umbral | 351cba23cab65cd57d5ec9e553bfa02d35a32a8f75467a75b1c3735b87af6a3d

Resubmissions

04-07-2024 13:03

240704-qaf1tsxckj 10

04-07-2024 12:47

240704-p1mqmaxbjr 10

Analysis

max time kernel
92s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04-07-2024 13:03

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General

Target

SolaraB/Solara/solarabootstrapper.exe
Size

227KB
MD5

ebf1358b8496d5c895f4b8f9298f7f96
SHA1

f0136d66bf877934376858064344c2038b998fd4
SHA256

bccba62c31f689715d01f4e80edbe2fe6a816edb571c4a409fccbe2d5b789b65
SHA512

ca82e5838c7e8b292f46e5b20684b7fbb861f449678fc6283bd5c587c0958c069800e94c9f65b239609434564a394f8ca168d83d40bc27c96ade6c18744beb6d
SSDEEP

6144:eloZMLrIkd8g+EtXHkv/iD46E6TjpaC9sop7mGz3/b8e1mZJi:IoZ0L+EP86E6TjpaC9sop7mGzLt

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource yara_rule

behavioral2/memory/4432-1-0x00000186E8FF0000-0x00000186E9030000-memory.dmp family_umbral
Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

3632 powershell.exe
Drops file in Drivers directory 1 IoCs

Processes:

solarabootstrapper.exe

description ioc process

File opened for modification C:\Windows\System32\drivers\etc\hosts solarabootstrapper.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

Processes:

flow ioc

23 discord.com
24 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.

Processes:

flow ioc

7 ip-api.com
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.

System Information Discovery
T1082

Processes:

wmic.exe

pid process

1784 wmic.exe

resource	yara_rule
behavioral2/memory/4432-1-0x00000186E8FF0000-0x00000186E9030000-memory.dmp	family_umbral

pid	process
3632	powershell.exe

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

flow	ioc
23	discord.com
24	discord.com

flow	ioc
7	ip-api.com

pid	process
1784	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

Processes:

solarabootstrapper.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid	process
4432	solarabootstrapper.exe
3632	powershell.exe
3632	powershell.exe
2592	powershell.exe
2592	powershell.exe
2516	powershell.exe
2516	powershell.exe
3652	powershell.exe
3652	powershell.exe
5056	powershell.exe
5056	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

solarabootstrapper.exewmic.exepowershell.exepowershell.exepowershell.exepowershell.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	4432	solarabootstrapper.exe
Token: SeIncreaseQuotaPrivilege	4992	wmic.exe
Token: SeSecurityPrivilege	4992	wmic.exe
Token: SeTakeOwnershipPrivilege	4992	wmic.exe
Token: SeLoadDriverPrivilege	4992	wmic.exe
Token: SeSystemProfilePrivilege	4992	wmic.exe
Token: SeSystemtimePrivilege	4992	wmic.exe
Token: SeProfSingleProcessPrivilege	4992	wmic.exe
Token: SeIncBasePriorityPrivilege	4992	wmic.exe
Token: SeCreatePagefilePrivilege	4992	wmic.exe
Token: SeBackupPrivilege	4992	wmic.exe
Token: SeRestorePrivilege	4992	wmic.exe
Token: SeShutdownPrivilege	4992	wmic.exe
Token: SeDebugPrivilege	4992	wmic.exe
Token: SeSystemEnvironmentPrivilege	4992	wmic.exe
Token: SeRemoteShutdownPrivilege	4992	wmic.exe
Token: SeUndockPrivilege	4992	wmic.exe
Token: SeManageVolumePrivilege	4992	wmic.exe
Token: 33	4992	wmic.exe
Token: 34	4992	wmic.exe
Token: 35	4992	wmic.exe
Token: 36	4992	wmic.exe
Token: SeIncreaseQuotaPrivilege	4992	wmic.exe
Token: SeSecurityPrivilege	4992	wmic.exe
Token: SeTakeOwnershipPrivilege	4992	wmic.exe
Token: SeLoadDriverPrivilege	4992	wmic.exe
Token: SeSystemProfilePrivilege	4992	wmic.exe
Token: SeSystemtimePrivilege	4992	wmic.exe
Token: SeProfSingleProcessPrivilege	4992	wmic.exe
Token: SeIncBasePriorityPrivilege	4992	wmic.exe
Token: SeCreatePagefilePrivilege	4992	wmic.exe
Token: SeBackupPrivilege	4992	wmic.exe
Token: SeRestorePrivilege	4992	wmic.exe
Token: SeShutdownPrivilege	4992	wmic.exe
Token: SeDebugPrivilege	4992	wmic.exe
Token: SeSystemEnvironmentPrivilege	4992	wmic.exe
Token: SeRemoteShutdownPrivilege	4992	wmic.exe
Token: SeUndockPrivilege	4992	wmic.exe
Token: SeManageVolumePrivilege	4992	wmic.exe
Token: 33	4992	wmic.exe
Token: 34	4992	wmic.exe
Token: 35	4992	wmic.exe
Token: 36	4992	wmic.exe
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	2516	powershell.exe
Token: SeDebugPrivilege	3652	powershell.exe
Token: SeIncreaseQuotaPrivilege	1304	wmic.exe
Token: SeSecurityPrivilege	1304	wmic.exe
Token: SeTakeOwnershipPrivilege	1304	wmic.exe
Token: SeLoadDriverPrivilege	1304	wmic.exe
Token: SeSystemProfilePrivilege	1304	wmic.exe
Token: SeSystemtimePrivilege	1304	wmic.exe
Token: SeProfSingleProcessPrivilege	1304	wmic.exe
Token: SeIncBasePriorityPrivilege	1304	wmic.exe
Token: SeCreatePagefilePrivilege	1304	wmic.exe
Token: SeBackupPrivilege	1304	wmic.exe
Token: SeRestorePrivilege	1304	wmic.exe
Token: SeShutdownPrivilege	1304	wmic.exe
Token: SeDebugPrivilege	1304	wmic.exe
Token: SeSystemEnvironmentPrivilege	1304	wmic.exe
Token: SeRemoteShutdownPrivilege	1304	wmic.exe
Token: SeUndockPrivilege	1304	wmic.exe
Token: SeManageVolumePrivilege	1304	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

