umbral | 0a138d71d9cdd9c772628844181e087bc8f2f650e37702f131a32bf8d790867c

Analysis

max time kernel
25s
max time network
27s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
27-08-2024 20:18

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Reason

Machine shutdown

Report Analysis Logs

General

Target

fn.exe
Size

231KB
MD5

dd37f3db081031f72358bb3b9edf4e21
SHA1

256023f67c0f6e3717d1e9a338187c33d16b6574
SHA256

0a138d71d9cdd9c772628844181e087bc8f2f650e37702f131a32bf8d790867c
SHA512

08f1776d67fbef2d4139031abd5fdbd953e8312d54563883b4c45df3dc4376356e24be7a84b47e20d6c9c20f771ce8b7fce4f8468c046743a77a7f4893dd812c
SSDEEP

6144:xloZMzrIkd8g+EtXHkv/iD4lDkgJX8QfP+nJUg1Nvmb8e1m6Fi:DoZcL+EP8lDkgJX8QfP+nJUg1sQ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2244-1-0x0000000000C50000-0x0000000000C90000-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
2988	powershell.exe
940	powershell.exe
2788	powershell.exe
2844	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1420	cmd.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
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
1072	PING.EXE
1420	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2848	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1072	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2244	fn.exe
2988	powershell.exe
940	powershell.exe
2788	powershell.exe
2676	powershell.exe
2844	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	fn.exe
Token: SeIncreaseQuotaPrivilege	1752	wmic.exe
Token: SeSecurityPrivilege	1752	wmic.exe
Token: SeTakeOwnershipPrivilege	1752	wmic.exe
Token: SeLoadDriverPrivilege	1752	wmic.exe
Token: SeSystemProfilePrivilege	1752	wmic.exe
Token: SeSystemtimePrivilege	1752	wmic.exe
Token: SeProfSingleProcessPrivilege	1752	wmic.exe
Token: SeIncBasePriorityPrivilege	1752	wmic.exe
Token: SeCreatePagefilePrivilege	1752	wmic.exe
Token: SeBackupPrivilege	1752	wmic.exe
Token: SeRestorePrivilege	1752	wmic.exe
Token: SeShutdownPrivilege	1752	wmic.exe
Token: SeDebugPrivilege	1752	wmic.exe
Token: SeSystemEnvironmentPrivilege	1752	wmic.exe
Token: SeRemoteShutdownPrivilege	1752	wmic.exe
Token: SeUndockPrivilege	1752	wmic.exe
Token: SeManageVolumePrivilege	1752	wmic.exe
Token: 33	1752	wmic.exe
Token: 34	1752	wmic.exe
Token: 35	1752	wmic.exe
Token: SeIncreaseQuotaPrivilege	1752	wmic.exe
Token: SeSecurityPrivilege	1752	wmic.exe
Token: SeTakeOwnershipPrivilege	1752	wmic.exe
Token: SeLoadDriverPrivilege	1752	wmic.exe
Token: SeSystemProfilePrivilege	1752	wmic.exe
Token: SeSystemtimePrivilege	1752	wmic.exe
Token: SeProfSingleProcessPrivilege	1752	wmic.exe
Token: SeIncBasePriorityPrivilege	1752	wmic.exe
Token: SeCreatePagefilePrivilege	1752	wmic.exe
Token: SeBackupPrivilege	1752	wmic.exe
Token: SeRestorePrivilege	1752	wmic.exe
Token: SeShutdownPrivilege	1752	wmic.exe
Token: SeDebugPrivilege	1752	wmic.exe
Token: SeSystemEnvironmentPrivilege	1752	wmic.exe
Token: SeRemoteShutdownPrivilege	1752	wmic.exe
Token: SeUndockPrivilege	1752	wmic.exe
Token: SeManageVolumePrivilege	1752	wmic.exe
Token: 33	1752	wmic.exe
Token: 34	1752	wmic.exe
Token: 35	1752	wmic.exe
Token: SeDebugPrivilege	2988	powershell.exe
Token: SeDebugPrivilege	940	powershell.exe
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeIncreaseQuotaPrivilege	1644	wmic.exe
Token: SeSecurityPrivilege	1644	wmic.exe
Token: SeTakeOwnershipPrivilege	1644	wmic.exe
Token: SeLoadDriverPrivilege	1644	wmic.exe
Token: SeSystemProfilePrivilege	1644	wmic.exe
Token: SeSystemtimePrivilege	1644	wmic.exe
Token: SeProfSingleProcessPrivilege	1644	wmic.exe
Token: SeIncBasePriorityPrivilege	1644	wmic.exe
Token: SeCreatePagefilePrivilege	1644	wmic.exe
Token: SeBackupPrivilege	1644	wmic.exe
Token: SeRestorePrivilege	1644	wmic.exe
Token: SeShutdownPrivilege	1644	wmic.exe
Token: SeDebugPrivilege	1644	wmic.exe
Token: SeSystemEnvironmentPrivilege	1644	wmic.exe
Token: SeRemoteShutdownPrivilege	1644	wmic.exe
Token: SeUndockPrivilege	1644	wmic.exe
Token: SeManageVolumePrivilege	1644	wmic.exe
Token: 33	1644	wmic.exe
Token: 34	1644	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 1752	2244	fn.exe	29
PID 2244 wrote to memory of 1752	2244	fn.exe	29
PID 2244 wrote to memory of 1752	2244	fn.exe	29
PID 2244 wrote to memory of 1968	2244	fn.exe	32
PID 2244 wrote to memory of 1968	2244	fn.exe	32
PID 2244 wrote to memory of 1968	2244	fn.exe	32
PID 2244 wrote to memory of 2988	2244	fn.exe	34
PID 2244 wrote to memory of 2988	2244	fn.exe	34
PID 2244 wrote to memory of 2988	2244	fn.exe	34
PID 2244 wrote to memory of 940	2244	fn.exe	36
PID 2244 wrote to memory of 940	2244	fn.exe	36
PID 2244 wrote to memory of 940	2244	fn.exe	36
PID 2244 wrote to memory of 2788	2244	fn.exe	38
PID 2244 wrote to memory of 2788	2244	fn.exe	38
PID 2244 wrote to memory of 2788	2244	fn.exe	38
PID 2244 wrote to memory of 2676	2244	fn.exe	40
PID 2244 wrote to memory of 2676	2244	fn.exe	40
PID 2244 wrote to memory of 2676	2244	fn.exe	40
PID 2244 wrote to memory of 1644	2244	fn.exe	42
PID 2244 wrote to memory of 1644	2244	fn.exe	42
PID 2244 wrote to memory of 1644	2244	fn.exe	42
PID 2244 wrote to memory of 2468	2244	fn.exe	44
PID 2244 wrote to memory of 2468	2244	fn.exe	44
PID 2244 wrote to memory of 2468	2244	fn.exe	44
PID 2244 wrote to memory of 2960	2244	fn.exe	46
PID 2244 wrote to memory of 2960	2244	fn.exe	46
PID 2244 wrote to memory of 2960	2244	fn.exe	46
PID 2244 wrote to memory of 2844	2244	fn.exe	48
PID 2244 wrote to memory of 2844	2244	fn.exe	48
PID 2244 wrote to memory of 2844	2244	fn.exe	48
PID 2244 wrote to memory of 2848	2244	fn.exe	50
PID 2244 wrote to memory of 2848	2244	fn.exe	50
PID 2244 wrote to memory of 2848	2244	fn.exe	50
PID 2244 wrote to memory of 1420	2244	fn.exe	52
PID 2244 wrote to memory of 1420	2244	fn.exe	52
PID 2244 wrote to memory of 1420	2244	fn.exe	52
PID 1420 wrote to memory of 1072	1420	cmd.exe	54
PID 1420 wrote to memory of 1072	1420	cmd.exe	54
PID 1420 wrote to memory of 1072	1420	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1968	attrib.exe

