umbral | 0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b

Analysis

max time kernel
16s
max time network
17s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
11-12-2024 21:08

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General

Target

NerestPCFree 0.31.1 fixed.exe
Size

231KB
MD5

08dce587975cb4a6cb1333bd7d3aea6c
SHA1

4c855f6bb5cad027522d0a063cb4f1cd6e97b163
SHA256

0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b
SHA512

19f21d6f976a971f4bffbf74a7b6450ec6b6ec02d837422a5c5edbd3fb825e630642e4b840e181484a2e0e47997631ad7012f1f710aa098538164c8998592f81
SSDEEP

6144:xloZMCrIkd8g+EtXHkv/iD4LsUtt74szYKrd4UBr8b8e1mOoi:DoZZL+EP8LsUtt74szYKrd4UBAJ

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2172-1-0x00000000012E0000-0x0000000001320000-memory.dmp	family_umbral

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

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
2844	powershell.exe
2708	powershell.exe
2132	powershell.exe
1976	powershell.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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	discord.com
9	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2016	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2844	powershell.exe
2708	powershell.exe
2132	powershell.exe
2984	powershell.exe
1976	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	NerestPCFree 0.31.1 fixed.exe
Token: SeDebugPrivilege	2844	powershell.exe
Token: SeDebugPrivilege	2708	powershell.exe
Token: SeDebugPrivilege	2132	powershell.exe
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeIncreaseQuotaPrivilege	1932	wmic.exe
Token: SeSecurityPrivilege	1932	wmic.exe
Token: SeTakeOwnershipPrivilege	1932	wmic.exe
Token: SeLoadDriverPrivilege	1932	wmic.exe
Token: SeSystemProfilePrivilege	1932	wmic.exe
Token: SeSystemtimePrivilege	1932	wmic.exe
Token: SeProfSingleProcessPrivilege	1932	wmic.exe
Token: SeIncBasePriorityPrivilege	1932	wmic.exe
Token: SeCreatePagefilePrivilege	1932	wmic.exe
Token: SeBackupPrivilege	1932	wmic.exe
Token: SeRestorePrivilege	1932	wmic.exe
Token: SeShutdownPrivilege	1932	wmic.exe
Token: SeDebugPrivilege	1932	wmic.exe
Token: SeSystemEnvironmentPrivilege	1932	wmic.exe
Token: SeRemoteShutdownPrivilege	1932	wmic.exe
Token: SeUndockPrivilege	1932	wmic.exe
Token: SeManageVolumePrivilege	1932	wmic.exe
Token: 33	1932	wmic.exe
Token: 34	1932	wmic.exe
Token: 35	1932	wmic.exe
Token: SeIncreaseQuotaPrivilege	1932	wmic.exe
Token: SeSecurityPrivilege	1932	wmic.exe
Token: SeTakeOwnershipPrivilege	1932	wmic.exe
Token: SeLoadDriverPrivilege	1932	wmic.exe
Token: SeSystemProfilePrivilege	1932	wmic.exe
Token: SeSystemtimePrivilege	1932	wmic.exe
Token: SeProfSingleProcessPrivilege	1932	wmic.exe
Token: SeIncBasePriorityPrivilege	1932	wmic.exe
Token: SeCreatePagefilePrivilege	1932	wmic.exe
Token: SeBackupPrivilege	1932	wmic.exe
Token: SeRestorePrivilege	1932	wmic.exe
Token: SeShutdownPrivilege	1932	wmic.exe
Token: SeDebugPrivilege	1932	wmic.exe
Token: SeSystemEnvironmentPrivilege	1932	wmic.exe
Token: SeRemoteShutdownPrivilege	1932	wmic.exe
Token: SeUndockPrivilege	1932	wmic.exe
Token: SeManageVolumePrivilege	1932	wmic.exe
Token: 33	1932	wmic.exe
Token: 34	1932	wmic.exe
Token: 35	1932	wmic.exe
Token: SeIncreaseQuotaPrivilege	1028	wmic.exe
Token: SeSecurityPrivilege	1028	wmic.exe
Token: SeTakeOwnershipPrivilege	1028	wmic.exe
Token: SeLoadDriverPrivilege	1028	wmic.exe
Token: SeSystemProfilePrivilege	1028	wmic.exe
Token: SeSystemtimePrivilege	1028	wmic.exe
Token: SeProfSingleProcessPrivilege	1028	wmic.exe
Token: SeIncBasePriorityPrivilege	1028	wmic.exe
Token: SeCreatePagefilePrivilege	1028	wmic.exe
Token: SeBackupPrivilege	1028	wmic.exe
Token: SeRestorePrivilege	1028	wmic.exe
Token: SeShutdownPrivilege	1028	wmic.exe
Token: SeDebugPrivilege	1028	wmic.exe
Token: SeSystemEnvironmentPrivilege	1028	wmic.exe
Token: SeRemoteShutdownPrivilege	1028	wmic.exe
Token: SeUndockPrivilege	1028	wmic.exe
Token: SeManageVolumePrivilege	1028	wmic.exe
Token: 33	1028	wmic.exe
Token: 34	1028	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2844	2172	NerestPCFree 0.31.1 fixed.exe	31
PID 2172 wrote to memory of 2844	2172	NerestPCFree 0.31.1 fixed.exe	31
PID 2172 wrote to memory of 2844	2172	NerestPCFree 0.31.1 fixed.exe	31
PID 2172 wrote to memory of 2708	2172	NerestPCFree 0.31.1 fixed.exe	33
PID 2172 wrote to memory of 2708	2172	NerestPCFree 0.31.1 fixed.exe	33
PID 2172 wrote to memory of 2708	2172	NerestPCFree 0.31.1 fixed.exe	33
PID 2172 wrote to memory of 2132	2172	NerestPCFree 0.31.1 fixed.exe	35
PID 2172 wrote to memory of 2132	2172	NerestPCFree 0.31.1 fixed.exe	35
PID 2172 wrote to memory of 2132	2172	NerestPCFree 0.31.1 fixed.exe	35
PID 2172 wrote to memory of 2984	2172	NerestPCFree 0.31.1 fixed.exe	37
PID 2172 wrote to memory of 2984	2172	NerestPCFree 0.31.1 fixed.exe	37
PID 2172 wrote to memory of 2984	2172	NerestPCFree 0.31.1 fixed.exe	37
PID 2172 wrote to memory of 1932	2172	NerestPCFree 0.31.1 fixed.exe	39
PID 2172 wrote to memory of 1932	2172	NerestPCFree 0.31.1 fixed.exe	39
PID 2172 wrote to memory of 1932	2172	NerestPCFree 0.31.1 fixed.exe	39
PID 2172 wrote to memory of 1028	2172	NerestPCFree 0.31.1 fixed.exe	42
PID 2172 wrote to memory of 1028	2172	NerestPCFree 0.31.1 fixed.exe	42
PID 2172 wrote to memory of 1028	2172	NerestPCFree 0.31.1 fixed.exe	42
PID 2172 wrote to memory of 2920	2172	NerestPCFree 0.31.1 fixed.exe	44
PID 2172 wrote to memory of 2920	2172	NerestPCFree 0.31.1 fixed.exe	44
PID 2172 wrote to memory of 2920	2172	NerestPCFree 0.31.1 fixed.exe	44
PID 2172 wrote to memory of 1976	2172	NerestPCFree 0.31.1 fixed.exe	46
PID 2172 wrote to memory of 1976	2172	NerestPCFree 0.31.1 fixed.exe	46
PID 2172 wrote to memory of 1976	2172	NerestPCFree 0.31.1 fixed.exe	46
PID 2172 wrote to memory of 2016	2172	NerestPCFree 0.31.1 fixed.exe	48
PID 2172 wrote to memory of 2016	2172	NerestPCFree 0.31.1 fixed.exe	48
PID 2172 wrote to memory of 2016	2172	NerestPCFree 0.31.1 fixed.exe	48

