umbral | f764ca094bf86a91474cde7969cec7cdd4a5f28985888b36cda9b674c53876e0

Analysis

max time kernel
93s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
13-07-2024 07:53

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General

Target

SolaraBootstrapper.exe
Size

230KB
MD5

29fc973f5ba727abf85edfb4ee46d81c
SHA1

c18c0265b2539201f7502229da8dee2efb5b5e11
SHA256

f764ca094bf86a91474cde7969cec7cdd4a5f28985888b36cda9b674c53876e0
SHA512

433f49e1b5fba7a36b5fad4e91816d4200ee984dcedc97c8bf3e5369e327e7c7eb09dcd849394f219eeb8dc3a353c41b26af05c40fbfe93dfd0773e0474d4810
SSDEEP

6144:DloZM+rIkd8g+EtXHkv/iD4NJRErDJ6idxIJbGmT/hb8e1mfFdi:hoZtL+EP8NJRErDJ6idxIJbGmTxeC

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1828-0-0x000001BA8C300000-0x000001BA8C340000-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

pid	Process
4320	powershell.exe

Drops file in Drivers directory 1 IoCs

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

flow	ioc
20	discord.com
19	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4720	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4768	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1828	SolaraBootstrapper.exe
4320	powershell.exe
4320	powershell.exe
768	powershell.exe
768	powershell.exe
3388	powershell.exe
3388	powershell.exe
348	powershell.exe
348	powershell.exe
3412	powershell.exe
3412	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1828	SolaraBootstrapper.exe
Token: SeIncreaseQuotaPrivilege	1356	wmic.exe
Token: SeSecurityPrivilege	1356	wmic.exe
Token: SeTakeOwnershipPrivilege	1356	wmic.exe
Token: SeLoadDriverPrivilege	1356	wmic.exe
Token: SeSystemProfilePrivilege	1356	wmic.exe
Token: SeSystemtimePrivilege	1356	wmic.exe
Token: SeProfSingleProcessPrivilege	1356	wmic.exe
Token: SeIncBasePriorityPrivilege	1356	wmic.exe
Token: SeCreatePagefilePrivilege	1356	wmic.exe
Token: SeBackupPrivilege	1356	wmic.exe
Token: SeRestorePrivilege	1356	wmic.exe
Token: SeShutdownPrivilege	1356	wmic.exe
Token: SeDebugPrivilege	1356	wmic.exe
Token: SeSystemEnvironmentPrivilege	1356	wmic.exe
Token: SeRemoteShutdownPrivilege	1356	wmic.exe
Token: SeUndockPrivilege	1356	wmic.exe
Token: SeManageVolumePrivilege	1356	wmic.exe
Token: 33	1356	wmic.exe
Token: 34	1356	wmic.exe
Token: 35	1356	wmic.exe
Token: 36	1356	wmic.exe
Token: SeIncreaseQuotaPrivilege	1356	wmic.exe
Token: SeSecurityPrivilege	1356	wmic.exe
Token: SeTakeOwnershipPrivilege	1356	wmic.exe
Token: SeLoadDriverPrivilege	1356	wmic.exe
Token: SeSystemProfilePrivilege	1356	wmic.exe
Token: SeSystemtimePrivilege	1356	wmic.exe
Token: SeProfSingleProcessPrivilege	1356	wmic.exe
Token: SeIncBasePriorityPrivilege	1356	wmic.exe
Token: SeCreatePagefilePrivilege	1356	wmic.exe
Token: SeBackupPrivilege	1356	wmic.exe
Token: SeRestorePrivilege	1356	wmic.exe
Token: SeShutdownPrivilege	1356	wmic.exe
Token: SeDebugPrivilege	1356	wmic.exe
Token: SeSystemEnvironmentPrivilege	1356	wmic.exe
Token: SeRemoteShutdownPrivilege	1356	wmic.exe
Token: SeUndockPrivilege	1356	wmic.exe
Token: SeManageVolumePrivilege	1356	wmic.exe
Token: 33	1356	wmic.exe
Token: 34	1356	wmic.exe
Token: 35	1356	wmic.exe
Token: 36	1356	wmic.exe
Token: SeDebugPrivilege	4320	powershell.exe
Token: SeDebugPrivilege	768	powershell.exe
Token: SeDebugPrivilege	3388	powershell.exe
Token: SeDebugPrivilege	348	powershell.exe
Token: SeIncreaseQuotaPrivilege	4864	wmic.exe
Token: SeSecurityPrivilege	4864	wmic.exe
Token: SeTakeOwnershipPrivilege	4864	wmic.exe
Token: SeLoadDriverPrivilege	4864	wmic.exe
Token: SeSystemProfilePrivilege	4864	wmic.exe
Token: SeSystemtimePrivilege	4864	wmic.exe
Token: SeProfSingleProcessPrivilege	4864	wmic.exe
Token: SeIncBasePriorityPrivilege	4864	wmic.exe
Token: SeCreatePagefilePrivilege	4864	wmic.exe
Token: SeBackupPrivilege	4864	wmic.exe
Token: SeRestorePrivilege	4864	wmic.exe
Token: SeShutdownPrivilege	4864	wmic.exe
Token: SeDebugPrivilege	4864	wmic.exe
Token: SeSystemEnvironmentPrivilege	4864	wmic.exe
Token: SeRemoteShutdownPrivilege	4864	wmic.exe
Token: SeUndockPrivilege	4864	wmic.exe
Token: SeManageVolumePrivilege	4864	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1828 wrote to memory of 1356	1828	SolaraBootstrapper.exe	85
PID 1828 wrote to memory of 1356	1828	SolaraBootstrapper.exe	85
PID 1828 wrote to memory of 2912	1828	SolaraBootstrapper.exe	89
PID 1828 wrote to memory of 2912	1828	SolaraBootstrapper.exe	89
PID 1828 wrote to memory of 4320	1828	SolaraBootstrapper.exe	91
PID 1828 wrote to memory of 4320	1828	SolaraBootstrapper.exe	91
PID 1828 wrote to memory of 768	1828	SolaraBootstrapper.exe	93
PID 1828 wrote to memory of 768	1828	SolaraBootstrapper.exe	93
PID 1828 wrote to memory of 3388	1828	SolaraBootstrapper.exe	95
PID 1828 wrote to memory of 3388	1828	SolaraBootstrapper.exe	95
PID 1828 wrote to memory of 348	1828	SolaraBootstrapper.exe	97
PID 1828 wrote to memory of 348	1828	SolaraBootstrapper.exe	97
PID 1828 wrote to memory of 4864	1828	SolaraBootstrapper.exe	99
PID 1828 wrote to memory of 4864	1828	SolaraBootstrapper.exe	99
PID 1828 wrote to memory of 2500	1828	SolaraBootstrapper.exe	101
PID 1828 wrote to memory of 2500	1828	SolaraBootstrapper.exe	101
PID 1828 wrote to memory of 1004	1828	SolaraBootstrapper.exe	103
PID 1828 wrote to memory of 1004	1828	SolaraBootstrapper.exe	103
PID 1828 wrote to memory of 3412	1828	SolaraBootstrapper.exe	105
PID 1828 wrote to memory of 3412	1828	SolaraBootstrapper.exe	105
PID 1828 wrote to memory of 4720	1828	SolaraBootstrapper.exe	107
PID 1828 wrote to memory of 4720	1828	SolaraBootstrapper.exe	107
PID 1828 wrote to memory of 2580	1828	SolaraBootstrapper.exe	109
PID 1828 wrote to memory of 2580	1828	SolaraBootstrapper.exe	109
PID 2580 wrote to memory of 4768	2580	cmd.exe	111
PID 2580 wrote to memory of 4768	2580	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2912	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1828
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1356
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
  2⤵
  - Views/modifies file attributes
  PID:2912
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4320
- 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:768
- 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:3388
- 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:348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4864
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2500
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1004
- 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:3412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4720
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2580
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4768

