umbral | 18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/09/2024, 05:52

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General

Target

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
Size

231KB
MD5

2e5358fcd0403cf1c6dd36a32952d9ea
SHA1

cb03dcf965d79b39657643469b6bbdec205c0a22
SHA256

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922
SHA512

0bc336ebad20497f6d8a89db417106ae0f306bd34588e1118b6d82b1da63890ab7ef35b646d259ac78d7c92bc3fcf87d96596f9c61de31910c7d2c4a3ebfaaac
SSDEEP

6144:xloZMarIkd8g+EtXHkv/iD4kNJe5nsAvEOXZkQlzIb8e1m2P7Ai:DoZhL+EP8kNJe5nsAvEOXZkQlE57Z

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2676-1-0x00000000003C0000-0x0000000000400000-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
2524	powershell.exe
2960	powershell.exe
1000	powershell.exe
2772	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe

Deletes itself 1 IoCs

pid	Process
1984	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
7	discord.com
8	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
1984	cmd.exe
2296	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1980	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2296	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
2524	powershell.exe
2772	powershell.exe
2960	powershell.exe
2608	powershell.exe
1000	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe
Token: 35	2576	wmic.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe
Token: 35	2576	wmic.exe
Token: SeDebugPrivilege	2524	powershell.exe
Token: SeDebugPrivilege	2772	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeIncreaseQuotaPrivilege	304	wmic.exe
Token: SeSecurityPrivilege	304	wmic.exe
Token: SeTakeOwnershipPrivilege	304	wmic.exe
Token: SeLoadDriverPrivilege	304	wmic.exe
Token: SeSystemProfilePrivilege	304	wmic.exe
Token: SeSystemtimePrivilege	304	wmic.exe
Token: SeProfSingleProcessPrivilege	304	wmic.exe
Token: SeIncBasePriorityPrivilege	304	wmic.exe
Token: SeCreatePagefilePrivilege	304	wmic.exe
Token: SeBackupPrivilege	304	wmic.exe
Token: SeRestorePrivilege	304	wmic.exe
Token: SeShutdownPrivilege	304	wmic.exe
Token: SeDebugPrivilege	304	wmic.exe
Token: SeSystemEnvironmentPrivilege	304	wmic.exe
Token: SeRemoteShutdownPrivilege	304	wmic.exe
Token: SeUndockPrivilege	304	wmic.exe
Token: SeManageVolumePrivilege	304	wmic.exe
Token: 33	304	wmic.exe
Token: 34	304	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2676 wrote to memory of 2576	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	30
PID 2676 wrote to memory of 2576	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	30
PID 2676 wrote to memory of 2576	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	30
PID 2676 wrote to memory of 2824	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	33
PID 2676 wrote to memory of 2824	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	33
PID 2676 wrote to memory of 2824	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	33
PID 2676 wrote to memory of 2524	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	35
PID 2676 wrote to memory of 2524	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	35
PID 2676 wrote to memory of 2524	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	35
PID 2676 wrote to memory of 2772	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	37
PID 2676 wrote to memory of 2772	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	37
PID 2676 wrote to memory of 2772	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	37
PID 2676 wrote to memory of 2960	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	39
PID 2676 wrote to memory of 2960	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	39
PID 2676 wrote to memory of 2960	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	39
PID 2676 wrote to memory of 2608	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	41
PID 2676 wrote to memory of 2608	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	41
PID 2676 wrote to memory of 2608	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	41
PID 2676 wrote to memory of 304	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	43
PID 2676 wrote to memory of 304	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	43
PID 2676 wrote to memory of 304	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	43
PID 2676 wrote to memory of 2152	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	45
PID 2676 wrote to memory of 2152	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	45
PID 2676 wrote to memory of 2152	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	45
PID 2676 wrote to memory of 1500	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	47
PID 2676 wrote to memory of 1500	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	47
PID 2676 wrote to memory of 1500	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	47
PID 2676 wrote to memory of 1000	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	49
PID 2676 wrote to memory of 1000	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	49
PID 2676 wrote to memory of 1000	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	49
PID 2676 wrote to memory of 1980	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	51
PID 2676 wrote to memory of 1980	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	51
PID 2676 wrote to memory of 1980	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	51
PID 2676 wrote to memory of 1984	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	53
PID 2676 wrote to memory of 1984	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	53
PID 2676 wrote to memory of 1984	2676	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	53
PID 1984 wrote to memory of 2296	1984	cmd.exe	55
PID 1984 wrote to memory of 2296	1984	cmd.exe	55
PID 1984 wrote to memory of 2296	1984	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2824	attrib.exe

C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
"C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2576
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe"
  2⤵
  - Views/modifies file attributes
  PID:2824
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- 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:2772
- 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:2960
- 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:2608
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:304
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2152
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1500
- 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:1000
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1980
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1984
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2296

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
ada12807793f5ba4f7a558dce2ed4541

SHA1
e96f7519fa07ce81fc80d3b63a1166b435467058

SHA256
450b7399ccb1e705135a534991122a6e4df7a3d93851ae8b2bcd06ca16bf6a7b

SHA512
31be86d3ecdc7e0ace2d33b542f20c5365941c16cda5d665abcc33f77c660b7e6f089e06d86f068c82610b1c489f0d8f7378037a821e8a5a096fe7062a86f70c

Download Submit
memory/1000-41-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download
memory/2524-7-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2524-8-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download
memory/2676-0-0x000007FEF62E3000-0x000007FEF62E4000-memory.dmp

Filesize
4KB

Download
memory/2676-1-0x00000000003C0000-0x0000000000400000-memory.dmp

Filesize
256KB

Download
memory/2676-2-0x000007FEF62E0000-0x000007FEF6CCC000-memory.dmp

Filesize
9.9MB

Download
memory/2676-44-0x000007FEF62E0000-0x000007FEF6CCC000-memory.dmp

Filesize
9.9MB

Download
memory/2772-14-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2772-15-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download