umbral | 28fda1422979b63fd9b489a76cf5e43e68aa095eae547e96f050550b37208cab

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-11-2024 04:29

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General

Target

osintool.exe
Size

632KB
MD5

20181934a508ec23e7c2223be3c58e3b
SHA1

a29f3f89d10ff05f4589466bc11a2fd45016e0e5
SHA256

28fda1422979b63fd9b489a76cf5e43e68aa095eae547e96f050550b37208cab
SHA512

8f0a1dfa0e627d7779754cd045dc9dcaedbcb332870962706a9bbcc69d9383c8166c940844047ba4a85e3209f5bf0d284f7e84e67345347f8f2c21d93ef043f7
SSDEEP

12288:hoZtL+EP8shN9rI8jS67NokRq8zNiMdRC:fI8iN9rI8jS67NokRlBiMdA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3068-1-0x0000000001190000-0x0000000001234000-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
2584	powershell.exe
2184	powershell.exe
2248	powershell.exe
2996	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
580	cmd.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
9	discord.com
10	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
6	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
580	cmd.exe
444	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3016	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
444	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3068	osintool.exe
2584	powershell.exe
2996	powershell.exe
2184	powershell.exe
1652	powershell.exe
2248	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	osintool.exe
Token: SeIncreaseQuotaPrivilege	2672	wmic.exe
Token: SeSecurityPrivilege	2672	wmic.exe
Token: SeTakeOwnershipPrivilege	2672	wmic.exe
Token: SeLoadDriverPrivilege	2672	wmic.exe
Token: SeSystemProfilePrivilege	2672	wmic.exe
Token: SeSystemtimePrivilege	2672	wmic.exe
Token: SeProfSingleProcessPrivilege	2672	wmic.exe
Token: SeIncBasePriorityPrivilege	2672	wmic.exe
Token: SeCreatePagefilePrivilege	2672	wmic.exe
Token: SeBackupPrivilege	2672	wmic.exe
Token: SeRestorePrivilege	2672	wmic.exe
Token: SeShutdownPrivilege	2672	wmic.exe
Token: SeDebugPrivilege	2672	wmic.exe
Token: SeSystemEnvironmentPrivilege	2672	wmic.exe
Token: SeRemoteShutdownPrivilege	2672	wmic.exe
Token: SeUndockPrivilege	2672	wmic.exe
Token: SeManageVolumePrivilege	2672	wmic.exe
Token: 33	2672	wmic.exe
Token: 34	2672	wmic.exe
Token: 35	2672	wmic.exe
Token: SeIncreaseQuotaPrivilege	2672	wmic.exe
Token: SeSecurityPrivilege	2672	wmic.exe
Token: SeTakeOwnershipPrivilege	2672	wmic.exe
Token: SeLoadDriverPrivilege	2672	wmic.exe
Token: SeSystemProfilePrivilege	2672	wmic.exe
Token: SeSystemtimePrivilege	2672	wmic.exe
Token: SeProfSingleProcessPrivilege	2672	wmic.exe
Token: SeIncBasePriorityPrivilege	2672	wmic.exe
Token: SeCreatePagefilePrivilege	2672	wmic.exe
Token: SeBackupPrivilege	2672	wmic.exe
Token: SeRestorePrivilege	2672	wmic.exe
Token: SeShutdownPrivilege	2672	wmic.exe
Token: SeDebugPrivilege	2672	wmic.exe
Token: SeSystemEnvironmentPrivilege	2672	wmic.exe
Token: SeRemoteShutdownPrivilege	2672	wmic.exe
Token: SeUndockPrivilege	2672	wmic.exe
Token: SeManageVolumePrivilege	2672	wmic.exe
Token: 33	2672	wmic.exe
Token: 34	2672	wmic.exe
Token: 35	2672	wmic.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	2996	powershell.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	1652	powershell.exe
Token: SeIncreaseQuotaPrivilege	1004	wmic.exe
Token: SeSecurityPrivilege	1004	wmic.exe
Token: SeTakeOwnershipPrivilege	1004	wmic.exe
Token: SeLoadDriverPrivilege	1004	wmic.exe
Token: SeSystemProfilePrivilege	1004	wmic.exe
Token: SeSystemtimePrivilege	1004	wmic.exe
Token: SeProfSingleProcessPrivilege	1004	wmic.exe
Token: SeIncBasePriorityPrivilege	1004	wmic.exe
Token: SeCreatePagefilePrivilege	1004	wmic.exe
Token: SeBackupPrivilege	1004	wmic.exe
Token: SeRestorePrivilege	1004	wmic.exe
Token: SeShutdownPrivilege	1004	wmic.exe
Token: SeDebugPrivilege	1004	wmic.exe
Token: SeSystemEnvironmentPrivilege	1004	wmic.exe
Token: SeRemoteShutdownPrivilege	1004	wmic.exe
Token: SeUndockPrivilege	1004	wmic.exe
Token: SeManageVolumePrivilege	1004	wmic.exe
Token: 33	1004	wmic.exe
Token: 34	1004	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2672	3068	osintool.exe	30
PID 3068 wrote to memory of 2672	3068	osintool.exe	30
PID 3068 wrote to memory of 2672	3068	osintool.exe	30
PID 3068 wrote to memory of 2676	3068	osintool.exe	33
PID 3068 wrote to memory of 2676	3068	osintool.exe	33
PID 3068 wrote to memory of 2676	3068	osintool.exe	33
PID 3068 wrote to memory of 2584	3068	osintool.exe	35
PID 3068 wrote to memory of 2584	3068	osintool.exe	35
PID 3068 wrote to memory of 2584	3068	osintool.exe	35
PID 3068 wrote to memory of 2996	3068	osintool.exe	37
PID 3068 wrote to memory of 2996	3068	osintool.exe	37
PID 3068 wrote to memory of 2996	3068	osintool.exe	37
PID 3068 wrote to memory of 2184	3068	osintool.exe	39
PID 3068 wrote to memory of 2184	3068	osintool.exe	39
PID 3068 wrote to memory of 2184	3068	osintool.exe	39
PID 3068 wrote to memory of 1652	3068	osintool.exe	41
PID 3068 wrote to memory of 1652	3068	osintool.exe	41
PID 3068 wrote to memory of 1652	3068	osintool.exe	41
PID 3068 wrote to memory of 1004	3068	osintool.exe	43
PID 3068 wrote to memory of 1004	3068	osintool.exe	43
PID 3068 wrote to memory of 1004	3068	osintool.exe	43
PID 3068 wrote to memory of 2900	3068	osintool.exe	45
PID 3068 wrote to memory of 2900	3068	osintool.exe	45
PID 3068 wrote to memory of 2900	3068	osintool.exe	45
PID 3068 wrote to memory of 2228	3068	osintool.exe	47
PID 3068 wrote to memory of 2228	3068	osintool.exe	47
PID 3068 wrote to memory of 2228	3068	osintool.exe	47
PID 3068 wrote to memory of 2248	3068	osintool.exe	49
PID 3068 wrote to memory of 2248	3068	osintool.exe	49
PID 3068 wrote to memory of 2248	3068	osintool.exe	49
PID 3068 wrote to memory of 3016	3068	osintool.exe	51
PID 3068 wrote to memory of 3016	3068	osintool.exe	51
PID 3068 wrote to memory of 3016	3068	osintool.exe	51
PID 3068 wrote to memory of 580	3068	osintool.exe	53
PID 3068 wrote to memory of 580	3068	osintool.exe	53
PID 3068 wrote to memory of 580	3068	osintool.exe	53
PID 580 wrote to memory of 444	580	cmd.exe	55
PID 580 wrote to memory of 444	580	cmd.exe	55
PID 580 wrote to memory of 444	580	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2676	attrib.exe

