umbral | 351cba23cab65cd57d5ec9e553bfa02d35a32a8f75467a75b1c3735b87af6a3d

Resubmissions

04-07-2024 13:03

240704-qaf1tsxckj 10

04-07-2024 12:47

240704-p1mqmaxbjr 10

Analysis

max time kernel
146s
max time network
118s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
04-07-2024 12:47

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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

resource	yara_rule
behavioral2/memory/1808-0-0x0000018060500000-0x0000018060540000-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
3380	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
24	discord.com
27	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
10	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2964	wmic.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1808	solarabootstrapper.exe
3380	powershell.exe
3380	powershell.exe
2924	powershell.exe
2924	powershell.exe
716	powershell.exe
716	powershell.exe
1704	powershell.exe
1704	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1808	solarabootstrapper.exe
Token: SeIncreaseQuotaPrivilege	2272	wmic.exe
Token: SeSecurityPrivilege	2272	wmic.exe
Token: SeTakeOwnershipPrivilege	2272	wmic.exe
Token: SeLoadDriverPrivilege	2272	wmic.exe
Token: SeSystemProfilePrivilege	2272	wmic.exe
Token: SeSystemtimePrivilege	2272	wmic.exe
Token: SeProfSingleProcessPrivilege	2272	wmic.exe
Token: SeIncBasePriorityPrivilege	2272	wmic.exe
Token: SeCreatePagefilePrivilege	2272	wmic.exe
Token: SeBackupPrivilege	2272	wmic.exe
Token: SeRestorePrivilege	2272	wmic.exe
Token: SeShutdownPrivilege	2272	wmic.exe
Token: SeDebugPrivilege	2272	wmic.exe
Token: SeSystemEnvironmentPrivilege	2272	wmic.exe
Token: SeRemoteShutdownPrivilege	2272	wmic.exe
Token: SeUndockPrivilege	2272	wmic.exe
Token: SeManageVolumePrivilege	2272	wmic.exe
Token: 33	2272	wmic.exe
Token: 34	2272	wmic.exe
Token: 35	2272	wmic.exe
Token: 36	2272	wmic.exe
Token: SeIncreaseQuotaPrivilege	2272	wmic.exe
Token: SeSecurityPrivilege	2272	wmic.exe
Token: SeTakeOwnershipPrivilege	2272	wmic.exe
Token: SeLoadDriverPrivilege	2272	wmic.exe
Token: SeSystemProfilePrivilege	2272	wmic.exe
Token: SeSystemtimePrivilege	2272	wmic.exe
Token: SeProfSingleProcessPrivilege	2272	wmic.exe
Token: SeIncBasePriorityPrivilege	2272	wmic.exe
Token: SeCreatePagefilePrivilege	2272	wmic.exe
Token: SeBackupPrivilege	2272	wmic.exe
Token: SeRestorePrivilege	2272	wmic.exe
Token: SeShutdownPrivilege	2272	wmic.exe
Token: SeDebugPrivilege	2272	wmic.exe
Token: SeSystemEnvironmentPrivilege	2272	wmic.exe
Token: SeRemoteShutdownPrivilege	2272	wmic.exe
Token: SeUndockPrivilege	2272	wmic.exe
Token: SeManageVolumePrivilege	2272	wmic.exe
Token: 33	2272	wmic.exe
Token: 34	2272	wmic.exe
Token: 35	2272	wmic.exe
Token: 36	2272	wmic.exe
Token: SeDebugPrivilege	3380	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	716	powershell.exe
Token: SeDebugPrivilege	1704	powershell.exe
Token: SeIncreaseQuotaPrivilege	3520	wmic.exe
Token: SeSecurityPrivilege	3520	wmic.exe
Token: SeTakeOwnershipPrivilege	3520	wmic.exe
Token: SeLoadDriverPrivilege	3520	wmic.exe
Token: SeSystemProfilePrivilege	3520	wmic.exe
Token: SeSystemtimePrivilege	3520	wmic.exe
Token: SeProfSingleProcessPrivilege	3520	wmic.exe
Token: SeIncBasePriorityPrivilege	3520	wmic.exe
Token: SeCreatePagefilePrivilege	3520	wmic.exe
Token: SeBackupPrivilege	3520	wmic.exe
Token: SeRestorePrivilege	3520	wmic.exe
Token: SeShutdownPrivilege	3520	wmic.exe
Token: SeDebugPrivilege	3520	wmic.exe
Token: SeSystemEnvironmentPrivilege	3520	wmic.exe
Token: SeRemoteShutdownPrivilege	3520	wmic.exe
Token: SeUndockPrivilege	3520	wmic.exe
Token: SeManageVolumePrivilege	3520	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 2272	1808	solarabootstrapper.exe	84
PID 1808 wrote to memory of 2272	1808	solarabootstrapper.exe	84
PID 1808 wrote to memory of 3380	1808	solarabootstrapper.exe	89
PID 1808 wrote to memory of 3380	1808	solarabootstrapper.exe	89
PID 1808 wrote to memory of 2924	1808	solarabootstrapper.exe	91
PID 1808 wrote to memory of 2924	1808	solarabootstrapper.exe	91
PID 1808 wrote to memory of 716	1808	solarabootstrapper.exe	95
PID 1808 wrote to memory of 716	1808	solarabootstrapper.exe	95
PID 1808 wrote to memory of 1704	1808	solarabootstrapper.exe	97
PID 1808 wrote to memory of 1704	1808	solarabootstrapper.exe	97
PID 1808 wrote to memory of 3520	1808	solarabootstrapper.exe	100
PID 1808 wrote to memory of 3520	1808	solarabootstrapper.exe	100
PID 1808 wrote to memory of 3756	1808	solarabootstrapper.exe	102
PID 1808 wrote to memory of 3756	1808	solarabootstrapper.exe	102
PID 1808 wrote to memory of 4632	1808	solarabootstrapper.exe	104
PID 1808 wrote to memory of 4632	1808	solarabootstrapper.exe	104
PID 1808 wrote to memory of 5044	1808	solarabootstrapper.exe	106
PID 1808 wrote to memory of 5044	1808	solarabootstrapper.exe	106
PID 1808 wrote to memory of 2964	1808	solarabootstrapper.exe	108
PID 1808 wrote to memory of 2964	1808	solarabootstrapper.exe	108