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
948B

MD5
8bbd6908e148d61010a3130cb6aae4a0

SHA1
e74bcc1b0f762fcd7469d0621b9c7fe50b0c365d

SHA256
79c8ed7085737723dbc7c40b32d01ea400171787259b7458561cd5db60401023

SHA512
38057edb5f2ce86329f558bf34224c6110443635756b1b26da99f89b13e3f971bf602939f40d3fce8459cfdab4ad4fa4928ecb933ff045173535fcc46fe4855f

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
062ea20db7bcfd48fd3560cc2f353644

SHA1
e0a330cd634233a2df5f2945b7cfa1756e5dbec3

SHA256
3e0d56b74d704ee319e020189cce7bca958d9ddd6eddebadb9c795c724dea4f1

SHA512
afa5b85b305e4ef815c3e679e3f51347e9fc4c94f740daae7e3e5bc1f9670d4f4e68267d9ef602812520a4d491585eb86eca793fba04d26f28c72f0293440108

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1gznvr0l.0kh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1828-68-0x000001BA8DFB0000-0x000001BA8DFBA000-memory.dmp

Filesize
40KB

Download
memory/1828-35-0x000001BA8E100000-0x000001BA8E11E000-memory.dmp

Filesize
120KB

Download
memory/1828-87-0x00007FF9F9A50000-0x00007FF9FA511000-memory.dmp

Filesize
10.8MB

Download
memory/1828-69-0x000001BA8E120000-0x000001BA8E132000-memory.dmp

Filesize
72KB

Download
memory/1828-2-0x00007FF9F9A50000-0x00007FF9FA511000-memory.dmp

Filesize
10.8MB

Download
memory/1828-33-0x000001BAA6AA0000-0x000001BAA6B16000-memory.dmp

Filesize
472KB

Download
memory/1828-34-0x000001BAA6B20000-0x000001BAA6B70000-memory.dmp

Filesize
320KB

Download
memory/1828-0-0x000001BA8C300000-0x000001BA8C340000-memory.dmp

Filesize
256KB

Download
memory/1828-1-0x00007FF9F9A53000-0x00007FF9F9A55000-memory.dmp

Filesize
8KB

Download
memory/4320-15-0x00007FF9F9A50000-0x00007FF9FA511000-memory.dmp

Filesize
10.8MB

Download
memory/4320-12-0x000001836E3B0000-0x000001836E3D2000-memory.dmp

Filesize
136KB

Download
memory/4320-14-0x00007FF9F9A50000-0x00007FF9FA511000-memory.dmp

Filesize
10.8MB

Download
memory/4320-13-0x00007FF9F9A50000-0x00007FF9FA511000-memory.dmp

Filesize
10.8MB

Download
memory/4320-18-0x00007FF9F9A50000-0x00007FF9FA511000-memory.dmp

Filesize
10.8MB

Download