umbral | e22bde6d04787794012e7e12ceaf1cf8fdf145f81551d90febf6a4f9c5d4e029

Resubmissions

02-11-2024 20:47

241102-zk65faxqfq 10

02-11-2024 20:43

241102-zhqpnsvemg 10

Analysis

max time kernel
146s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
02-11-2024 20:47

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
behavioral3/memory/4600-1-0x000001B36A090000-0x000001B36A0D0000-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
3096	powershell.exe
4556	powershell.exe
1516	powershell.exe
2216	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
3	discord.com
5	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
1	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
2160	cmd.exe
456	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1536	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
456	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3096	powershell.exe
3096	powershell.exe
4556	powershell.exe
4556	powershell.exe
1516	powershell.exe
1516	powershell.exe
952	powershell.exe
952	powershell.exe
2216	powershell.exe
2216	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	GTAGLoader.exe
Token: SeDebugPrivilege	3096	powershell.exe
Token: SeDebugPrivilege	4556	powershell.exe
Token: SeDebugPrivilege	1516	powershell.exe
Token: SeDebugPrivilege	952	powershell.exe
Token: SeIncreaseQuotaPrivilege	3504	wmic.exe
Token: SeSecurityPrivilege	3504	wmic.exe
Token: SeTakeOwnershipPrivilege	3504	wmic.exe
Token: SeLoadDriverPrivilege	3504	wmic.exe
Token: SeSystemProfilePrivilege	3504	wmic.exe
Token: SeSystemtimePrivilege	3504	wmic.exe
Token: SeProfSingleProcessPrivilege	3504	wmic.exe
Token: SeIncBasePriorityPrivilege	3504	wmic.exe
Token: SeCreatePagefilePrivilege	3504	wmic.exe
Token: SeBackupPrivilege	3504	wmic.exe
Token: SeRestorePrivilege	3504	wmic.exe
Token: SeShutdownPrivilege	3504	wmic.exe
Token: SeDebugPrivilege	3504	wmic.exe
Token: SeSystemEnvironmentPrivilege	3504	wmic.exe
Token: SeRemoteShutdownPrivilege	3504	wmic.exe
Token: SeUndockPrivilege	3504	wmic.exe
Token: SeManageVolumePrivilege	3504	wmic.exe
Token: 33	3504	wmic.exe
Token: 34	3504	wmic.exe
Token: 35	3504	wmic.exe
Token: 36	3504	wmic.exe
Token: SeIncreaseQuotaPrivilege	3504	wmic.exe
Token: SeSecurityPrivilege	3504	wmic.exe
Token: SeTakeOwnershipPrivilege	3504	wmic.exe
Token: SeLoadDriverPrivilege	3504	wmic.exe
Token: SeSystemProfilePrivilege	3504	wmic.exe
Token: SeSystemtimePrivilege	3504	wmic.exe
Token: SeProfSingleProcessPrivilege	3504	wmic.exe
Token: SeIncBasePriorityPrivilege	3504	wmic.exe
Token: SeCreatePagefilePrivilege	3504	wmic.exe
Token: SeBackupPrivilege	3504	wmic.exe
Token: SeRestorePrivilege	3504	wmic.exe
Token: SeShutdownPrivilege	3504	wmic.exe
Token: SeDebugPrivilege	3504	wmic.exe
Token: SeSystemEnvironmentPrivilege	3504	wmic.exe
Token: SeRemoteShutdownPrivilege	3504	wmic.exe
Token: SeUndockPrivilege	3504	wmic.exe
Token: SeManageVolumePrivilege	3504	wmic.exe
Token: 33	3504	wmic.exe
Token: 34	3504	wmic.exe
Token: 35	3504	wmic.exe
Token: 36	3504	wmic.exe
Token: SeIncreaseQuotaPrivilege	1448	wmic.exe
Token: SeSecurityPrivilege	1448	wmic.exe
Token: SeTakeOwnershipPrivilege	1448	wmic.exe
Token: SeLoadDriverPrivilege	1448	wmic.exe
Token: SeSystemProfilePrivilege	1448	wmic.exe
Token: SeSystemtimePrivilege	1448	wmic.exe
Token: SeProfSingleProcessPrivilege	1448	wmic.exe
Token: SeIncBasePriorityPrivilege	1448	wmic.exe
Token: SeCreatePagefilePrivilege	1448	wmic.exe
Token: SeBackupPrivilege	1448	wmic.exe
Token: SeRestorePrivilege	1448	wmic.exe
Token: SeShutdownPrivilege	1448	wmic.exe
Token: SeDebugPrivilege	1448	wmic.exe
Token: SeSystemEnvironmentPrivilege	1448	wmic.exe
Token: SeRemoteShutdownPrivilege	1448	wmic.exe
Token: SeUndockPrivilege	1448	wmic.exe
Token: SeManageVolumePrivilege	1448	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4600 wrote to memory of 3664	4600	GTAGLoader.exe	80
PID 4600 wrote to memory of 3664	4600	GTAGLoader.exe	80
PID 4600 wrote to memory of 3096	4600	GTAGLoader.exe	82
PID 4600 wrote to memory of 3096	4600	GTAGLoader.exe	82
PID 4600 wrote to memory of 4556	4600	GTAGLoader.exe	85
PID 4600 wrote to memory of 4556	4600	GTAGLoader.exe	85
PID 4600 wrote to memory of 1516	4600	GTAGLoader.exe	87
PID 4600 wrote to memory of 1516	4600	GTAGLoader.exe	87
PID 4600 wrote to memory of 952	4600	GTAGLoader.exe	89
PID 4600 wrote to memory of 952	4600	GTAGLoader.exe	89
PID 4600 wrote to memory of 3504	4600	GTAGLoader.exe	91
PID 4600 wrote to memory of 3504	4600	GTAGLoader.exe	91
PID 4600 wrote to memory of 1448	4600	GTAGLoader.exe	94
PID 4600 wrote to memory of 1448	4600	GTAGLoader.exe	94
PID 4600 wrote to memory of 2484	4600	GTAGLoader.exe	96
PID 4600 wrote to memory of 2484	4600	GTAGLoader.exe	96
PID 4600 wrote to memory of 2216	4600	GTAGLoader.exe	98
PID 4600 wrote to memory of 2216	4600	GTAGLoader.exe	98
PID 4600 wrote to memory of 1536	4600	GTAGLoader.exe	100
PID 4600 wrote to memory of 1536	4600	GTAGLoader.exe	100
PID 4600 wrote to memory of 2160	4600	GTAGLoader.exe	102
PID 4600 wrote to memory of 2160	4600	GTAGLoader.exe	102
PID 2160 wrote to memory of 456	2160	cmd.exe	104
PID 2160 wrote to memory of 456	2160	cmd.exe	104

