umbral | a67211d3d5d58e9193a6a99db1f44c05d96bf48f6f6589ea6d0b91f92233d611

Analysis

max time kernel
75s
max time network
74s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 03:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

skeet (1) (skeet).zip
Size

3.5MB
MD5

4ec3431f372650d231b13b3688e62959
SHA1

6380f8899ced0cde4d4347504ce63c5da49bd196
SHA256

a67211d3d5d58e9193a6a99db1f44c05d96bf48f6f6589ea6d0b91f92233d611
SHA512

138b799e10609bd10736348be67cce6ca951b895f9dce31ec978406da087ed90468da33553baafba1f62275e0211981d8b256225b1d826b877b96f980e5d65b5
SSDEEP

98304:QHJEPWBVNTfNSrTV8h/kUvHvj6pdDZYFkoXXCPBZMnYPJ2k:QHJEPWHNT1STVavsqFkonsBcMYk

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 4 IoCs

resource	yara_rule
behavioral1/files/0x000d000000023a69-4.dat	family_umbral
behavioral1/files/0x000c000000023aa9-10.dat	family_umbral
behavioral1/memory/2336-23-0x0000011C44AC0000-0x0000011C44B00000-memory.dmp	family_umbral
behavioral1/memory/468-26-0x0000000000400000-0x0000000000449000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2844	powershell.exe
4948	powershell.exe
4584	powershell.exe
1584	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	steam.exe

Executes dropped EXE 3 IoCs

pid	Process
468	steam.exe
2336	stilak.exe
1048	steam.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

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
23	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	steam.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	steam.exe