C:\Users\Admin\AppData\Local\Temp\NerestPCFree 0.31.1 fixed.exe
"C:\Users\Admin\AppData\Local\Temp\NerestPCFree 0.31.1 fixed.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\NerestPCFree 0.31.1 fixed.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2844
- 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:2708
- 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:2132
- 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:2984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2920
- 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:1976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2016

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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
1ed5264e4a1b790e727a332c7cd739f9

SHA1
f7884565d39ea78518c1038167027b9a217ae16d

SHA256
29572316cd7c6643ddc4efdd96acbcc191bd55eaa367335dd467e65c4c32eeb2

SHA512
40684c5fabdad10d112aa4ddf345222e8c96c64951c28786e42d3833abf3eabd46422f6d1a4fdd6f83b8a944dab5d722ae6850c21a28654d5d4e908dfb7feb8f

Download Submit
memory/1976-45-0x000000001B4A0000-0x000000001B782000-memory.dmp

Filesize
2.9MB

Download
memory/2172-1-0x00000000012E0000-0x0000000001320000-memory.dmp

Filesize
256KB

Download
memory/2172-2-0x000007FEF65E0000-0x000007FEF6FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2172-50-0x000007FEF65E0000-0x000007FEF6FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2172-0-0x000007FEF65E3000-0x000007FEF65E4000-memory.dmp

Filesize
4KB

Download
memory/2172-46-0x000007FEF65E0000-0x000007FEF6FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2172-39-0x000007FEF65E3000-0x000007FEF65E4000-memory.dmp

Filesize
4KB

Download
memory/2708-22-0x0000000001D00000-0x0000000001D08000-memory.dmp

Filesize
32KB

Download
memory/2708-21-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2844-8-0x000000001B6B0000-0x000000001B992000-memory.dmp

Filesize
2.9MB

Download
memory/2844-15-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2844-14-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2844-13-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2844-12-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2844-11-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2844-10-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2844-9-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2844-7-0x000007FEEDCCE000-0x000007FEEDCCF000-memory.dmp

Filesize
4KB

Download