBasePriorityPrivilege	208	wmic.exe
Token: SeCreatePagefilePrivilege	208	wmic.exe
Token: SeBackupPrivilege	208	wmic.exe
Token: SeRestorePrivilege	208	wmic.exe
Token: SeShutdownPrivilege	208	wmic.exe
Token: SeDebugPrivilege	208	wmic.exe
Token: SeSystemEnvironmentPrivilege	208	wmic.exe
Token: SeRemoteShutdownPrivilege	208	wmic.exe
Token: SeUndockPrivilege	208	wmic.exe
Token: SeManageVolumePrivilege	208	wmic.exe
Token: 33	208	wmic.exe
Token: 34	208	wmic.exe
Token: 35	208	wmic.exe
Token: 36	208	wmic.exe
Token: SeIncreaseQuotaPrivilege	208	wmic.exe
Token: SeSecurityPrivilege	208	wmic.exe
Token: SeTakeOwnershipPrivilege	208	wmic.exe
Token: SeLoadDriverPrivilege	208	wmic.exe
Token: SeSystemProfilePrivilege	208	wmic.exe
Token: SeSystemtimePrivilege	208	wmic.exe
Token: SeProfSingleProcessPrivilege	208	wmic.exe
Token: SeIncBasePriorityPrivilege	208	wmic.exe
Token: SeCreatePagefilePrivilege	208	wmic.exe
Token: SeBackupPrivilege	208	wmic.exe
Token: SeRestorePrivilege	208	wmic.exe
Token: SeShutdownPrivilege	208	wmic.exe
Token: SeDebugPrivilege	208	wmic.exe
Token: SeSystemEnvironmentPrivilege	208	wmic.exe
Token: SeRemoteShutdownPrivilege	208	wmic.exe
Token: SeUndockPrivilege	208	wmic.exe
Token: SeManageVolumePrivilege	208	wmic.exe
Token: 33	208	wmic.exe
Token: 34	208	wmic.exe
Token: 35	208	wmic.exe
Token: 36	208	wmic.exe
Token: SeDebugPrivilege	4068	powershell.exe
Token: SeDebugPrivilege	3624	powershell.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	4172	powershell.exe
Token: SeIncreaseQuotaPrivilege	3760	wmic.exe
Token: SeSecurityPrivilege	3760	wmic.exe
Token: SeTakeOwnershipPrivilege	3760	wmic.exe
Token: SeLoadDriverPrivilege	3760	wmic.exe
Token: SeSystemProfilePrivilege	3760	wmic.exe
Token: SeSystemtimePrivilege	3760	wmic.exe
Token: SeProfSingleProcessPrivilege	3760	wmic.exe
Token: SeIncBasePriorityPrivilege	3760	wmic.exe
Token: SeCreatePagefilePrivilege	3760	wmic.exe
Token: SeBackupPrivilege	3760	wmic.exe
Token: SeRestorePrivilege	3760	wmic.exe
Token: SeShutdownPrivilege	3760	wmic.exe
Token: SeDebugPrivilege	3760	wmic.exe
Token: SeSystemEnvironmentPrivilege	3760	wmic.exe
Token: SeRemoteShutdownPrivilege	3760	wmic.exe
Token: SeUndockPrivilege	3760	wmic.exe
Token: SeManageVolumePrivilege	3760	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 208	2672	Umbral.exe	85
PID 2672 wrote to memory of 208	2672	Umbral.exe	85
PID 2672 wrote to memory of 4068	2672	Umbral.exe	90
PID 2672 wrote to memory of 4068	2672	Umbral.exe	90
PID 2672 wrote to memory of 3624	2672	Umbral.exe	94
PID 2672 wrote to memory of 3624	2672	Umbral.exe	94
PID 2672 wrote to memory of 2724	2672	Umbral.exe	96
PID 2672 wrote to memory of 2724	2672	Umbral.exe	96
PID 2672 wrote to memory of 4172	2672	Umbral.exe	98
PID 2672 wrote to memory of 4172	2672	Umbral.exe	98
PID 2672 wrote to memory of 3760	2672	Umbral.exe	102
PID 2672 wrote to memory of 3760	2672	Umbral.exe	102
PID 2672 wrote to memory of 4888	2672	Umbral.exe	104
PID 2672 wrote to memory of 4888	2672	Umbral.exe	104
PID 2672 wrote to memory of 4440	2672	Umbral.exe	106
PID 2672 wrote to memory of 4440	2672	Umbral.exe	106
PID 2672 wrote to memory of 4392	2672	Umbral.exe	108
PID 2672 wrote to memory of 4392	2672	Umbral.exe	108
PID 2672 wrote to memory of 2860	2672	Umbral.exe	110
PID 2672 wrote to memory of 2860	2672	Umbral.exe	110

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:2672
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:208
- 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:4068
- 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:3624
- 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:2724
- 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:4172
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4440
- 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:4392
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2860

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
948B

MD5
1a58f982c18490e622e00d4eb75ace5a

SHA1
60c30527b74659ecf09089a5a7c02a1df9a71b65

SHA256
4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

SHA512
ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

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
f69437dfc5b7cb5d7422d4557c5193a1

SHA1
2ad54bbf836fa97a9386a6b251c5d769a6d2badb

SHA256
f91341354f99f965d4737a54743ca914531391e5c03005020ace74f8c536c0e0

SHA512
993fe382cbd8b978e06e6e5870757959b6944d70a4e6bf97420039b20dd6f1a566545cc271b28bcb5795205d4e8ea6ce1ef4effe6ccd45d909c2560e867ccc3c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fkpnz052.a4c.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2672-72-0x000001282B690000-0x000001282B69A000-memory.dmp

Filesize
40KB

Download
memory/2672-35-0x000001282B960000-0x000001282B97E000-memory.dmp

Filesize
120KB

Download
memory/2672-94-0x00007FFA904C0000-0x00007FFA90F81000-memory.dmp

Filesize
10.8MB

Download
memory/2672-93-0x000001282BB20000-0x000001282BCC9000-memory.dmp

Filesize
1.7MB

Download
memory/2672-2-0x00007FFA904C0000-0x00007FFA90F81000-memory.dmp

Filesize
10.8MB

Download
memory/2672-33-0x000001282B870000-0x000001282B8E6000-memory.dmp

Filesize
472KB

Download
memory/2672-34-0x000001282B8F0000-0x000001282B940000-memory.dmp

Filesize
320KB

Download
memory/2672-73-0x000001282B810000-0x000001282B822000-memory.dmp

Filesize
72KB

Download
memory/2672-1-0x00007FFA904C3000-0x00007FFA904C5000-memory.dmp

Filesize
8KB

Download
memory/2672-0-0x0000012811110000-0x0000012811150000-memory.dmp

Filesize
256KB

Download
memory/4068-4-0x00007FFA904C0000-0x00007FFA90F81000-memory.dmp

Filesize
10.8MB

Download
memory/4068-15-0x00007FFA904C0000-0x00007FFA90F81000-memory.dmp

Filesize
10.8MB

Download
memory/4068-10-0x0000021C58120000-0x0000021C58142000-memory.dmp

Filesize
136KB

Download
memory/4068-3-0x00007FFA904C0000-0x00007FFA90F81000-memory.dmp

Filesize
10.8MB

Download
memory/4068-18-0x00007FFA904C0000-0x00007FFA90F81000-memory.dmp

Filesize
10.8MB

Download