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
1732	PING.EXE
4860	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4232	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1732	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe
1048	steam.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeRestorePrivilege	3996	7zFM.exe
Token: 35	3996	7zFM.exe
Token: SeSecurityPrivilege	3996	7zFM.exe
Token: SeDebugPrivilege	2336	stilak.exe
Token: SeIncreaseQuotaPrivilege	756	wmic.exe
Token: SeSecurityPrivilege	756	wmic.exe
Token: SeTakeOwnershipPrivilege	756	wmic.exe
Token: SeLoadDriverPrivilege	756	wmic.exe
Token: SeSystemProfilePrivilege	756	wmic.exe
Token: SeSystemtimePrivilege	756	wmic.exe
Token: SeProfSingleProcessPrivilege	756	wmic.exe
Token: SeIncBasePriorityPrivilege	756	wmic.exe
Token: SeCreatePagefilePrivilege	756	wmic.exe
Token: SeBackupPrivilege	756	wmic.exe
Token: SeRestorePrivilege	756	wmic.exe
Token: SeShutdownPrivilege	756	wmic.exe
Token: SeDebugPrivilege	756	wmic.exe
Token: SeSystemEnvironmentPrivilege	756	wmic.exe
Token: SeRemoteShutdownPrivilege	756	wmic.exe
Token: SeUndockPrivilege	756	wmic.exe
Token: SeManageVolumePrivilege	756	wmic.exe
Token: 33	756	wmic.exe
Token: 34	756	wmic.exe
Token: 35	756	wmic.exe
Token: 36	756	wmic.exe
Token: SeIncreaseQuotaPrivilege	756	wmic.exe
Token: SeSecurityPrivilege	756	wmic.exe
Token: SeTakeOwnershipPrivilege	756	wmic.exe
Token: SeLoadDriverPrivilege	756	wmic.exe
Token: SeSystemProfilePrivilege	756	wmic.exe
Token: SeSystemtimePrivilege	756	wmic.exe
Token: SeProfSingleProcessPrivilege	756	wmic.exe
Token: SeIncBasePriorityPrivilege	756	wmic.exe
Token: SeCreatePagefilePrivilege	756	wmic.exe
Token: SeBackupPrivilege	756	wmic.exe
Token: SeRestorePrivilege	756	wmic.exe
Token: SeShutdownPrivilege	756	wmic.exe
Token: SeDebugPrivilege	756	wmic.exe
Token: SeSystemEnvironmentPrivilege	756	wmic.exe
Token: SeRemoteShutdownPrivilege	756	wmic.exe
Token: SeUndockPrivilege	756	wmic.exe
Token: SeManageVolumePrivilege	756	wmic.exe
Token: 33	756	wmic.exe
Token: 34	756	wmic.exe
Token: 35	756	wmic.exe
Token: 36	756	wmic.exe
Token: SeDebugPrivilege	1584	powershell.exe
Token: SeDebugPrivilege	2844	powershell.exe
Token: SeDebugPrivilege	4948	powershell.exe
Token: SeDebugPrivilege	448	powershell.exe
Token: SeIncreaseQuotaPrivilege	976	wmic.exe
Token: SeSecurityPrivilege	976	wmic.exe
Token: SeTakeOwnershipPrivilege	976	wmic.exe
Token: SeLoadDriverPrivilege	976	wmic.exe
Token: SeSystemProfilePrivilege	976	wmic.exe
Token: SeSystemtimePrivilege	976	wmic.exe
Token: SeProfSingleProcessPrivilege	976	wmic.exe
Token: SeIncBasePriorityPrivilege	976	wmic.exe
Token: SeCreatePagefilePrivilege	976	wmic.exe
Token: SeBackupPrivilege	976	wmic.exe
Token: SeRestorePrivilege	976	wmic.exe
Token: SeShutdownPrivilege	976	wmic.exe
Token: SeDebugPrivilege	976	wmic.exe
Token: SeSystemEnvironmentPrivilege	976	wmic.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3996	7zFM.exe
3996	7zFM.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 2336	468	steam.exe	90
PID 468 wrote to memory of 2336	468	steam.exe	90
PID 468 wrote to memory of 1048	468	steam.exe	91
PID 468 wrote to memory of 1048	468	steam.exe	91
PID 468 wrote to memory of 1048	468	steam.exe	91
PID 2336 wrote to memory of 756	2336	stilak.exe	94
PID 2336 wrote to memory of 756	2336	stilak.exe	94
PID 2336 wrote to memory of 2576	2336	stilak.exe	97
PID 2336 wrote to memory of 2576	2336	stilak.exe	97
PID 2336 wrote to memory of 1584	2336	stilak.exe	99
PID 2336 wrote to memory of 1584	2336	stilak.exe	99
PID 2336 wrote to memory of 2844	2336	stilak.exe	101
PID 2336 wrote to memory of 2844	2336	stilak.exe	101
PID 2336 wrote to memory of 4948	2336	stilak.exe	103
PID 2336 wrote to memory of 4948	2336	stilak.exe	103
PID 2336 wrote to memory of 448	2336	stilak.exe	105
PID 2336 wrote to memory of 448	2336	stilak.exe	105
PID 2336 wrote to memory of 976	2336	stilak.exe	109
PID 2336 wrote to memory of 976	2336	stilak.exe	109
PID 2336 wrote to memory of 3000	2336	stilak.exe	111
PID 2336 wrote to memory of 3000	2336	stilak.exe	111
PID 2336 wrote to memory of 3388	2336	stilak.exe	113
PID 2336 wrote to memory of 3388	2336	stilak.exe	113
PID 2336 wrote to memory of 4584	2336	stilak.exe	115
PID 2336 wrote to memory of 4584	2336	stilak.exe	115
PID 2336 wrote to memory of 4232	2336	stilak.exe	117
PID 2336 wrote to memory of 4232	2336	stilak.exe	117
PID 2336 wrote to memory of 4860	2336	stilak.exe	120
PID 2336 wrote to memory of 4860	2336	stilak.exe	120
PID 4860 wrote to memory of 1732	4860	cmd.exe	122
PID 4860 wrote to memory of 1732	4860	cmd.exe	122

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2576	attrib.exe

C:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\skeet (1) (skeet).zip"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:3996

