umbral | 683532c9ddccd09aac6480c255099963803eac956ea1d5597c772ff13a8a7a31

Analysis

max time kernel
108s
max time network
109s
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 16:20

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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
behavioral4/memory/4064-1-0x000001862B510000-0x000001862B550000-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
1732	powershell.exe
4820	powershell.exe
3532	powershell.exe
3480	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
23	discord.com
24	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
7	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
2972	cmd.exe
2784	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4252	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2784	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4064	BootstrapperV1.13.exe
1732	powershell.exe
1732	powershell.exe
4820	powershell.exe
4820	powershell.exe
3532	powershell.exe
3532	powershell.exe
2256	powershell.exe
2256	powershell.exe
3480	powershell.exe
3480	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	BootstrapperV1.13.exe
Token: SeIncreaseQuotaPrivilege	1040	wmic.exe
Token: SeSecurityPrivilege	1040	wmic.exe
Token: SeTakeOwnershipPrivilege	1040	wmic.exe
Token: SeLoadDriverPrivilege	1040	wmic.exe
Token: SeSystemProfilePrivilege	1040	wmic.exe
Token: SeSystemtimePrivilege	1040	wmic.exe
Token: SeProfSingleProcessPrivilege	1040	wmic.exe
Token: SeIncBasePriorityPrivilege	1040	wmic.exe
Token: SeCreatePagefilePrivilege	1040	wmic.exe
Token: SeBackupPrivilege	1040	wmic.exe
Token: SeRestorePrivilege	1040	wmic.exe
Token: SeShutdownPrivilege	1040	wmic.exe
Token: SeDebugPrivilege	1040	wmic.exe
Token: SeSystemEnvironmentPrivilege	1040	wmic.exe
Token: SeRemoteShutdownPrivilege	1040	wmic.exe
Token: SeUndockPrivilege	1040	wmic.exe
Token: SeManageVolumePrivilege	1040	wmic.exe
Token: 33	1040	wmic.exe
Token: 34	1040	wmic.exe
Token: 35	1040	wmic.exe
Token: 36	1040	wmic.exe
Token: SeIncreaseQuotaPrivilege	1040	wmic.exe
Token: SeSecurityPrivilege	1040	wmic.exe
Token: SeTakeOwnershipPrivilege	1040	wmic.exe
Token: SeLoadDriverPrivilege	1040	wmic.exe
Token: SeSystemProfilePrivilege	1040	wmic.exe
Token: SeSystemtimePrivilege	1040	wmic.exe
Token: SeProfSingleProcessPrivilege	1040	wmic.exe
Token: SeIncBasePriorityPrivilege	1040	wmic.exe
Token: SeCreatePagefilePrivilege	1040	wmic.exe
Token: SeBackupPrivilege	1040	wmic.exe
Token: SeRestorePrivilege	1040	wmic.exe
Token: SeShutdownPrivilege	1040	wmic.exe
Token: SeDebugPrivilege	1040	wmic.exe
Token: SeSystemEnvironmentPrivilege	1040	wmic.exe
Token: SeRemoteShutdownPrivilege	1040	wmic.exe
Token: SeUndockPrivilege	1040	wmic.exe
Token: SeManageVolumePrivilege	1040	wmic.exe
Token: 33	1040	wmic.exe
Token: 34	1040	wmic.exe
Token: 35	1040	wmic.exe
Token: 36	1040	wmic.exe
Token: SeDebugPrivilege	1732	powershell.exe
Token: SeDebugPrivilege	4820	powershell.exe
Token: SeDebugPrivilege	3532	powershell.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeIncreaseQuotaPrivilege	2380	wmic.exe
Token: SeSecurityPrivilege	2380	wmic.exe
Token: SeTakeOwnershipPrivilege	2380	wmic.exe
Token: SeLoadDriverPrivilege	2380	wmic.exe
Token: SeSystemProfilePrivilege	2380	wmic.exe
Token: SeSystemtimePrivilege	2380	wmic.exe
Token: SeProfSingleProcessPrivilege	2380	wmic.exe
Token: SeIncBasePriorityPrivilege	2380	wmic.exe
Token: SeCreatePagefilePrivilege	2380	wmic.exe
Token: SeBackupPrivilege	2380	wmic.exe
Token: SeRestorePrivilege	2380	wmic.exe
Token: SeShutdownPrivilege	2380	wmic.exe
Token: SeDebugPrivilege	2380	wmic.exe
Token: SeSystemEnvironmentPrivilege	2380	wmic.exe
Token: SeRemoteShutdownPrivilege	2380	wmic.exe
Token: SeUndockPrivilege	2380	wmic.exe
Token: SeManageVolumePrivilege	2380	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 1040	4064	BootstrapperV1.13.exe	83
PID 4064 wrote to memory of 1040	4064	BootstrapperV1.13.exe	83
PID 4064 wrote to memory of 1536	4064	BootstrapperV1.13.exe	90
PID 4064 wrote to memory of 1536	4064	BootstrapperV1.13.exe	90
PID 4064 wrote to memory of 1732	4064	BootstrapperV1.13.exe	92
PID 4064 wrote to memory of 1732	4064	BootstrapperV1.13.exe	92
PID 4064 wrote to memory of 4820	4064	BootstrapperV1.13.exe	94
PID 4064 wrote to memory of 4820	4064	BootstrapperV1.13.exe	94
PID 4064 wrote to memory of 3532	4064	BootstrapperV1.13.exe	96
PID 4064 wrote to memory of 3532	4064	BootstrapperV1.13.exe	96
PID 4064 wrote to memory of 2256	4064	BootstrapperV1.13.exe	98
PID 4064 wrote to memory of 2256	4064	BootstrapperV1.13.exe	98
PID 4064 wrote to memory of 2380	4064	BootstrapperV1.13.exe	100
PID 4064 wrote to memory of 2380	4064	BootstrapperV1.13.exe	100
PID 4064 wrote to memory of 3336	4064	BootstrapperV1.13.exe	102
PID 4064 wrote to memory of 3336	4064	BootstrapperV1.13.exe	102
PID 4064 wrote to memory of 4884	4064	BootstrapperV1.13.exe	104
PID 4064 wrote to memory of 4884	4064	BootstrapperV1.13.exe	104
PID 4064 wrote to memory of 3480	4064	BootstrapperV1.13.exe	106
PID 4064 wrote to memory of 3480	4064	BootstrapperV1.13.exe	106
PID 4064 wrote to memory of 4252	4064	BootstrapperV1.13.exe	108
PID 4064 wrote to memory of 4252	4064	BootstrapperV1.13.exe	108
PID 4064 wrote to memory of 2972	4064	BootstrapperV1.13.exe	110
PID 4064 wrote to memory of 2972	4064	BootstrapperV1.13.exe	110
PID 2972 wrote to memory of 2784	2972	cmd.exe	112
PID 2972 wrote to memory of 2784	2972	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1536	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:4064
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1040
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe"
  2⤵
  - Views/modifies file attributes
  PID:1536
- 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:1732
- 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:4820
- 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:3532
- 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:2256
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2380
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3336
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4884
- 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:3480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4252
- 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:2972
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2784

