umbral | 683532c9ddccd09aac6480c255099963803eac956ea1d5597c772ff13a8a7a31

Analysis

max time kernel
433s
max time network
1155s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06-09-2024 16:16

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General

Target

BootstrapperV1.13.exe
Size

229KB
MD5

224b37147484176752b12af33b9efd96
SHA1

d2fbb87ff49e0e80e8585b449fac349688d02f23
SHA256

2133a2c5f4a04d8ffe1ea436d035917ad16c50fa011b021c95c71f2660e67033
SHA512

e374e69dad1b3ad39887163e6c8cd07a88e36b167b91b0eeb8a5296f7345ea4c97e6e8e009193b321524f5326118900933e4657b0177b702036525d42c508704
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4lePZsyVtG/TOMdRYz7b8e1m4i:foZtL+EP8lePZsyVtG/TOMdRYDu

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2916-1-0x00000268869D0000-0x0000026886A10000-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
3140	powershell.exe
404	powershell.exe
2148	powershell.exe
3684	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	BootstrapperV1.13.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
27	discord.com
26	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
12	ip-api.com

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
64	PING.EXE
3736	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1136	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
64	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2916	BootstrapperV1.13.exe
3140	powershell.exe
3140	powershell.exe
404	powershell.exe
404	powershell.exe
2148	powershell.exe
2148	powershell.exe
3028	powershell.exe
3028	powershell.exe
3684	powershell.exe
3684	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2916	BootstrapperV1.13.exe
Token: SeIncreaseQuotaPrivilege	3356	wmic.exe
Token: SeSecurityPrivilege	3356	wmic.exe
Token: SeTakeOwnershipPrivilege	3356	wmic.exe
Token: SeLoadDriverPrivilege	3356	wmic.exe
Token: SeSystemProfilePrivilege	3356	wmic.exe
Token: SeSystemtimePrivilege	3356	wmic.exe
Token: SeProfSingleProcessPrivilege	3356	wmic.exe
Token: SeIncBasePriorityPrivilege	3356	wmic.exe
Token: SeCreatePagefilePrivilege	3356	wmic.exe
Token: SeBackupPrivilege	3356	wmic.exe
Token: SeRestorePrivilege	3356	wmic.exe
Token: SeShutdownPrivilege	3356	wmic.exe
Token: SeDebugPrivilege	3356	wmic.exe
Token: SeSystemEnvironmentPrivilege	3356	wmic.exe
Token: SeRemoteShutdownPrivilege	3356	wmic.exe
Token: SeUndockPrivilege	3356	wmic.exe
Token: SeManageVolumePrivilege	3356	wmic.exe
Token: 33	3356	wmic.exe
Token: 34	3356	wmic.exe
Token: 35	3356	wmic.exe
Token: 36	3356	wmic.exe
Token: SeIncreaseQuotaPrivilege	3356	wmic.exe
Token: SeSecurityPrivilege	3356	wmic.exe
Token: SeTakeOwnershipPrivilege	3356	wmic.exe
Token: SeLoadDriverPrivilege	3356	wmic.exe
Token: SeSystemProfilePrivilege	3356	wmic.exe
Token: SeSystemtimePrivilege	3356	wmic.exe
Token: SeProfSingleProcessPrivilege	3356	wmic.exe
Token: SeIncBasePriorityPrivilege	3356	wmic.exe
Token: SeCreatePagefilePrivilege	3356	wmic.exe
Token: SeBackupPrivilege	3356	wmic.exe
Token: SeRestorePrivilege	3356	wmic.exe
Token: SeShutdownPrivilege	3356	wmic.exe
Token: SeDebugPrivilege	3356	wmic.exe
Token: SeSystemEnvironmentPrivilege	3356	wmic.exe
Token: SeRemoteShutdownPrivilege	3356	wmic.exe
Token: SeUndockPrivilege	3356	wmic.exe
Token: SeManageVolumePrivilege	3356	wmic.exe
Token: 33	3356	wmic.exe
Token: 34	3356	wmic.exe
Token: 35	3356	wmic.exe
Token: 36	3356	wmic.exe
Token: SeDebugPrivilege	3140	powershell.exe
Token: SeDebugPrivilege	404	powershell.exe
Token: SeDebugPrivilege	2148	powershell.exe
Token: SeDebugPrivilege	3028	powershell.exe
Token: SeIncreaseQuotaPrivilege	4944	wmic.exe
Token: SeSecurityPrivilege	4944	wmic.exe
Token: SeTakeOwnershipPrivilege	4944	wmic.exe
Token: SeLoadDriverPrivilege	4944	wmic.exe
Token: SeSystemProfilePrivilege	4944	wmic.exe
Token: SeSystemtimePrivilege	4944	wmic.exe
Token: SeProfSingleProcessPrivilege	4944	wmic.exe
Token: SeIncBasePriorityPrivilege	4944	wmic.exe
Token: SeCreatePagefilePrivilege	4944	wmic.exe
Token: SeBackupPrivilege	4944	wmic.exe
Token: SeRestorePrivilege	4944	wmic.exe
Token: SeShutdownPrivilege	4944	wmic.exe
Token: SeDebugPrivilege	4944	wmic.exe
Token: SeSystemEnvironmentPrivilege	4944	wmic.exe
Token: SeRemoteShutdownPrivilege	4944	wmic.exe
Token: SeUndockPrivilege	4944	wmic.exe
Token: SeManageVolumePrivilege	4944	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 3356	2916	BootstrapperV1.13.exe	87
PID 2916 wrote to memory of 3356	2916	BootstrapperV1.13.exe	87
PID 2916 wrote to memory of 1592	2916	BootstrapperV1.13.exe	90
PID 2916 wrote to memory of 1592	2916	BootstrapperV1.13.exe	90
PID 2916 wrote to memory of 3140	2916	BootstrapperV1.13.exe	92
PID 2916 wrote to memory of 3140	2916	BootstrapperV1.13.exe	92
PID 2916 wrote to memory of 404	2916	BootstrapperV1.13.exe	95
PID 2916 wrote to memory of 404	2916	BootstrapperV1.13.exe	95
PID 2916 wrote to memory of 2148	2916	BootstrapperV1.13.exe	99
PID 2916 wrote to memory of 2148	2916	BootstrapperV1.13.exe	99
PID 2916 wrote to memory of 3028	2916	BootstrapperV1.13.exe	101
PID 2916 wrote to memory of 3028	2916	BootstrapperV1.13.exe	101
PID 2916 wrote to memory of 4944	2916	BootstrapperV1.13.exe	104
PID 2916 wrote to memory of 4944	2916	BootstrapperV1.13.exe	104
PID 2916 wrote to memory of 2208	2916	BootstrapperV1.13.exe	106
PID 2916 wrote to memory of 2208	2916	BootstrapperV1.13.exe	106
PID 2916 wrote to memory of 2964	2916	BootstrapperV1.13.exe	108
PID 2916 wrote to memory of 2964	2916	BootstrapperV1.13.exe	108
PID 2916 wrote to memory of 3684	2916	BootstrapperV1.13.exe	110
PID 2916 wrote to memory of 3684	2916	BootstrapperV1.13.exe	110
PID 2916 wrote to memory of 1136	2916	BootstrapperV1.13.exe	112
PID 2916 wrote to memory of 1136	2916	BootstrapperV1.13.exe	112
PID 2916 wrote to memory of 3736	2916	BootstrapperV1.13.exe	115
PID 2916 wrote to memory of 3736	2916	BootstrapperV1.13.exe	115
PID 3736 wrote to memory of 64	3736	cmd.exe	117
PID 3736 wrote to memory of 64	3736	cmd.exe	117