C:\Users\Admin\Desktop\steam.exe
"C:\Users\Admin\Desktop\steam.exe"
1⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:468
- C:\Users\Admin\AppData\Local\Temp\stilak.exe
  "C:\Users\Admin\AppData\Local\Temp\stilak.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:756
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\stilak.exe"
    3⤵
    - Views/modifies file attributes
    PID:2576
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\stilak.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of AdjustPrivilegeToken
    PID:1584
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of AdjustPrivilegeToken
    PID:2844
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of AdjustPrivilegeToken
    PID:4948
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:448
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:976
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:3000
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3388
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    PID:4584
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:4232
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\stilak.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:4860
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1732
- C:\Users\Admin\AppData\Local\Temp\steam.exe
  "C:\Users\Admin\AppData\Local\Temp\steam.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1048

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

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

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
1KB

MD5
9414279c978fc63be2d6e8cdd60de7d0

SHA1
b86a7b232ca0605e889a399cbbfda1f21f307c4e

SHA256
8842ede011bb1789493ca4f9c641d02a2774ae088dd9a272ca577bfe98f41040

SHA512
8431b5d229ae27144510627f90107f685cc67502d58efc95b36bd994af9f72f9356a8dba17dd033e7d52e269ea00bf67ede22e3c0140c589e9919bb10b41a62c

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

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\Temp\__PSScriptPolicyTest_ixcgzjwq.m4y.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\steam.exe

Filesize
23KB

MD5
afe9b68ed167f0ec45a28bd47d3054f7

SHA1
bd07d119f7cc88573d864d68aa3d3612fcbbea9f

SHA256
aadd255a8efe2491b29c1d5917f72db3eea93ffde89995985a19d0d4c172213c

SHA512
657c69fa4ddc7a609d22f7e0a10911103177197a56a69d3c9d9461d8e8db6ca732c315e4b1f1bbb0934b6dee29574e569a381b02e3c3f40b6e392eb7b1659349

Download Submit
C:\Users\Admin\AppData\Local\Temp\stilak.exe

Filesize
229KB

MD5
e3b279ecf73025b241b9d73de1351b64

SHA1
2c1c4234db6df0155120c0bafc57cc03317d206e

SHA256
2437e5beaf8b761df7c3a080509144c7242104f892a53252904c5056bde4b0bc

SHA512
2bc56a70c9343c223eac3adf8852796cd38a4b7b145b45b213a41f862afa58fa3573b36dc96dc3ac34a5843fa9875a2282dbcfcb5d139a9bcffb22fdeb05d44b

Download Submit
C:\Users\Admin\Desktop\steam.exe

Filesize
262KB

MD5
cf08d3d9c4114b4320ce81df382eb2b4

SHA1
b5f63e6fccc4b4e0f7160732370c53ae8f4ee8dd

SHA256
8014176421621d377b9f6e42a2fa7d6991306c2be124fe890c13ac3c43cbf25f

SHA512
8d49e928958215cec941752058cb8f0991a9710863b02c3ab689e3ed246412b73773b708428e04cfa45a1899b648d31986b9a6d41babfaf673411cffe12d1cef

Download Submit
memory/468-26-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1584-37-0x0000014044330000-0x0000014044352000-memory.dmp

Filesize
136KB

Download
memory/2336-54-0x0000011C5F1F0000-0x0000011C5F266000-memory.dmp

Filesize
472KB

Download
memory/2336-55-0x0000011C5F1A0000-0x0000011C5F1F0000-memory.dmp

Filesize
320KB

Download
memory/2336-56-0x0000011C5F170000-0x0000011C5F18E000-memory.dmp

Filesize
120KB

Download
memory/2336-23-0x0000011C44AC0000-0x0000011C44B00000-memory.dmp

Filesize
256KB

Download
memory/2336-20-0x00007FFEF0243000-0x00007FFEF0245000-memory.dmp

Filesize
8KB

Download
memory/2336-93-0x0000011C5F280000-0x0000011C5F28A000-memory.dmp

Filesize
40KB

Download
memory/2336-94-0x0000011C5F2B0000-0x0000011C5F2C2000-memory.dmp

Filesize
72KB

Download