umbral | a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-12-2024 12:21

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General

Target

a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe
Size

231KB
MD5

230f75b72d5021a921637929a63cfd79
SHA1

71af2ee3489d49914f7c7fa4e16e8398e97e0fc8
SHA256

a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355
SHA512

3dc11aac2231daf30871d30f43eba3eadf14f3b003dd1f81466cde021b0b59d38c5e9a320e6705b4f5a0eeebf93f9ee5459173e20de2ab3ae3f3e9988819f001
SSDEEP

6144:xloZMUrIkd8g+EtXHkv/iD4b3gulGELnsyd42X3Wc8b8e1mDQi:DoZrL+EP8b3gulGELnsyd42X3WxYJ

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2648-1-0x00000000000E0000-0x0000000000120000-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
2672	powershell.exe
2608	powershell.exe
2384	powershell.exe
332	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe

Deletes itself 1 IoCs

pid	Process
2944	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
8	discord.com
9	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
2944	cmd.exe
2064	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1964	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2064	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2672	powershell.exe
2608	powershell.exe
2384	powershell.exe
1768	powershell.exe
332	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe
Token: SeDebugPrivilege	2672	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	2384	powershell.exe
Token: SeDebugPrivilege	1768	powershell.exe
Token: SeIncreaseQuotaPrivilege	2440	wmic.exe
Token: SeSecurityPrivilege	2440	wmic.exe
Token: SeTakeOwnershipPrivilege	2440	wmic.exe
Token: SeLoadDriverPrivilege	2440	wmic.exe
Token: SeSystemProfilePrivilege	2440	wmic.exe
Token: SeSystemtimePrivilege	2440	wmic.exe
Token: SeProfSingleProcessPrivilege	2440	wmic.exe
Token: SeIncBasePriorityPrivilege	2440	wmic.exe
Token: SeCreatePagefilePrivilege	2440	wmic.exe
Token: SeBackupPrivilege	2440	wmic.exe
Token: SeRestorePrivilege	2440	wmic.exe
Token: SeShutdownPrivilege	2440	wmic.exe
Token: SeDebugPrivilege	2440	wmic.exe
Token: SeSystemEnvironmentPrivilege	2440	wmic.exe
Token: SeRemoteShutdownPrivilege	2440	wmic.exe
Token: SeUndockPrivilege	2440	wmic.exe
Token: SeManageVolumePrivilege	2440	wmic.exe
Token: 33	2440	wmic.exe
Token: 34	2440	wmic.exe
Token: 35	2440	wmic.exe
Token: SeIncreaseQuotaPrivilege	2440	wmic.exe
Token: SeSecurityPrivilege	2440	wmic.exe
Token: SeTakeOwnershipPrivilege	2440	wmic.exe
Token: SeLoadDriverPrivilege	2440	wmic.exe
Token: SeSystemProfilePrivilege	2440	wmic.exe
Token: SeSystemtimePrivilege	2440	wmic.exe
Token: SeProfSingleProcessPrivilege	2440	wmic.exe
Token: SeIncBasePriorityPrivilege	2440	wmic.exe
Token: SeCreatePagefilePrivilege	2440	wmic.exe
Token: SeBackupPrivilege	2440	wmic.exe
Token: SeRestorePrivilege	2440	wmic.exe
Token: SeShutdownPrivilege	2440	wmic.exe
Token: SeDebugPrivilege	2440	wmic.exe
Token: SeSystemEnvironmentPrivilege	2440	wmic.exe
Token: SeRemoteShutdownPrivilege	2440	wmic.exe
Token: SeUndockPrivilege	2440	wmic.exe
Token: SeManageVolumePrivilege	2440	wmic.exe
Token: 33	2440	wmic.exe
Token: 34	2440	wmic.exe
Token: 35	2440	wmic.exe
Token: SeIncreaseQuotaPrivilege	2860	wmic.exe
Token: SeSecurityPrivilege	2860	wmic.exe
Token: SeTakeOwnershipPrivilege	2860	wmic.exe
Token: SeLoadDriverPrivilege	2860	wmic.exe
Token: SeSystemProfilePrivilege	2860	wmic.exe
Token: SeSystemtimePrivilege	2860	wmic.exe
Token: SeProfSingleProcessPrivilege	2860	wmic.exe
Token: SeIncBasePriorityPrivilege	2860	wmic.exe
Token: SeCreatePagefilePrivilege	2860	wmic.exe
Token: SeBackupPrivilege	2860	wmic.exe
Token: SeRestorePrivilege	2860	wmic.exe
Token: SeShutdownPrivilege	2860	wmic.exe
Token: SeDebugPrivilege	2860	wmic.exe
Token: SeSystemEnvironmentPrivilege	2860	wmic.exe
Token: SeRemoteShutdownPrivilege	2860	wmic.exe
Token: SeUndockPrivilege	2860	wmic.exe
Token: SeManageVolumePrivilege	2860	wmic.exe
Token: 33	2860	wmic.exe
Token: 34	2860	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2680	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	30
PID 2648 wrote to memory of 2680	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	30
PID 2648 wrote to memory of 2680	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	30
PID 2648 wrote to memory of 2672	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	32
PID 2648 wrote to memory of 2672	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	32
PID 2648 wrote to memory of 2672	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	32
PID 2648 wrote to memory of 2608	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	34
PID 2648 wrote to memory of 2608	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	34
PID 2648 wrote to memory of 2608	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	34
PID 2648 wrote to memory of 2384	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	36
PID 2648 wrote to memory of 2384	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	36
PID 2648 wrote to memory of 2384	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	36
PID 2648 wrote to memory of 1768	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	38
PID 2648 wrote to memory of 1768	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	38
PID 2648 wrote to memory of 1768	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	38
PID 2648 wrote to memory of 2440	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	40
PID 2648 wrote to memory of 2440	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	40
PID 2648 wrote to memory of 2440	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	40
PID 2648 wrote to memory of 2860	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	43
PID 2648 wrote to memory of 2860	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	43
PID 2648 wrote to memory of 2860	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	43
PID 2648 wrote to memory of 2140	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	45
PID 2648 wrote to memory of 2140	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	45
PID 2648 wrote to memory of 2140	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	45
PID 2648 wrote to memory of 332	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	47
PID 2648 wrote to memory of 332	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	47
PID 2648 wrote to memory of 332	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	47
PID 2648 wrote to memory of 1964	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	49
PID 2648 wrote to memory of 1964	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	49
PID 2648 wrote to memory of 1964	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	49
PID 2648 wrote to memory of 2944	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	51
PID 2648 wrote to memory of 2944	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	51
PID 2648 wrote to memory of 2944	2648	a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe	51
PID 2944 wrote to memory of 2064	2944	cmd.exe	53
PID 2944 wrote to memory of 2064	2944	cmd.exe	53
PID 2944 wrote to memory of 2064	2944	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2680	attrib.exe