C:\Users\Admin\AppData\Local\Temp\fn.exe
"C:\Users\Admin\AppData\Local\Temp\fn.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1752
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\fn.exe"
  2⤵
  - Views/modifies file attributes
  PID:1968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\fn.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2988
- 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:940
- 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:2788
- 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:2676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1644
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2468
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2960
- 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:2844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2848
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\fn.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1420
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1072

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:1236

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x4e8
1⤵
PID:2284

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1444

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
69743b77cbdcc625811f9d0fd22e3cb8

SHA1
b7e010f757766b9f6d0586a8c843fc822c489a63

SHA256
7c2cf1b79e8749430a8e9ede61903b6c57bf198e5eee1c0753cbb82728b3d4ab

SHA512
be02966c7aa27b65b41ff3f3a513fabf70f1dad028de15f3fd8c949c193201d308da171f7fa826b21d70fc2e46c47a85a11aeca5e9f5b58889ac8c125db5bb79

Download Submit
memory/940-14-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/940-15-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2244-0-0x000007FEF6173000-0x000007FEF6174000-memory.dmp

Filesize
4KB

Download
memory/2244-1-0x0000000000C50000-0x0000000000C90000-memory.dmp

Filesize
256KB

Download
memory/2244-2-0x000007FEF6170000-0x000007FEF6B5C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-43-0x000007FEF6170000-0x000007FEF6B5C000-memory.dmp

Filesize
9.9MB

Download
memory/2844-39-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2988-7-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/2988-8-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download