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
9c172d22fbbdafe12dfc5c909edea107

SHA1
9961cfc5a51f1d375186fc64bf98214bdc0cf2df

SHA256
315439a1131019ecb316a0344395624965a961baff563be19221620e6e3dc18d

SHA512
d459ca5a3abd05b5bff39056065e786eec0260cb83b03c774ab0b98f07dfc8ef7dd5db5f37c569ac0d531ebd640c6dc0aaefc407d357280e07b011e982b91e2d

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

Filesize
944B

MD5
6a422ceaef22287db5a6673e418abd82

SHA1
f806b7ac8aa45631b0a557f5a40a396a5ddee23c

SHA256
7c95718aee8255f063bfb64896eaccac1ffe549066c549d80ace8aaf23ff22b1

SHA512
b6dbc918af666418ac260b5f6502fe66d77141f78c277bda8e548f5975a3e0ba4f12f5c3124508f2228b0041daf3546a94a41a0a183be24fc22feeb98750003d

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
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
03bdcfc3c5e616b9d0efeb4abc339337

SHA1
f9f43f06a5592da63fb68e5247be5b58f6b480af

SHA256
8c00cd6305452a77038b506027837da886b49641ac5b3a5926b2b429ac5e4f41

SHA512
84302b7a2541402a6d1e388b398ff296c91b6aa7fa49818c4ade5ce8ec97297e0be1dc92b81b0e43c7b5e78c1c0795780563b8dd97092332536c4513fc15c7f8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_runglfo3.frl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1732-20-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download
memory/1732-10-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download
memory/1732-16-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download
memory/1732-17-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download
memory/1732-15-0x00000240FA590000-0x00000240FA5B2000-memory.dmp

Filesize
136KB

Download
memory/4064-35-0x0000018645C40000-0x0000018645CB6000-memory.dmp

Filesize
472KB

Download
memory/4064-4-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download
memory/4064-0-0x00007FFFE4A53000-0x00007FFFE4A55000-memory.dmp

Filesize
8KB

Download
memory/4064-36-0x0000018645CC0000-0x0000018645D10000-memory.dmp

Filesize
320KB

Download
memory/4064-37-0x0000018645BD0000-0x0000018645BEE000-memory.dmp

Filesize
120KB

Download
memory/4064-3-0x00007FFFE4A53000-0x00007FFFE4A55000-memory.dmp

Filesize
8KB

Download
memory/4064-2-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download
memory/4064-73-0x0000018645C00000-0x0000018645C0A000-memory.dmp

Filesize
40KB

Download
memory/4064-74-0x0000018645D10000-0x0000018645D22000-memory.dmp

Filesize
72KB

Download
memory/4064-1-0x000001862B510000-0x000001862B550000-memory.dmp

Filesize
256KB

Download
memory/4064-92-0x00007FFFE4A50000-0x00007FFFE5511000-memory.dmp

Filesize
10.8MB

Download