umbral | ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-09-2024 03:27

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General

Target

ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe
Size

229KB
MD5

7722bd38c1dc5357e24a8e33241b7609
SHA1

b4001c1953b0cb3e7acf2d6009342390f5e42724
SHA256

ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074
SHA512

215829e0897f1027944421cc2a2ed1122ab3fd8f1dea84631e7d22b27d9a7e61c0316f62762bfa90feb0dabec1e5389bb1b0b8bcc80b58b34cd910b2b52e5e86
SSDEEP

6144:lloZMQfsXtioRkts/cnnK6cMldA1GgGhZqZfiQBFUbGb8e1mji:noZItlRk83MldA1GgGhZqZfiQBFUup

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2204-1-0x0000000000830000-0x0000000000870000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2692	powershell.exe
2776	powershell.exe
1632	powershell.exe
2812	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe

Deletes itself 1 IoCs

pid	Process
2612	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

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
2612	cmd.exe
1972	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1936	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1972	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2812	powershell.exe
2692	powershell.exe
2776	powershell.exe
2940	powershell.exe
1632	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe
Token: SeDebugPrivilege	2812	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	2940	powershell.exe
Token: SeIncreaseQuotaPrivilege	2024	wmic.exe
Token: SeSecurityPrivilege	2024	wmic.exe
Token: SeTakeOwnershipPrivilege	2024	wmic.exe
Token: SeLoadDriverPrivilege	2024	wmic.exe
Token: SeSystemProfilePrivilege	2024	wmic.exe
Token: SeSystemtimePrivilege	2024	wmic.exe
Token: SeProfSingleProcessPrivilege	2024	wmic.exe
Token: SeIncBasePriorityPrivilege	2024	wmic.exe
Token: SeCreatePagefilePrivilege	2024	wmic.exe
Token: SeBackupPrivilege	2024	wmic.exe
Token: SeRestorePrivilege	2024	wmic.exe
Token: SeShutdownPrivilege	2024	wmic.exe
Token: SeDebugPrivilege	2024	wmic.exe
Token: SeSystemEnvironmentPrivilege	2024	wmic.exe
Token: SeRemoteShutdownPrivilege	2024	wmic.exe
Token: SeUndockPrivilege	2024	wmic.exe
Token: SeManageVolumePrivilege	2024	wmic.exe
Token: 33	2024	wmic.exe
Token: 34	2024	wmic.exe
Token: 35	2024	wmic.exe
Token: SeIncreaseQuotaPrivilege	2024	wmic.exe
Token: SeSecurityPrivilege	2024	wmic.exe
Token: SeTakeOwnershipPrivilege	2024	wmic.exe
Token: SeLoadDriverPrivilege	2024	wmic.exe
Token: SeSystemProfilePrivilege	2024	wmic.exe
Token: SeSystemtimePrivilege	2024	wmic.exe
Token: SeProfSingleProcessPrivilege	2024	wmic.exe
Token: SeIncBasePriorityPrivilege	2024	wmic.exe
Token: SeCreatePagefilePrivilege	2024	wmic.exe
Token: SeBackupPrivilege	2024	wmic.exe
Token: SeRestorePrivilege	2024	wmic.exe
Token: SeShutdownPrivilege	2024	wmic.exe
Token: SeDebugPrivilege	2024	wmic.exe
Token: SeSystemEnvironmentPrivilege	2024	wmic.exe
Token: SeRemoteShutdownPrivilege	2024	wmic.exe
Token: SeUndockPrivilege	2024	wmic.exe
Token: SeManageVolumePrivilege	2024	wmic.exe
Token: 33	2024	wmic.exe
Token: 34	2024	wmic.exe
Token: 35	2024	wmic.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 36 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2976	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	31
PID 2204 wrote to memory of 2976	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	31
PID 2204 wrote to memory of 2976	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	31
PID 2204 wrote to memory of 2812	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	33
PID 2204 wrote to memory of 2812	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	33
PID 2204 wrote to memory of 2812	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	33
PID 2204 wrote to memory of 2692	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	35
PID 2204 wrote to memory of 2692	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	35
PID 2204 wrote to memory of 2692	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	35
PID 2204 wrote to memory of 2776	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	37
PID 2204 wrote to memory of 2776	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	37
PID 2204 wrote to memory of 2776	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	37
PID 2204 wrote to memory of 2940	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	39
PID 2204 wrote to memory of 2940	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	39
PID 2204 wrote to memory of 2940	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	39
PID 2204 wrote to memory of 2024	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	41
PID 2204 wrote to memory of 2024	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	41
PID 2204 wrote to memory of 2024	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	41
PID 2204 wrote to memory of 1680	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	44
PID 2204 wrote to memory of 1680	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	44
PID 2204 wrote to memory of 1680	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	44
PID 2204 wrote to memory of 2484	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	46
PID 2204 wrote to memory of 2484	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	46
PID 2204 wrote to memory of 2484	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	46
PID 2204 wrote to memory of 1632	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	48
PID 2204 wrote to memory of 1632	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	48
PID 2204 wrote to memory of 1632	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	48
PID 2204 wrote to memory of 1936	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	50
PID 2204 wrote to memory of 1936	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	50
PID 2204 wrote to memory of 1936	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	50
PID 2204 wrote to memory of 2612	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	52
PID 2204 wrote to memory of 2612	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	52
PID 2204 wrote to memory of 2612	2204	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	52
PID 2612 wrote to memory of 1972	2612	cmd.exe	54
PID 2612 wrote to memory of 1972	2612	cmd.exe	54
PID 2612 wrote to memory of 1972	2612	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2976	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe
"C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe"
  2⤵
  - Views/modifies file attributes
  PID:2976
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2812
- 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:2692
- 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:2776
- 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:2940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2024
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2484
- 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:1632
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1936
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1972

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
17421cd90e915baa02f5d4680ed6c679

SHA1
08f6fbe209a7f8f1143f707475e425c719ef5ebf

SHA256
f46d139fdc0461a9cb5aab136d094b9e3ed2ec4a9edb645b16976cd91d8f551b

SHA512
4bcc4d9f5aaaf83679b8955d68b12e32dcb29c3e0e1be0d5c911b9d614ff42b8425432db389176fa2f9bb9190c714fe492761c748111a2f4528f6de039e0a1b9

Download Submit
memory/2204-1-0x0000000000830000-0x0000000000870000-memory.dmp

Filesize
256KB

Download
memory/2204-2-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-54-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-0-0x000007FEF5C73000-0x000007FEF5C74000-memory.dmp

Filesize
4KB

Download
memory/2204-50-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-49-0x000007FEF5C73000-0x000007FEF5C74000-memory.dmp

Filesize
4KB

Download
memory/2692-22-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/2692-21-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2812-8-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2812-14-0x000007FEEDA40000-0x000007FEEE3DD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-15-0x000007FEEDA40000-0x000007FEEE3DD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-9-0x000007FEEDA40000-0x000007FEEE3DD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-12-0x000007FEEDA40000-0x000007FEEE3DD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-13-0x000007FEEDA40000-0x000007FEEE3DD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-10-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2812-11-0x000007FEEDA40000-0x000007FEEE3DD000-memory.dmp

Filesize
9.6MB

Download
memory/2812-7-0x000007FEEDCFE000-0x000007FEEDCFF000-memory.dmp

Filesize
4KB

Download