umbral | 7ba28499d2c1399eba708b00fdc97095f938d5755d148fbe5626ffa68b8e5385

Analysis

max time kernel
7s
max time network
9s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
30-07-2024 17:34

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General

Target

y.exe
Size

224KB
MD5

4c335d3e3958413df7b9c81b7ac29100
SHA1

a43f7ae504164fd29a9bb7f88430efeb396ed69f
SHA256

7ba28499d2c1399eba708b00fdc97095f938d5755d148fbe5626ffa68b8e5385
SHA512

28008caa99955df01abf2d9756c204b0b4105659ea1150c32a54044f60b3ac7a1c0631530e6b6e3bdd377ecaa6aac4c7845691262d18979cc1f74709a13bfce2
SSDEEP

6144:floZM+rIkd8g+EtXHkv/iD4SQzYkK8eucHi:doZtL+EP8RR

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1376-0-0x0000019DF6180000-0x0000019DF61BE000-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 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2252	powershell.exe
4280	powershell.exe
4552	powershell.exe

Drops file in Drivers directory 1 IoCs

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

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
3	ip-api.com

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1376	y.exe
2252	powershell.exe
2252	powershell.exe
4552	powershell.exe
4552	powershell.exe
4280	powershell.exe
4280	powershell.exe
3868	powershell.exe
3868	powershell.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

description	pid	Process
Token: SeDebugPrivilege	1376	y.exe
Token: SeIncreaseQuotaPrivilege	4460	wmic.exe
Token: SeSecurityPrivilege	4460	wmic.exe
Token: SeTakeOwnershipPrivilege	4460	wmic.exe
Token: SeLoadDriverPrivilege	4460	wmic.exe
Token: SeSystemProfilePrivilege	4460	wmic.exe
Token: SeSystemtimePrivilege	4460	wmic.exe
Token: SeProfSingleProcessPrivilege	4460	wmic.exe
Token: SeIncBasePriorityPrivilege	4460	wmic.exe
Token: SeCreatePagefilePrivilege	4460	wmic.exe
Token: SeBackupPrivilege	4460	wmic.exe
Token: SeRestorePrivilege	4460	wmic.exe
Token: SeShutdownPrivilege	4460	wmic.exe
Token: SeDebugPrivilege	4460	wmic.exe
Token: SeSystemEnvironmentPrivilege	4460	wmic.exe
Token: SeRemoteShutdownPrivilege	4460	wmic.exe
Token: SeUndockPrivilege	4460	wmic.exe
Token: SeManageVolumePrivilege	4460	wmic.exe
Token: 33	4460	wmic.exe
Token: 34	4460	wmic.exe
Token: 35	4460	wmic.exe
Token: 36	4460	wmic.exe
Token: SeIncreaseQuotaPrivilege	4460	wmic.exe
Token: SeSecurityPrivilege	4460	wmic.exe
Token: SeTakeOwnershipPrivilege	4460	wmic.exe
Token: SeLoadDriverPrivilege	4460	wmic.exe
Token: SeSystemProfilePrivilege	4460	wmic.exe
Token: SeSystemtimePrivilege	4460	wmic.exe
Token: SeProfSingleProcessPrivilege	4460	wmic.exe
Token: SeIncBasePriorityPrivilege	4460	wmic.exe
Token: SeCreatePagefilePrivilege	4460	wmic.exe
Token: SeBackupPrivilege	4460	wmic.exe
Token: SeRestorePrivilege	4460	wmic.exe
Token: SeShutdownPrivilege	4460	wmic.exe
Token: SeDebugPrivilege	4460	wmic.exe
Token: SeSystemEnvironmentPrivilege	4460	wmic.exe
Token: SeRemoteShutdownPrivilege	4460	wmic.exe
Token: SeUndockPrivilege	4460	wmic.exe
Token: SeManageVolumePrivilege	4460	wmic.exe
Token: 33	4460	wmic.exe
Token: 34	4460	wmic.exe
Token: 35	4460	wmic.exe
Token: 36	4460	wmic.exe
Token: SeDebugPrivilege	2252	powershell.exe
Token: SeDebugPrivilege	4552	powershell.exe
Token: SeDebugPrivilege	4280	powershell.exe
Token: SeDebugPrivilege	3868	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 4460	1376	y.exe	80
PID 1376 wrote to memory of 4460	1376	y.exe	80
PID 1376 wrote to memory of 5012	1376	y.exe	83
PID 1376 wrote to memory of 5012	1376	y.exe	83
PID 1376 wrote to memory of 2252	1376	y.exe	85
PID 1376 wrote to memory of 2252	1376	y.exe	85
PID 1376 wrote to memory of 4552	1376	y.exe	87
PID 1376 wrote to memory of 4552	1376	y.exe	87
PID 1376 wrote to memory of 4280	1376	y.exe	89
PID 1376 wrote to memory of 4280	1376	y.exe	89
PID 1376 wrote to memory of 3868	1376	y.exe	91
PID 1376 wrote to memory of 3868	1376	y.exe	91

