umbral | b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b

Analysis

max time kernel
93s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-11-2024 14:25

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General

Target

b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
Size

229KB
MD5

63c8a7e1b6b7aceb3da5f2f6b0abc53a
SHA1

957f75df411f22c1076838f331c14d5e6e08ee31
SHA256

b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b
SHA512

e260c30ece30075f5efd0753ff8c9073be033571fc99e830bb08a30e071fd643d0fa796a78778491fcfabe479d6f7bae995dc432ff2d00f3b91753144639132a
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4giX9UgGhZq+fiQBFUuQb8e1mLucSUi4:foZtL+EP8gI9UgGhZq+fiQBFUT33d4

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1436-1-0x000001D595240000-0x000001D595280000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral

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
3596	powershell.exe
2244	powershell.exe
4116	powershell.exe
2384	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
24	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
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
2892	cmd.exe
1656	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4528	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1656	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
3596	powershell.exe
3596	powershell.exe
4116	powershell.exe
4116	powershell.exe
2384	powershell.exe
2384	powershell.exe
2996	powershell.exe
2996	powershell.exe
2244	powershell.exe
2244	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
Token: SeIncreaseQuotaPrivilege	3584	wmic.exe
Token: SeSecurityPrivilege	3584	wmic.exe
Token: SeTakeOwnershipPrivilege	3584	wmic.exe
Token: SeLoadDriverPrivilege	3584	wmic.exe
Token: SeSystemProfilePrivilege	3584	wmic.exe
Token: SeSystemtimePrivilege	3584	wmic.exe
Token: SeProfSingleProcessPrivilege	3584	wmic.exe
Token: SeIncBasePriorityPrivilege	3584	wmic.exe
Token: SeCreatePagefilePrivilege	3584	wmic.exe
Token: SeBackupPrivilege	3584	wmic.exe
Token: SeRestorePrivilege	3584	wmic.exe
Token: SeShutdownPrivilege	3584	wmic.exe
Token: SeDebugPrivilege	3584	wmic.exe
Token: SeSystemEnvironmentPrivilege	3584	wmic.exe
Token: SeRemoteShutdownPrivilege	3584	wmic.exe
Token: SeUndockPrivilege	3584	wmic.exe
Token: SeManageVolumePrivilege	3584	wmic.exe
Token: 33	3584	wmic.exe
Token: 34	3584	wmic.exe
Token: 35	3584	wmic.exe
Token: 36	3584	wmic.exe
Token: SeIncreaseQuotaPrivilege	3584	wmic.exe
Token: SeSecurityPrivilege	3584	wmic.exe
Token: SeTakeOwnershipPrivilege	3584	wmic.exe
Token: SeLoadDriverPrivilege	3584	wmic.exe
Token: SeSystemProfilePrivilege	3584	wmic.exe
Token: SeSystemtimePrivilege	3584	wmic.exe
Token: SeProfSingleProcessPrivilege	3584	wmic.exe
Token: SeIncBasePriorityPrivilege	3584	wmic.exe
Token: SeCreatePagefilePrivilege	3584	wmic.exe
Token: SeBackupPrivilege	3584	wmic.exe
Token: SeRestorePrivilege	3584	wmic.exe
Token: SeShutdownPrivilege	3584	wmic.exe
Token: SeDebugPrivilege	3584	wmic.exe
Token: SeSystemEnvironmentPrivilege	3584	wmic.exe
Token: SeRemoteShutdownPrivilege	3584	wmic.exe
Token: SeUndockPrivilege	3584	wmic.exe
Token: SeManageVolumePrivilege	3584	wmic.exe
Token: 33	3584	wmic.exe
Token: 34	3584	wmic.exe
Token: 35	3584	wmic.exe
Token: 36	3584	wmic.exe
Token: SeDebugPrivilege	3596	powershell.exe
Token: SeDebugPrivilege	4116	powershell.exe
Token: SeDebugPrivilege	2384	powershell.exe
Token: SeDebugPrivilege	2996	powershell.exe
Token: SeIncreaseQuotaPrivilege	4920	wmic.exe
Token: SeSecurityPrivilege	4920	wmic.exe
Token: SeTakeOwnershipPrivilege	4920	wmic.exe
Token: SeLoadDriverPrivilege	4920	wmic.exe
Token: SeSystemProfilePrivilege	4920	wmic.exe
Token: SeSystemtimePrivilege	4920	wmic.exe
Token: SeProfSingleProcessPrivilege	4920	wmic.exe
Token: SeIncBasePriorityPrivilege	4920	wmic.exe
Token: SeCreatePagefilePrivilege	4920	wmic.exe
Token: SeBackupPrivilege	4920	wmic.exe
Token: SeRestorePrivilege	4920	wmic.exe
Token: SeShutdownPrivilege	4920	wmic.exe
Token: SeDebugPrivilege	4920	wmic.exe
Token: SeSystemEnvironmentPrivilege	4920	wmic.exe
Token: SeRemoteShutdownPrivilege	4920	wmic.exe
Token: SeUndockPrivilege	4920	wmic.exe
Token: SeManageVolumePrivilege	4920	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 3584	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	83