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:1808
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2272
- 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:3380
- 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:2924
- 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:716
- 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:1704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3520
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4632
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  PID:5044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2964

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2752

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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\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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q3zgz02s.ssv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1808-34-0x000001807ABF0000-0x000001807AC40000-memory.dmp

Filesize
320KB

Download
memory/1808-1-0x00007FFDAABB3000-0x00007FFDAABB5000-memory.dmp

Filesize
8KB

Download
memory/1808-82-0x00007FFDAABB0000-0x00007FFDAB671000-memory.dmp

Filesize
10.8MB

Download
memory/1808-73-0x000001807ACF0000-0x000001807AD02000-memory.dmp

Filesize
72KB

Download
memory/1808-72-0x000001807AC40000-0x000001807AC4A000-memory.dmp

Filesize
40KB

Download
memory/1808-2-0x00007FFDAABB0000-0x00007FFDAB671000-memory.dmp

Filesize
10.8MB

Download
memory/1808-33-0x000001807AC70000-0x000001807ACE6000-memory.dmp

Filesize
472KB

Download
memory/1808-0-0x0000018060500000-0x0000018060540000-memory.dmp

Filesize
256KB

Download
memory/1808-35-0x0000018062190000-0x00000180621AE000-memory.dmp

Filesize
120KB

Download
memory/3380-10-0x000002BFA9840000-0x000002BFA9862000-memory.dmp

Filesize
136KB

Download
memory/3380-14-0x00007FFDAABB0000-0x00007FFDAB671000-memory.dmp

Filesize
10.8MB

Download
memory/3380-3-0x00007FFDAABB0000-0x00007FFDAB671000-memory.dmp

Filesize
10.8MB

Download
memory/3380-18-0x00007FFDAABB0000-0x00007FFDAB671000-memory.dmp

Filesize
10.8MB

Download
memory/3380-15-0x00007FFDAABB0000-0x00007FFDAB671000-memory.dmp

Filesize
10.8MB

Download