solarabootstrapper.exe

description	pid	process	target process
PID 4432 wrote to memory of 4992	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 4992	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 3632	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 3632	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 2592	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 2592	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 2516	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 2516	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 3652	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 3652	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 1304	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 1304	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 3352	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 3352	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 4216	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 4216	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 5056	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 5056	4432	solarabootstrapper.exe	powershell.exe
PID 4432 wrote to memory of 1784	4432	solarabootstrapper.exe	wmic.exe
PID 4432 wrote to memory of 1784	4432	solarabootstrapper.exe	wmic.exe

C:\Users\Admin\AppData\Local\Temp\SolaraB\Solara\solarabootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraB\Solara\solarabootstrapper.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4432

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4992

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SolaraB\Solara\solarabootstrapper.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3632

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2592

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2516

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:3652

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" os get Caption
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1304

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" computersystem get totalphysicalmemory
2⤵
PID:3352

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
2⤵
PID:4216

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:5056

C:\Windows\System32\Wbem\wmic.exe
"wmic" path win32_VideoController get name
2⤵
- Detects videocard installed
PID:1784

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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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
8dfe6948dc7f05b90f3a7ad15ad7abd1

SHA1
fbd32d5bdfe8eb86822e0fcc122a8dcc8a9903c6

SHA256
41ff4edf6dad5e82781a6d374582a8411cc1327874015494549507669016e0c5

SHA512
de44711ccc274da6ff7c37cc1ee9a221527ce4e029d9e2966af576566fbefc230ecf0f90274b9f068f9f1b1a12f29d3fac428d0ee719ed9c75472bfefa1033ac

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
948B

MD5
39c2ac09b52b0685c7da5b25746d8a64

SHA1
c0ac1559da69dc9ad0496c11ce37ef9b907ea656

SHA256
c582429e23c81918907db9c7f32bef2d32c873f2da84fa450707482408e3a160

SHA512
9a6f4c5944cecdd6cf2114f7db583e4742a93b3c9eec6fd60328585370a8ba2f917f7ce689c0341d2dbf391f58ff34ee0088d9d2158ebb2450c547257da095a1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
1fead80c61d476be2d4f3b607a6999fa

SHA1
30d2823c5886f09343f2b0a2ac3ffe83b5bebc47

SHA256
6b69b1251ced8db4be183a04d482873275ac0a020e76eaca2d5305645e167928

SHA512
bcb37ebe4f46f666243aaf34f68ae5301cbd140ef19850035771f0cf3598000d6f8f0852cdf819b618f27079ef758081c72e7b984973f2937ef590bf1a205e54

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2txh2gra.gij.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3632-4-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

Filesize
10.8MB

Download
memory/3632-5-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

Filesize
10.8MB

Download
memory/3632-12-0x0000027572610000-0x0000027572632000-memory.dmp

Filesize
136KB

Download
memory/3632-18-0x0000027572780000-0x000002757299C000-memory.dmp

Filesize
2.1MB

Download
memory/3632-19-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

Filesize
10.8MB

Download
memory/3632-3-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

Filesize
10.8MB

Download
memory/4432-0-0x00007FF816413000-0x00007FF816415000-memory.dmp

Filesize
8KB

Download
memory/4432-35-0x00000186EB6F0000-0x00000186EB740000-memory.dmp

Filesize
320KB

Download
memory/4432-36-0x00000186EB810000-0x00000186EB82E000-memory.dmp

Filesize
120KB

Download
memory/4432-1-0x00000186E8FF0000-0x00000186E9030000-memory.dmp

Filesize
256KB

Download
memory/4432-34-0x00000186EB770000-0x00000186EB7E6000-memory.dmp

Filesize
472KB

Download
memory/4432-72-0x00000186EAFE0000-0x00000186EAFEA000-memory.dmp

Filesize
40KB

Download
memory/4432-73-0x00000186EB7F0000-0x00000186EB802000-memory.dmp

Filesize
72KB

Download
memory/4432-2-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

Filesize
10.8MB

Download
memory/4432-91-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

Filesize
10.8MB

Download