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1592	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe
"C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3356
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe"
  2⤵
  - Views/modifies file attributes
  PID:1592
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3140
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:404
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2148
- 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:3028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4944
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2208
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2964
- C:\Windows\System32\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
  - Suspicious behavior: EnumeratesProcesses
  PID:3684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1136
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3736
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:64

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 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\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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
1a58f982c18490e622e00d4eb75ace5a

SHA1
60c30527b74659ecf09089a5a7c02a1df9a71b65

SHA256
4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

SHA512
ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
3c88cddf5f999df7457942136c983e9c

SHA1
9eb16fee051ed159865527795a6ee185abcb08d7

SHA256
dcb8d9e94dc107cebc89d24ba6c8a10507619a5faa7b8122820b4554b12d139a

SHA512
d06eb960828ea7668921347d502e95b0d4c6a34679c2ec322dd99b7c02dc135e60d4c09d6032ea81aa43b655cbd503f95b5c1990f38a04c3c256065613f3fbbb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2r3ozktv.tzf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2916-71-0x00000268A10C0000-0x00000268A10CA000-memory.dmp

Filesize
40KB

Download
memory/2916-35-0x00000268A10A0000-0x00000268A10BE000-memory.dmp

Filesize
120KB

Download
memory/2916-92-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download
memory/2916-88-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download
memory/2916-2-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download
memory/2916-33-0x00000268A1120000-0x00000268A1196000-memory.dmp

Filesize
472KB

Download
memory/2916-34-0x00000268A11A0000-0x00000268A11F0000-memory.dmp

Filesize
320KB

Download
memory/2916-85-0x00007FFA09743000-0x00007FFA09745000-memory.dmp

Filesize
8KB

Download
memory/2916-1-0x00000268869D0000-0x0000026886A10000-memory.dmp

Filesize
256KB

Download
memory/2916-0-0x00007FFA09743000-0x00007FFA09745000-memory.dmp

Filesize
8KB

Download
memory/2916-72-0x00000268A10F0000-0x00000268A1102000-memory.dmp

Filesize
72KB

Download
memory/3140-9-0x0000025E7B730000-0x0000025E7B752000-memory.dmp

Filesize
136KB

Download
memory/3140-10-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download
memory/3140-15-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download
memory/3140-3-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download
memory/3140-18-0x00007FFA09740000-0x00007FFA0A201000-memory.dmp

Filesize
10.8MB

Download