umbral | e45dc08a9c9c96afdcbb33dc108417df2ec52ccb0bb1f776bc83770c70ef4739

Analysis

max time kernel
122s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-09-2024 18:21

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General

Target

explorer (1).exe
Size

1.3MB
MD5

575b9fa5e916d6e0fe48003127c0e7b3
SHA1

ea732f7fcd8e0f20f8c66c8a0ab20880851c2f6e
SHA256

e45dc08a9c9c96afdcbb33dc108417df2ec52ccb0bb1f776bc83770c70ef4739
SHA512

3f337262446aad13ad05589f170149b916692ef4dffd1f005029dcbd01a6e703442d19678641501d466df9f3e264ed946ee39290141fc470ba545725d8fd3f14
SSDEEP

24576:StvMlasKkTqxNx5V27DeEhP959IY9noqx78BXO/1byJRT:0gep23b9IUoqxT/1byJ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1285146489047220246/6vaVojXPUSotwltFctwpYZfgInpOOjizCsR1Uwtcyb0_147wBk4FcBkKK4kpNTvlzaom

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/memory/3032-2-0x0000000000E60000-0x00000000012FE000-memory.dmp	family_umbral
behavioral1/memory/3032-41-0x0000000000E60000-0x00000000012FE000-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
2556	powershell.exe
692	powershell.exe
2512	powershell.exe
1604	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	explorer (1).exe

Deletes itself 1 IoCs

pid	Process
2412	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
7	discord.com
8	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
4	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3032	explorer (1).exe
3032	explorer (1).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	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	explorer (1).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	attrib.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	wmic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2412	cmd.exe
2180	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2876	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2180	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3032	explorer (1).exe
2556	powershell.exe
692	powershell.exe
2512	powershell.exe
1244	powershell.exe
1604	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	explorer (1).exe
Token: SeIncreaseQuotaPrivilege	2812	wmic.exe
Token: SeSecurityPrivilege	2812	wmic.exe
Token: SeTakeOwnershipPrivilege	2812	wmic.exe
Token: SeLoadDriverPrivilege	2812	wmic.exe
Token: SeSystemProfilePrivilege	2812	wmic.exe
Token: SeSystemtimePrivilege	2812	wmic.exe
Token: SeProfSingleProcessPrivilege	2812	wmic.exe
Token: SeIncBasePriorityPrivilege	2812	wmic.exe
Token: SeCreatePagefilePrivilege	2812	wmic.exe
Token: SeBackupPrivilege	2812	wmic.exe
Token: SeRestorePrivilege	2812	wmic.exe
Token: SeShutdownPrivilege	2812	wmic.exe
Token: SeDebugPrivilege	2812	wmic.exe
Token: SeSystemEnvironmentPrivilege	2812	wmic.exe
Token: SeRemoteShutdownPrivilege	2812	wmic.exe
Token: SeUndockPrivilege	2812	wmic.exe
Token: SeManageVolumePrivilege	2812	wmic.exe
Token: 33	2812	wmic.exe
Token: 34	2812	wmic.exe
Token: 35	2812	wmic.exe
Token: SeIncreaseQuotaPrivilege	2812	wmic.exe
Token: SeSecurityPrivilege	2812	wmic.exe
Token: SeTakeOwnershipPrivilege	2812	wmic.exe
Token: SeLoadDriverPrivilege	2812	wmic.exe
Token: SeSystemProfilePrivilege	2812	wmic.exe
Token: SeSystemtimePrivilege	2812	wmic.exe
Token: SeProfSingleProcessPrivilege	2812	wmic.exe
Token: SeIncBasePriorityPrivilege	2812	wmic.exe
Token: SeCreatePagefilePrivilege	2812	wmic.exe
Token: SeBackupPrivilege	2812	wmic.exe
Token: SeRestorePrivilege	2812	wmic.exe
Token: SeShutdownPrivilege	2812	wmic.exe
Token: SeDebugPrivilege	2812	wmic.exe
Token: SeSystemEnvironmentPrivilege	2812	wmic.exe
Token: SeRemoteShutdownPrivilege	2812	wmic.exe
Token: SeUndockPrivilege	2812	wmic.exe
Token: SeManageVolumePrivilege	2812	wmic.exe
Token: 33	2812	wmic.exe
Token: 34	2812	wmic.exe
Token: 35	2812	wmic.exe
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	692	powershell.exe
Token: SeDebugPrivilege	2512	powershell.exe
Token: SeDebugPrivilege	1244	powershell.exe
Token: SeIncreaseQuotaPrivilege	1140	wmic.exe
Token: SeSecurityPrivilege	1140	wmic.exe
Token: SeTakeOwnershipPrivilege	1140	wmic.exe
Token: SeLoadDriverPrivilege	1140	wmic.exe
Token: SeSystemProfilePrivilege	1140	wmic.exe
Token: SeSystemtimePrivilege	1140	wmic.exe
Token: SeProfSingleProcessPrivilege	1140	wmic.exe
Token: SeIncBasePriorityPrivilege	1140	wmic.exe
Token: SeCreatePagefilePrivilege	1140	wmic.exe
Token: SeBackupPrivilege	1140	wmic.exe
Token: SeRestorePrivilege	1140	wmic.exe
Token: SeShutdownPrivilege	1140	wmic.exe
Token: SeDebugPrivilege	1140	wmic.exe
Token: SeSystemEnvironmentPrivilege	1140	wmic.exe
Token: SeRemoteShutdownPrivilege	1140	wmic.exe
Token: SeUndockPrivilege	1140	wmic.exe
Token: SeManageVolumePrivilege	1140	wmic.exe
Token: 33	1140	wmic.exe
Token: 34	1140	wmic.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3032	explorer (1).exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2812	3032	explorer (1).exe	30
PID 3032 wrote to memory of 2812	3032	explorer (1).exe	30
PID 3032 wrote to memory of 2812	3032	explorer (1).exe	30
PID 3032 wrote to memory of 2812	3032	explorer (1).exe	30
PID 3032 wrote to memory of 2524	3032	explorer (1).exe	33
PID 3032 wrote to memory of 2524	3032	explorer (1).exe	33
PID 3032 wrote to memory of 2524	3032	explorer (1).exe	33
PID 3032 wrote to memory of 2524	3032	explorer (1).exe	33
PID 3032 wrote to memory of 2556	3032	explorer (1).exe	35
PID 3032 wrote to memory of 2556	3032	explorer (1).exe	35
PID 3032 wrote to memory of 2556	3032	explorer (1).exe	35
PID 3032 wrote to memory of 2556	3032	explorer (1).exe	35
PID 3032 wrote to memory of 692	3032	explorer (1).exe	37
PID 3032 wrote to memory of 692	3032	explorer (1).exe	37
PID 3032 wrote to memory of 692	3032	explorer (1).exe	37
PID 3032 wrote to memory of 692	3032	explorer (1).exe	37
PID 3032 wrote to memory of 2512	3032	explorer (1).exe	39
PID 3032 wrote to memory of 2512	3032	explorer (1).exe	39
PID 3032 wrote to memory of 2512	3032	explorer (1).exe	39
PID 3032 wrote to memory of 2512	3032	explorer (1).exe	39
PID 3032 wrote to memory of 1244	3032	explorer (1).exe	41
PID 3032 wrote to memory of 1244	3032	explorer (1).exe	41
PID 3032 wrote to memory of 1244	3032	explorer (1).exe	41
PID 3032 wrote to memory of 1244	3032	explorer (1).exe	41
PID 3032 wrote to memory of 1140	3032	explorer (1).exe	43
PID 3032 wrote to memory of 1140	3032	explorer (1).exe	43
PID 3032 wrote to memory of 1140	3032	explorer (1).exe	43
PID 3032 wrote to memory of 1140	3032	explorer (1).exe	43
PID 3032 wrote to memory of 2380	3032	explorer (1).exe	45
PID 3032 wrote to memory of 2380	3032	explorer (1).exe	45
PID 3032 wrote to memory of 2380	3032	explorer (1).exe	45
PID 3032 wrote to memory of 2380	3032	explorer (1).exe	45
PID 3032 wrote to memory of 1380	3032	explorer (1).exe	47
PID 3032 wrote to memory of 1380	3032	explorer (1).exe	47
PID 3032 wrote to memory of 1380	3032	explorer (1).exe	47
PID 3032 wrote to memory of 1380	3032	explorer (1).exe	47
PID 3032 wrote to memory of 1604	3032	explorer (1).exe	49
PID 3032 wrote to memory of 1604	3032	explorer (1).exe	49
PID 3032 wrote to memory of 1604	3032	explorer (1).exe	49
PID 3032 wrote to memory of 1604	3032	explorer (1).exe	49
PID 3032 wrote to memory of 2876	3032	explorer (1).exe	51
PID 3032 wrote to memory of 2876	3032	explorer (1).exe	51
PID 3032 wrote to memory of 2876	3032	explorer (1).exe	51
PID 3032 wrote to memory of 2876	3032	explorer (1).exe	51
PID 3032 wrote to memory of 2412	3032	explorer (1).exe	53
PID 3032 wrote to memory of 2412	3032	explorer (1).exe	53
PID 3032 wrote to memory of 2412	3032	explorer (1).exe	53
PID 3032 wrote to memory of 2412	3032	explorer (1).exe	53
PID 2412 wrote to memory of 2180	2412	cmd.exe	55
PID 2412 wrote to memory of 2180	2412	cmd.exe	55
PID 2412 wrote to memory of 2180	2412	cmd.exe	55
PID 2412 wrote to memory of 2180	2412	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2524	attrib.exe

