umbral | 0bb64c9c095b99117d8250f97cda9a257985ce3ba6b5891796c7ece426b61ed0

Analysis

max time kernel
16s
max time network
17s
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

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

rnZ46.scr.exe
Size

227KB
MD5

fe415b65db443f8d7e3aa075d79b4a72
SHA1

71fa4604b053ac55c7afa5a2d87ea0bcf8d0a116
SHA256

0bb64c9c095b99117d8250f97cda9a257985ce3ba6b5891796c7ece426b61ed0
SHA512

dc715d2c938f22446f155afa615adbee775eb7abdc688b204037eccadd435490be3ab0fe6b2a9d493cb357de5730e864ffb842c42dc3051671a7fbc9a9117fb8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4W9YhFzQEbmCzFQMpi+b8e1mSPi:ooZOL+EP8W9YhFzQEbmCzFQMp9Pa

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/676-1-0x00000000000D0000-0x0000000000110000-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
2088	powershell.exe
1436	powershell.exe
2412	powershell.exe
3008	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	rnZ46.scr.exe

Deletes itself 1 IoCs

pid	Process
2116	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
2116	cmd.exe
1232	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1100	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1232	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2088	powershell.exe
1436	powershell.exe
2412	powershell.exe
2544	powershell.exe
3008	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	676	rnZ46.scr.exe
Token: SeDebugPrivilege	2088	powershell.exe
Token: SeDebugPrivilege	1436	powershell.exe
Token: SeDebugPrivilege	2412	powershell.exe
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeIncreaseQuotaPrivilege	1672	wmic.exe
Token: SeSecurityPrivilege	1672	wmic.exe
Token: SeTakeOwnershipPrivilege	1672	wmic.exe
Token: SeLoadDriverPrivilege	1672	wmic.exe
Token: SeSystemProfilePrivilege	1672	wmic.exe
Token: SeSystemtimePrivilege	1672	wmic.exe
Token: SeProfSingleProcessPrivilege	1672	wmic.exe
Token: SeIncBasePriorityPrivilege	1672	wmic.exe
Token: SeCreatePagefilePrivilege	1672	wmic.exe
Token: SeBackupPrivilege	1672	wmic.exe
Token: SeRestorePrivilege	1672	wmic.exe
Token: SeShutdownPrivilege	1672	wmic.exe
Token: SeDebugPrivilege	1672	wmic.exe
Token: SeSystemEnvironmentPrivilege	1672	wmic.exe
Token: SeRemoteShutdownPrivilege	1672	wmic.exe
Token: SeUndockPrivilege	1672	wmic.exe
Token: SeManageVolumePrivilege	1672	wmic.exe
Token: 33	1672	wmic.exe
Token: 34	1672	wmic.exe
Token: 35	1672	wmic.exe
Token: SeIncreaseQuotaPrivilege	1672	wmic.exe
Token: SeSecurityPrivilege	1672	wmic.exe
Token: SeTakeOwnershipPrivilege	1672	wmic.exe
Token: SeLoadDriverPrivilege	1672	wmic.exe
Token: SeSystemProfilePrivilege	1672	wmic.exe
Token: SeSystemtimePrivilege	1672	wmic.exe
Token: SeProfSingleProcessPrivilege	1672	wmic.exe
Token: SeIncBasePriorityPrivilege	1672	wmic.exe
Token: SeCreatePagefilePrivilege	1672	wmic.exe
Token: SeBackupPrivilege	1672	wmic.exe
Token: SeRestorePrivilege	1672	wmic.exe
Token: SeShutdownPrivilege	1672	wmic.exe
Token: SeDebugPrivilege	1672	wmic.exe
Token: SeSystemEnvironmentPrivilege	1672	wmic.exe
Token: SeRemoteShutdownPrivilege	1672	wmic.exe
Token: SeUndockPrivilege	1672	wmic.exe
Token: SeManageVolumePrivilege	1672	wmic.exe
Token: 33	1672	wmic.exe
Token: 34	1672	wmic.exe
Token: 35	1672	wmic.exe
Token: SeIncreaseQuotaPrivilege	2872	wmic.exe
Token: SeSecurityPrivilege	2872	wmic.exe
Token: SeTakeOwnershipPrivilege	2872	wmic.exe
Token: SeLoadDriverPrivilege	2872	wmic.exe
Token: SeSystemProfilePrivilege	2872	wmic.exe
Token: SeSystemtimePrivilege	2872	wmic.exe
Token: SeProfSingleProcessPrivilege	2872	wmic.exe
Token: SeIncBasePriorityPrivilege	2872	wmic.exe
Token: SeCreatePagefilePrivilege	2872	wmic.exe
Token: SeBackupPrivilege	2872	wmic.exe
Token: SeRestorePrivilege	2872	wmic.exe
Token: SeShutdownPrivilege	2872	wmic.exe
Token: SeDebugPrivilege	2872	wmic.exe
Token: SeSystemEnvironmentPrivilege	2872	wmic.exe
Token: SeRemoteShutdownPrivilege	2872	wmic.exe
Token: SeUndockPrivilege	2872	wmic.exe
Token: SeManageVolumePrivilege	2872	wmic.exe
Token: 33	2872	wmic.exe
Token: 34	2872	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 676 wrote to memory of 2804	676	rnZ46.scr.exe	30
PID 676 wrote to memory of 2804	676	rnZ46.scr.exe	30
PID 676 wrote to memory of 2804	676	rnZ46.scr.exe	30
PID 676 wrote to memory of 2088	676	rnZ46.scr.exe	32
PID 676 wrote to memory of 2088	676	rnZ46.scr.exe	32
PID 676 wrote to memory of 2088	676	rnZ46.scr.exe	32
PID 676 wrote to memory of 1436	676	rnZ46.scr.exe	34
PID 676 wrote to memory of 1436	676	rnZ46.scr.exe	34
PID 676 wrote to memory of 1436	676	rnZ46.scr.exe	34
PID 676 wrote to memory of 2412	676	rnZ46.scr.exe	36
PID 676 wrote to memory of 2412	676	rnZ46.scr.exe	36
PID 676 wrote to memory of 2412	676	rnZ46.scr.exe	36
PID 676 wrote to memory of 2544	676	rnZ46.scr.exe	38
PID 676 wrote to memory of 2544	676	rnZ46.scr.exe	38
PID 676 wrote to memory of 2544	676	rnZ46.scr.exe	38
PID 676 wrote to memory of 1672	676	rnZ46.scr.exe	40
PID 676 wrote to memory of 1672	676	rnZ46.scr.exe	40
PID 676 wrote to memory of 1672	676	rnZ46.scr.exe	40
PID 676 wrote to memory of 2872	676	rnZ46.scr.exe	43
PID 676 wrote to memory of 2872	676	rnZ46.scr.exe	43
PID 676 wrote to memory of 2872	676	rnZ46.scr.exe	43
PID 676 wrote to memory of 2944	676	rnZ46.scr.exe	45
PID 676 wrote to memory of 2944	676	rnZ46.scr.exe	45
PID 676 wrote to memory of 2944	676	rnZ46.scr.exe	45
PID 676 wrote to memory of 3008	676	rnZ46.scr.exe	47
PID 676 wrote to memory of 3008	676	rnZ46.scr.exe	47
PID 676 wrote to memory of 3008	676	rnZ46.scr.exe	47
PID 676 wrote to memory of 1100	676	rnZ46.scr.exe	49
PID 676 wrote to memory of 1100	676	rnZ46.scr.exe	49
PID 676 wrote to memory of 1100	676	rnZ46.scr.exe	49
PID 676 wrote to memory of 2116	676	rnZ46.scr.exe	51
PID 676 wrote to memory of 2116	676	rnZ46.scr.exe	51
PID 676 wrote to memory of 2116	676	rnZ46.scr.exe	51
PID 2116 wrote to memory of 1232	2116	cmd.exe	53
PID 2116 wrote to memory of 1232	2116	cmd.exe	53
PID 2116 wrote to memory of 1232	2116	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2804	attrib.exe