PID 1436 wrote to memory of 3584	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	83
PID 1436 wrote to memory of 4204	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	86
PID 1436 wrote to memory of 4204	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	86
PID 1436 wrote to memory of 3596	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	88
PID 1436 wrote to memory of 3596	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	88
PID 1436 wrote to memory of 4116	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	90
PID 1436 wrote to memory of 4116	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	90
PID 1436 wrote to memory of 2384	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	92
PID 1436 wrote to memory of 2384	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	92
PID 1436 wrote to memory of 2996	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	94
PID 1436 wrote to memory of 2996	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	94
PID 1436 wrote to memory of 4920	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	96
PID 1436 wrote to memory of 4920	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	96
PID 1436 wrote to memory of 976	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	98
PID 1436 wrote to memory of 976	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	98
PID 1436 wrote to memory of 1184	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	102
PID 1436 wrote to memory of 1184	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	102
PID 1436 wrote to memory of 2244	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	105
PID 1436 wrote to memory of 2244	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	105
PID 1436 wrote to memory of 4528	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	107
PID 1436 wrote to memory of 4528	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	107
PID 1436 wrote to memory of 2892	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	112
PID 1436 wrote to memory of 2892	1436	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	112
PID 2892 wrote to memory of 1656	2892	cmd.exe	114
PID 2892 wrote to memory of 1656	2892	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4204	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
"C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1436
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3584
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe"
  2⤵
  - Views/modifies file attributes
  PID:4204
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3596
- 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:4116
- 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:2384
- 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:2996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1184
- 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:2244
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4528
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1656

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5f3a00d4.fkk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1436-70-0x000001D5AFA40000-0x000001D5AFA52000-memory.dmp

Filesize
72KB

Download
memory/1436-35-0x000001D5AF940000-0x000001D5AF95E000-memory.dmp

Filesize
120KB

Download
memory/1436-90-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/1436-69-0x000001D5AF910000-0x000001D5AF91A000-memory.dmp

Filesize
40KB

Download
memory/1436-2-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/1436-33-0x000001D5AF970000-0x000001D5AF9E6000-memory.dmp

Filesize
472KB

Download
memory/1436-34-0x000001D5AF9F0000-0x000001D5AFA40000-memory.dmp

Filesize
320KB

Download
memory/1436-0-0x00007FFD674E3000-0x00007FFD674E5000-memory.dmp

Filesize
8KB

Download
memory/1436-1-0x000001D595240000-0x000001D595280000-memory.dmp

Filesize
256KB

Download
memory/3596-15-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/3596-14-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/3596-3-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/3596-13-0x00000212528A0000-0x00000212528C2000-memory.dmp

Filesize
136KB

Download
memory/3596-18-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download