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3664	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:4600
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\GTAGLoader.exe"
  2⤵
  - Views/modifies file attributes
  PID:3664
- 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:3096
- 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:4556
- 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:1516
- 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:952
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3504
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1448
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2484
- 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:2216
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1536
- 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:2160
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:456

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
2e8eb51096d6f6781456fef7df731d97

SHA1
ec2aaf851a618fb43c3d040a13a71997c25bda43

SHA256
96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

SHA512
0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

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

Filesize
948B

MD5
fa21dd50b4e64421076f843031c8ccf7

SHA1
2c56e94f130c0d8d77116e939ffee4e37cf982bd

SHA256
e4f21aca1e12aafa8de7af24b79a75526e902c7d4b3fea5bdb6e723976997be3

SHA512
b8de2bfeb7af06c587dd1f424d410cf83471f31a55a3ea4c4481ce07ffd9bf66ddc1f7775ecd6ac65ac33baaec90ba5a208a9aefc84f31125a50dfb919982687

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
38313610aa2c53241c45ef53eee77502

SHA1
a360787a1865cb09de211d9641c84296127f1571

SHA256
303f750cdb0db15514b21e165bed60ef8bb408543731b1937a05b709530e9992

SHA512
1c9c506099b9f98bbc82eeae9a3ea4ccd93c7fed373732db4ea1ae7dc86c77704f282a549da3042bf39e10cbd1c465bdfdf082a7a8ce39c04330e67609cb45f9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jcl15vo1.syk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3096-19-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/3096-11-0x0000027EF23A0000-0x0000027EF23C2000-memory.dmp

Filesize
136KB

Download
memory/3096-15-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/3096-18-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/3096-14-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/3096-13-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/3096-12-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/4600-0-0x00007FFE07293000-0x00007FFE07295000-memory.dmp

Filesize
8KB

Download
memory/4600-34-0x000001B36BEE0000-0x000001B36BF30000-memory.dmp

Filesize
320KB

Download
memory/4600-35-0x000001B36BEB0000-0x000001B36BECE000-memory.dmp

Filesize
120KB

Download
memory/4600-33-0x000001B36C600000-0x000001B36C676000-memory.dmp

Filesize
472KB

Download
memory/4600-2-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download
memory/4600-70-0x000001B36C680000-0x000001B36C68A000-memory.dmp

Filesize
40KB

Download
memory/4600-71-0x000001B36C6B0000-0x000001B36C6C2000-memory.dmp

Filesize
72KB

Download
memory/4600-1-0x000001B36A090000-0x000001B36A0D0000-memory.dmp

Filesize
256KB

Download
memory/4600-90-0x00007FFE07290000-0x00007FFE07D52000-memory.dmp

Filesize
10.8MB

Download