C:\Users\Admin\AppData\Local\Temp\explorer (1).exe
"C:\Users\Admin\AppData\Local\Temp\explorer (1).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:3032
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2812
- C:\Windows\SysWOW64\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\explorer (1).exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:2524
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\explorer (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- 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:692
- 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:2512
- 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:1244
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1140
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2380
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1380
- 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:1604
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - System Location Discovery: System Language Discovery
  - Detects videocard installed
  PID:2876
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\explorer (1).exe" && pause
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2412
- - 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:2180

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
45c10b9de20962e69e08164825062c73

SHA1
62fd7c2ef34c41c05f38787f431de8b3e3501ec2

SHA256
e445e582e794a504e11bd9e51649ce6c95d2bca3b356288332bba935dbe5862b

SHA512
9af4b2b1d287c0f490370dd6d3e0c4f9c10648d951533a99c8327f65120fce1b2248971b0f4db8cafad287e32a45111793805689fc1be5fb756d1c70e96a217c

Download Submit
memory/3032-0-0x0000000000E60000-0x00000000012FE000-memory.dmp

Filesize
4.6MB

Download
memory/3032-1-0x00000000746EE000-0x00000000746EF000-memory.dmp

Filesize
4KB

Download
memory/3032-2-0x0000000000E60000-0x00000000012FE000-memory.dmp

Filesize
4.6MB

Download
memory/3032-3-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/3032-41-0x0000000000E60000-0x00000000012FE000-memory.dmp

Filesize
4.6MB

Download
memory/3032-42-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download