C:\Users\Admin\AppData\Local\Temp\osintool.exe
"C:\Users\Admin\AppData\Local\Temp\osintool.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2672
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\osintool.exe"
  2⤵
  - Views/modifies file attributes
  PID:2676
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\osintool.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- 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:2996
- 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:2184
- 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:1652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2900
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2228
- 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:2248
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3016
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\osintool.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:580
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:444

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
edc7b97b1479982ba683bdfdd916b806

SHA1
32613954f76b8308c38a2f94a79530132e5edf86

SHA256
e22c757d72ffb87cafabfea20da15e0692bd74588c74ce19f2edc3d7cb9d31be

SHA512
cdff231d54e2202d29205bb907faf039a6ffbeefbdb85aa1b7252c9be1aca4cddec109bdc170efb7431aa286d6a753d0462af04d42567ff3311af780c6413ef6

Download Submit
memory/2248-42-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2584-7-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/2584-8-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download
memory/2996-14-0x000000001B870000-0x000000001BB52000-memory.dmp

Filesize
2.9MB

Download
memory/2996-15-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/3068-0-0x000007FEF4D23000-0x000007FEF4D24000-memory.dmp

Filesize
4KB

Download
memory/3068-1-0x0000000001190000-0x0000000001234000-memory.dmp

Filesize
656KB

Download
memory/3068-2-0x000007FEF4D20000-0x000007FEF570C000-memory.dmp

Filesize
9.9MB

Download
memory/3068-46-0x000007FEF4D20000-0x000007FEF570C000-memory.dmp

Filesize
9.9MB

Download