C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe
"C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:676
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe"
  2⤵
  - Views/modifies file attributes
  PID:2804
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2088
- 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:1436
- 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:2412
- 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:2544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1672
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2944
- 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:3008
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1100
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2116
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1232

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
7KB

MD5
4d19eca2a5df2f62fd48e046a7985ccc

SHA1
6d25e7d8cca3e89d4a3ba947f16a3b0d83b58e88

SHA256
2232fb07aa312db10df1c18452b5146584c33b3a43063a08971ee86f2bc6911c

SHA512
56be556549d63c26b378dd2c89ffa2fd87ef57eb40e4443dd12b1c7e57edadae47a5f151a79aa963c476f0a65d79727db87a3716328ea7a4d45cec90817c3d98

Download Submit
memory/676-1-0x00000000000D0000-0x0000000000110000-memory.dmp

Filesize
256KB

Download
memory/676-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/676-55-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/676-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/1436-22-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/1436-21-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2088-8-0x000000001B520000-0x000000001B802000-memory.dmp

Filesize
2.9MB

Download
memory/2088-11-0x000007FEEC980000-0x000007FEED31D000-memory.dmp

Filesize
9.6MB

Download
memory/2088-14-0x000007FEEC980000-0x000007FEED31D000-memory.dmp

Filesize
9.6MB

Download
memory/2088-15-0x000007FEEC980000-0x000007FEED31D000-memory.dmp

Filesize
9.6MB

Download
memory/2088-13-0x000007FEEC980000-0x000007FEED31D000-memory.dmp

Filesize
9.6MB

Download
memory/2088-12-0x000007FEEC980000-0x000007FEED31D000-memory.dmp

Filesize
9.6MB

Download
memory/2088-9-0x0000000002000000-0x0000000002008000-memory.dmp

Filesize
32KB

Download
memory/2088-10-0x000007FEEC980000-0x000007FEED31D000-memory.dmp

Filesize
9.6MB

Download
memory/2088-7-0x000007FEECC3E000-0x000007FEECC3F000-memory.dmp

Filesize
4KB

Download
memory/3008-51-0x0000000002A10000-0x0000000002A18000-memory.dmp

Filesize
32KB

Download