C:\Users\Admin\AppData\Local\Temp\a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe
"C:\Users\Admin\AppData\Local\Temp\a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe"
  2⤵
  - Views/modifies file attributes
  PID:2680
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2672
- 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:2608
- 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:1768
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2140
- 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:332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1964
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\a5011c165dbd8459396a3b4f901c7faa668e95e395fb12d7c967c34c0d974355.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2944
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2064

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
5172dcfd06919d025c773302d6676375

SHA1
a24831c70ad4dcc596062701426d309f7f3167dc

SHA256
257ab5366304454fa4dfd433f29fc021523cc0f8d486c6bccc3e7751ba9e5620

SHA512
c767b80bd5f265504bdcfe2d738215fe7c83a4947158befe7d8b11a4c786dd672d8c7c425bf32b8113e3311cdb9c3fa49fe7295e3e454060a8a4a09e520b472e

Download Submit
memory/332-47-0x000000001B7F0000-0x000000001BAD2000-memory.dmp

Filesize
2.9MB

Download
memory/2608-18-0x000000001B7E0000-0x000000001BAC2000-memory.dmp

Filesize
2.9MB

Download
memory/2608-19-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download
memory/2648-1-0x00000000000E0000-0x0000000000120000-memory.dmp

Filesize
256KB

Download
memory/2648-2-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2648-51-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2648-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/2672-8-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2672-12-0x000007FEEDAE0000-0x000007FEEE47D000-memory.dmp

Filesize
9.6MB

Download
memory/2672-10-0x0000000002934000-0x0000000002937000-memory.dmp

Filesize
12KB

Download
memory/2672-11-0x000000000293B000-0x00000000029A2000-memory.dmp

Filesize
412KB

Download
memory/2672-9-0x0000000002780000-0x0000000002788000-memory.dmp

Filesize
32KB

Download
memory/2672-7-0x000007FEEDD9E000-0x000007FEEDD9F000-memory.dmp

Filesize
4KB

Download
memory/2672-52-0x000007FEEDAE0000-0x000007FEEE47D000-memory.dmp

Filesize
9.6MB

Download