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5012	attrib.exe

C:\Users\Admin\AppData\Local\Temp\y.exe
"C:\Users\Admin\AppData\Local\Temp\y.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4460
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\y.exe"
  2⤵
  - Views/modifies file attributes
  PID:5012
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\y.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2252
- 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:4552
- 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:4280
- 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:3868

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

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
944B

MD5
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

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

Filesize
948B

MD5
6a29e9f9eb72c3bffbb054cd27e3ceea

SHA1
d38f7c2ad68dcf1d24deca9792256ff53d5218b2

SHA256
7a9f831f96b9e4843751dea3ed57ee11d70bb83a5970ddf9d6bd440f4def442c

SHA512
b4826f172c6ac60ad17412a634987c45640b1b8fe03aecba26510ae224685bcd571bc4b131724036e2b502b3a8198fb69414be8c72e46f833f0601a15d313430

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

Filesize
1KB

MD5
71418d0b9965891dd306df50dd80a200

SHA1
a0df11b105d282fdce36532bc9edb82a410ac070

SHA256
2c63e7f45102284aaf6f22dfbccf6055a9de6b9163b1589ac766be7b2f8fbb52

SHA512
e399b8c48ba33ba7417f7be56eab4489a32f5f39d7fc580a7e01b50ab6565476dac55b769926f36148664ea377b4622b9d537e08d8964fa6b870b2facae0d2bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xhlclbqk.pym.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1376-33-0x0000019DF7E00000-0x0000019DF7E1E000-memory.dmp

Filesize
120KB

Download
memory/1376-1-0x00007FFB29313000-0x00007FFB29315000-memory.dmp

Filesize
8KB

Download
memory/1376-2-0x00007FFB29310000-0x00007FFB29DD1000-memory.dmp

Filesize
10.8MB

Download
memory/1376-0-0x0000019DF6180000-0x0000019DF61BE000-memory.dmp

Filesize
248KB

Download
memory/1376-70-0x0000019DF8930000-0x0000019DF8942000-memory.dmp

Filesize
72KB

Download
memory/1376-69-0x0000019DF87B0000-0x0000019DF87BA000-memory.dmp

Filesize
40KB

Download
memory/1376-31-0x0000019DF8950000-0x0000019DF89C6000-memory.dmp

Filesize
472KB

Download
memory/1376-32-0x0000019DF8750000-0x0000019DF87A0000-memory.dmp

Filesize
320KB

Download
memory/2252-13-0x00007FFB29310000-0x00007FFB29DD1000-memory.dmp

Filesize
10.8MB

Download
memory/2252-17-0x00007FFB29310000-0x00007FFB29DD1000-memory.dmp

Filesize
10.8MB

Download
memory/2252-12-0x000002462A560000-0x000002462A582000-memory.dmp

Filesize
136KB

Download
memory/2252-15-0x00007FFB29310000-0x00007FFB29DD1000-memory.dmp

Filesize
10.8MB

Download
memory/2252-14-0x00007FFB29310000-0x00007FFB29DD1000-memory.dmp

Filesize
10.8MB

Download